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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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8fc876f09f
We will add support for our own printf modifiers, so we can get nice debug log output on all operating systems irrespective of the specific libc version used. https://bugzilla.gnome.org/show_bug.cgi?id=613081
449 lines
12 KiB
C
449 lines
12 KiB
C
/* Formatted output to strings.
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Copyright (C) 1999-2000, 2002-2003 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published
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by the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "gst-printf.h"
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/* Specification. */
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#include "printf-parse.h"
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/* Get size_t, NULL. */
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#include <stddef.h>
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/* Get intmax_t. */
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#if HAVE_STDINT_H_WITH_UINTMAX
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# include <stdint.h>
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#endif
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#if HAVE_INTTYPES_H_WITH_UINTMAX
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# include <inttypes.h>
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#endif
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/* malloc(), realloc(), free(). */
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#include <stdlib.h>
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#ifdef STATIC
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STATIC
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#endif
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int
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printf_parse (const char *format, char_directives * d, arguments * a)
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{
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const char *cp = format; /* pointer into format */
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int arg_posn = 0; /* number of regular arguments consumed */
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unsigned int d_allocated; /* allocated elements of d->dir */
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unsigned int a_allocated; /* allocated elements of a->arg */
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unsigned int max_width_length = 0;
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unsigned int max_precision_length = 0;
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d->count = 0;
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d_allocated = 1;
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d->dir = malloc (d_allocated * sizeof (char_directive));
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if (d->dir == NULL)
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/* Out of memory. */
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return -1;
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a->count = 0;
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a_allocated = 0;
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a->arg = NULL;
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#define REGISTER_ARG(_index_,_type_) \
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{ \
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unsigned int n = (_index_); \
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if (n >= a_allocated) \
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{ \
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argument *memory; \
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a_allocated = 2 * a_allocated; \
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if (a_allocated <= n) \
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a_allocated = n + 1; \
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memory = (a->arg \
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? realloc (a->arg, a_allocated * sizeof (argument)) \
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: malloc (a_allocated * sizeof (argument))); \
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if (memory == NULL) \
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/* Out of memory. */ \
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goto error; \
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a->arg = memory; \
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} \
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while (a->count <= n) \
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a->arg[a->count++].type = TYPE_NONE; \
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if (a->arg[n].type == TYPE_NONE) \
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a->arg[n].type = (_type_); \
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else if (a->arg[n].type != (_type_)) \
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/* Ambiguous type for positional argument. */ \
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goto error; \
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}
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while (*cp != '\0') {
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char c = *cp++;
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if (c == '%') {
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int arg_index = -1;
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char_directive *dp = &d->dir[d->count]; /* pointer to next directive */
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/* Initialize the next directive. */
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dp->dir_start = cp - 1;
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dp->flags = 0;
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dp->width_start = NULL;
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dp->width_end = NULL;
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dp->width_arg_index = -1;
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dp->precision_start = NULL;
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dp->precision_end = NULL;
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dp->precision_arg_index = -1;
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dp->arg_index = -1;
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/* Test for positional argument. */
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if (*cp >= '0' && *cp <= '9') {
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const char *np;
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for (np = cp; *np >= '0' && *np <= '9'; np++);
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if (*np == '$') {
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unsigned int n = 0;
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for (np = cp; *np >= '0' && *np <= '9'; np++)
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n = 10 * n + (*np - '0');
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if (n == 0)
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/* Positional argument 0. */
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goto error;
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arg_index = n - 1;
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cp = np + 1;
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}
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}
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/* Read the flags. */
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for (;;) {
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if (*cp == '\'') {
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dp->flags |= FLAG_GROUP;
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cp++;
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} else if (*cp == '-') {
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dp->flags |= FLAG_LEFT;
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cp++;
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} else if (*cp == '+') {
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dp->flags |= FLAG_SHOWSIGN;
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cp++;
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} else if (*cp == ' ') {
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dp->flags |= FLAG_SPACE;
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cp++;
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} else if (*cp == '#') {
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dp->flags |= FLAG_ALT;
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cp++;
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} else if (*cp == '0') {
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dp->flags |= FLAG_ZERO;
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cp++;
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} else
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break;
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}
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/* Parse the field width. */
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if (*cp == '*') {
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dp->width_start = cp;
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cp++;
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dp->width_end = cp;
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if (max_width_length < 1)
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max_width_length = 1;
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/* Test for positional argument. */
