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gstreamer/gst/printf/printf-parse.c
Tim-Philipp Müller 9a9b449c5f printf: handle old GST_PTR_FORMAT %P and GST_SEGMENT_FORMAT %Q defines too 
For binary backwards compatibility.
2013-04-12 23:05:57 +01:00

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/* Formatted output to strings.
Copyright (C) 1999-2000, 2002-2003 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published
by the Free Software Foundation; either version 2, 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
Library General Public License for more details.
You should have received a copy of the GNU Library 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. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "gst-printf.h"
/* Specification. */
#include "printf-parse.h"
/* Get size_t, NULL. */
#include <stddef.h>
/* Get intmax_t. */
#if HAVE_STDINT_H_WITH_UINTMAX
# include <stdint.h>
#endif
#if HAVE_INTTYPES_H_WITH_UINTMAX
# include <inttypes.h>
#endif
/* malloc(), realloc(), free(). */
#include <stdlib.h>
#ifdef STATIC
STATIC
#endif
int
printf_parse (const char *format, char_directives * d, arguments * a)
{
const char *cp = format; /* pointer into format */
int arg_posn = 0; /* number of regular arguments consumed */
unsigned int d_allocated; /* allocated elements of d->dir */
unsigned int a_allocated; /* allocated elements of a->arg */
unsigned int max_width_length = 0;
unsigned int max_precision_length = 0;
d->count = 0;
d_allocated = 1;
d->dir = malloc (d_allocated * sizeof (char_directive));
if (d->dir == NULL)
/* Out of memory. */
return -1;
a->count = 0;
a_allocated = 0;
a->arg = NULL;
#define REGISTER_ARG(_index_,_type_) \
{ \
unsigned int n = (_index_); \
if (n >= a_allocated) \
{ \
argument *memory; \
a_allocated = 2 * a_allocated; \
if (a_allocated <= n) \
a_allocated = n + 1; \
memory = (a->arg \
? realloc (a->arg, a_allocated * sizeof (argument)) \
: malloc (a_allocated * sizeof (argument))); \
if (memory == NULL) \
/* Out of memory. */ \
goto error; \
a->arg = memory; \
} \
while (a->count <= n) { \
a->arg[a->count].type = TYPE_NONE; \
a->arg[a->count].ext_string = (char *) 0; \
++a->count; \
} \
if (a->arg[n].type == TYPE_NONE) \
a->arg[n].type = (_type_); \
else if (a->arg[n].type != (_type_)) \
/* Ambiguous type for positional argument. */ \
goto error; \
}
while (*cp != '\0') {
char c = *cp++;
if (c == '%') {
int arg_index = -1;
char_directive *dp = &d->dir[d->count]; /* pointer to next directive */
/* Initialize the next directive. */
dp->dir_start = cp - 1;
dp->flags = 0;
dp->width_start = NULL;
dp->width_end = NULL;
dp->width_arg_index = -1;
dp->precision_start = NULL;
dp->precision_end = NULL;
dp->precision_arg_index = -1;
dp->arg_index = -1;
/* Test for positional argument. */
if (*cp >= '0' && *cp <= '9') {
const char *np;
for (np = cp; *np >= '0' && *np <= '9'; np++);
if (*np == '$') {
unsigned int n = 0;
for (np = cp; *np >= '0' && *np <= '9'; np++)
n = 10 * n + (*np - '0');
if (n == 0)
/* Positional argument 0. */
goto error;
arg_index = n - 1;
cp = np + 1;
}
}
/* Read the flags. */
for (;;) {
if (*cp == '\'') {
dp->flags |= FLAG_GROUP;
cp++;
} else if (*cp == '-') {
dp->flags |= FLAG_LEFT;
