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Diffstat (limited to 'contrib/isc-dhcp/common/iscprint.c')
-rw-r--r--contrib/isc-dhcp/common/iscprint.c539
1 files changed, 539 insertions, 0 deletions
diff --git a/contrib/isc-dhcp/common/iscprint.c b/contrib/isc-dhcp/common/iscprint.c
new file mode 100644
index 000000000000..d26896e3d447
--- /dev/null
+++ b/contrib/isc-dhcp/common/iscprint.c
@@ -0,0 +1,539 @@
+/*
+ * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1999-2001, 2003 Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: iscprint.c,v 1.1.2.1 2004/06/14 21:09:22 dhankins Exp $ */
+
+#include "dhcpd.h"
+
+#ifdef NO_SNPRINTF
+
+#ifndef LINT
+static char copyright[] =
+"$Id: iscprint.c,v 1.1.2.1 2004/06/14 21:09:22 dhankins Exp $ Copyright (c) 2004 Internet Systems Consortium, Inc. All rights reserved.";
+#endif
+
+#define INSIST(cond) REQUIRE(cond)
+#define REQUIRE(cond) if (!(cond)) { return 0; }
+
+/*
+ * Return length of string that would have been written if not truncated.
+ */
+
+int
+isc_print_snprintf(char *str, size_t size, const char *format, ...) {
+ va_list ap;
+ int ret;
+
+ va_start(ap, format);
+ ret = vsnprintf(str, size, format, ap);
+ va_end(ap);
+ return (ret);
+}
+
+/*
+ * Return length of string that would have been written if not truncated.
+ */
+
+int
+isc_print_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
+ int h;
+ int l;
+ int q;
+ int alt;
+ int zero;
+ int left;
+ int plus;
+ int space;
+ int neg;
+ isc_int64_t tmpi;
+ isc_uint64_t tmpui;
+ unsigned long width;
+ unsigned long precision;
+ unsigned int length;
+ char buf[1024];
+ char c;
+ void *v;
+ char *save = str;
+ const char *cp;
+ const char *head;
+ int count = 0;
+ int pad;
+ int zeropad;
+ int dot;
+ double dbl;
+#ifdef HAVE_LONG_DOUBLE
+ long double ldbl;
+#endif
+ char fmt[32];
+
+ INSIST(str != NULL);
+ INSIST(format != NULL);
+
+ while (*format != '\0') {
+ if (*format != '%') {
+ if (size > 1) {
+ *str++ = *format;
+ size--;
+ }
+ count++;
+ format++;
+ continue;
+ }
+ format++;
+
+ /*
+ * Reset flags.
+ */
+ dot = neg = space = plus = left = zero = alt = h = l = q = 0;
+ width = precision = 0;
+ head = "";
+ length = pad = zeropad = 0;
+
+ do {
+ if (*format == '#') {
+ alt = 1;
+ format++;
+ } else if (*format == '-') {
+ left = 1;
+ zero = 0;
+ format++;
+ } else if (*format == ' ') {
+ if (!plus)
+ space = 1;
+ format++;
+ } else if (*format == '+') {
+ plus = 1;
+ space = 0;
+ format++;
+ } else if (*format == '0') {
+ if (!left)
+ zero = 1;
+ format++;
+ } else
+ break;
+ } while (1);
+
+ /*
+ * Width.
+ */
+ if (*format == '*') {
+ width = va_arg(ap, int);
+ format++;
+ } else if (isdigit((unsigned char)*format)) {
+ char *e;
+ width = strtoul(format, &e, 10);
+ format = e;
+ }
+
+ /*
+ * Precision.
