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/*
* Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#define _GNU_SOURCE
#include <stdio.h>
#include "dtc.h"
#include "srcpos.h"
/*
* Like yylineno, this is the current open file pos.
*/
struct dtc_file *srcpos_file;
/*
* The empty source position.
*/
struct dtc_file dtc_empty_file = {
.dir = NULL,
.name = "<no file>",
.file = NULL
};
srcpos srcpos_empty = {
.first_line = 0,
.first_column = 0,
.last_line = 0,
.last_column = 0,
.file = &dtc_empty_file
};
static int
dtc_open_one(struct dtc_file *file, const char *search, const char *fname)
{
char *fullname;
if (search) {
fullname = xmalloc(strlen(search) + strlen(fname) + 2);
strcpy(fullname, search);
strcat(fullname, "/");
strcat(fullname, fname);
} else {
fullname = xstrdup(fname);
}
file->file = fopen(fullname, "r");
if (!file->file) {
free(fullname);
return 0;
}
file->name = fullname;
return 1;
}
struct dtc_file *
dtc_open_file(const char *fname, const struct search_path *search)
{
static const struct search_path default_search = { NULL, NULL, NULL };
struct dtc_file *file;
const char *slash;
file = xmalloc(sizeof(struct dtc_file));
slash = strrchr(fname, '/');
if (slash) {
char *dir = xmalloc(slash - fname + 1);
memcpy(dir, fname, slash - fname);
dir[slash - fname] = 0;
file->dir = dir;
} else {
file->dir = NULL;
}
if (streq(fname, "-")) {
file->name = "stdin";
file->file = stdin;
return file;
}
if (fname[0] == '/') {
file->file = fopen(fname, "r");
if (!file->file)
goto fail;
file->name = xstrdup(fname);
return file;
}
if (!search)
search = &default_search;
while (search) {
if (dtc_open_one(file, search->dir, fname))
return file;
if (errno != ENOENT)
goto fail;
search = search->next;
}
fail:
die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
}
void
dtc_close_file(struct dtc_file *file)
{
if (fclose(file->file))
die("Error closing \"%s\": %s\n", file->name, strerror(errno));
}
srcpos *
srcpos_copy(srcpos *pos)
{
srcpos *pos_new;
pos_new = xmalloc(sizeof(srcpos));
memcpy(pos_new, pos, sizeof(srcpos));
return pos_new;
}
void
srcpos_dump(srcpos *pos)
{
printf("file : \"%s\"\n",
pos->file ? (char *) pos->file : "<no file>");
printf("first_line : %d\n", pos->first_line);
printf("first_column: %d\n", pos->first_column);
printf("last_line : %d\n", pos->last_line);
printf("last_column : %d\n", pos->last_column);
printf("file : %s\n", pos->file->name);
}
char *
srcpos_string(srcpos *pos)
{
const char *fname;
char col_buf[100];
char *pos_str;
if (!pos) {
fname = "<no-file>";
} else if (pos->file->name) {
fname = pos->file->name;
if (strcmp(fname, "-") == 0)
fname = "stdin";
} else {
fname = "<no-file>";
}
if (pos->first_line == pos->last_line) {
if (pos->first_column == pos->last_column) {
snprintf(col_buf, sizeof(col_buf),
"%d:%d",
pos->first_line, pos->first_column);
} else {
snprintf(col_buf, sizeof(col_buf),
"%d:%d-%d",
pos->first_line,
pos->first_column, pos->last_column);
}
} else {
snprintf(col_buf, sizeof(col_buf),
"%d:%d - %d:%d",
pos->first_line, pos->first_column,
pos->last_line, pos->last_column);
}
if (asprintf(&pos_str, "%s %s", fname, col_buf) == -1)
return "<unknown source position?";
return pos_str;
}
void
srcpos_error(srcpos *pos, char const *fmt, ...)
{
const char *srcstr;
va_list va;
va_start(va, fmt);
srcstr = srcpos_string(pos);
fprintf(stderr, "Error: %s ", srcstr);
vfprintf(stderr, fmt, va);
fprintf(stderr, "\n");
va_end(va);
}
void
srcpos_warn(srcpos *pos, char const *fmt, ...)
{
const char *srcstr;
va_list va;
va_start(va, fmt);
srcstr = srcpos_string(pos);
fprintf(stderr, "Warning: %s ", srcstr);
vfprintf(stderr, fmt, va);
fprintf(stderr, "\n");
va_end(va);
}
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