/*
* Copyright (c) 2014-2015, Juniper Networks, Inc.
* All rights reserved.
* This SOFTWARE is licensed under the LICENSE provided in the
* ../Copyright file. By downloading, installing, copying, or otherwise
* using the SOFTWARE, you agree to be bound by the terms of that
* LICENSE.
* Phil Shafer, July 2014
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <stddef.h>
#include <wchar.h>
#include <locale.h>
#include <sys/types.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <ctype.h>
#include <wctype.h>
#include <getopt.h>
#include "xoconfig.h"
#include "xo.h"
#include "xoversion.h"
#ifdef HAVE_STDIO_EXT_H
#include <stdio_ext.h>
#endif /* HAVE_STDIO_EXT_H */
const char xo_version[] = LIBXO_VERSION;
const char xo_version_extra[] = LIBXO_VERSION_EXTRA;
#ifndef UNUSED
#define UNUSED __attribute__ ((__unused__))
#endif /* UNUSED */
#define XO_INDENT_BY 2 /* Amount to indent when pretty printing */
#define XO_BUFSIZ (8*1024) /* Initial buffer size */
#define XO_DEPTH 512 /* Default stack depth */
#define XO_MAX_ANCHOR_WIDTH (8*1024) /* Anything wider is just sillyb */
#define XO_FAILURE_NAME "failure"
/*
* xo_buffer_t: a memory buffer that can be grown as needed. We
* use them for building format strings and output data.
*/
typedef struct xo_buffer_s {
char *xb_bufp; /* Buffer memory */
char *xb_curp; /* Current insertion point */
int xb_size; /* Size of buffer */
} xo_buffer_t;
/* Flags for the stack frame */
typedef unsigned xo_xsf_flags_t; /* XSF_* flags */
#define XSF_NOT_FIRST (1<<0) /* Not the first element */
#define XSF_LIST (1<<1) /* Frame is a list */
#define XSF_INSTANCE (1<<2) /* Frame is an instance */
#define XSF_DTRT (1<<3) /* Save the name for DTRT mode */
#define XSF_CONTENT (1<<4) /* Some content has been emitted */
#define XSF_EMIT (1<<5) /* Some field has been emitted */
#define XSF_EMIT_KEY (1<<6) /* A key has been emitted */
#define XSF_EMIT_LEAF_LIST (1<<7) /* A leaf-list field has been emitted */
/* These are the flags we propagate between markers and their parents */
#define XSF_MARKER_FLAGS \
(XSF_NOT_FIRST | XSF_CONTENT | XSF_EMIT | XSF_EMIT_KEY | XSF_EMIT_LEAF_LIST )
/*
* A word about states: We're moving to a finite state machine (FMS)
* approach to help remove fragility from the caller's code. Instead
* of requiring a specific order of calls, we'll allow the caller more
* flexibility and make the library responsible for recovering from
* missed steps. The goal is that the library should not be capable of
* emitting invalid xml or json, but the developer shouldn't need
* to know or understand all the details about these encodings.
*
* You can think of states as either states or event, since they
* function rather like both. None of the XO_CLOSE_* events will
* persist as states, since their stack frame will be popped.
* Same is true of XSS_EMIT, which is an event that asks us to
* prep for emitting output fields.
*/
/* Stack frame states */
typedef unsigned xo_state_t;
#define XSS_INIT 0 /* Initial stack state */
#define XSS_OPEN_CONTAINER 1
#define XSS_CLOSE_CONTAINER 2
#define XSS_OPEN_LIST 3
#define XSS_CLOSE_LIST 4
#define XSS_OPEN_INSTANCE 5
#define XSS_CLOSE_INSTANCE 6
#define XSS_OPEN_LEAF_LIST 7
#define XSS_CLOSE_LEAF_LIST 8
#define XSS_DISCARDING 9 /* Discarding data until recovered */
#define XSS_MARKER 10 /* xo_open_marker's marker */
#define XSS_EMIT 11 /* xo_emit has a leaf field */
#define XSS_EMIT_LEAF_LIST 12 /* xo_emit has a leaf-list ({l:}) */
#define XSS_FINISH 13 /* xo_finish was called */
#define XSS_MAX 13
#define XSS_TRANSITION(_old, _new) ((_old) << 8 | (_new))
/*
* xo_stack_t: As we open and close containers and levels, we
* create a stack of frames to track them. This is needed for
* XOF_WARN and XOF_XPATH.
*/
typedef struct xo_stack_s {
xo_xsf_flags_t xs_flags; /* Flags for this frame */
xo_state_t xs_state; /* State for this stack frame */
char *xs_name; /* Name (for XPath value) */
char *xs_keys; /* XPath predicate for any key fields */
} xo_stack_t;
/*
* xo_handle_t: this is the principle data structure for libxo.
* It's used as a store for state, options, and content.
*/
struct xo_handle_s {
xo_xof_flags_t xo_flags; /* Flags */
unsigned short xo_style; /* XO_STYLE_* value */
unsigned short xo_indent; /* Indent level (if pretty) */
unsigned short xo_indent_by; /* Indent amount (tab stop) */
xo_write_func_t xo_write; /* Write callback */
xo_close_func_t xo_close; /* Close callback */
xo_flush_func_t xo_flush; /* Flush callback */
xo_formatter_t xo_formatter; /* Custom formating function */
xo_checkpointer_t xo_checkpointer; /* Custom formating support function */
void *xo_opaque; /* Opaque data for write function */
FILE *xo_fp; /* XXX File pointer */
xo_buffer_t xo_data; /* Output data */
xo_buffer_t xo_fmt; /* Work area for building format strings */
xo_buffer_t xo_attrs; /* Work area for building XML attributes */
xo_buffer_t xo_predicate; /* Work area for building XPath predicates */
xo_stack_t *xo_stack; /* Stack pointer */
int xo_depth; /* Depth of stack */
int xo_stack_size; /* Size of the stack */
xo_info_t *xo_info; /* Info fields for all elements */
int xo_info_count; /* Number of info entries */
va_list xo_vap; /* Variable arguments (stdargs) */
char *xo_leading_xpath; /* A leading XPath expression */
mbstate_t xo_mbstate; /* Multi-byte character conversion state */
unsigned xo_anchor_offset; /* Start of anchored text */
unsigned xo_anchor_columns; /* Number of columns since the start anchor */
int xo_anchor_min_width; /* Desired width of anchored text */
unsigned xo_units_offset; /* Start of units insertion point */
unsigned xo_columns; /* Columns emitted during this xo_emit call */
};
/* Flags for formatting functions */
typedef unsigned long xo_xff_flags_t;
#define XFF_COLON (1<<0) /* Append a ":" */
#define XFF_COMMA (1<<1) /* Append a "," iff there's more output */
#define XFF_WS (1<<2) /* Append a blank */
#define XFF_ENCODE_ONLY (1<<3) /* Only emit for encoding formats (xml and json) */
#define XFF_QUOTE (1<<4) /* Force quotes */
#define XFF_NOQUOTE (1<<5) /* Force no quotes */
#define XFF_DISPLAY_ONLY (1<<6) /* Only emit for display formats (text and html) */
#define XFF_KEY (1<<7) /* Field is a key (for XPath) */
#define XFF_XML (1<<8) /* Force XML encoding style (for XPath) */
#define XFF_ATTR (1<<9) /* Escape value using attribute rules (XML) */
#define XFF_BLANK_LINE (1<<10) /* Emit a blank line */
#define XFF_NO_OUTPUT (1<<11) /* Do not make any output */
#define XFF_TRIM_WS (1<<12) /* Trim whitespace off encoded values */
#define XFF_LEAF_LIST (1<<13) /* A leaf-list (list of values) */
#define XFF_UNESCAPE (1<<14) /* Need to printf-style unescape the value */
/*
* Normal printf has width and precision, which for strings operate as
* min and max number of columns. But this depends on the idea that
* one byte means one column, which UTF-8 and multi-byte characters
* pitches on its ear. It may take 40 bytes of data to populate 14
* columns, but we can't go off looking at 40 bytes of data without the
* caller's permission for fear/knowledge that we'll generate core files.
*
* So we make three values, distinguishing between "max column" and
* "number of bytes that we will inspect inspect safely" We call the
* later "size", and make the format "%[[<min>].[[<size>].<max>]]s".
*
* Under the "first do no harm" theory, we default "max" to "size".
* This is a reasonable assumption for folks that don't grok the
* MBS/WCS/UTF-8 world, and while it will be annoying, it will never
* be evil.
*
* For example, xo_emit("{:tag/%-14.14s}", buf) will make 14
* columns of output, but will never look at more than 14 bytes of the
* input buffer. This is mostly compatible with printf and caller's
* expectations.
*
* In contrast xo_emit("{:tag/%-14..14s}", buf) will look at however
* many bytes (or until a NUL is seen) are needed to fill 14 columns
* of output. xo_emit("{:tag/%-14.*.14s}", xx, buf) will look at up
* to xx bytes (or until a NUL is seen) in order to fill 14 columns
* of output.
*
* It's fairly amazing how a good idea (handle all languages of the
* world) blows such a big hole in the bottom of the fairly weak boat
* that is C string handling. The simplicity and completenesss are
* sunk in ways we haven't even begun to understand.
*/
#define XF_WIDTH_MIN 0 /* Minimal width */
#define XF_WIDTH_SIZE 1 /* Maximum number of bytes to examine */
#define XF_WIDTH_MAX 2 /* Maximum width */
#define XF_WIDTH_NUM 3 /* Numeric fields in printf (min.size.max) */
/* Input and output string encodings */
#define XF_ENC_WIDE 1 /* Wide characters (wchar_t) */
#define XF_ENC_UTF8 2 /* UTF-8 */
#define XF_ENC_LOCALE 3 /* Current locale */
/*
* A place to parse printf-style format flags for each field
*/
typedef struct xo_format_s {
unsigned char xf_fc; /* Format character */
unsigned char xf_enc; /* Encoding of the string (XF_ENC_*) */
unsigned char xf_skip; /* Skip this field */
unsigned char xf_lflag; /* 'l' (long) */
unsigned char xf_hflag;; /* 'h' (half) */
unsigned char xf_jflag; /* 'j' (intmax_t) */
unsigned char xf_tflag; /* 't' (ptrdiff_t) */
unsigned char xf_zflag; /* 'z' (size_t) */
unsigned char xf_qflag; /* 'q' (quad_t) */
unsigned char xf_seen_minus; /* Seen a minus */
int xf_leading_zero; /* Seen a leading zero (zero fill) */
unsigned xf_dots; /* Seen one or more '.'s */
int xf_width[XF_WIDTH_NUM]; /* Width/precision/size numeric fields */
unsigned xf_stars; /* Seen one or more '*'s */
unsigned char xf_star[XF_WIDTH_NUM]; /* Seen one or more '*'s */
} xo_format_t;
/*
* We keep a default handle to allow callers to avoid having to
* allocate one. Passing NULL to any of our functions will use
* this default handle.
*/
static xo_handle_t xo_default_handle;
static int xo_default_inited;
static int xo_locale_inited;
static const char *xo_program;
/*
* To allow libxo to be used in diverse environment, we allow the
* caller to give callbacks for memory allocation.
*/
static xo_realloc_func_t xo_realloc = realloc;
static xo_free_func_t xo_free = free;
/* Forward declarations */
static void
xo_failure (xo_handle_t *xop, const char *fmt, ...);
static int
xo_transition (xo_handle_t *xop, xo_xsf_flags_t flags, const char *name,
xo_state_t new_state);
static void
xo_buf_append_div (xo_handle_t *xop, const char *class, xo_xff_flags_t flags,
const char *name, int nlen,
const char *value, int vlen,
const char *encoding, int elen);
static void
xo_anchor_clear (xo_handle_t *xop);
/*
* Callback to write data to a FILE pointer
*/
static int
xo_write_to_file (void *opaque, const char *data)
{
FILE *fp = (FILE *) opaque;
return fprintf(fp, "%s", data);
}
/*
* Callback to close a file
*/
static void
xo_close_file (void *opaque)
{
FILE *fp = (FILE *) opaque;
fclose(fp);
}
/*
* Callback to flush a FILE pointer
*/
static int
xo_flush_file (void *opaque)
{
FILE *fp = (FILE *) opaque;
return fflush(fp);
}
/*
* Initialize the contents of an xo_buffer_t.
*/
static void
xo_buf_init (xo_buffer_t *xbp)
{
xbp->xb_size = XO_BUFSIZ;
xbp->xb_bufp = xo_realloc(NULL, xbp->xb_size);
xbp->xb_curp = xbp->xb_bufp;
}
/*
* Initialize the contents of an xo_buffer_t.
*/
static void
xo_buf_cleanup (xo_buffer_t *xbp)
{
if (xbp->xb_bufp)
xo_free(xbp->xb_bufp);
bzero(xbp, sizeof(*xbp));
}
static int
xo_depth_check (xo_handle_t *xop, int depth)
{
xo_stack_t *xsp;
if (depth >= xop->xo_stack_size) {
depth += 16;
xsp = xo_realloc(xop->xo_stack, sizeof(xop->xo_stack[0]) * depth);
if (xsp == NULL) {
xo_failure(xop, "xo_depth_check: out of memory (%d)", depth);
return 0;
}
int count = depth - xop->xo_stack_size;
bzero(xsp + xop->xo_stack_size, count * sizeof(*xsp));
xop->xo_stack_size = depth;
xop->xo_stack = xsp;
}
return 0;
}
void
xo_no_setlocale (void)
{
xo_locale_inited = 1; /* Skip initialization */
}
/*
* We need to decide if stdout is line buffered (_IOLBF). Lacking a
* standard way to decide this (e.g. getlinebuf()), we have configure
* look to find __flbf, which glibc supported. If not, we'll rely
* on isatty, with the assumption that terminals are the only thing
* that's line buffered. We _could_ test for "steam._flags & _IOLBF",
* which is all __flbf does, but that's even tackier. Like a
* bedazzled Elvis outfit on an ugly lap dog sort of tacky. Not
* something we're willing to do.
*/
static int
xo_is_line_buffered (FILE *stream)
{
#if HAVE___FLBF
if (__flbf(stream))
return 1;
#else /* HAVE___FLBF */
if (isatty(fileno(stream)))
return 1;
#endif /* HAVE___FLBF */
return 0;
}
/*
* Initialize an xo_handle_t, using both static defaults and
* the global settings from the LIBXO_OPTIONS environment
* variable.
*/
static void
xo_init_handle (xo_handle_t *xop)
{
xop->xo_opaque = stdout;
xop->xo_write = xo_write_to_file;
xop->xo_flush = xo_flush_file;
if (xo_is_line_buffered(stdout))
xop->xo_flags |= XOF_FLUSH_LINE;
/*
* We need to initialize the locale, which isn't really pretty.
* Libraries should depend on their caller to set up the
* environment. But we really can't count on the caller to do
* this, because well, they won't. Trust me.
*/
if (!xo_locale_inited) {
xo_locale_inited = 1; /* Only do this once */
const char *cp = getenv("LC_CTYPE");
if (cp == NULL)
cp = getenv("LANG");
if (cp == NULL)
cp = getenv("LC_ALL");
if (cp == NULL)
cp = "UTF-8"; /* Optimistic? */
(void) setlocale(LC_CTYPE, cp);
}
/*
* Initialize only the xo_buffers we know we'll need; the others
* can be allocated as needed.
*/
xo_buf_init(&xop->xo_data);
xo_buf_init(&xop->xo_fmt);
xop->xo_indent_by = XO_INDENT_BY;
xo_depth_check(xop, XO_DEPTH);
#if !defined(NO_LIBXO_OPTIONS)
if (!(xop->xo_flags & XOF_NO_ENV)) {
char *env = getenv("LIBXO_OPTIONS");
if (env)
xo_set_options(xop, env);
}
#endif /* NO_GETENV */
}
/*
* Initialize the default handle.
*/
static void
xo_default_init (void)
{
xo_handle_t *xop = &xo_default_handle;
xo_init_handle(xop);
xo_default_inited = 1;
}
/*
* Does the buffer have room for the given number of bytes of data?
* If not, realloc the buffer to make room. If that fails, we
* return 0 to tell the caller they are in trouble.
*/
static int
xo_buf_has_room (xo_buffer_t *xbp, int len)
{
if (xbp->xb_curp + len >= xbp->xb_bufp + xbp->xb_size) {
int sz = xbp->xb_size + XO_BUFSIZ;
char *bp = xo_realloc(xbp->xb_bufp, sz);
if (bp == NULL) {
/*
* XXX If we wanted to put a stick XOF_ENOMEM on xop,
* this would be the place to do it. But we'd need
* to churn the code to pass xop in here....
*/
return 0;
}
xbp->xb_curp = bp + (xbp->xb_curp - xbp->xb_bufp);
xbp->xb_bufp = bp;
xbp->xb_size = sz;
}
return 1;
}
/*
* Cheap convenience function to return either the argument, or
* the internal handle, after it has been initialized. The usage
* is:
* xop = xo_default(xop);
*/
static xo_handle_t *
xo_default (xo_handle_t *xop)
{
if (xop == NULL) {
if (xo_default_inited == 0)
xo_default_init();
xop = &xo_default_handle;
}
return xop;
}
/*
* Return the number of spaces we should be indenting. If
* we are pretty-printing, theis is indent * indent_by.