+ */
+ if (*format == '.') {
+ format++;
+ dot = 1;
+ if (*format == '*') {
+ precision = va_arg(ap, int);
+ format++;
+ } else if (isdigit((unsigned char)*format)) {
+ char *e;
+ precision = strtoul(format, &e, 10);
+ format = e;
+ }
+ }
+
+ switch (*format) {
+ case '\0':
+ continue;
+ case '%':
+ if (size > 1) {
+ *str++ = *format;
+ size--;
+ }
+ count++;
+ break;
+ case 'q':
+ q = 1;
+ format++;
+ goto doint;
+ case 'h':
+ h = 1;
+ format++;
+ goto doint;
+ case 'l':
+ l = 1;
+ format++;
+ if (*format == 'l') {
+ q = 1;
+ format++;
+ }
+ goto doint;
+ case 'n':
+ case 'i':
+ case 'd':
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ doint:
+ if (precision != 0)
+ zero = 0;
+ switch (*format) {
+ case 'n':
+ if (h) {
+ short int *p;
+ p = va_arg(ap, short *);
+ REQUIRE(p != NULL);
+ *p = str - save;
+ } else if (l) {
+ long int *p;
+ p = va_arg(ap, long *);
+ REQUIRE(p != NULL);
+ *p = str - save;
+ } else {
+ int *p;
+ p = va_arg(ap, int *);
+ REQUIRE(p != NULL);
+ *p = str - save;
+ }
+ break;
+ case 'i':
+ case 'd':
+ if (q)
+ tmpi = va_arg(ap, isc_int64_t);
+ else if (l)
+ tmpi = va_arg(ap, long int);
+ else
+ tmpi = va_arg(ap, int);
+ if (tmpi < 0) {
+ head = "-";
+ tmpui = -tmpi;
+ } else {
+ if (plus)
+ head = "+";
+ else if (space)
+ head = " ";
+ else
+ head = "";
+ tmpui = tmpi;
+ }
+ sprintf(buf, "%u", tmpui);
+ goto printint;
+ case 'o':
+ if (q)
+ tmpui = va_arg(ap, isc_uint64_t);
+ else if (l)
+ tmpui = va_arg(ap, long int);
+ else
+ tmpui = va_arg(ap, int);
+ sprintf(buf, alt ? "%#o"
+ : "%o", tmpui);
+ goto printint;
+ case 'u':
+ if (q)
+ tmpui = va_arg(ap, isc_uint64_t);
+ else if (l)
+ tmpui = va_arg(ap, unsigned long int);
+ else
+ tmpui = va_arg(ap, unsigned int);
+ sprintf(buf, "%u", tmpui);
+ goto printint;
+ case 'x':
+ if (q)
+ tmpui = va_arg(ap, isc_uint64_t);
+ else if (l)
+ tmpui = va_arg(ap, unsigned long int);
+ else
+ tmpui = va_arg(ap, unsigned int);
+ if (alt) {
+ head = "0x";
+ if (precision > 2)
+ precision -= 2;
+ }
+ sprintf(buf, "%x", tmpui);
+ goto printint;
+ case 'X':
+ if (q)
+ tmpui = va_arg(ap, isc_uint64_t);
+ else if (l)
+ tmpui = va_arg(ap, unsigned long int);
+ else
+ tmpui = va_arg(ap, unsigned int);
+ if (alt) {
+ head = "0X";
+ if (precision > 2)
+ precision -= 2;
+ }
+ sprintf(buf, "%X", tmpui);
+ goto printint;
+ printint:
+ if (precision != 0 || width != 0) {
+ length = strlen(buf);
+ if (length < precision)
+ zeropad = precision - length;
+ else if (length < width && zero)
+ zeropad = width - length;
+ if (width != 0) {
+ pad = width - length -
+ zeropad - strlen(head);
+ if (pad < 0)
+ pad = 0;
+ }
+ }
+ count += strlen(head) + strlen(buf) + pad +
+ zeropad;
+ if (!left) {
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ }
+ cp = head;
+ while (*cp != '\0' && size > 1) {
+ *str++ = *cp++;
+ size--;
+ }
+ while (zeropad > 0 && size > 1) {
+ *str++ = '0';
+ size--;
+ zeropad--;
+ }
+ cp = buf;
+ while (*cp != '\0' && size > 1) {
+ *str++ = *cp++;
+ size--;
+ }
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
+ case 's':
+ cp = va_arg(ap, char *);
+ REQUIRE(cp != NULL);
+
+ if (precision != 0) {
+ /*
+ * cp need not be NULL terminated.