cp++;
} else if (*cp == '+') {
dp->flags |= FLAG_SHOWSIGN;
cp++;
} else if (*cp == ' ') {
dp->flags |= FLAG_SPACE;
cp++;
} else if (*cp == '#') {
dp->flags |= FLAG_ALT;
cp++;
} else if (*cp == '0') {
dp->flags |= FLAG_ZERO;
cp++;
} else
break;
}
/* Parse the field width. */
if (*cp == '*') {
dp->width_start = cp;
cp++;
dp->width_end = cp;
if (max_width_length < 1)
max_width_length = 1;
/* Test for positional argument. */
if (*cp >= '0' && *cp <= '9') {
const char *np;
for (np = cp; *np >= '0' && *np <= '9'; np++);
if (*np == '$') {
unsigned int n = 0;
for (np = cp; *np >= '0' && *np <= '9'; np++)
n = 10 * n + (*np - '0');
if (n == 0)
/* Positional argument 0. */
goto error;
dp->width_arg_index = n - 1;
cp = np + 1;
}
}
if (dp->width_arg_index < 0)
dp->width_arg_index = arg_posn++;
REGISTER_ARG (dp->width_arg_index, TYPE_INT);
} else if (*cp >= '0' && *cp <= '9') {
unsigned int width_length;
dp->width_start = cp;
for (; *cp >= '0' && *cp <= '9'; cp++);
dp->width_end = cp;
width_length = dp->width_end - dp->width_start;
if (max_width_length < width_length)
max_width_length = width_length;
}
/* Parse the precision. */
if (*cp == '.') {
cp++;
if (*cp == '*') {
dp->precision_start = cp - 1;
cp++;
dp->precision_end = cp;
if (max_precision_length < 2)
max_precision_length = 2;
/* Test for positional argument. */
if (*cp >= '0' && *cp <= '9') {
const char *np;
for (np = cp; *np >= '0' && *np <= '9'; np++);
if (*np == '$') {
unsigned int n = 0;
for (np = cp; *np >= '0' && *np <= '9'; np++)
n = 10 * n + (*np - '0');
if (n == 0)
/* Positional argument 0. */
goto error;
dp->precision_arg_index = n - 1;
cp = np + 1;
}
}
if (dp->precision_arg_index < 0)
dp->precision_arg_index = arg_posn++;
REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
} else {
unsigned int precision_length;
dp->precision_start = cp - 1;
for (; *cp >= '0' && *cp <= '9'; cp++);
dp->precision_end = cp;
precision_length = dp->precision_end - dp->precision_start;
if (max_precision_length < precision_length)
max_precision_length = precision_length;
}
}
{
arg_type type;
/* Parse argument type/size specifiers. */
{
int flags = 0;
for (;;) {
if (*cp == 'h') {
flags |= (1 << (flags & 1));
cp++;
} else if (*cp == 'L') {
flags |= 4;
cp++;
} else if (*cp == 'l') {
flags += 8;
cp++;
}
#ifdef HAVE_INT64_AND_I64
else if (cp[0] == 'I' && cp[1] == '6' && cp[2] == '4') {
flags = 64;
cp += 3;
}
#endif
#ifdef HAVE_INTMAX_T
else if (*cp == 'j') {
if (sizeof (intmax_t) > sizeof (long)) {
/* intmax_t = long long */
flags += 16;
} else if (sizeof (intmax_t) > sizeof (int)) {
/* intmax_t = long */
flags += 8;
}
cp++;
}
#endif
else if (*cp == 'z' || *cp == 'Z') {
/* 'z' is standardized in ISO C 99, but glibc uses 'Z'
because the warning facility in gcc-2.95.2 understands
only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784). */
if (sizeof (size_t) > sizeof (long)) {
/* size_t = long long */
flags += 16;
} else if (sizeof (size_t) > sizeof (int)) {
/* size_t = long */
flags += 8;
}
cp++;
} else if (*cp == 't') {
if (sizeof (ptrdiff_t) > sizeof (long)) {
/* ptrdiff_t = long long */
flags += 16;
} else if (sizeof (ptrdiff_t) > sizeof (int)) {
/* ptrdiff_t = long */
flags += 8;
}
cp++;
} else
break;
}