*/
static int
xo_indent (xo_handle_t *xop)
{
int rc = 0;
xop = xo_default(xop);
if (xop->xo_flags & XOF_PRETTY) {
rc = xop->xo_indent * xop->xo_indent_by;
if (xop->xo_flags & XOF_TOP_EMITTED)
rc += xop->xo_indent_by;
}
return (rc > 0) ? rc : 0;
}
static void
xo_buf_indent (xo_handle_t *xop, int indent)
{
xo_buffer_t *xbp = &xop->xo_data;
if (indent <= 0)
indent = xo_indent(xop);
if (!xo_buf_has_room(xbp, indent))
return;
memset(xbp->xb_curp, ' ', indent);
xbp->xb_curp += indent;
}
static char xo_xml_amp[] = "&";
static char xo_xml_lt[] = "<";
static char xo_xml_gt[] = ">";
static char xo_xml_quot[] = """;
static int
xo_escape_xml (xo_buffer_t *xbp, int len, int attr)
{
int slen;
unsigned delta = 0;
char *cp, *ep, *ip;
const char *sp;
for (cp = xbp->xb_curp, ep = cp + len; cp < ep; cp++) {
/* We're subtracting 2: 1 for the NUL, 1 for the char we replace */
if (*cp == '<')
delta += sizeof(xo_xml_lt) - 2;
else if (*cp == '>')
delta += sizeof(xo_xml_gt) - 2;
else if (*cp == '&')
delta += sizeof(xo_xml_amp) - 2;
else if (attr && *cp == '"')
delta += sizeof(xo_xml_quot) - 2;
}
if (delta == 0) /* Nothing to escape; bail */
return len;
if (!xo_buf_has_room(xbp, delta)) /* No room; bail, but don't append */
return 0;
ep = xbp->xb_curp;
cp = ep + len;
ip = cp + delta;
do {
cp -= 1;
ip -= 1;
if (*cp == '<')
sp = xo_xml_lt;
else if (*cp == '>')
sp = xo_xml_gt;
else if (*cp == '&')
sp = xo_xml_amp;
else if (attr && *cp == '"')
sp = xo_xml_quot;
else {
*ip = *cp;
continue;
}
slen = strlen(sp);
ip -= slen - 1;
memcpy(ip, sp, slen);
} while (cp > ep && cp != ip);
return len + delta;
}
static int
xo_escape_json (xo_buffer_t *xbp, int len)
{
unsigned delta = 0;
char *cp, *ep, *ip;
for (cp = xbp->xb_curp, ep = cp + len; cp < ep; cp++) {
if (*cp == '\\' || *cp == '"')
delta += 1;
else if (*cp == '\n' || *cp == '\r')
delta += 1;
}
if (delta == 0) /* Nothing to escape; bail */
return len;
if (!xo_buf_has_room(xbp, delta)) /* No room; bail, but don't append */
return 0;
ep = xbp->xb_curp;
cp = ep + len;
ip = cp + delta;
do {
cp -= 1;
ip -= 1;
if (*cp == '\\' || *cp == '"') {
*ip-- = *cp;
*ip = '\\';
} else if (*cp == '\n') {
*ip-- = 'n';
*ip = '\\';
} else if (*cp == '\r') {
*ip-- = 'r';
*ip = '\\';
} else {
*ip = *cp;
}
} while (cp > ep && cp != ip);
return len + delta;
}
/*
* Append the given string to the given buffer
*/
static void
xo_buf_append (xo_buffer_t *xbp, const char *str, int len)
{
if (!xo_buf_has_room(xbp, len))
return;
memcpy(xbp->xb_curp, str, len);
xbp->xb_curp += len;
}
static void
xo_buf_escape (xo_handle_t *xop, xo_buffer_t *xbp,
const char *str, int len, xo_xff_flags_t flags)
{
if (!xo_buf_has_room(xbp, len))
return;
memcpy(xbp->xb_curp, str, len);
switch (xop->xo_style) {
case XO_STYLE_XML:
case XO_STYLE_HTML:
len = xo_escape_xml(xbp, len, (flags & XFF_ATTR));
break;
case XO_STYLE_JSON:
len = xo_escape_json(xbp, len);
break;
}
xbp->xb_curp += len;
}
/*
* Write the current contents of the data buffer using the handle's
* xo_write function.
*/
static int
xo_write (xo_handle_t *xop)
{
int rc = 0;
xo_buffer_t *xbp = &xop->xo_data;
if (xbp->xb_curp != xbp->xb_bufp) {
xo_buf_append(xbp, "", 1); /* Append ending NUL */
xo_anchor_clear(xop);
rc = xop->xo_write(xop->xo_opaque, xbp->xb_bufp);
xbp->xb_curp = xbp->xb_bufp;
}
/* Turn off the flags that don't survive across writes */
xop->xo_flags &= ~(XOF_UNITS_PENDING);
return rc;
}
/*
* Format arguments into our buffer. If a custom formatter has been set,
* we use that to do the work; otherwise we vsnprintf().
*/
static int
xo_vsnprintf (xo_handle_t *xop, xo_buffer_t *xbp, const char *fmt, va_list vap)
{
va_list va_local;
int rc;
int left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
va_copy(va_local, vap);
if (xop->xo_formatter)
rc = xop->xo_formatter(xop, xbp->xb_curp, left, fmt, va_local);
else
rc = vsnprintf(xbp->xb_curp, left, fmt, va_local);
if (rc > xbp->xb_size) {
if (!xo_buf_has_room(xbp, rc)) {
va_end(va_local);
return -1;
}
/*
* After we call vsnprintf(), the stage of vap is not defined.
* We need to copy it before we pass. Then we have to do our
* own logic below to move it along. This is because the
* implementation can have va_list be a point (bsd) or a
* structure (macosx) or anything in between.
*/
va_end(va_local); /* Reset vap to the start */
va_copy(va_local, vap);
left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
if (xop->xo_formatter)
xop->xo_formatter(xop, xbp->xb_curp, left, fmt, va_local);
else
rc = vsnprintf(xbp->xb_curp, left, fmt, va_local);
}
va_end(va_local);
return rc;
}
/*
* Print some data thru the handle.
*/
static int
xo_printf_v (xo_handle_t *xop, const char *fmt, va_list vap)
{
xo_buffer_t *xbp = &xop->xo_data;
int left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
int rc;
va_list va_local;
va_copy(va_local, vap);
rc = vsnprintf(xbp->xb_curp, left, fmt, va_local);
if (rc > xbp->xb_size) {
if (!xo_buf_has_room(xbp, rc)) {
va_end(va_local);
return -1;
}
va_end(va_local); /* Reset vap to the start */
va_copy(va_local, vap);
left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
rc = vsnprintf(xbp->xb_curp, left, fmt, va_local);
}
va_end(va_local);
if (rc > 0)
xbp->xb_curp += rc;
return rc;
}
static int
xo_printf (xo_handle_t *xop, const char *fmt, ...)
{
int rc;
va_list vap;
va_start(vap, fmt);
rc = xo_printf_v(xop, fmt, vap);
va_end(vap);
return rc;
}
/*
* These next few function are make The Essential UTF-8 Ginsu Knife.
* Identify an input and output character, and convert it.
*/
static int xo_utf8_bits[7] = { 0, 0x7f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
static int
xo_is_utf8 (char ch)
{
return (ch & 0x80);
}
static int
xo_utf8_to_wc_len (const char *buf)
{
unsigned b = (unsigned char) *buf;
int len;
if ((b & 0x80) == 0x0)
len = 1;
else if ((b & 0xe0) == 0xc0)
len = 2;
else if ((b & 0xf0) == 0xe0)
len = 3;
else if ((b & 0xf8) == 0xf0)
len = 4;
else if ((b & 0xfc) == 0xf8)
len = 5;
else if ((b & 0xfe) == 0xfc)
len = 6;
else
len = -1;
return len;
}
static int
xo_buf_utf8_len (xo_handle_t *xop, const char *buf, int bufsiz)
{
unsigned b = (unsigned char) *buf;
int len, i;
len = xo_utf8_to_wc_len(buf);
if (len == -1) {
xo_failure(xop, "invalid UTF-8 data: %02hhx", b);
return -1;
}
if (len > bufsiz) {
xo_failure(xop, "invalid UTF-8 data (short): %02hhx (%d/%d)",
b, len, bufsiz);
return -1;
}
for (i = 2; i < len; i++) {
b = (unsigned char ) buf[i];
if ((b & 0xc0) != 0x80) {
xo_failure(xop, "invalid UTF-8 data (byte %d): %x", i, b);
return -1;
}
}
return len;
}
/*
* Build a wide character from the input buffer; the number of
* bits we pull off the first character is dependent on the length,
* but we put 6 bits off all other bytes.
*/
static wchar_t
xo_utf8_char (const char *buf, int len)
{
int i;
wchar_t wc;
const unsigned char *cp = (const unsigned char *) buf;
wc = *cp & xo_utf8_bits[len];
for (i = 1; i < len; i++) {
wc <<= 6;
wc |= cp[i] & 0x3f;
if ((cp[i] & 0xc0) != 0x80)
return (wchar_t) -1;
}
return wc;
}
/*
* Determine the number of bytes needed to encode a wide character.
*/
static int
xo_utf8_emit_len (wchar_t wc)
{
int len;
if ((wc & ((1<<7) - 1)) == wc) /* Simple case */
len = 1;
else if ((wc & ((1<<11) - 1)) == wc)
len = 2;
else if ((wc & ((1<<16) - 1)) == wc)
len = 3;
else if ((wc & ((1<<21) - 1)) == wc)
len = 4;
else if ((wc & ((1<<26) - 1)) == wc)
len = 5;
else
len = 6;
return len;
}
static void
xo_utf8_emit_char (char *buf, int len, wchar_t wc)
{
int i;
if (len == 1) { /* Simple case */
buf[0] = wc & 0x7f;
return;
}
for (i = len - 1; i >= 0; i--) {
buf[i] = 0x80 | (wc & 0x3f);
wc >>= 6;
}
buf[0] &= xo_utf8_bits[len];
buf[0] |= ~xo_utf8_bits[len] << 1;
}
static int
xo_buf_append_locale_from_utf8 (xo_handle_t *xop, xo_buffer_t *xbp,
const char *ibuf, int ilen)
{
wchar_t wc;
int len;
/*
* Build our wide character from the input buffer; the number of
* bits we pull off the first character is dependent on the length,
* but we put 6 bits off all other bytes.
*/
wc = xo_utf8_char(ibuf, ilen);
if (wc == (wchar_t) -1) {
xo_failure(xop, "invalid utf-8 byte sequence");
return 0;
}
if (xop->xo_flags & XOF_NO_LOCALE) {
if (!xo_buf_has_room(xbp, ilen))
return 0;
memcpy(xbp->xb_curp, ibuf, ilen);
xbp->xb_curp += ilen;
} else {
if (!xo_buf_has_room(xbp, MB_LEN_MAX + 1))
return 0;
bzero(&xop->xo_mbstate, sizeof(xop->xo_mbstate));
len = wcrtomb(xbp->xb_curp, wc, &xop->xo_mbstate);
if (len <= 0) {
xo_failure(xop, "could not convert wide char: %lx",
(unsigned long) wc);
return 0;
}
xbp->xb_curp += len;
}
return wcwidth(wc);
}
static void
xo_buf_append_locale (xo_handle_t *xop, xo_buffer_t *xbp,
const char *cp, int len)
{
const char *sp = cp, *ep = cp + len;
unsigned save_off = xbp->xb_bufp - xbp->xb_curp;
int slen;
int cols = 0;
for ( ; cp < ep; cp++) {
if (!xo_is_utf8(*cp)) {
cols += 1;
continue;
}
/*
* We're looking at a non-ascii UTF-8 character.
* First we copy the previous data.
* Then we need find the length and validate it.
* Then we turn it into a wide string.
* Then we turn it into a localized string.
* Then we repeat. Isn't i18n fun?
*/
if (sp != cp)
xo_buf_append(xbp, sp, cp - sp); /* Append previous data */
slen = xo_buf_utf8_len(xop, cp, ep - cp);
if (slen <= 0) {
/* Bad data; back it all out */
xbp->xb_curp = xbp->xb_bufp + save_off;
return;
}
cols += xo_buf_append_locale_from_utf8(xop, xbp, cp, slen);
/* Next time thru, we'll start at the next character */
cp += slen - 1;
sp = cp + 1;
}
/* Update column values */
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += cols;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += cols;
/* Before we fall into the basic logic below, we need reset len */
len = ep - sp;
if (len != 0) /* Append trailing data */
xo_buf_append(xbp, sp, len);
}
/*
* Append the given string to the given buffer
*/
static void
xo_data_append (xo_handle_t *xop, const char *str, int len)
{
xo_buf_append(&xop->xo_data, str, len);
}
/*
* Append the given string to the given buffer
*/
static void
xo_data_escape (xo_handle_t *xop, const char *str, int len)
{
xo_buf_escape(xop, &xop->xo_data, str, len, 0);
}
/*
* Generate a warning. Normally, this is a text message written to
* standard error. If the XOF_WARN_XML flag is set, then we generate
* XMLified content on standard output.
*/
static void
xo_warn_hcv (xo_handle_t *xop, int code, int check_warn,
const char *fmt, va_list vap)
{
xop = xo_default(xop);
if (check_warn && !(xop->xo_flags & XOF_WARN))
return;
if (fmt == NULL)
return;
int len = strlen(fmt);
int plen = xo_program ? strlen(xo_program) : 0;
char *newfmt = alloca(len + 1 + plen + 2); /* NUL, and ": " */
if (plen) {
memcpy(newfmt, xo_program, plen);
newfmt[plen++] = ':';
newfmt[plen++] = ' ';
}
memcpy(newfmt + plen, fmt, len);
newfmt[len + plen] = '\0';
if (xop->xo_flags & XOF_WARN_XML) {
static char err_open[] = "<error>";
static char err_close[] = "</error>";
static char msg_open[] = "<message>";
static char msg_close[] = "</message>";
xo_buffer_t *xbp = &xop->xo_data;
xo_buf_append(xbp, err_open, sizeof(err_open) - 1);
xo_buf_append(xbp, msg_open, sizeof(msg_open) - 1);
va_list va_local;
va_copy(va_local, vap);
int left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
int rc = vsnprintf(xbp->xb_curp, left, newfmt, vap);
if (rc > xbp->xb_size) {
if (!xo_buf_has_room(xbp, rc)) {
va_end(va_local);
return;
}
va_end(vap); /* Reset vap to the start */
va_copy(vap, va_local);
left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
rc = vsnprintf(xbp->xb_curp, left, fmt, vap);
}
va_end(va_local);
rc = xo_escape_xml(xbp, rc, 1);
xbp->xb_curp += rc;
xo_buf_append(xbp, msg_close, sizeof(msg_close) - 1);
xo_buf_append(xbp, err_close, sizeof(err_close) - 1);
if (code >= 0) {
const char *msg = strerror(code);
if (msg) {
xo_buf_append(xbp, ": ", 2);
xo_buf_append(xbp, msg, strlen(msg));
}
}
xo_buf_append(xbp, "\n", 2); /* Append newline and NUL to string */
(void) xo_write(xop);
} else {
vfprintf(stderr, newfmt, vap);
if (code >= 0) {
const char *msg = strerror(code);
if (msg)
fprintf(stderr, ": %s", msg);
}
fprintf(stderr, "\n");
}
}
void
xo_warn_hc (xo_handle_t *xop, int code, const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(xop, code, 0, fmt, vap);
va_end(vap);
}
void
xo_warn_c (int code, const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(NULL, code, 0, fmt, vap);
va_end(vap);
}
void
xo_warn (const char *fmt, ...)
{
int code = errno;
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(NULL, code, 0, fmt, vap);
va_end(vap);
}
void
xo_warnx (const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(NULL, -1, 0, fmt, vap);
va_end(vap);
}
void
xo_err (int eval, const char *fmt, ...)
{
int code = errno;
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(NULL, code, 0, fmt, vap);
va_end(vap);
xo_finish();
exit(eval);
}
void
xo_errx (int eval, const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(NULL, -1, 0, fmt, vap);
va_end(vap);
xo_finish();
exit(eval);
}
void
xo_errc (int eval, int code, const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(NULL, code, 0, fmt, vap);
va_end(vap);
xo_finish();
exit(eval);
}
/*
* Generate a warning. Normally, this is a text message written to
* standard error. If the XOF_WARN_XML flag is set, then we generate
* XMLified content on standard output.