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if (*cp >= '0' && *cp <= '9') {
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const char *np;
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for (np = cp; *np >= '0' && *np <= '9'; np++);
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if (*np == '$') {
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unsigned int n = 0;
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for (np = cp; *np >= '0' && *np <= '9'; np++)
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n = 10 * n + (*np - '0');
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if (n == 0)
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/* Positional argument 0. */
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goto error;
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dp->width_arg_index = n - 1;
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cp = np + 1;
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}
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}
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if (dp->width_arg_index < 0)
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dp->width_arg_index = arg_posn++;
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REGISTER_ARG (dp->width_arg_index, TYPE_INT);
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} else if (*cp >= '0' && *cp <= '9') {
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unsigned int width_length;
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dp->width_start = cp;
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for (; *cp >= '0' && *cp <= '9'; cp++);
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dp->width_end = cp;
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width_length = dp->width_end - dp->width_start;
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if (max_width_length < width_length)
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max_width_length = width_length;
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}
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/* Parse the precision. */
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if (*cp == '.') {
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cp++;
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if (*cp == '*') {
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dp->precision_start = cp - 1;
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cp++;
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dp->precision_end = cp;
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if (max_precision_length < 2)
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max_precision_length = 2;
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/* Test for positional argument. */
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if (*cp >= '0' && *cp <= '9') {
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const char *np;
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for (np = cp; *np >= '0' && *np <= '9'; np++);
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if (*np == '$') {
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unsigned int n = 0;
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for (np = cp; *np >= '0' && *np <= '9'; np++)
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n = 10 * n + (*np - '0');
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if (n == 0)
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/* Positional argument 0. */
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goto error;
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dp->precision_arg_index = n - 1;
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cp = np + 1;
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}
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}
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if (dp->precision_arg_index < 0)
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dp->precision_arg_index = arg_posn++;
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REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
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} else {
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unsigned int precision_length;
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dp->precision_start = cp - 1;
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for (; *cp >= '0' && *cp <= '9'; cp++);
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dp->precision_end = cp;
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precision_length = dp->precision_end - dp->precision_start;
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if (max_precision_length < precision_length)
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max_precision_length = precision_length;
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}
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}
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{
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arg_type type;
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/* Parse argument type/size specifiers. */
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{
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int flags = 0;
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for (;;) {
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if (*cp == 'h') {
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flags |= (1 << (flags & 1));
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cp++;
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} else if (*cp == 'L') {
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flags |= 4;
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cp++;
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} else if (*cp == 'l') {
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flags += 8;
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cp++;
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}
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#ifdef HAVE_INT64_AND_I64
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else if (cp[0] == 'I' && cp[1] == '6' && cp[2] == '4') {
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flags = 64;
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cp += 3;
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}
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#endif
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#ifdef HAVE_INTMAX_T
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else if (*cp == 'j') {
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if (sizeof (intmax_t) > sizeof (long)) {
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/* intmax_t = long long */
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flags += 16;
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} else if (sizeof (intmax_t) > sizeof (int)) {
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/* intmax_t = long */
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flags += 8;
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}
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cp++;
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}
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#endif
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else if (*cp == 'z' || *cp == 'Z') {
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/* 'z' is standardized in ISO C 99, but glibc uses 'Z'
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because the warning facility in gcc-2.95.2 understands
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only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784). */
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if (sizeof (size_t) > sizeof (long)) {
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/* size_t = long long */
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flags += 16;
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} else if (sizeof (size_t) > sizeof (int)) {
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/* size_t = long */
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flags += 8;
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}
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cp++;
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} else if (*cp == 't') {
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if (sizeof (ptrdiff_t) > sizeof (long)) {
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/* ptrdiff_t = long long */
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flags += 16;
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} else if (sizeof (ptrdiff_t) > sizeof (int)) {
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/* ptrdiff_t = long */
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flags += 8;
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}
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cp++;
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} else
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break;
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}
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/* Read the conversion character. */
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c = *cp++;
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switch (c) {
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case 'd':
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case 'i':
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#ifdef HAVE_INT64_AND_I64
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if (flags == 64)
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type = TYPE_INT64;
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else
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#endif