+ */
+ const char *tp;
+ unsigned long n;
+
+ n = precision;
+ tp = cp;
+ while (n != 0 && *tp != '\0')
+ n--, tp++;
+ length = precision - n;
+ } else {
+ length = strlen(cp);
+ }
+ if (width != 0) {
+ pad = width - length;
+ if (pad < 0)
+ pad = 0;
+ }
+ count += pad + length;
+ if (!left)
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ if (precision != 0)
+ while (precision > 0 && *cp != '\0' &&
+ size > 1) {
+ *str++ = *cp++;
+ size--;
+ precision--;
+ }
+ else
+ while (*cp != '\0' && size > 1) {
+ *str++ = *cp++;
+ size--;
+ }
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ break;
+ case 'c':
+ c = va_arg(ap, int);
+ if (width > 0) {
+ count += width;
+ width--;
+ if (left) {
+ *str++ = c;
+ size--;
+ }
+ while (width-- > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ }
+ if (!left && size > 1) {
+ *str++ = c;
+ size--;
+ }
+ } else {
+ count++;
+ if (size > 1) {
+ *str++ = c;
+ size--;
+ }
+ }
+ break;
+ case 'p':
+ v = va_arg(ap, void *);
+ sprintf(buf, "%p", v);
+ length = strlen(buf);
+ if (precision > length)
+ zeropad = precision - length;
+ if (width > 0) {
+ pad = width - length - zeropad;
+ if (pad < 0)
+ pad = 0;
+ }
+ count += length + pad + zeropad;
+ if (!left)
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ cp = buf;
+ if (zeropad > 0 && buf[0] == '0' &&
+ (buf[1] == 'x' || buf[1] == 'X')) {
+ if (size > 1) {
+ *str++ = *cp++;
+ size--;
+ }
+ if (size > 1) {
+ *str++ = *cp++;
+ size--;
+ }
+ while (zeropad > 0 && size > 1) {
+ *str++ = '0';
+ size--;
+ zeropad--;
+ }
+ }
+ while (*cp != '\0' && size > 1) {
+ *str++ = *cp++;
+ size--;
+ }
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ break;
+ case 'D': /*deprecated*/
+ INSIST("use %ld instead of %D" == NULL);
+ case 'O': /*deprecated*/
+ INSIST("use %lo instead of %O" == NULL);
+ case 'U': /*deprecated*/
+ INSIST("use %lu instead of %U" == NULL);
+
+ case 'L':
+#ifdef HAVE_LONG_DOUBLE
+ l = 1;
+#else
+ INSIST("long doubles are not supported" == NULL);
+#endif
+ /*FALLTHROUGH*/
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G':
+ if (!dot)
+ precision = 6;
+ /*
+ * IEEE floating point.
+ * MIN 2.2250738585072014E-308
+ * MAX 1.7976931348623157E+308
+ * VAX floating point has a smaller range than IEEE.
+ *
+ * precisions > 324 don't make much sense.
+ * if we cap the precision at 512 we will not
+ * overflow buf.
+ */
+ if (precision > 512)
+ precision = 512;
+ sprintf(fmt, "%%%s%s.%lu%s%c", alt ? "#" : "",
+ plus ? "+" : space ? " " : "",
+ precision, l ? "L" : "", *format);
+ switch (*format) {
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G':
+#ifdef HAVE_LONG_DOUBLE
+ if (l) {
+ ldbl = va_arg(ap, long double);
+ sprintf(buf, fmt, ldbl);
+ } else
+#endif
+ {
+ dbl = va_arg(ap, double);
+ sprintf(buf, fmt, dbl);
+ }
+ length = strlen(buf);
+ if (width > 0) {
+ pad = width - length;
+ if (pad < 0)
+ pad = 0;
+ }
+ count += length + pad;
+ if (!left)
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ cp = buf;
+ while (*cp != ' ' && size > 1) {
+ *str++ = *cp++;
+ size--;
+ }
+ while (pad > 0 && size > 1) {
+ *str++ = ' ';
+ size--;
+ pad--;
+ }
+ break;
+ default:
+ continue;
+ }
+ break;
+ default:
+ continue;
+ }
+ format++;
+ }
+ if (size > 0)
+ *str = '\0';
+ return (count);
+}
+
+#endif