*/
void
xo_message_hcv (xo_handle_t *xop, int code, const char *fmt, va_list vap)
{
static char msg_open[] = "<message>";
static char msg_close[] = "</message>";
xo_buffer_t *xbp;
int rc;
va_list va_local;
xop = xo_default(xop);
if (fmt == NULL || *fmt == '\0')
return;
int need_nl = (fmt[strlen(fmt) - 1] != '\n');
switch (xop->xo_style) {
case XO_STYLE_XML:
xbp = &xop->xo_data;
if (xop->xo_flags & XOF_PRETTY)
xo_buf_indent(xop, xop->xo_indent_by);
xo_buf_append(xbp, msg_open, sizeof(msg_open) - 1);
va_copy(va_local, vap);
int left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
rc = vsnprintf(xbp->xb_curp, left, fmt, vap);
if (rc > xbp->xb_size) {
if (!xo_buf_has_room(xbp, rc)) {
va_end(va_local);
return;
}
va_end(vap); /* Reset vap to the start */
va_copy(vap, va_local);
left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
rc = vsnprintf(xbp->xb_curp, left, fmt, vap);
}
va_end(va_local);
rc = xo_escape_xml(xbp, rc, 1);
xbp->xb_curp += rc;
if (need_nl && code > 0) {
const char *msg = strerror(code);
if (msg) {
xo_buf_append(xbp, ": ", 2);
xo_buf_append(xbp, msg, strlen(msg));
}
}
xo_buf_append(xbp, msg_close, sizeof(msg_close) - 1);
if (need_nl)
xo_buf_append(xbp, "\n", 2); /* Append newline and NUL to string */
(void) xo_write(xop);
break;
case XO_STYLE_HTML:
{
char buf[BUFSIZ], *bp = buf, *cp;
int bufsiz = sizeof(buf);
int rc2;
va_copy(va_local, vap);
rc = vsnprintf(bp, bufsiz, fmt, va_local);
if (rc > bufsiz) {
bufsiz = rc + BUFSIZ;
bp = alloca(bufsiz);
va_end(va_local);
va_copy(va_local, vap);
rc = vsnprintf(bp, bufsiz, fmt, va_local);
}
va_end(va_local);
cp = bp + rc;
if (need_nl) {
rc2 = snprintf(cp, bufsiz - rc, "%s%s\n",
(code > 0) ? ": " : "",
(code > 0) ? strerror(code) : "");
if (rc2 > 0)
rc += rc2;
}
xo_buf_append_div(xop, "message", 0, NULL, 0, bp, rc, NULL, 0);
}
break;
case XO_STYLE_JSON:
/* No meanings of representing messages in JSON */
break;
case XO_STYLE_TEXT:
rc = xo_printf_v(xop, fmt, vap);
/*
* XXX need to handle UTF-8 widths
*/
if (rc > 0) {
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += rc;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += rc;
}
if (need_nl && code > 0) {
const char *msg = strerror(code);
if (msg) {
xo_printf(xop, ": %s", msg);
}
}
if (need_nl)
xo_printf(xop, "\n");
break;
}
(void) xo_flush_h(xop);
}
void
xo_message_hc (xo_handle_t *xop, int code, const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_message_hcv(xop, code, fmt, vap);
va_end(vap);
}
void
xo_message_c (int code, const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_message_hcv(NULL, code, fmt, vap);
va_end(vap);
}
void
xo_message (const char *fmt, ...)
{
int code = errno;
va_list vap;
va_start(vap, fmt);
xo_message_hcv(NULL, code, fmt, vap);
va_end(vap);
}
static void
xo_failure (xo_handle_t *xop, const char *fmt, ...)
{
if (!(xop->xo_flags & XOF_WARN))
return;
va_list vap;
va_start(vap, fmt);
xo_warn_hcv(xop, -1, 1, fmt, vap);
va_end(vap);
}
/**
* Create a handle for use by later libxo functions.
*
* Note: normal use of libxo does not require a distinct handle, since
* the default handle (used when NULL is passed) generates text on stdout.
*
* @style Style of output desired (XO_STYLE_* value)
* @flags Set of XOF_* flags in use with this handle
*/
xo_handle_t *
xo_create (xo_style_t style, xo_xof_flags_t flags)
{
xo_handle_t *xop = xo_realloc(NULL, sizeof(*xop));
if (xop) {
bzero(xop, sizeof(*xop));
xop->xo_style = style;
xop->xo_flags = flags;
xo_init_handle(xop);
}
return xop;
}
/**
* Create a handle that will write to the given file. Use
* the XOF_CLOSE_FP flag to have the file closed on xo_destroy().
* @fp FILE pointer to use
* @style Style of output desired (XO_STYLE_* value)
* @flags Set of XOF_* flags to use with this handle
*/
xo_handle_t *
xo_create_to_file (FILE *fp, xo_style_t style, xo_xof_flags_t flags)
{
xo_handle_t *xop = xo_create(style, flags);
if (xop) {
xop->xo_opaque = fp;
xop->xo_write = xo_write_to_file;
xop->xo_close = xo_close_file;
xop->xo_flush = xo_flush_file;
}
return xop;
}
/**
* Release any resources held by the handle.
* @xop XO handle to alter (or NULL for default handle)
*/
void
xo_destroy (xo_handle_t *xop_arg)
{
xo_handle_t *xop = xo_default(xop_arg);
if (xop->xo_close && (xop->xo_flags & XOF_CLOSE_FP))
xop->xo_close(xop->xo_opaque);
xo_free(xop->xo_stack);
xo_buf_cleanup(&xop->xo_data);
xo_buf_cleanup(&xop->xo_fmt);
xo_buf_cleanup(&xop->xo_predicate);
xo_buf_cleanup(&xop->xo_attrs);
if (xop_arg == NULL) {
bzero(&xo_default_handle, sizeof(xo_default_handle));
xo_default_inited = 0;
} else
xo_free(xop);
}
/**
* Record a new output style to use for the given handle (or default if
* handle is NULL). This output style will be used for any future output.
*
* @xop XO handle to alter (or NULL for default handle)
* @style new output style (XO_STYLE_*)
*/
void
xo_set_style (xo_handle_t *xop, xo_style_t style)
{
xop = xo_default(xop);
xop->xo_style = style;
}
xo_style_t
xo_get_style (xo_handle_t *xop)
{
xop = xo_default(xop);
return xop->xo_style;
}
static int
xo_name_to_style (const char *name)
{
if (strcmp(name, "xml") == 0)
return XO_STYLE_XML;
else if (strcmp(name, "json") == 0)
return XO_STYLE_JSON;
else if (strcmp(name, "text") == 0)
return XO_STYLE_TEXT;
else if (strcmp(name, "html") == 0)
return XO_STYLE_HTML;
return -1;
}
/*
* Convert string name to XOF_* flag value.
* Not all are useful. Or safe. Or sane.
*/
static unsigned
xo_name_to_flag (const char *name)
{
if (strcmp(name, "pretty") == 0)
return XOF_PRETTY;
if (strcmp(name, "warn") == 0)
return XOF_WARN;
if (strcmp(name, "xpath") == 0)
return XOF_XPATH;
if (strcmp(name, "info") == 0)
return XOF_INFO;
if (strcmp(name, "warn-xml") == 0)
return XOF_WARN_XML;
if (strcmp(name, "columns") == 0)
return XOF_COLUMNS;
if (strcmp(name, "dtrt") == 0)
return XOF_DTRT;
if (strcmp(name, "flush") == 0)
return XOF_FLUSH;
if (strcmp(name, "keys") == 0)
return XOF_KEYS;
if (strcmp(name, "ignore-close") == 0)
return XOF_IGNORE_CLOSE;
if (strcmp(name, "not-first") == 0)
return XOF_NOT_FIRST;
if (strcmp(name, "no-locale") == 0)
return XOF_NO_LOCALE;
if (strcmp(name, "no-top") == 0)
return XOF_NO_TOP;
if (strcmp(name, "units") == 0)
return XOF_UNITS;
if (strcmp(name, "underscores") == 0)
return XOF_UNDERSCORES;
return 0;
}
int
xo_set_style_name (xo_handle_t *xop, const char *name)
{
if (name == NULL)
return -1;
int style = xo_name_to_style(name);
if (style < 0)
return -1;
xo_set_style(xop, style);
return 0;
}
/*
* Set the options for a handle using a string of options
* passed in. The input is a comma-separated set of names
* and optional values: "xml,pretty,indent=4"
*/
int
xo_set_options (xo_handle_t *xop, const char *input)
{
char *cp, *ep, *vp, *np, *bp;
int style = -1, new_style, len, rc = 0;
xo_xof_flags_t new_flag;
if (input == NULL)
return 0;
xop = xo_default(xop);
/*
* We support a simpler, old-school style of giving option
* also, using a single character for each option. It's
* ideal for lazy people, such as myself.
*/
if (*input == ':') {
int sz;
for (input++ ; *input; input++) {
switch (*input) {
case 'f':
xop->xo_flags |= XOF_FLUSH;
break;
case 'F':
xop->xo_flags |= XOF_FLUSH_LINE;
break;
case 'H':
xop->xo_style = XO_STYLE_HTML;
break;
case 'I':
xop->xo_flags |= XOF_INFO;
break;
case 'i':
sz = strspn(input + 1, "0123456789");
if (sz > 0) {
xop->xo_indent_by = atoi(input + 1);
input += sz - 1; /* Skip value */
}
break;
case 'k':
xop->xo_flags |= XOF_KEYS;
break;
case 'J':
xop->xo_style = XO_STYLE_JSON;
break;
case 'P':
xop->xo_flags |= XOF_PRETTY;
break;
case 'T':
xop->xo_style = XO_STYLE_TEXT;
break;
case 'U':
xop->xo_flags |= XOF_UNITS;
break;
case 'u':
xop->xo_flags |= XOF_UNDERSCORES;
break;
case 'W':
xop->xo_flags |= XOF_WARN;
break;
case 'X':
xop->xo_style = XO_STYLE_XML;
break;
case 'x':
xop->xo_flags |= XOF_XPATH;
break;
}
}
return 0;
}
len = strlen(input) + 1;
bp = alloca(len);
memcpy(bp, input, len);
for (cp = bp, ep = cp + len - 1; cp && cp < ep; cp = np) {
np = strchr(cp, ',');
if (np)
*np++ = '\0';
vp = strchr(cp, '=');
if (vp)
*vp++ = '\0';
new_style = xo_name_to_style(cp);
if (new_style >= 0) {
if (style >= 0)
xo_warnx("ignoring multiple styles: '%s'", cp);
else
style = new_style;
} else {
new_flag = xo_name_to_flag(cp);
if (new_flag != 0)
xop->xo_flags |= new_flag;
else {
if (strcmp(cp, "indent") == 0) {
xop->xo_indent_by = atoi(vp);
} else {
xo_warnx("unknown option: '%s'", cp);
rc = -1;
}
}
}
}
if (style > 0)
xop->xo_style= style;
return rc;
}
/**
* Set one or more flags for a given handle (or default if handle is NULL).
* These flags will affect future output.
*
* @xop XO handle to alter (or NULL for default handle)
* @flags Flags to be set (XOF_*)
*/
void
xo_set_flags (xo_handle_t *xop, xo_xof_flags_t flags)
{
xop = xo_default(xop);
xop->xo_flags |= flags;
}
xo_xof_flags_t
xo_get_flags (xo_handle_t *xop)
{
xop = xo_default(xop);
return xop->xo_flags;
}
/**
* Record a leading prefix for the XPath we generate. This allows the
* generated data to be placed within an XML hierarchy but still have
* accurate XPath expressions.
*
* @xop XO handle to alter (or NULL for default handle)
* @path The XPath expression
*/
void
xo_set_leading_xpath (xo_handle_t *xop, const char *path)
{
xop = xo_default(xop);
if (xop->xo_leading_xpath) {
xo_free(xop->xo_leading_xpath);
xop->xo_leading_xpath = NULL;
}
if (path == NULL)
return;
int len = strlen(path);
xop->xo_leading_xpath = xo_realloc(NULL, len + 1);
if (xop->xo_leading_xpath) {
memcpy(xop->xo_leading_xpath, path, len + 1);
}
}
/**
* Record the info data for a set of tags
*
* @xop XO handle to alter (or NULL for default handle)
* @info Info data (xo_info_t) to be recorded (or NULL) (MUST BE SORTED)
* @count Number of entries in info (or -1 to count them ourselves)
*/
void
xo_set_info (xo_handle_t *xop, xo_info_t *infop, int count)
{
xop = xo_default(xop);
if (count < 0 && infop) {
xo_info_t *xip;
for (xip = infop, count = 0; xip->xi_name; xip++, count++)
continue;
}
xop->xo_info = infop;
xop->xo_info_count = count;
}
/**
* Set the formatter callback for a handle. The callback should
* return a newly formatting contents of a formatting instruction,
* meaning the bits inside the braces.
*/
void
xo_set_formatter (xo_handle_t *xop, xo_formatter_t func,
xo_checkpointer_t cfunc)
{
xop = xo_default(xop);
xop->xo_formatter = func;
xop->xo_checkpointer = cfunc;
}
/**
* Clear one or more flags for a given handle (or default if handle is NULL).
* These flags will affect future output.
*
* @xop XO handle to alter (or NULL for default handle)
* @flags Flags to be cleared (XOF_*)
*/
void
xo_clear_flags (xo_handle_t *xop, xo_xof_flags_t flags)
{
xop = xo_default(xop);
xop->xo_flags &= ~flags;
}
static const char *
xo_state_name (xo_state_t state)
{
static const char *names[] = {
"init",
"open_container",
"close_container",
"open_list",
"close_list",
"open_instance",
"close_instance",
"open_leaf_list",
"close_leaf_list",
"discarding",
"marker",
"emit",
"emit_leaf_list",
"finish",
NULL
};
if (state < (sizeof(names) / sizeof(names[0])))
return names[state];
return "unknown";
}
static void
xo_line_ensure_open (xo_handle_t *xop, xo_xff_flags_t flags UNUSED)
{
static char div_open[] = "<div class=\"line\">";
static char div_open_blank[] = "<div class=\"blank-line\">";
if (xop->xo_flags & XOF_DIV_OPEN)
return;
if (xop->xo_style != XO_STYLE_HTML)
return;
xop->xo_flags |= XOF_DIV_OPEN;
if (flags & XFF_BLANK_LINE)
xo_data_append(xop, div_open_blank, sizeof(div_open_blank) - 1);
else
xo_data_append(xop, div_open, sizeof(div_open) - 1);
if (xop->xo_flags & XOF_PRETTY)
xo_data_append(xop, "\n", 1);
}
static void
xo_line_close (xo_handle_t *xop)
{
static char div_close[] = "</div>";
switch (xop->xo_style) {
case XO_STYLE_HTML:
if (!(xop->xo_flags & XOF_DIV_OPEN))
xo_line_ensure_open(xop, 0);
xop->xo_flags &= ~XOF_DIV_OPEN;
xo_data_append(xop, div_close, sizeof(div_close) - 1);
if (xop->xo_flags & XOF_PRETTY)
xo_data_append(xop, "\n", 1);
break;
case XO_STYLE_TEXT:
xo_data_append(xop, "\n", 1);
break;
}
}
static int
xo_info_compare (const void *key, const void *data)
{
const char *name = key;
const xo_info_t *xip = data;
return strcmp(name, xip->xi_name);
}
static xo_info_t *
xo_info_find (xo_handle_t *xop, const char *name, int nlen)
{
xo_info_t *xip;
char *cp = alloca(nlen + 1); /* Need local copy for NUL termination */
memcpy(cp, name, nlen);
cp[nlen] = '\0';
xip = bsearch(cp, xop->xo_info, xop->xo_info_count,
sizeof(xop->xo_info[0]), xo_info_compare);
return xip;
}
#define CONVERT(_have, _need) (((_have) << 8) | (_need))
/*
* Check to see that the conversion is safe and sane.
*/
static int
xo_check_conversion (xo_handle_t *xop, int have_enc, int need_enc)
{
switch (CONVERT(have_enc, need_enc)) {
case CONVERT(XF_ENC_UTF8, XF_ENC_UTF8):
case CONVERT(XF_ENC_UTF8, XF_ENC_LOCALE):
case CONVERT(XF_ENC_WIDE, XF_ENC_UTF8):
case CONVERT(XF_ENC_WIDE, XF_ENC_LOCALE):
case CONVERT(XF_ENC_LOCALE, XF_ENC_LOCALE):
case CONVERT(XF_ENC_LOCALE, XF_ENC_UTF8):
return 0;
default:
xo_failure(xop, "invalid conversion (%c:%c)", have_enc, need_enc);
return 1;
}
}
static int
xo_format_string_direct (xo_handle_t *xop, xo_buffer_t *xbp,
xo_xff_flags_t flags,
const wchar_t *wcp, const char *cp, int len, int max,
int need_enc, int have_enc)
{
int cols = 0;
wchar_t wc = 0;
int ilen, olen, width;
int attr = (flags & XFF_ATTR);
const char *sp;
if (len > 0 && !xo_buf_has_room(xbp, len))
return 0;
for (;;) {
if (len == 0)
break;
if (cp) {
if (*cp == '\0')
break;
if ((flags & XFF_UNESCAPE) && (*cp == '\\' || *cp == '%')) {
cp += 1;
len -= 1;
}
}
if (wcp && *wcp == L'\0')
break;
ilen = 0;
switch (have_enc) {
case XF_ENC_WIDE: /* Wide character */
wc = *wcp++;
ilen = 1;
break;
case XF_ENC_UTF8: /* UTF-8 */
ilen = xo_utf8_to_wc_len(cp);
if (ilen < 0) {
xo_failure(xop, "invalid UTF-8 character: %02hhx", *cp);
return -1;
}
if (len > 0 && len < ilen) {
len = 0; /* Break out of the loop */
continue;
}
wc = xo_utf8_char(cp, ilen);
if (wc == (wchar_t) -1) {
xo_failure(xop, "invalid UTF-8 character: %02hhx/%d",
*cp, ilen);
return -1;
}
cp += ilen;
break;
case XF_ENC_LOCALE: /* Native locale */
ilen = (len > 0) ? len : MB_LEN_MAX;
ilen = mbrtowc(&wc, cp, ilen, &xop->xo_mbstate);
if (ilen < 0) { /* Invalid data; skip */
xo_failure(xop, "invalid mbs char: %02hhx", *cp);
continue;
}
if (ilen == 0) { /* Hit a wide NUL character */
len = 0;
continue;
}
cp += ilen;
break;
}
/* Reduce len, but not below zero */
if (len > 0) {
len -= ilen;
if (len < 0)
len = 0;
}
/*
* Find the width-in-columns of this character, which must be done
* in wide characters, since we lack a mbswidth() function. If
* it doesn't fit
*/
width = wcwidth(wc);
if (width < 0)
width = iswcntrl(wc) ? 0 : 1;
if (xop->xo_style == XO_STYLE_TEXT || xop->xo_style == XO_STYLE_HTML) {
if (max > 0 && cols + width > max)
break;
}
switch (need_enc) {
case XF_ENC_UTF8:
/* Output in UTF-8 needs to be escaped, based on the style */
switch (xop->xo_style) {
case XO_STYLE_XML:
case XO_STYLE_HTML:
if (wc == '<')
sp = xo_xml_lt;
else if (wc == '>')
sp = xo_xml_gt;
else if (wc == '&')
sp = xo_xml_amp;
else if (attr && wc == '"')
sp = xo_xml_quot;
else
break;
int slen = strlen(sp);
if (!xo_buf_has_room(xbp, slen - 1))
return -1;
memcpy(xbp->xb_curp, sp, slen);
xbp->xb_curp += slen;
goto done_with_encoding; /* Need multi-level 'break' */
case XO_STYLE_JSON:
if (wc != '\\' && wc != '"' && wc != '\n' && wc != '\r')
break;
if (!xo_buf_has_room(xbp, 2))
return -1;
*xbp->xb_curp++ = '\\';
if (wc == '\n')
wc = 'n';
else if (wc == '\r')
wc = 'r';
else wc = wc & 0x7f;
*xbp->xb_curp++ = wc;
goto done_with_encoding;
}
olen = xo_utf8_emit_len(wc);
if (olen < 0) {
xo_failure(xop, "ignoring bad length");
continue;
}
if (!xo_buf_has_room(xbp, olen))
return -1;
xo_utf8_emit_char(xbp->xb_curp, olen, wc);
xbp->xb_curp += olen;
break;
case XF_ENC_LOCALE:
if (!xo_buf_has_room(xbp, MB_LEN_MAX + 1))
return -1;
olen = wcrtomb(xbp->xb_curp, wc, &xop->xo_mbstate);
if (olen <= 0) {
xo_failure(xop, "could not convert wide char: %lx",
(unsigned long) wc);
olen = 1;
width = 1;
*xbp->xb_curp++ = '?';
} else
xbp->xb_curp += olen;
break;
}
done_with_encoding:
cols += width;
}
return cols;
}
static int
xo_format_string (xo_handle_t *xop, xo_buffer_t *xbp, xo_xff_flags_t flags,
xo_format_t *xfp)
{
static char null[] = "(null)";
char *cp = NULL;
wchar_t *wcp = NULL;
int len, cols = 0, rc = 0;
int off = xbp->xb_curp - xbp->xb_bufp, off2;
int need_enc = (xop->xo_style == XO_STYLE_TEXT)
? XF_ENC_LOCALE : XF_ENC_UTF8;
if (xo_check_conversion(xop, xfp->xf_enc, need_enc))
return 0;
len = xfp->xf_width[XF_WIDTH_SIZE];
if (xfp->xf_enc == XF_ENC_WIDE) {
wcp = va_arg(xop->xo_vap, wchar_t *);
if (xfp->xf_skip)
return 0;
/*
* Dont' deref NULL; use the traditional "(null)" instead
* of the more accurate "who's been a naughty boy, then?".