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#ifdef HAVE_LONG_LONG
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if (flags >= 16 || (flags & 4))
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type = TYPE_LONGLONGINT;
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else
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#endif
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if (flags >= 8)
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type = TYPE_LONGINT;
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else if (flags & 2)
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type = TYPE_SCHAR;
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else if (flags & 1)
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type = TYPE_SHORT;
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else
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type = TYPE_INT;
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break;
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case 'o':
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case 'u':
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case 'x':
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case 'X':
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#ifdef HAVE_INT64_AND_I64
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if (flags == 64)
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type = TYPE_UINT64;
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else
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#endif
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#ifdef HAVE_LONG_LONG
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if (flags >= 16 || (flags & 4))
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type = TYPE_ULONGLONGINT;
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else
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#endif
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if (flags >= 8)
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type = TYPE_ULONGINT;
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else if (flags & 2)
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type = TYPE_UCHAR;
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else if (flags & 1)
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type = TYPE_USHORT;
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else
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type = TYPE_UINT;
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break;
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case 'f':
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case 'F':
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case 'e':
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case 'E':
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case 'g':
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case 'G':
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case 'a':
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case 'A':
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#ifdef HAVE_LONG_DOUBLE
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if (flags >= 16 || (flags & 4))
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type = TYPE_LONGDOUBLE;
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else
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#endif
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type = TYPE_DOUBLE;
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break;
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case 'c':
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if (flags >= 8)
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#ifdef HAVE_WINT_T
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type = TYPE_WIDE_CHAR;
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#else
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goto error;
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#endif
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else
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type = TYPE_CHAR;
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break;
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#ifdef HAVE_WINT_T
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case 'C':
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type = TYPE_WIDE_CHAR;
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c = 'c';
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break;
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#endif
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case 's':
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if (flags >= 8)
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#ifdef HAVE_WCHAR_T
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type = TYPE_WIDE_STRING;
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#else
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goto error;
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#endif
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else
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type = TYPE_STRING;
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break;
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#ifdef HAVE_WCHAR_T
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case 'S':
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type = TYPE_WIDE_STRING;
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c = 's';
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break;
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#endif
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case 'p':
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type = TYPE_POINTER;
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break;
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case 'n':
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#ifdef HAVE_LONG_LONG
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if (flags >= 16 || (flags & 4))
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type = TYPE_COUNT_LONGLONGINT_POINTER;
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else
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#endif
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if (flags >= 8)
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type = TYPE_COUNT_LONGINT_POINTER;
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else if (flags & 2)
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type = TYPE_COUNT_SCHAR_POINTER;
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else if (flags & 1)
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type = TYPE_COUNT_SHORT_POINTER;
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else
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type = TYPE_COUNT_INT_POINTER;
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break;
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case '%':
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type = TYPE_NONE;
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break;
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default:
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/* Unknown conversion character. */
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goto error;
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}
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}
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if (type != TYPE_NONE) {
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dp->arg_index = arg_index;
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if (dp->arg_index < 0)
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dp->arg_index = arg_posn++;
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REGISTER_ARG (dp->arg_index, type);
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}
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dp->conversion = c;
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dp->dir_end = cp;
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}
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d->count++;
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if (d->count >= d_allocated) {
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char_directive *memory;
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d_allocated = 2 * d_allocated;
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memory = realloc (d->dir, d_allocated * sizeof (char_directive));
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if (memory == NULL)
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/* Out of memory. */
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goto error;
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d->dir = memory;
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}
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}
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}
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d->dir[d->count].dir_start = cp;
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d->max_width_length = max_width_length;
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d->max_precision_length = max_precision_length;
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return 0;
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error:
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if (a->arg)
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free (a->arg);
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if (d->dir)
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free (d->dir);
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return -1;
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}
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