/* Read the conversion character. */
c = *cp++;
switch (c) {
case 'd':
case 'i':
#ifdef HAVE_INT64_AND_I64
if (flags == 64)
type = TYPE_INT64;
else
#endif
#ifdef HAVE_LONG_LONG
if (flags >= 16 || (flags & 4))
type = TYPE_LONGLONGINT;
else
#endif
if (flags >= 8)
type = TYPE_LONGINT;
else if (flags & 2)
type = TYPE_SCHAR;
else if (flags & 1)
type = TYPE_SHORT;
else
type = TYPE_INT;
break;
case 'o':
case 'u':
case 'x':
case 'X':
#ifdef HAVE_INT64_AND_I64
if (flags == 64)
type = TYPE_UINT64;
else
#endif
#ifdef HAVE_LONG_LONG
if (flags >= 16 || (flags & 4))
type = TYPE_ULONGLONGINT;
else
#endif
if (flags >= 8)
type = TYPE_ULONGINT;
else if (flags & 2)
type = TYPE_UCHAR;
else if (flags & 1)
type = TYPE_USHORT;
else
type = TYPE_UINT;
break;
case 'f':
case 'F':
case 'e':
case 'E':
case 'g':
case 'G':
case 'a':
case 'A':
#ifdef HAVE_LONG_DOUBLE
if (flags >= 16 || (flags & 4))
type = TYPE_LONGDOUBLE;
else
#endif
type = TYPE_DOUBLE;
break;
case 'c':
if (flags >= 8)
#ifdef HAVE_WINT_T
type = TYPE_WIDE_CHAR;
#else
goto error;
#endif
else
type = TYPE_CHAR;
break;
#ifdef HAVE_WINT_T
case 'C':
type = TYPE_WIDE_CHAR;
c = 'c';
break;
#endif
case 's':
if (flags >= 8)
#ifdef HAVE_WCHAR_T
type = TYPE_WIDE_STRING;
#else
goto error;
#endif
else
type = TYPE_STRING;
break;
#ifdef HAVE_WCHAR_T
case 'S':
type = TYPE_WIDE_STRING;
c = 's';
break;
#endif
/* Old GST_PTR_FORMAT, handle for binary backwards compatibility */
case 'P':
type = TYPE_POINTER_EXT;
dp->flags |= FLAG_PTR_EXT;
dp->ptr_ext_char = 'A';
dp->conversion = 'p';
break;
case 'p':
/* Note: cp points already to the char after the 'p' now */
if (cp[0] == POINTER_EXT_SIGNIFIER_CHAR && cp[1] != '\0') {
type = TYPE_POINTER_EXT;
dp->flags |= FLAG_PTR_EXT;
dp->ptr_ext_char = cp[1];
/* we do not use dp->conversion='s' on purpose here, so we
* can fall back to printing just the pointer with %p if the
* serialisation function returned NULL for some reason */
} else {
type = TYPE_POINTER;
}
break;
/* Old GST_SEGMENT_FORMAT, handle for backwards compatibility */
case 'Q':
type = TYPE_POINTER_EXT;
dp->flags |= FLAG_PTR_EXT;
dp->ptr_ext_char = 'B';
dp->conversion = 'p';
break;
case 'n':
#ifdef HAVE_LONG_LONG
if (flags >= 16 || (flags & 4))
type = TYPE_COUNT_LONGLONGINT_POINTER;
else
#endif
if (flags >= 8)
type = TYPE_COUNT_LONGINT_POINTER;
else if (flags & 2)
type = TYPE_COUNT_SCHAR_POINTER;
else if (flags & 1)
type = TYPE_COUNT_SHORT_POINTER;
else
type = TYPE_COUNT_INT_POINTER;
break;
case '%':
type = TYPE_NONE;
break;
default:
/* Unknown conversion character. */
goto error;
}
}
if (type != TYPE_NONE) {
dp->arg_index = arg_index;
if (dp->arg_index < 0)
dp->arg_index = arg_posn++;
REGISTER_ARG (dp->arg_index, type);
}
dp->conversion = c;
dp->dir_end = cp;
}
d->count++;
if (d->count >= d_allocated) {
char_directive *memory;
d_allocated = 2 * d_allocated;
memory = realloc (d->dir, d_allocated * sizeof (char_directive));
if (memory == NULL)
/* Out of memory. */
goto error;
d->dir = memory;
}
}
}
d->dir[d->count].dir_start = cp;
d->max_width_length = max_width_length;
d->max_precision_length = max_precision_length;
return 0;
error:
if (a->arg)
free (a->arg);
if (d->dir)
free (d->dir);
return -1;
}
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