*/
if (wcp == NULL) {
cp = null;
len = sizeof(null) - 1;
}
} else {
cp = va_arg(xop->xo_vap, char *); /* UTF-8 or native */
if (xfp->xf_skip)
return 0;
/* Echo "Dont' deref NULL" logic */
if (cp == NULL) {
cp = null;
len = sizeof(null) - 1;
}
/*
* Optimize the most common case, which is "%s". We just
* need to copy the complete string to the output buffer.
*/
if (xfp->xf_enc == need_enc
&& xfp->xf_width[XF_WIDTH_MIN] < 0
&& xfp->xf_width[XF_WIDTH_SIZE] < 0
&& xfp->xf_width[XF_WIDTH_MAX] < 0
&& !(xop->xo_flags & (XOF_ANCHOR | XOF_COLUMNS))) {
len = strlen(cp);
xo_buf_escape(xop, xbp, cp, len, flags);
/*
* Our caller expects xb_curp left untouched, so we have
* to reset it and return the number of bytes written to
* the buffer.
*/
off2 = xbp->xb_curp - xbp->xb_bufp;
rc = off2 - off;
xbp->xb_curp = xbp->xb_bufp + off;
return rc;
}
}
cols = xo_format_string_direct(xop, xbp, flags, wcp, cp, len,
xfp->xf_width[XF_WIDTH_MAX],
need_enc, xfp->xf_enc);
if (cols < 0)
goto bail;
/*
* xo_buf_append* will move xb_curp, so we save/restore it.
*/
off2 = xbp->xb_curp - xbp->xb_bufp;
rc = off2 - off;
xbp->xb_curp = xbp->xb_bufp + off;
if (cols < xfp->xf_width[XF_WIDTH_MIN]) {
/*
* Find the number of columns needed to display the string.
* If we have the original wide string, we just call wcswidth,
* but if we did the work ourselves, then we need to do it.
*/
int delta = xfp->xf_width[XF_WIDTH_MIN] - cols;
if (!xo_buf_has_room(xbp, delta))
goto bail;
/*
* If seen_minus, then pad on the right; otherwise move it so
* we can pad on the left.
*/
if (xfp->xf_seen_minus) {
cp = xbp->xb_curp + rc;
} else {
cp = xbp->xb_curp;
memmove(xbp->xb_curp + delta, xbp->xb_curp, rc);
}
/* Set the padding */
memset(cp, (xfp->xf_leading_zero > 0) ? '0' : ' ', delta);
rc += delta;
cols += delta;
}
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += cols;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += cols;
return rc;
bail:
xbp->xb_curp = xbp->xb_bufp + off;
return 0;
}
static void
xo_data_append_content (xo_handle_t *xop, const char *str, int len)
{
int cols;
int need_enc = (xop->xo_style == XO_STYLE_TEXT)
? XF_ENC_LOCALE : XF_ENC_UTF8;
cols = xo_format_string_direct(xop, &xop->xo_data, XFF_UNESCAPE,
NULL, str, len, -1,
need_enc, XF_ENC_UTF8);
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += cols;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += cols;
}
static void
xo_bump_width (xo_format_t *xfp, int digit)
{
int *ip = &xfp->xf_width[xfp->xf_dots];
*ip = ((*ip > 0) ? *ip : 0) * 10 + digit;
}
static int
xo_trim_ws (xo_buffer_t *xbp, int len)
{
char *cp, *sp, *ep;
int delta;
/* First trim leading space */
for (cp = sp = xbp->xb_curp, ep = cp + len; cp < ep; cp++) {
if (*cp != ' ')
break;
}
delta = cp - sp;
if (delta) {
len -= delta;
memmove(sp, cp, len);
}
/* Then trim off the end */
for (cp = xbp->xb_curp, sp = ep = cp + len; cp < ep; ep--) {
if (ep[-1] != ' ')
break;
}
delta = sp - ep;
if (delta) {
len -= delta;
cp[len] = '\0';
}
return len;
}
static int
xo_format_data (xo_handle_t *xop, xo_buffer_t *xbp,
const char *fmt, int flen, xo_xff_flags_t flags)
{
xo_format_t xf;
const char *cp, *ep, *sp, *xp = NULL;
int rc, cols;
int style = (flags & XFF_XML) ? XO_STYLE_XML : xop->xo_style;
unsigned make_output = !(flags & XFF_NO_OUTPUT);
int need_enc = (xop->xo_style == XO_STYLE_TEXT)
? XF_ENC_LOCALE : XF_ENC_UTF8;
if (xbp == NULL)
xbp = &xop->xo_data;
for (cp = fmt, ep = fmt + flen; cp < ep; cp++) {
if (*cp != '%') {
add_one:
if (xp == NULL)
xp = cp;
if (*cp == '\\' && cp[1] != '\0')
cp += 1;
continue;
} if (cp + 1 < ep && cp[1] == '%') {
cp += 1;
goto add_one;
}
if (xp) {
if (make_output) {
cols = xo_format_string_direct(xop, xbp, flags | XFF_UNESCAPE,
NULL, xp, cp - xp, -1,
need_enc, XF_ENC_UTF8);
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += cols;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += cols;
}
xp = NULL;
}
bzero(&xf, sizeof(xf));
xf.xf_leading_zero = -1;
xf.xf_width[0] = xf.xf_width[1] = xf.xf_width[2] = -1;
/*
* "%@" starts an XO-specific set of flags:
* @X@ - XML-only field; ignored if style isn't XML
*/
if (cp[1] == '@') {
for (cp += 2; cp < ep; cp++) {
if (*cp == '@') {
break;
}
if (*cp == '*') {
/*
* '*' means there's a "%*.*s" value in vap that
* we want to ignore
*/
if (!(xop->xo_flags & XOF_NO_VA_ARG))
va_arg(xop->xo_vap, int);
}
}
}
/* Hidden fields are only visible to JSON and XML */
if (xop->xo_flags & XFF_ENCODE_ONLY) {
if (style != XO_STYLE_XML
&& xop->xo_style != XO_STYLE_JSON)
xf.xf_skip = 1;
} else if (xop->xo_flags & XFF_DISPLAY_ONLY) {
if (style != XO_STYLE_TEXT
&& xop->xo_style != XO_STYLE_HTML)
xf.xf_skip = 1;
}
if (!make_output)
xf.xf_skip = 1;
/*
* Looking at one piece of a format; find the end and
* call snprintf. Then advance xo_vap on our own.
*
* Note that 'n', 'v', and '$' are not supported.
*/
sp = cp; /* Save start pointer */
for (cp += 1; cp < ep; cp++) {
if (*cp == 'l')
xf.xf_lflag += 1;
else if (*cp == 'h')
xf.xf_hflag += 1;
else if (*cp == 'j')
xf.xf_jflag += 1;
else if (*cp == 't')
xf.xf_tflag += 1;
else if (*cp == 'z')
xf.xf_zflag += 1;
else if (*cp == 'q')
xf.xf_qflag += 1;
else if (*cp == '.') {
if (++xf.xf_dots >= XF_WIDTH_NUM) {
xo_failure(xop, "Too many dots in format: '%s'", fmt);
return -1;
}
} else if (*cp == '-')
xf.xf_seen_minus = 1;
else if (isdigit((int) *cp)) {
if (xf.xf_leading_zero < 0)
xf.xf_leading_zero = (*cp == '0');
xo_bump_width(&xf, *cp - '0');
} else if (*cp == '*') {
xf.xf_stars += 1;
xf.xf_star[xf.xf_dots] = 1;
} else if (strchr("diouxXDOUeEfFgGaAcCsSp", *cp) != NULL)
break;
else if (*cp == 'n' || *cp == 'v') {
xo_failure(xop, "unsupported format: '%s'", fmt);
return -1;
}
}
if (cp == ep)
xo_failure(xop, "field format missing format character: %s",
fmt);
xf.xf_fc = *cp;
if (!(xop->xo_flags & XOF_NO_VA_ARG)) {
if (*cp == 's' || *cp == 'S') {
/* Handle "%*.*.*s" */
int s;
for (s = 0; s < XF_WIDTH_NUM; s++) {
if (xf.xf_star[s]) {
xf.xf_width[s] = va_arg(xop->xo_vap, int);
/* Normalize a negative width value */
if (xf.xf_width[s] < 0) {
if (s == 0) {
xf.xf_width[0] = -xf.xf_width[0];
xf.xf_seen_minus = 1;
} else
xf.xf_width[s] = -1; /* Ignore negative values */
}
}
}
}
}
/* If no max is given, it defaults to size */
if (xf.xf_width[XF_WIDTH_MAX] < 0 && xf.xf_width[XF_WIDTH_SIZE] >= 0)
xf.xf_width[XF_WIDTH_MAX] = xf.xf_width[XF_WIDTH_SIZE];
if (xf.xf_fc == 'D' || xf.xf_fc == 'O' || xf.xf_fc == 'U')
xf.xf_lflag = 1;
if (!xf.xf_skip) {
xo_buffer_t *fbp = &xop->xo_fmt;
int len = cp - sp + 1;
if (!xo_buf_has_room(fbp, len + 1))
return -1;
char *newfmt = fbp->xb_curp;
memcpy(newfmt, sp, len);
newfmt[0] = '%'; /* If we skipped over a "%@...@s" format */
newfmt[len] = '\0';
/*
* Bad news: our strings are UTF-8, but the stock printf
* functions won't handle field widths for wide characters
* correctly. So we have to handle this ourselves.
*/
if (xop->xo_formatter == NULL
&& (xf.xf_fc == 's' || xf.xf_fc == 'S')) {
xf.xf_enc = (xf.xf_lflag || (xf.xf_fc == 'S'))
? XF_ENC_WIDE : xf.xf_hflag ? XF_ENC_LOCALE : XF_ENC_UTF8;
rc = xo_format_string(xop, xbp, flags, &xf);
if ((flags & XFF_TRIM_WS)
&& (xop->xo_style == XO_STYLE_XML
|| xop->xo_style == XO_STYLE_JSON))
rc = xo_trim_ws(xbp, rc);
} else {
int columns = rc = xo_vsnprintf(xop, xbp, newfmt, xop->xo_vap);
/*
* For XML and HTML, we need "&<>" processing; for JSON,
* it's quotes. Text gets nothing.
*/
switch (style) {
case XO_STYLE_XML:
if (flags & XFF_TRIM_WS)
columns = rc = xo_trim_ws(xbp, rc);
/* fall thru */
case XO_STYLE_HTML:
rc = xo_escape_xml(xbp, rc, (flags & XFF_ATTR));
break;
case XO_STYLE_JSON:
if (flags & XFF_TRIM_WS)
columns = rc = xo_trim_ws(xbp, rc);
rc = xo_escape_json(xbp, rc);
break;
}
/*
* We can assume all the data we've added is ASCII, so
* the columns and bytes are the same. xo_format_string
* handles all the fancy string conversions and updates
* xo_anchor_columns accordingly.
*/
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += columns;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += columns;
}
xbp->xb_curp += rc;
}
/*
* Now for the tricky part: we need to move the argument pointer
* along by the amount needed.
*/
if (!(xop->xo_flags & XOF_NO_VA_ARG)) {
if (xf.xf_fc == 's' ||xf.xf_fc == 'S') {
/*
* The 'S' and 's' formats are normally handled in
* xo_format_string, but if we skipped it, then we
* need to pop it.
*/
if (xf.xf_skip)
va_arg(xop->xo_vap, char *);
} else {
int s;
for (s = 0; s < XF_WIDTH_NUM; s++) {
if (xf.xf_star[s])
va_arg(xop->xo_vap, int);
}
if (strchr("diouxXDOU", xf.xf_fc) != NULL) {
if (xf.xf_hflag > 1) {
va_arg(xop->xo_vap, int);
} else if (xf.xf_hflag > 0) {
va_arg(xop->xo_vap, int);
} else if (xf.xf_lflag > 1) {
va_arg(xop->xo_vap, unsigned long long);
} else if (xf.xf_lflag > 0) {
va_arg(xop->xo_vap, unsigned long);
} else if (xf.xf_jflag > 0) {
va_arg(xop->xo_vap, intmax_t);
} else if (xf.xf_tflag > 0) {
va_arg(xop->xo_vap, ptrdiff_t);
} else if (xf.xf_zflag > 0) {
va_arg(xop->xo_vap, size_t);
} else if (xf.xf_qflag > 0) {
va_arg(xop->xo_vap, quad_t);
} else {
va_arg(xop->xo_vap, int);
}
} else if (strchr("eEfFgGaA", xf.xf_fc) != NULL)
if (xf.xf_lflag)
va_arg(xop->xo_vap, long double);
else
va_arg(xop->xo_vap, double);
else if (xf.xf_fc == 'C' || (xf.xf_fc == 'c' && xf.xf_lflag))
va_arg(xop->xo_vap, wint_t);
else if (xf.xf_fc == 'c')
va_arg(xop->xo_vap, int);
else if (xf.xf_fc == 'p')
va_arg(xop->xo_vap, void *);
}
}
}
if (xp) {
if (make_output) {
cols = xo_format_string_direct(xop, xbp, flags | XFF_UNESCAPE,
NULL, xp, cp - xp, -1,
need_enc, XF_ENC_UTF8);
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += cols;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += cols;
}
xp = NULL;
}
return 0;
}
static char *
xo_fix_encoding (xo_handle_t *xop UNUSED, char *encoding)
{
char *cp = encoding;
if (cp[0] != '%' || !isdigit((int) cp[1]))
return encoding;
for (cp += 2; *cp; cp++) {
if (!isdigit((int) *cp))
break;
}
cp -= 1;
*cp = '%';
return cp;
}
static void
xo_buf_append_div (xo_handle_t *xop, const char *class, xo_xff_flags_t flags,
const char *name, int nlen,
const char *value, int vlen,
const char *encoding, int elen)
{
static char div_start[] = "<div class=\"";
static char div_tag[] = "\" data-tag=\"";
static char div_xpath[] = "\" data-xpath=\"";
static char div_key[] = "\" data-key=\"key";
static char div_end[] = "\">";
static char div_close[] = "</div>";
/*
* To build our XPath predicate, we need to save the va_list before
* we format our data, and then restore it before we format the
* xpath expression.
* Display-only keys implies that we've got an encode-only key
* elsewhere, so we don't use them from making predicates.
*/
int need_predidate =
(name && (flags & XFF_KEY) && !(flags & XFF_DISPLAY_ONLY)
&& (xop->xo_flags & XOF_XPATH));
if (need_predidate) {
va_list va_local;
va_copy(va_local, xop->xo_vap);
if (xop->xo_checkpointer)
xop->xo_checkpointer(xop, xop->xo_vap, 0);
/*
* Build an XPath predicate expression to match this key.
* We use the format buffer.
*/
xo_buffer_t *pbp = &xop->xo_predicate;
pbp->xb_curp = pbp->xb_bufp; /* Restart buffer */
xo_buf_append(pbp, "[", 1);
xo_buf_escape(xop, pbp, name, nlen, 0);
if (xop->xo_flags & XOF_PRETTY)
xo_buf_append(pbp, " = '", 4);
else
xo_buf_append(pbp, "='", 2);
/* The encoding format defaults to the normal format */
if (encoding == NULL) {
char *enc = alloca(vlen + 1);
memcpy(enc, value, vlen);
enc[vlen] = '\0';
encoding = xo_fix_encoding(xop, enc);
elen = strlen(encoding);
}
xo_format_data(xop, pbp, encoding, elen, XFF_XML | XFF_ATTR);
xo_buf_append(pbp, "']", 2);
/* Now we record this predicate expression in the stack */
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
int olen = xsp->xs_keys ? strlen(xsp->xs_keys) : 0;
int dlen = pbp->xb_curp - pbp->xb_bufp;
char *cp = xo_realloc(xsp->xs_keys, olen + dlen + 1);
if (cp) {
memcpy(cp + olen, pbp->xb_bufp, dlen);
cp[olen + dlen] = '\0';
xsp->xs_keys = cp;
}
/* Now we reset the xo_vap as if we were never here */
va_end(xop->xo_vap);
va_copy(xop->xo_vap, va_local);
va_end(va_local);
if (xop->xo_checkpointer)
xop->xo_checkpointer(xop, xop->xo_vap, 1);
}
if (flags & XFF_ENCODE_ONLY) {
/*
* Even if this is encode-only, we need to go thru the
* work of formatting it to make sure the args are cleared
* from xo_vap.
*/
xo_format_data(xop, &xop->xo_data, encoding, elen,
flags | XFF_NO_OUTPUT);
return;
}
xo_line_ensure_open(xop, 0);
if (xop->xo_flags & XOF_PRETTY)
xo_buf_indent(xop, xop->xo_indent_by);
xo_data_append(xop, div_start, sizeof(div_start) - 1);
xo_data_append(xop, class, strlen(class));
if (name) {
xo_data_append(xop, div_tag, sizeof(div_tag) - 1);
xo_data_escape(xop, name, nlen);
/*
* Save the offset at which we'd place units. See xo_format_units.
*/
if (xop->xo_flags & XOF_UNITS) {
xop->xo_flags |= XOF_UNITS_PENDING;
/*
* Note: We need the '+1' here because we know we've not
* added the closing quote. We add one, knowing the quote
* will be added shortly.
*/
xop->xo_units_offset =
xop->xo_data.xb_curp -xop->xo_data.xb_bufp + 1;
}
}
if (name) {
if (xop->xo_flags & XOF_XPATH) {
int i;
xo_stack_t *xsp;
xo_data_append(xop, div_xpath, sizeof(div_xpath) - 1);
if (xop->xo_leading_xpath)
xo_data_append(xop, xop->xo_leading_xpath,
strlen(xop->xo_leading_xpath));
for (i = 0; i <= xop->xo_depth; i++) {
xsp = &xop->xo_stack[i];
if (xsp->xs_name == NULL)
continue;
/*
* XSS_OPEN_LIST and XSS_OPEN_LEAF_LIST stack frames
* are directly under XSS_OPEN_INSTANCE frames so we
* don't need to put these in our XPath expressions.
*/
if (xsp->xs_state == XSS_OPEN_LIST
|| xsp->xs_state == XSS_OPEN_LEAF_LIST)
continue;
xo_data_append(xop, "/", 1);
xo_data_escape(xop, xsp->xs_name, strlen(xsp->xs_name));
if (xsp->xs_keys) {
/* Don't show keys for the key field */
if (i != xop->xo_depth || !(flags & XFF_KEY))
xo_data_append(xop, xsp->xs_keys, strlen(xsp->xs_keys));
}
}
xo_data_append(xop, "/", 1);
xo_data_escape(xop, name, nlen);
}
if ((xop->xo_flags & XOF_INFO) && xop->xo_info) {
static char in_type[] = "\" data-type=\"";
static char in_help[] = "\" data-help=\"";
xo_info_t *xip = xo_info_find(xop, name, nlen);
if (xip) {
if (xip->xi_type) {
xo_data_append(xop, in_type, sizeof(in_type) - 1);
xo_data_escape(xop, xip->xi_type, strlen(xip->xi_type));
}
if (xip->xi_help) {
xo_data_append(xop, in_help, sizeof(in_help) - 1);
xo_data_escape(xop, xip->xi_help, strlen(xip->xi_help));
}
}
}
if ((flags & XFF_KEY) && (xop->xo_flags & XOF_KEYS))
xo_data_append(xop, div_key, sizeof(div_key) - 1);
}
xo_data_append(xop, div_end, sizeof(div_end) - 1);
xo_format_data(xop, NULL, value, vlen, 0);
xo_data_append(xop, div_close, sizeof(div_close) - 1);
if (xop->xo_flags & XOF_PRETTY)
xo_data_append(xop, "\n", 1);
}
static void
xo_format_text (xo_handle_t *xop, const char *str, int len)
{
switch (xop->xo_style) {
case XO_STYLE_TEXT:
xo_buf_append_locale(xop, &xop->xo_data, str, len);
break;
case XO_STYLE_HTML:
xo_buf_append_div(xop, "text", 0, NULL, 0, str, len, NULL, 0);
break;
}
}
static void
xo_format_title (xo_handle_t *xop, const char *str, int len,
const char *fmt, int flen)
{
static char div_open[] = "<div class=\"title\">";
static char div_close[] = "</div>";
if (flen == 0) {
fmt = "%s";
flen = 2;
}
switch (xop->xo_style) {
case XO_STYLE_XML:
case XO_STYLE_JSON:
/*
* Even though we don't care about text, we need to do
* enough parsing work to skip over the right bits of xo_vap.
*/
if (len == 0)
xo_format_data(xop, NULL, fmt, flen, XFF_NO_OUTPUT);
return;
}
xo_buffer_t *xbp = &xop->xo_data;
int start = xbp->xb_curp - xbp->xb_bufp;
int left = xbp->xb_size - start;
int rc;
int need_enc = XF_ENC_LOCALE;
if (xop->xo_style == XO_STYLE_HTML) {
need_enc = XF_ENC_UTF8;
xo_line_ensure_open(xop, 0);
if (xop->xo_flags & XOF_PRETTY)
xo_buf_indent(xop, xop->xo_indent_by);
xo_buf_append(&xop->xo_data, div_open, sizeof(div_open) - 1);
}
start = xbp->xb_curp - xbp->xb_bufp; /* Reset start */
if (len) {
char *newfmt = alloca(flen + 1);
memcpy(newfmt, fmt, flen);
newfmt[flen] = '\0';
/* If len is non-zero, the format string apply to the name */
char *newstr = alloca(len + 1);
memcpy(newstr, str, len);
newstr[len] = '\0';
if (newstr[len - 1] == 's') {
int cols;
char *bp;
rc = snprintf(NULL, 0, newfmt, newstr);
if (rc > 0) {
/*
* We have to do this the hard way, since we might need
* the columns.
*/
bp = alloca(rc + 1);
rc = snprintf(bp, rc + 1, newfmt, newstr);
cols = xo_format_string_direct(xop, xbp, 0, NULL, bp, rc, -1,
need_enc, XF_ENC_UTF8);
if (cols > 0) {
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += cols;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += cols;
}
}
goto move_along;
} else {
rc = snprintf(xbp->xb_curp, left, newfmt, newstr);
if (rc > left) {
if (!xo_buf_has_room(xbp, rc))
return;
left = xbp->xb_size - (xbp->xb_curp - xbp->xb_bufp);
rc = snprintf(xbp->xb_curp, left, newfmt, newstr);
}
if (rc > 0) {
if (xop->xo_flags & XOF_COLUMNS)
xop->xo_columns += rc;
if (xop->xo_flags & XOF_ANCHOR)
xop->xo_anchor_columns += rc;
}
}
} else {
xo_format_data(xop, NULL, fmt, flen, 0);
/* xo_format_data moved curp, so we need to reset it */
rc = xbp->xb_curp - (xbp->xb_bufp + start);
xbp->xb_curp = xbp->xb_bufp + start;
}
/* If we're styling HTML, then we need to escape it */
if (xop->xo_style == XO_STYLE_HTML) {
rc = xo_escape_xml(xbp, rc, 0);
}
if (rc > 0)
xbp->xb_curp += rc;
move_along:
if (xop->xo_style == XO_STYLE_HTML) {
xo_data_append(xop, div_close, sizeof(div_close) - 1);
if (xop->xo_flags & XOF_PRETTY)
xo_data_append(xop, "\n", 1);
}
}
static void
xo_format_prep (xo_handle_t *xop, xo_xff_flags_t flags)
{
if (xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST) {
xo_data_append(xop, ",", 1);
if (!(flags & XFF_LEAF_LIST) && (xop->xo_flags & XOF_PRETTY))
xo_data_append(xop, "\n", 1);
} else
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
}
#if 0
/* Useful debugging function */
void
xo_arg (xo_handle_t *xop);
void
xo_arg (xo_handle_t *xop)
{
xop = xo_default(xop);
fprintf(stderr, "0x%x", va_arg(xop->xo_vap, unsigned));
}
#endif /* 0 */
static void
xo_format_value (xo_handle_t *xop, const char *name, int nlen,
const char *format, int flen,
const char *encoding, int elen, xo_xff_flags_t flags)
{
int pretty = (xop->xo_flags & XOF_PRETTY);
int quote;
xo_buffer_t *xbp;
/*
* Before we emit a value, we need to know that the frame is ready.
*/
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
if (flags & XFF_LEAF_LIST) {
/*
* Check if we've already started to emit normal leafs
* or if we're not in a leaf list.
*/
if ((xsp->xs_flags & (XSF_EMIT | XSF_EMIT_KEY))
|| !(xsp->xs_flags & XSF_EMIT_LEAF_LIST)) {
char nbuf[nlen + 1];
memcpy(nbuf, name, nlen);
nbuf[nlen] = '\0';
int rc = xo_transition(xop, 0, nbuf, XSS_EMIT_LEAF_LIST);
if (rc < 0)
flags |= XFF_DISPLAY_ONLY | XFF_ENCODE_ONLY;
else
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_EMIT_LEAF_LIST;
}
xsp = &xop->xo_stack[xop->xo_depth];
if (xsp->xs_name) {
name = xsp->xs_name;
nlen = strlen(name);
}
} else if (flags & XFF_KEY) {
/* Emitting a 'k' (key) field */
if ((xsp->xs_flags & XSF_EMIT) && !(flags & XFF_DISPLAY_ONLY)) {
xo_failure(xop, "key field emitted after normal value field: '%.*s'",
nlen, name);
} else if (!(xsp->xs_flags & XSF_EMIT_KEY)) {
char nbuf[nlen + 1];
memcpy(nbuf, name, nlen);
nbuf[nlen] = '\0';
int rc = xo_transition(xop, 0, nbuf, XSS_EMIT);
if (rc < 0)
flags |= XFF_DISPLAY_ONLY | XFF_ENCODE_ONLY;
else
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_EMIT_KEY;
xsp = &xop->xo_stack[xop->xo_depth];
xsp->xs_flags |= XSF_EMIT_KEY;
}
} else {
/* Emitting a normal value field */
if ((xsp->xs_flags & XSF_EMIT_LEAF_LIST)
|| !(xsp->xs_flags & XSF_EMIT)) {
char nbuf[nlen + 1];
memcpy(nbuf, name, nlen);
nbuf[nlen] = '\0';
int rc = xo_transition(xop, 0, nbuf, XSS_EMIT);
if (rc < 0)
flags |= XFF_DISPLAY_ONLY | XFF_ENCODE_ONLY;
else
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_EMIT;
xsp = &xop->xo_stack[xop->xo_depth];
xsp->xs_flags |= XSF_EMIT;
}
}
switch (xop->xo_style) {
case XO_STYLE_TEXT:
if (flags & XFF_ENCODE_ONLY)
flags |= XFF_NO_OUTPUT;
xo_format_data(xop, NULL, format, flen, flags);
break;
case XO_STYLE_HTML:
if (flags & XFF_ENCODE_ONLY)
flags |= XFF_NO_OUTPUT;
xo_buf_append_div(xop, "data", flags, name, nlen,
format, flen, encoding, elen);
break;
case XO_STYLE_XML:
/*
* Even though we're not making output, we still need to
* let the formatting code handle the va_arg popping.
*/
if (flags & XFF_DISPLAY_ONLY) {
flags |= XFF_NO_OUTPUT;
xo_format_data(xop, NULL, format, flen, flags);
break;
}
if (encoding) {
format = encoding;
flen = elen;
} else {
char *enc = alloca(flen + 1);
memcpy(enc, format, flen);
enc[flen] = '\0';
format = xo_fix_encoding(xop, enc);
flen = strlen(format);
}
if (nlen == 0) {
static char missing[] = "missing-field-name";
xo_failure(xop, "missing field name: %s", format);
name = missing;
nlen = sizeof(missing) - 1;
}
if (pretty)
xo_buf_indent(xop, -1);
xo_data_append(xop, "<", 1);
xo_data_escape(xop, name, nlen);
if (xop->xo_attrs.xb_curp != xop->xo_attrs.xb_bufp) {
xo_data_append(xop, xop->xo_attrs.xb_bufp,
xop->xo_attrs.xb_curp - xop->xo_attrs.xb_bufp);
xop->xo_attrs.xb_curp = xop->xo_attrs.xb_bufp;
}
/*
* We indicate 'key' fields using the 'key' attribute. While
* this is really committing the crime of mixing meta-data with
* data, it's often useful. Especially when format meta-data is
* difficult to come by.
*/
if ((flags & XFF_KEY) && (xop->xo_flags & XOF_KEYS)) {
static char attr[] = " key=\"key\"";
xo_data_append(xop, attr, sizeof(attr) - 1);
}
/*
* Save the offset at which we'd place units. See xo_format_units.
*/
if (xop->xo_flags & XOF_UNITS) {
xop->xo_flags |= XOF_UNITS_PENDING;
xop->xo_units_offset = xop->xo_data.xb_curp -xop->xo_data.xb_bufp;
}
xo_data_append(xop, ">", 1);
xo_format_data(xop, NULL, format, flen, flags);
xo_data_append(xop, "</", 2);
xo_data_escape(xop, name, nlen);
xo_data_append(xop, ">", 1);
if (pretty)
xo_data_append(xop, "\n", 1);
break;
case XO_STYLE_JSON:
if (flags & XFF_DISPLAY_ONLY) {
flags |= XFF_NO_OUTPUT;
xo_format_data(xop, NULL, format, flen, flags);
break;
}
if (encoding) {
format = encoding;
flen = elen;
} else {
char *enc = alloca(flen + 1);
memcpy(enc, format, flen);
enc[flen] = '\0';
format = xo_fix_encoding(xop, enc);
flen = strlen(format);
}
int first = !(xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST);
xo_format_prep(xop, flags);
if (flags & XFF_QUOTE)
quote = 1;
else if (flags & XFF_NOQUOTE)
quote = 0;
else if (flen == 0) {
quote = 0;
format = "true"; /* JSON encodes empty tags as a boolean true */
flen = 4;
} else if (strchr("diouxXDOUeEfFgGaAcCp", format[flen - 1]) == NULL)
quote = 1;
else
quote = 0;
if (nlen == 0) {
static char missing[] = "missing-field-name";
xo_failure(xop, "missing field name: %s", format);
name = missing;
nlen = sizeof(missing) - 1;
}
if (flags & XFF_LEAF_LIST) {
if (first && pretty)
xo_buf_indent(xop, -1);
} else {
if (pretty)
xo_buf_indent(xop, -1);
xo_data_append(xop, "\"", 1);
xbp = &xop->xo_data;
int off = xbp->xb_curp - xbp->xb_bufp;
xo_data_escape(xop, name, nlen);
if (xop->xo_flags & XOF_UNDERSCORES) {
int now = xbp->xb_curp - xbp->xb_bufp;
for ( ; off < now; off++)
if (xbp->xb_bufp[off] == '-')
xbp->xb_bufp[off] = '_';
}
xo_data_append(xop, "\":", 2);
}
if (pretty)
xo_data_append(xop, " ", 1);
if (quote)
xo_data_append(xop, "\"", 1);
xo_format_data(xop, NULL, format, flen, flags);
if (quote)
xo_data_append(xop, "\"", 1);
break;
}
}
static void
xo_format_content (xo_handle_t *xop, const char *class_name,
const char *xml_tag, int display_only,
const char *str, int len, const char *fmt, int flen)
{
switch (xop->xo_style) {
case XO_STYLE_TEXT:
if (len) {
xo_data_append_content(xop, str, len);
} else
xo_format_data(xop, NULL, fmt, flen, 0);
break;
case XO_STYLE_HTML:
if (len == 0) {
str = fmt;
len = flen;
}
xo_buf_append_div(xop, class_name, 0, NULL, 0, str, len, NULL, 0);
break;
case XO_STYLE_XML:
if (xml_tag) {
if (len == 0) {
str = fmt;
len = flen;
}
xo_open_container_h(xop, xml_tag);
xo_format_value(xop, "message", 7, str, len, NULL, 0, 0);
xo_close_container_h(xop, xml_tag);
} else {
/*
* Even though we don't care about labels, we need to do
* enough parsing work to skip over the right bits of xo_vap.
*/
if (len == 0)
xo_format_data(xop, NULL, fmt, flen, XFF_NO_OUTPUT);
}
break;
case XO_STYLE_JSON:
/*
* Even though we don't care about labels, we need to do
* enough parsing work to skip over the right bits of xo_vap.
*/
if (display_only) {
if (len == 0)
xo_format_data(xop, NULL, fmt, flen, XFF_NO_OUTPUT);
break;
}
/* XXX need schem for representing errors in JSON */
break;
}
}
static void
xo_format_units (xo_handle_t *xop, const char *str, int len,
const char *fmt, int flen)
{
static char units_start_xml[] = " units=\"";
static char units_start_html[] = " data-units=\"";
if (!(xop->xo_flags & XOF_UNITS_PENDING)) {
xo_format_content(xop, "units", NULL, 1, str, len, fmt, flen);
return;
}
xo_buffer_t *xbp = &xop->xo_data;
int start = xop->xo_units_offset;
int stop = xbp->xb_curp - xbp->xb_bufp;
if (xop->xo_style == XO_STYLE_XML)
xo_buf_append(xbp, units_start_xml, sizeof(units_start_xml) - 1);
else if (xop->xo_style == XO_STYLE_HTML)
xo_buf_append(xbp, units_start_html, sizeof(units_start_html) - 1);
else
return;
if (len)
xo_data_append(xop, str, len);
else
xo_format_data(xop, NULL, fmt, flen, 0);
xo_buf_append(xbp, "\"", 1);
int now = xbp->xb_curp - xbp->xb_bufp;
int delta = now - stop;
if (delta < 0) { /* Strange; no output to move */
xbp->xb_curp = xbp->xb_bufp + stop; /* Reset buffer to prior state */
return;
}
/*
* Now we're in it alright. We've need to insert the unit value
* we just created into the right spot. We make a local copy,
* move it and then insert our copy. We know there's room in the
* buffer, since we're just moving this around.
*/
char *buf = alloca(delta);
memcpy(buf, xbp->xb_bufp + stop, delta);
memmove(xbp->xb_bufp + start + delta, xbp->xb_bufp + start, stop - start);
memmove(xbp->xb_bufp + start, buf, delta);
}
static int
xo_find_width (xo_handle_t *xop, const char *str, int len,
const char *fmt, int flen)
{
long width = 0;
char *bp;
char *cp;
if (len) {
bp = alloca(len + 1); /* Make local NUL-terminated copy of str */
memcpy(bp, str, len);
bp[len] = '\0';
width = strtol(bp, &cp, 0);
if (width == LONG_MIN || width == LONG_MAX
|| bp == cp || *cp != '\0' ) {
width = 0;
xo_failure(xop, "invalid width for anchor: '%s'", bp);
}
} else if (flen) {
if (flen != 2 || strncmp("%d", fmt, flen) != 0)
xo_failure(xop, "invalid width format: '%*.*s'", flen, flen, fmt);
if (!(xop->xo_flags & XOF_NO_VA_ARG))
width = va_arg(xop->xo_vap, int);
}
return width;
}
static void
xo_anchor_clear (xo_handle_t *xop)
{
xop->xo_flags &= ~XOF_ANCHOR;
xop->xo_anchor_offset = 0;
xop->xo_anchor_columns = 0;
xop->xo_anchor_min_width = 0;
}
/*
* An anchor is a marker used to delay field width implications.
* Imagine the format string "{[:10}{min:%d}/{cur:%d}/{max:%d}{:]}".
* We are looking for output like " 1/4/5"
*
* To make this work, we record the anchor and then return to
* format it when the end anchor tag is seen.
*/
static void
xo_anchor_start (xo_handle_t *xop, const char *str, int len,
const char *fmt, int flen)
{
if (xop->xo_style != XO_STYLE_TEXT && xop->xo_style != XO_STYLE_HTML)
return;
if (xop->xo_flags & XOF_ANCHOR)
xo_failure(xop, "the anchor already recording is discarded");
xop->xo_flags |= XOF_ANCHOR;
xo_buffer_t *xbp = &xop->xo_data;
xop->xo_anchor_offset = xbp->xb_curp - xbp->xb_bufp;
xop->xo_anchor_columns = 0;
/*
* Now we find the width, if possible. If it's not there,
* we'll get it on the end anchor.
*/
xop->xo_anchor_min_width = xo_find_width(xop, str, len, fmt, flen);
}
static void
xo_anchor_stop (xo_handle_t *xop, const char *str, int len,
const char *fmt, int flen)
{
if (xop->xo_style != XO_STYLE_TEXT && xop->xo_style != XO_STYLE_HTML)
return;
if (!(xop->xo_flags & XOF_ANCHOR)) {
xo_failure(xop, "no start anchor");
return;
}
xop->xo_flags &= ~XOF_UNITS_PENDING;
int width = xo_find_width(xop, str, len, fmt, flen);
if (width == 0)
width = xop->xo_anchor_min_width;
if (width == 0) /* No width given; nothing to do */
goto done;
xo_buffer_t *xbp = &xop->xo_data;
int start = xop->xo_anchor_offset;
int stop = xbp->xb_curp - xbp->xb_bufp;
int abswidth = (width > 0) ? width : -width;
int blen = abswidth - xop->xo_anchor_columns;
if (blen <= 0) /* Already over width */
goto done;
if (abswidth > XO_MAX_ANCHOR_WIDTH) {
xo_failure(xop, "width over %u are not supported",
XO_MAX_ANCHOR_WIDTH);
goto done;
}
/* Make a suitable padding field and emit it */
char *buf = alloca(blen);
memset(buf, ' ', blen);
xo_format_content(xop, "padding", NULL, 1, buf, blen, NULL, 0);
if (width < 0) /* Already left justified */
goto done;
int now = xbp->xb_curp - xbp->xb_bufp;
int delta = now - stop;
if (delta < 0) /* Strange; no output to move */
goto done;
/*
* Now we're in it alright. We've need to insert the padding data
* we just created (which might be an HTML <div> or text) before
* the formatted data. We make a local copy, move it and then
* insert our copy. We know there's room in the buffer, since
* we're just moving this around.
*/
if (delta > blen)
buf = alloca(delta); /* Expand buffer if needed */
memcpy(buf, xbp->xb_bufp + stop, delta);
memmove(xbp->xb_bufp + start + delta, xbp->xb_bufp + start, stop - start);
memmove(xbp->xb_bufp + start, buf, delta);
done:
xo_anchor_clear(xop);
}
static int
xo_do_emit (xo_handle_t *xop, const char *fmt)
{
int rc = 0;
const char *cp, *sp, *ep, *basep;
char *newp = NULL;
int flush = (xop->xo_flags & XOF_FLUSH) ? 1 : 0;
int flush_line = (xop->xo_flags & XOF_FLUSH_LINE) ? 1 : 0;
xop->xo_columns = 0; /* Always reset it */
for (cp = fmt; *cp; ) {
if (*cp == '\n') {
xo_line_close(xop);
if (flush_line && xo_flush_h(xop) < 0)
return -1;
cp += 1;
continue;
} else if (*cp == '{') {
if (cp[1] == '{') { /* Start of {{escaped braces}} */
cp += 2; /* Skip over _both_ characters */
for (sp = cp; *sp; sp++) {
if (*sp == '}' && sp[1] == '}')
break;
}
if (*sp == '\0') {
xo_failure(xop, "missing closing '}}': %s", fmt);
return -1;
}
xo_format_text(xop, cp, sp - cp);
/* Move along the string, but don't run off the end */
if (*sp == '}' && sp[1] == '}')
sp += 2;
cp = *sp ? sp + 1 : sp;
continue;
}
/* Else fall thru to the code below */
} else {
/* Normal text */
for (sp = cp; *sp; sp++) {
if (*sp == '{' || *sp == '\n')
break;
}
xo_format_text(xop, cp, sp - cp);
cp = sp;
continue;
}
basep = cp + 1;
/*
* We are looking at the start of a field definition. The format is:
* '{' modifiers ':' content [ '/' print-fmt [ '/' encode-fmt ]] '}'
* Modifiers are optional and include the following field types:
* 'D': decoration; something non-text and non-data (colons, commmas)
* 'E': error message
* 'L': label; text preceding data
* 'N': note; text following data
* 'P': padding; whitespace
* 'T': Title, where 'content' is a column title
* 'U': Units, where 'content' is the unit label
* 'V': value, where 'content' is the name of the field (the default)
* 'W': warning message
* '[': start a section of anchored text
* ']': end a section of anchored text
* The following flags are also supported:
* 'c': flag: emit a colon after the label
* 'd': field is only emitted for display formats (text and html)
* 'e': field is only emitted for encoding formats (xml and json)
* 'k': this field is a key, suitable for XPath predicates
* 'l': a leaf-list, a simple list of values
* 'n': no quotes around this field
* 'q': add quotes around this field
* 't': trim whitespace around the value
* 'w': emit a blank after the label
* The print-fmt and encode-fmt strings is the printf-style formating
* for this data. JSON and XML will use the encoding-fmt, if present.
* If the encode-fmt is not provided, it defaults to the print-fmt.
* If the print-fmt is not provided, it defaults to 's'.
*/
unsigned ftype = 0, flags = 0;
const char *content = NULL, *format = NULL, *encoding = NULL;
int clen = 0, flen = 0, elen = 0;
for (sp = basep; sp; sp++) {
if (*sp == ':' || *sp == '/' || *sp == '}')
break;
if (*sp == '\\') {
if (sp[1] == '\0') {
xo_failure(xop, "backslash at the end of string");
return -1;
}
sp += 1;
continue;
}
switch (*sp) {
case 'D':
case 'E':
case 'L':
case 'N':
case 'P':
case 'T':
case 'U':
case 'V':
case 'W':
case '[':
case ']':
if (ftype != 0) {
xo_failure(xop, "field descriptor uses multiple types: %s",
fmt);
return -1;
}
ftype = *sp;
break;
case 'c':
flags |= XFF_COLON;
break;
case 'd':
flags |= XFF_DISPLAY_ONLY;
break;
case 'e':
flags |= XFF_ENCODE_ONLY;
break;
case 'k':
flags |= XFF_KEY;
break;
case 'l':
flags |= XFF_LEAF_LIST;
break;
case 'n':
flags |= XFF_NOQUOTE;
break;
case 'q':
flags |= XFF_QUOTE;
break;
case 't':
flags |= XFF_TRIM_WS;
break;
case 'w':
flags |= XFF_WS;
break;
default:
xo_failure(xop, "field descriptor uses unknown modifier: %s",
fmt);
/*
* No good answer here; a bad format will likely
* mean a core file. We just return and hope
* the caller notices there's no output, and while
* that seems, well, bad. There's nothing better.
*/
return -1;
}
}
if (*sp == ':') {
for (ep = ++sp; *sp; sp++) {
if (*sp == '}' || *sp == '/')
break;
if (*sp == '\\') {
if (sp[1] == '\0') {
xo_failure(xop, "backslash at the end of string");
return -1;
}
sp += 1;
continue;
}
}
if (ep != sp) {
clen = sp - ep;
content = ep;
}
} else {
xo_failure(xop, "missing content (':'): %s", fmt);
return -1;
}
if (*sp == '/') {
for (ep = ++sp; *sp; sp++) {
if (*sp == '}' || *sp == '/')
break;
if (*sp == '\\') {
if (sp[1] == '\0') {
xo_failure(xop, "backslash at the end of string");
return -1;
}
sp += 1;
continue;
}
}
flen = sp - ep;
format = ep;
}
if (*sp == '/') {
for (ep = ++sp; *sp; sp++) {
if (*sp == '}')
break;
}
elen = sp - ep;
encoding = ep;
}
if (*sp == '}') {
sp += 1;
} else {
xo_failure(xop, "missing closing '}': %s", fmt);
return -1;
}
if (ftype == 0 || ftype == 'V') {
if (format == NULL) {
/* Default format for value fields is '%s' */
format = "%s";
flen = 2;
}
xo_format_value(xop, content, clen, format, flen,
encoding, elen, flags);
} else if (ftype == '[')
xo_anchor_start(xop, content, clen, format, flen);
else if (ftype == ']')
xo_anchor_stop(xop, content, clen, format, flen);
else if (clen || format) { /* Need either content or format */
if (format == NULL) {
/* Default format for value fields is '%s' */
format = "%s";
flen = 2;
}
if (ftype == 'D')
xo_format_content(xop, "decoration", NULL, 1,
content, clen, format, flen);
else if (ftype == 'E')
xo_format_content(xop, "error", "error", 0,
content, clen, format, flen);
else if (ftype == 'L')
xo_format_content(xop, "label", NULL, 1,
content, clen, format, flen);
else if (ftype == 'N')
xo_format_content(xop, "note", NULL, 1,
content, clen, format, flen);
else if (ftype == 'P')
xo_format_content(xop, "padding", NULL, 1,
content, clen, format, flen);
else if (ftype == 'T')
xo_format_title(xop, content, clen, format, flen);
else if (ftype == 'U') {
if (flags & XFF_WS)
xo_format_content(xop, "padding", NULL, 1, " ", 1, NULL, 0);
xo_format_units(xop, content, clen, format, flen);
} else if (ftype == 'W')
xo_format_content(xop, "warning", "warning", 0,
content, clen, format, flen);
}
if (flags & XFF_COLON)
xo_format_content(xop, "decoration", NULL, 1, ":", 1, NULL, 0);
if (ftype != 'U' && (flags & XFF_WS))
xo_format_content(xop, "padding", NULL, 1, " ", 1, NULL, 0);
cp += sp - basep + 1;
if (newp) {
xo_free(newp);
newp = NULL;
}
}
/* If we don't have an anchor, write the text out */
if (flush && !(xop->xo_flags & XOF_ANCHOR)) {
if (xo_write(xop) < 0)
rc = -1; /* Report failure */
else if (xop->xo_flush && xop->xo_flush(xop->xo_opaque) < 0)
rc = -1;
}
return (rc < 0) ? rc : (int) xop->xo_columns;
}
int
xo_emit_hv (xo_handle_t *xop, const char *fmt, va_list vap)
{
int rc;
xop = xo_default(xop);
va_copy(xop->xo_vap, vap);
rc = xo_do_emit(xop, fmt);
va_end(xop->xo_vap);
bzero(&xop->xo_vap, sizeof(xop->xo_vap));
return rc;
}
int
xo_emit_h (xo_handle_t *xop, const char *fmt, ...)
{
int rc;
xop = xo_default(xop);
va_start(xop->xo_vap, fmt);
rc = xo_do_emit(xop, fmt);
va_end(xop->xo_vap);
bzero(&xop->xo_vap, sizeof(xop->xo_vap));
return rc;
}
int
xo_emit (const char *fmt, ...)
{
xo_handle_t *xop = xo_default(NULL);
int rc;
va_start(xop->xo_vap, fmt);
rc = xo_do_emit(xop, fmt);
va_end(xop->xo_vap);
bzero(&xop->xo_vap, sizeof(xop->xo_vap));
return rc;
}
int
xo_attr_hv (xo_handle_t *xop, const char *name, const char *fmt, va_list vap)
{
const int extra = 5; /* space, equals, quote, quote, and nul */
xop = xo_default(xop);
if (xop->xo_style != XO_STYLE_XML)
return 0;
int nlen = strlen(name);
xo_buffer_t *xbp = &xop->xo_attrs;
if (!xo_buf_has_room(xbp, nlen + extra))
return -1;
*xbp->xb_curp++ = ' ';
memcpy(xbp->xb_curp, name, nlen);
xbp->xb_curp += nlen;
*xbp->xb_curp++ = '=';
*xbp->xb_curp++ = '"';
int rc = xo_vsnprintf(xop, xbp, fmt, vap);
if (rc > 0) {
rc = xo_escape_xml(xbp, rc, 1);
xbp->xb_curp += rc;
}
if (!xo_buf_has_room(xbp, 2))
return -1;
*xbp->xb_curp++ = '"';
*xbp->xb_curp = '\0';
return rc + nlen + extra;
}
int
xo_attr_h (xo_handle_t *xop, const char *name, const char *fmt, ...)
{
int rc;
va_list vap;
va_start(vap, fmt);
rc = xo_attr_hv(xop, name, fmt, vap);
va_end(vap);
return rc;
}
int
xo_attr (const char *name, const char *fmt, ...)
{
int rc;
va_list vap;
va_start(vap, fmt);
rc = xo_attr_hv(NULL, name, fmt, vap);
va_end(vap);
return rc;
}
static void
xo_stack_set_flags (xo_handle_t *xop)
{
if (xop->xo_flags & XOF_NOT_FIRST) {
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
xsp->xs_flags |= XSF_NOT_FIRST;
xop->xo_flags &= ~XOF_NOT_FIRST;
}
}
static void
xo_depth_change (xo_handle_t *xop, const char *name,
int delta, int indent, xo_state_t state, xo_xsf_flags_t flags)
{
if (xop->xo_style == XO_STYLE_HTML || xop->xo_style == XO_STYLE_TEXT)
indent = 0;
if (xop->xo_flags & XOF_DTRT)
flags |= XSF_DTRT;
if (delta >= 0) { /* Push operation */
if (xo_depth_check(xop, xop->xo_depth + delta))
return;
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth + delta];
xsp->xs_flags = flags;
xsp->xs_state = state;
xo_stack_set_flags(xop);
if (name == NULL)
name = XO_FAILURE_NAME;
int len = strlen(name) + 1;
char *cp = xo_realloc(NULL, len);
if (cp) {
memcpy(cp, name, len);
xsp->xs_name = cp;
}
} else { /* Pop operation */
if (xop->xo_depth == 0) {
if (!(xop->xo_flags & XOF_IGNORE_CLOSE))
xo_failure(xop, "close with empty stack: '%s'", name);
return;
}
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
if (xop->xo_flags & XOF_WARN) {
const char *top = xsp->xs_name;
if (top && strcmp(name, top) != 0) {
xo_failure(xop, "incorrect close: '%s' .vs. '%s'",
name, top);
return;
}
if ((xsp->xs_flags & XSF_LIST) != (flags & XSF_LIST)) {
xo_failure(xop, "list close on list confict: '%s'",
name);
return;
}
if ((xsp->xs_flags & XSF_INSTANCE) != (flags & XSF_INSTANCE)) {
xo_failure(xop, "list close on instance confict: '%s'",
name);
return;
}
}
if (xsp->xs_name) {
xo_free(xsp->xs_name);
xsp->xs_name = NULL;
}
if (xsp->xs_keys) {
xo_free(xsp->xs_keys);
xsp->xs_keys = NULL;
}
}
xop->xo_depth += delta; /* Record new depth */
xop->xo_indent += indent;
}
void
xo_set_depth (xo_handle_t *xop, int depth)
{
xop = xo_default(xop);
if (xo_depth_check(xop, depth))
return;
xop->xo_depth += depth;
xop->xo_indent += depth;
}
static xo_xsf_flags_t
xo_stack_flags (unsigned xflags)
{
if (xflags & XOF_DTRT)
return XSF_DTRT;
return 0;
}
static int
xo_do_open_container (xo_handle_t *xop, xo_xof_flags_t flags, const char *name)
{
int rc = 0;
const char *ppn = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
const char *pre_nl = "";
if (name == NULL) {
xo_failure(xop, "NULL passed for container name");
name = XO_FAILURE_NAME;
}
flags |= xop->xo_flags; /* Pick up handle flags */
switch (xop->xo_style) {
case XO_STYLE_XML:
rc = xo_printf(xop, "%*s<%s", xo_indent(xop), "", name);
if (xop->xo_attrs.xb_curp != xop->xo_attrs.xb_bufp) {
rc += xop->xo_attrs.xb_curp - xop->xo_attrs.xb_bufp;
xo_data_append(xop, xop->xo_attrs.xb_bufp,
xop->xo_attrs.xb_curp - xop->xo_attrs.xb_bufp);
xop->xo_attrs.xb_curp = xop->xo_attrs.xb_bufp;
}
rc += xo_printf(xop, ">%s", ppn);
break;
case XO_STYLE_JSON:
xo_stack_set_flags(xop);
if (!(xop->xo_flags & XOF_NO_TOP)) {
if (!(xop->xo_flags & XOF_TOP_EMITTED)) {
xo_printf(xop, "%*s{%s", xo_indent(xop), "", ppn);
xop->xo_flags |= XOF_TOP_EMITTED;
}
}
if (xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST)
pre_nl = (xop->xo_flags & XOF_PRETTY) ? ",\n" : ", ";
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
rc = xo_printf(xop, "%s%*s\"%s\": {%s",
pre_nl, xo_indent(xop), "", name, ppn);
break;
}
xo_depth_change(xop, name, 1, 1, XSS_OPEN_CONTAINER,
xo_stack_flags(flags));
return rc;
}
static int
xo_open_container_hf (xo_handle_t *xop, xo_xof_flags_t flags, const char *name)
{
return xo_transition(xop, flags, name, XSS_OPEN_CONTAINER);
}
int
xo_open_container_h (xo_handle_t *xop, const char *name)
{
return xo_open_container_hf(xop, 0, name);
}
int
xo_open_container (const char *name)
{
return xo_open_container_hf(NULL, 0, name);
}
int
xo_open_container_hd (xo_handle_t *xop, const char *name)
{
return xo_open_container_hf(xop, XOF_DTRT, name);
}
int
xo_open_container_d (const char *name)
{
return xo_open_container_hf(NULL, XOF_DTRT, name);
}
static int
xo_do_close_container (xo_handle_t *xop, const char *name)
{
xop = xo_default(xop);
int rc = 0;
const char *ppn = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
const char *pre_nl = "";
if (name == NULL) {
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
name = xsp->xs_name;
if (name) {
int len = strlen(name) + 1;
/* We need to make a local copy; xo_depth_change will free it */
char *cp = alloca(len);
memcpy(cp, name, len);
name = cp;
} else if (!(xsp->xs_flags & XSF_DTRT)) {
xo_failure(xop, "missing name without 'dtrt' mode");
name = XO_FAILURE_NAME;
}
}
switch (xop->xo_style) {
case XO_STYLE_XML:
xo_depth_change(xop, name, -1, -1, XSS_CLOSE_CONTAINER, 0);
rc = xo_printf(xop, "%*s</%s>%s", xo_indent(xop), "", name, ppn);
break;
case XO_STYLE_JSON:
pre_nl = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
ppn = (xop->xo_depth <= 1) ? "\n" : "";
xo_depth_change(xop, name, -1, -1, XSS_CLOSE_CONTAINER, 0);
rc = xo_printf(xop, "%s%*s}%s", pre_nl, xo_indent(xop), "", ppn);
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
break;
case XO_STYLE_HTML:
case XO_STYLE_TEXT:
xo_depth_change(xop, name, -1, 0, XSS_CLOSE_CONTAINER, 0);
break;
}
return rc;
}
int
xo_close_container_h (xo_handle_t *xop, const char *name)
{
return xo_transition(xop, 0, name, XSS_CLOSE_CONTAINER);
}
int
xo_close_container (const char *name)
{
return xo_close_container_h(NULL, name);
}
int
xo_close_container_hd (xo_handle_t *xop)
{
return xo_close_container_h(xop, NULL);
}
int
xo_close_container_d (void)
{
return xo_close_container_h(NULL, NULL);
}
static int
xo_do_open_list (xo_handle_t *xop, xo_xsf_flags_t flags, const char *name)
{
int rc = 0;
int indent = 0;
xop = xo_default(xop);
if (xop->xo_style == XO_STYLE_JSON) {
const char *ppn = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
const char *pre_nl = "";
indent = 1;
if (!(xop->xo_flags & XOF_NO_TOP)) {
if (!(xop->xo_flags & XOF_TOP_EMITTED)) {
xo_printf(xop, "%*s{%s", xo_indent(xop), "", ppn);
xop->xo_flags |= XOF_TOP_EMITTED;
}
}
if (name == NULL) {
xo_failure(xop, "NULL passed for list name");
name = XO_FAILURE_NAME;
}
xo_stack_set_flags(xop);
if (xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST)
pre_nl = (xop->xo_flags & XOF_PRETTY) ? ",\n" : ", ";
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
rc = xo_printf(xop, "%s%*s\"%s\": [%s",
pre_nl, xo_indent(xop), "", name, ppn);
}
xo_depth_change(xop, name, 1, indent, XSS_OPEN_LIST,
XSF_LIST | xo_stack_flags(flags));
return rc;
}
static int
xo_open_list_hf (xo_handle_t *xop, xo_xsf_flags_t flags, const char *name)
{
return xo_transition(xop, flags, name, XSS_OPEN_LIST);
}
int
xo_open_list_h (xo_handle_t *xop, const char *name UNUSED)
{
return xo_open_list_hf(xop, 0, name);
}
int
xo_open_list (const char *name)
{
return xo_open_list_hf(NULL, 0, name);
}
int
xo_open_list_hd (xo_handle_t *xop, const char *name UNUSED)
{
return xo_open_list_hf(xop, XOF_DTRT, name);
}
int
xo_open_list_d (const char *name)
{
return xo_open_list_hf(NULL, XOF_DTRT, name);
}
static int
xo_do_close_list (xo_handle_t *xop, const char *name)
{
int rc = 0;
const char *pre_nl = "";
if (name == NULL) {
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
name = xsp->xs_name;
if (name) {
int len = strlen(name) + 1;
/* We need to make a local copy; xo_depth_change will free it */
char *cp = alloca(len);
memcpy(cp, name, len);
name = cp;
} else if (!(xsp->xs_flags & XSF_DTRT)) {
xo_failure(xop, "missing name without 'dtrt' mode");
name = XO_FAILURE_NAME;
}
}
if (xop->xo_style == XO_STYLE_JSON) {
if (xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST)
pre_nl = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
xo_depth_change(xop, name, -1, -1, XSS_CLOSE_LIST, XSF_LIST);
rc = xo_printf(xop, "%s%*s]", pre_nl, xo_indent(xop), "");
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
} else {
xo_depth_change(xop, name, -1, 0, XSS_CLOSE_LIST, XSF_LIST);
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
}
return rc;
}
int
xo_close_list_h (xo_handle_t *xop, const char *name)
{
return xo_transition(xop, 0, name, XSS_CLOSE_LIST);
}
int
xo_close_list (const char *name)
{
return xo_close_list_h(NULL, name);
}
int
xo_close_list_hd (xo_handle_t *xop)
{
return xo_close_list_h(xop, NULL);
}
int
xo_close_list_d (void)
{
return xo_close_list_h(NULL, NULL);
}
static int
xo_do_open_leaf_list (xo_handle_t *xop, xo_xsf_flags_t flags, const char *name)
{
int rc = 0;
int indent = 0;
xop = xo_default(xop);
if (xop->xo_style == XO_STYLE_JSON) {
const char *ppn = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
const char *pre_nl = "";
indent = 1;
if (!(xop->xo_flags & XOF_NO_TOP)) {
if (!(xop->xo_flags & XOF_TOP_EMITTED)) {
xo_printf(xop, "%*s{%s", xo_indent(xop), "", ppn);
xop->xo_flags |= XOF_TOP_EMITTED;
}
}
if (name == NULL) {
xo_failure(xop, "NULL passed for list name");
name = XO_FAILURE_NAME;
}
xo_stack_set_flags(xop);
if (xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST)
pre_nl = (xop->xo_flags & XOF_PRETTY) ? ",\n" : ", ";
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
rc = xo_printf(xop, "%s%*s\"%s\": [%s",
pre_nl, xo_indent(xop), "", name, ppn);
}
xo_depth_change(xop, name, 1, indent, XSS_OPEN_LEAF_LIST,
XSF_LIST | xo_stack_flags(flags));
return rc;
}
static int
xo_do_close_leaf_list (xo_handle_t *xop, const char *name)
{
int rc = 0;
const char *pre_nl = "";
if (name == NULL) {
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
name = xsp->xs_name;
if (name) {
int len = strlen(name) + 1;
/* We need to make a local copy; xo_depth_change will free it */
char *cp = alloca(len);
memcpy(cp, name, len);
name = cp;
} else if (!(xsp->xs_flags & XSF_DTRT)) {
xo_failure(xop, "missing name without 'dtrt' mode");
name = XO_FAILURE_NAME;
}
}
if (xop->xo_style == XO_STYLE_JSON) {
if (xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST)
pre_nl = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
xo_depth_change(xop, name, -1, -1, XSS_CLOSE_LEAF_LIST, XSF_LIST);
rc = xo_printf(xop, "%s%*s]", pre_nl, xo_indent(xop), "");
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
} else {
xo_depth_change(xop, name, -1, 0, XSS_CLOSE_LEAF_LIST, XSF_LIST);
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
}
return rc;
}
static int
xo_do_open_instance (xo_handle_t *xop, xo_xsf_flags_t flags, const char *name)
{
xop = xo_default(xop);
int rc = 0;
const char *ppn = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
const char *pre_nl = "";
flags |= xop->xo_flags;
if (name == NULL) {
xo_failure(xop, "NULL passed for instance name");
name = XO_FAILURE_NAME;
}
switch (xop->xo_style) {
case XO_STYLE_XML:
rc = xo_printf(xop, "%*s<%s", xo_indent(xop), "", name);
if (xop->xo_attrs.xb_curp != xop->xo_attrs.xb_bufp) {
rc += xop->xo_attrs.xb_curp - xop->xo_attrs.xb_bufp;
xo_data_append(xop, xop->xo_attrs.xb_bufp,
xop->xo_attrs.xb_curp - xop->xo_attrs.xb_bufp);
xop->xo_attrs.xb_curp = xop->xo_attrs.xb_bufp;
}
rc += xo_printf(xop, ">%s", ppn);
break;
case XO_STYLE_JSON:
xo_stack_set_flags(xop);
if (xop->xo_stack[xop->xo_depth].xs_flags & XSF_NOT_FIRST)
pre_nl = (xop->xo_flags & XOF_PRETTY) ? ",\n" : ", ";
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
rc = xo_printf(xop, "%s%*s{%s",
pre_nl, xo_indent(xop), "", ppn);
break;
}
xo_depth_change(xop, name, 1, 1, XSS_OPEN_INSTANCE, xo_stack_flags(flags));
return rc;
}
static int
xo_open_instance_hf (xo_handle_t *xop, xo_xsf_flags_t flags, const char *name)
{
return xo_transition(xop, flags, name, XSS_OPEN_INSTANCE);
}
int
xo_open_instance_h (xo_handle_t *xop, const char *name)
{
return xo_open_instance_hf(xop, 0, name);
}
int
xo_open_instance (const char *name)
{
return xo_open_instance_hf(NULL, 0, name);
}
int
xo_open_instance_hd (xo_handle_t *xop, const char *name)
{
return xo_open_instance_hf(xop, XOF_DTRT, name);
}
int
xo_open_instance_d (const char *name)
{
return xo_open_instance_hf(NULL, XOF_DTRT, name);
}
static int
xo_do_close_instance (xo_handle_t *xop, const char *name)
{
xop = xo_default(xop);
int rc = 0;
const char *ppn = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
const char *pre_nl = "";
if (name == NULL) {
xo_stack_t *xsp = &xop->xo_stack[xop->xo_depth];
name = xsp->xs_name;
if (name) {
int len = strlen(name) + 1;
/* We need to make a local copy; xo_depth_change will free it */
char *cp = alloca(len);
memcpy(cp, name, len);
name = cp;
} else if (!(xsp->xs_flags & XSF_DTRT)) {
xo_failure(xop, "missing name without 'dtrt' mode");
name = XO_FAILURE_NAME;
}
}
switch (xop->xo_style) {
case XO_STYLE_XML:
xo_depth_change(xop, name, -1, -1, XSS_CLOSE_INSTANCE, 0);
rc = xo_printf(xop, "%*s</%s>%s", xo_indent(xop), "", name, ppn);
break;
case XO_STYLE_JSON:
pre_nl = (xop->xo_flags & XOF_PRETTY) ? "\n" : "";
xo_depth_change(xop, name, -1, -1, XSS_CLOSE_INSTANCE, 0);
rc = xo_printf(xop, "%s%*s}", pre_nl, xo_indent(xop), "");
xop->xo_stack[xop->xo_depth].xs_flags |= XSF_NOT_FIRST;
break;
case XO_STYLE_HTML:
case XO_STYLE_TEXT:
xo_depth_change(xop, name, -1, 0, XSS_CLOSE_INSTANCE, 0);
break;
}
return rc;
}
int
xo_close_instance_h (xo_handle_t *xop, const char *name)
{
return xo_transition(xop, 0, name, XSS_CLOSE_INSTANCE);
}
int
xo_close_instance (const char *name)
{
return xo_close_instance_h(NULL, name);
}
int
xo_close_instance_hd (xo_handle_t *xop)
{
return xo_close_instance_h(xop, NULL);
}
int
xo_close_instance_d (void)
{
return xo_close_instance_h(NULL, NULL);
}
static int
xo_do_close_all (xo_handle_t *xop, xo_stack_t *limit)
{
xo_stack_t *xsp;
int rc = 0;
xo_xsf_flags_t flags;
for (xsp = &xop->xo_stack[xop->xo_depth]; xsp >= limit; xsp--) {
switch (xsp->xs_state) {
case XSS_INIT:
/* Nothing */
rc = 0;
break;
case XSS_OPEN_CONTAINER:
rc = xo_do_close_container(xop, NULL);
break;
case XSS_OPEN_LIST:
rc = xo_do_close_list(xop, NULL);
break;
case XSS_OPEN_INSTANCE:
rc = xo_do_close_instance(xop, NULL);
break;
case XSS_OPEN_LEAF_LIST:
rc = xo_do_close_leaf_list(xop, NULL);
break;
case XSS_MARKER:
flags = xsp->xs_flags & XSF_MARKER_FLAGS;
xo_depth_change(xop, xsp->xs_name, -1, 0, XSS_MARKER, 0);
xop->xo_stack[xop->xo_depth].xs_flags |= flags;
rc = 0;
break;
}
if (rc < 0)
xo_failure(xop, "close %d failed: %d", xsp->xs_state, rc);
}
return 0;
}
/*
* This function is responsible for clearing out whatever is needed
* to get to the desired state, if possible.
*/
static int
xo_do_close (xo_handle_t *xop, const char *name, xo_state_t new_state)
{
xo_stack_t *xsp, *limit = NULL;
int rc;
xo_state_t need_state = new_state;
if (new_state == XSS_CLOSE_CONTAINER)
need_state = XSS_OPEN_CONTAINER;
else if (new_state == XSS_CLOSE_LIST)
need_state = XSS_OPEN_LIST;
else if (new_state == XSS_CLOSE_INSTANCE)
need_state = XSS_OPEN_INSTANCE;
else if (new_state == XSS_CLOSE_LEAF_LIST)
need_state = XSS_OPEN_LEAF_LIST;
else if (new_state == XSS_MARKER)
need_state = XSS_MARKER;
else
return 0; /* Unknown or useless new states are ignored */
for (xsp = &xop->xo_stack[xop->xo_depth]; xsp > xop->xo_stack; xsp--) {
/*
* Marker's normally stop us from going any further, unless
* we are popping a marker (new_state == XSS_MARKER).
*/
if (xsp->xs_state == XSS_MARKER && need_state != XSS_MARKER) {
if (name) {
xo_failure(xop, "close (xo_%s) fails at marker '%s'; "
"not found '%s'",
xo_state_name(new_state),
xsp->xs_name, name);
return 0;
} else {
limit = xsp;
xo_failure(xop, "close stops at marker '%s'", xsp->xs_name);
}
break;
}
if (xsp->xs_state != need_state)
continue;
if (name && xsp->xs_name && strcmp(name, xsp->xs_name) != 0)
continue;
limit = xsp;
break;
}
if (limit == NULL) {
xo_failure(xop, "xo_%s can't find match for '%s'",
xo_state_name(new_state), name);
return 0;
}
rc = xo_do_close_all(xop, limit);
return rc;
}
/*
* We are in a given state and need to transition to the new state.
*/
static int
xo_transition (xo_handle_t *xop, xo_xsf_flags_t flags, const char *name,
xo_state_t new_state)
{
xo_stack_t *xsp;
int rc;
int old_state, on_marker;
xop = xo_default(xop);
rc = 0;
xsp = &xop->xo_stack[xop->xo_depth];
old_state = xsp->xs_state;
on_marker = (old_state == XSS_MARKER);
/* If there's a marker on top of the stack, we need to find a real state */
while (old_state == XSS_MARKER) {
if (xsp == xop->xo_stack)
break;
xsp -= 1;
old_state = xsp->xs_state;
}
/*
* At this point, the list of possible states are:
* XSS_INIT, XSS_OPEN_CONTAINER, XSS_OPEN_LIST,
* XSS_OPEN_INSTANCE, XSS_OPEN_LEAF_LIST, XSS_DISCARDING
*/
switch (XSS_TRANSITION(old_state, new_state)) {
open_container:
case XSS_TRANSITION(XSS_INIT, XSS_OPEN_CONTAINER):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_OPEN_CONTAINER):
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_OPEN_CONTAINER):
rc = xo_do_open_container(xop, flags, name);
break;
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_OPEN_CONTAINER):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_list(xop, NULL);
if (rc >= 0)
goto open_container;
break;
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_OPEN_CONTAINER):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_leaf_list(xop, NULL);
if (rc >= 0)
goto open_container;
break;
/*close_container:*/
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_CLOSE_CONTAINER):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close(xop, name, new_state);
break;
case XSS_TRANSITION(XSS_INIT, XSS_CLOSE_CONTAINER):
/* This is an exception for "xo --close" */
rc = xo_do_close_container(xop, name);
break;
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_CLOSE_CONTAINER):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_CLOSE_CONTAINER):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close(xop, name, new_state);
break;
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_CLOSE_CONTAINER):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_leaf_list(xop, NULL);
if (rc >= 0)
rc = xo_do_close(xop, name, new_state);
break;
open_list:
case XSS_TRANSITION(XSS_INIT, XSS_OPEN_LIST):
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_OPEN_LIST):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_OPEN_LIST):
rc = xo_do_open_list(xop, flags, name);
break;
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_OPEN_LIST):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_list(xop, NULL);
if (rc >= 0)
goto open_list;
break;
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_OPEN_LIST):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_leaf_list(xop, NULL);
if (rc >= 0)
goto open_list;
break;
/*close_list:*/
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_CLOSE_LIST):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close(xop, name, new_state);
break;
case XSS_TRANSITION(XSS_INIT, XSS_CLOSE_LIST):
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_CLOSE_LIST):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_CLOSE_LIST):
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_CLOSE_LIST):
rc = xo_do_close(xop, name, new_state);
break;
open_instance:
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_OPEN_INSTANCE):
rc = xo_do_open_instance(xop, flags, name);
break;
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_OPEN_INSTANCE):
case XSS_TRANSITION(XSS_INIT, XSS_OPEN_INSTANCE):
rc = xo_do_open_list(xop, flags, name);
if (rc >= 0)
goto open_instance;
break;
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_OPEN_INSTANCE):
if (on_marker) {
rc = xo_do_open_list(xop, flags, name);
} else {
rc = xo_do_close_instance(xop, NULL);
}
if (rc >= 0)
goto open_instance;
break;
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_OPEN_INSTANCE):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_leaf_list(xop, NULL);
if (rc >= 0)
goto open_instance;
break;
/*close_instance:*/
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_CLOSE_INSTANCE):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_instance(xop, name);
break;
case XSS_TRANSITION(XSS_INIT, XSS_CLOSE_INSTANCE):
/* This one makes no sense; ignore it */
break;
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_CLOSE_INSTANCE):
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_CLOSE_INSTANCE):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close(xop, name, new_state);
break;
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_CLOSE_INSTANCE):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_leaf_list(xop, NULL);
if (rc >= 0)
rc = xo_do_close(xop, name, new_state);
break;
open_leaf_list:
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_OPEN_LEAF_LIST):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_OPEN_LEAF_LIST):
case XSS_TRANSITION(XSS_INIT, XSS_OPEN_LEAF_LIST):
rc = xo_do_open_leaf_list(xop, flags, name);
break;
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_OPEN_LEAF_LIST):
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_OPEN_LEAF_LIST):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_list(xop, NULL);
if (rc >= 0)
goto open_leaf_list;
break;
/*close_leaf_list:*/
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_CLOSE_LEAF_LIST):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_leaf_list(xop, name);
break;
case XSS_TRANSITION(XSS_INIT, XSS_CLOSE_LEAF_LIST):
/* Makes no sense; ignore */
break;
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_CLOSE_LEAF_LIST):
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_CLOSE_LEAF_LIST):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_CLOSE_LEAF_LIST):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close(xop, name, new_state);
break;
/*emit:*/
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_EMIT):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_EMIT):
break;
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_EMIT):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close(xop, NULL, XSS_CLOSE_LIST);
break;
case XSS_TRANSITION(XSS_INIT, XSS_EMIT):
break;
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_EMIT):
if (on_marker)
goto marker_prevents_close;
rc = xo_do_close_leaf_list(xop, NULL);
break;
/*emit_leaf_list:*/
case XSS_TRANSITION(XSS_INIT, XSS_EMIT_LEAF_LIST):
case XSS_TRANSITION(XSS_OPEN_CONTAINER, XSS_EMIT_LEAF_LIST):
case XSS_TRANSITION(XSS_OPEN_INSTANCE, XSS_EMIT_LEAF_LIST):
rc = xo_do_open_leaf_list(xop, flags, name);
break;
case XSS_TRANSITION(XSS_OPEN_LEAF_LIST, XSS_EMIT_LEAF_LIST):
break;
case XSS_TRANSITION(XSS_OPEN_LIST, XSS_EMIT_LEAF_LIST):
/*
* We need to be backward compatible with the pre-xo_open_leaf_list
* API, where both lists and leaf-lists were opened as lists. So
* if we find an open list that hasn't had anything written to it,
* we'll accept it.
*/
break;
default:
xo_failure(xop, "unknown transition: (%u -> %u)",
xsp->xs_state, new_state);
}
return rc;
marker_prevents_close:
xo_failure(xop, "marker '%s' prevents transition from %s to %s",
xop->xo_stack[xop->xo_depth].xs_name,
xo_state_name(old_state), xo_state_name(new_state));
return -1;
}
int
xo_open_marker_h (xo_handle_t *xop, const char *name)
{
xop = xo_default(xop);
xo_depth_change(xop, name, 1, 0, XSS_MARKER,
xop->xo_stack[xop->xo_depth].xs_flags & XSF_MARKER_FLAGS);
return 0;
}
int
xo_open_marker (const char *name)
{
return xo_open_marker_h(NULL, name);
}
int
xo_close_marker_h (xo_handle_t *xop, const char *name)
{
xop = xo_default(xop);
return xo_do_close(xop, name, XSS_MARKER);
}
int
xo_close_marker (const char *name)
{
return xo_close_marker_h(NULL, name);
}
void
xo_set_writer (xo_handle_t *xop, void *opaque, xo_write_func_t write_func,
xo_close_func_t close_func, xo_flush_func_t flush_func)
{
xop = xo_default(xop);
xop->xo_opaque = opaque;
xop->xo_write = write_func;
xop->xo_close = close_func;
xop->xo_flush = flush_func;
}
void
xo_set_allocator (xo_realloc_func_t realloc_func, xo_free_func_t free_func)
{
xo_realloc = realloc_func;
xo_free = free_func;
}
int
xo_flush_h (xo_handle_t *xop)
{
static char div_close[] = "</div>";
int rc;
xop = xo_default(xop);
switch (xop->xo_style) {
case XO_STYLE_HTML:
if (xop->xo_flags & XOF_DIV_OPEN) {
xop->xo_flags &= ~XOF_DIV_OPEN;
xo_data_append(xop, div_close, sizeof(div_close) - 1);
if (xop->xo_flags & XOF_PRETTY)
xo_data_append(xop, "\n", 1);
}
break;
}
rc = xo_write(xop);
if (rc >= 0 && xop->xo_flush)
if (xop->xo_flush(xop->xo_opaque) < 0)
return -1;
return rc;
}
int
xo_flush (void)
{
return xo_flush_h(NULL);
}
int
xo_finish_h (xo_handle_t *xop)
{
const char *cp = "";
xop = xo_default(xop);
if (!(xop->xo_flags & XOF_NO_CLOSE))
xo_do_close_all(xop, xop->xo_stack);
switch (xop->xo_style) {
case XO_STYLE_JSON:
if (!(xop->xo_flags & XOF_NO_TOP)) {
if (xop->xo_flags & XOF_TOP_EMITTED)
xop->xo_flags &= ~XOF_TOP_EMITTED; /* Turn off before output */
else
cp = "{ ";
xo_printf(xop, "%*s%s}\n",xo_indent(xop), "", cp);
}
break;
}
return xo_flush_h(xop);
}
int
xo_finish (void)
{
return xo_finish_h(NULL);
}
/*
* Generate an error message, such as would be displayed on stderr
*/
void
xo_error_hv (xo_handle_t *xop, const char *fmt, va_list vap)
{
xop = xo_default(xop);
/*
* If the format string doesn't end with a newline, we pop
* one on ourselves.
*/
int len = strlen(fmt);
if (len > 0 && fmt[len - 1] != '\n') {
char *newfmt = alloca(len + 2);
memcpy(newfmt, fmt, len);
newfmt[len] = '\n';
newfmt[len] = '\0';
fmt = newfmt;
}
switch (xop->xo_style) {
case XO_STYLE_TEXT:
vfprintf(stderr, fmt, vap);
break;
case XO_STYLE_HTML:
va_copy(xop->xo_vap, vap);
xo_buf_append_div(xop, "error", 0, NULL, 0, fmt, strlen(fmt), NULL, 0);
if (xop->xo_flags & XOF_DIV_OPEN)
xo_line_close(xop);
xo_write(xop);
va_end(xop->xo_vap);
bzero(&xop->xo_vap, sizeof(xop->xo_vap));
break;
case XO_STYLE_XML:
case XO_STYLE_JSON:
va_copy(xop->xo_vap, vap);
xo_open_container_h(xop, "error");
xo_format_value(xop, "message", 7, fmt, strlen(fmt), NULL, 0, 0);
xo_close_container_h(xop, "error");
va_end(xop->xo_vap);
bzero(&xop->xo_vap, sizeof(xop->xo_vap));
break;
}
}
void
xo_error_h (xo_handle_t *xop, const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_error_hv(xop, fmt, vap);
va_end(vap);
}
/*
* Generate an error message, such as would be displayed on stderr
*/
void
xo_error (const char *fmt, ...)
{
va_list vap;
va_start(vap, fmt);
xo_error_hv(NULL, fmt, vap);
va_end(vap);
}
int
xo_parse_args (int argc, char **argv)
{
static char libxo_opt[] = "--libxo";
char *cp;
int i, save;
/* Save our program name for xo_err and friends */
xo_program = argv[0];
cp = strrchr(xo_program, '/');
if (cp)
xo_program = cp + 1;
for (save = i = 1; i < argc; i++) {
if (argv[i] == NULL
|| strncmp(argv[i], libxo_opt, sizeof(libxo_opt) - 1) != 0) {
if (save != i)
argv[save] = argv[i];
save += 1;
continue;
}
cp = argv[i] + sizeof(libxo_opt) - 1;
if (*cp == 0) {
cp = argv[++i];
if (cp == 0) {
xo_warnx("missing libxo option");
return -1;
}
if (xo_set_options(NULL, cp) < 0)
return -1;
} else if (*cp == ':') {
if (xo_set_options(NULL, cp) < 0)
return -1;
} else if (*cp == '=') {
if (xo_set_options(NULL, ++cp) < 0)
return -1;
} else if (*cp == '-') {
cp += 1;
if (strcmp(cp, "check") == 0) {
exit(XO_HAS_LIBXO);
} else {
xo_warnx("unknown libxo option: '%s'", argv[i]);
return -1;
}
} else {
xo_warnx("unknown libxo option: '%s'", argv[i]);
return -1;
}
}
argv[save] = NULL;
return save;
}
void
xo_dump_stack (xo_handle_t *xop)
{
int i;
xo_stack_t *xsp;
xop = xo_default(xop);
fprintf(stderr, "Stack dump:\n");
xsp = xop->xo_stack;
for (i = 1, xsp++; i <= xop->xo_depth; i++, xsp++) {
fprintf(stderr, " [%d] %s '%s' [%x]\n",
i, xo_state_name(xsp->xs_state),
xsp->xs_name ?: "--", xsp->xs_flags);
}
}
void
xo_set_program (const char *name)
{
xo_program = name;
}
#ifdef UNIT_TEST
int
main (int argc, char **argv)
{
static char base_grocery[] = "GRO";
static char base_hardware[] = "HRD";
struct item {
const char *i_title;
int i_sold;
int i_instock;
int i_onorder;
const char *i_sku_base;
int i_sku_num;
};
struct item list[] = {
{ "gum&this&that", 1412, 54, 10, base_grocery, 415 },
{ "<rope>", 85, 4, 2, base_hardware, 212 },
{ "ladder", 0, 2, 1, base_hardware, 517 },
{ "\"bolt\"", 4123, 144, 42, base_hardware, 632 },
{ "water\\blue", 17, 14, 2, base_grocery, 2331 },
{ NULL, 0, 0, 0, NULL, 0 }
};
struct item list2[] = {
{ "fish", 1321, 45, 1, base_grocery, 533 },
{ NULL, 0, 0, 0, NULL, 0 }
};
struct item *ip;
xo_info_t info[] = {
{ "in-stock", "number", "Number of items in stock" },
{ "name", "string", "Name of the item" },
{ "on-order", "number", "Number of items on order" },
{ "sku", "string", "Stock Keeping Unit" },
{ "sold", "number", "Number of items sold" },
{ NULL, NULL, NULL },
};
int info_count = (sizeof(info) / sizeof(info[0])) - 1;
argc = xo_parse_args(argc, argv);
if (argc < 0)
exit(1);
xo_set_info(NULL, info, info_count);
xo_open_container_h(NULL, "top");
xo_open_container("data");
xo_open_list("item");
xo_emit("{T:Item/%-15s}{T:Total Sold/%12s}{T:In Stock/%12s}"
"{T:On Order/%12s}{T:SKU/%5s}\n");
for (ip = list; ip->i_title; ip++) {
xo_open_instance("item");
xo_emit("{k:name/%-15s/%s}{n:sold/%12u/%u}{:in-stock/%12u/%u}"
"{:on-order/%12u/%u} {q:sku/%5s-000-%u/%s-000-%u}\n",
ip->i_title, ip->i_sold, ip->i_instock, ip->i_onorder,
ip->i_sku_base, ip->i_sku_num);
xo_close_instance("item");
}
xo_close_list("item");
xo_close_container("data");
xo_emit("\n\n");
xo_open_container("data");
xo_open_list("item");
for (ip = list; ip->i_title; ip++) {
xo_open_instance("item");
xo_attr("fancy", "%s%d", "item", ip - list);
xo_emit("{L:Item} '{k:name/%s}':\n", ip->i_title);
xo_emit("{P: }{L:Total sold}: {n:sold/%u%s}{e:percent/%u}\n",
ip->i_sold, ip->i_sold ? ".0" : "", 44);
xo_emit("{P: }{Lcw:In stock}{:in-stock/%u}\n", ip->i_instock);
xo_emit("{P: }{Lcw:On order}{:on-order/%u}\n", ip->i_onorder);
xo_emit("{P: }{L:SKU}: {q:sku/%s-000-%u}\n",
ip->i_sku_base, ip->i_sku_num);
xo_close_instance("item");
}
xo_close_list("item");
xo_close_container("data");
xo_open_container("data");
xo_open_list("item");
for (ip = list2; ip->i_title; ip++) {
xo_open_instance("item");
xo_emit("{L:Item} '{k:name/%s}':\n", ip->i_title);
xo_emit("{P: }{L:Total sold}: {n:sold/%u%s}\n",
ip->i_sold, ip->i_sold ? ".0" : "");
xo_emit("{P: }{Lcw:In stock}{:in-stock/%u}\n", ip->i_instock);
xo_emit("{P: }{Lcw:On order}{:on-order/%u}\n", ip->i_onorder);
xo_emit("{P: }{L:SKU}: {q:sku/%s-000-%u}\n",
ip->i_sku_base, ip->i_sku_num);
xo_open_list("month");
const char *months[] = { "Jan", "Feb", "Mar", NULL };
int discounts[] = { 10, 20, 25, 0 };
int i;
for (i = 0; months[i]; i++) {
xo_open_instance("month");
xo_emit("{P: }"
"{Lwc:Month}{k:month}, {Lwc:Special}{:discount/%d}\n",
months[i], discounts[i]);
xo_close_instance("month");
}
xo_close_list("month");
xo_close_instance("item");
}
xo_close_list("item");
xo_close_container("data");
xo_close_container_h(NULL, "top");
xo_finish();
return 0;
}
#endif /* UNIT_TEST */
