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-rw-r--r--stdio-common/printf-parsemb.c407
1 files changed, 407 insertions, 0 deletions
diff --git a/stdio-common/printf-parsemb.c b/stdio-common/printf-parsemb.c
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+++ b/stdio-common/printf-parsemb.c
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+/* Internal header for parsing printf format strings.
+ Copyright (C) 1995-1999, 2000, 2002, 2003 Free Software Foundation, Inc.
+ This file is part of th GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <ctype.h>
+#include <limits.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
+#ifndef COMPILE_WPRINTF
+# define CHAR_T char
+# define UCHAR_T unsigned char
+# define INT_T int
+# define L_(Str) Str
+# define ISDIGIT(Ch) isdigit (Ch)
+#else
+# define CHAR_T wchar_t
+# define UCHAR_T unsigned int
+# define INT_T wint_t
+# define L_(Str) L##Str
+# define ISDIGIT(Ch) iswdigit (Ch)
+#endif
+
+#include "printf-parse.h"
+
+#define NDEBUG 1
+#include <assert.h>
+
+
+
+/* Find the next spec in FORMAT, or the end of the string. Returns
+ a pointer into FORMAT, to a '%' or a '\0'. */
+const UCHAR_T *
+#ifdef COMPILE_WPRINTF
+__find_specwc (const UCHAR_T *format)
+#else
+__find_specmb (const UCHAR_T *format, mbstate_t *ps)
+#endif
+{
+#ifdef COMPILE_WPRINTF
+ return (const UCHAR_T *) __wcschrnul ((const CHAR_T *) format, L'%');
+#else
+ while (*format != L_('\0') && *format != L_('%'))
+ {
+ int len;
+
+ /* Remove any hints of a wrong encoding. */
+ ps->__count = 0;
+ if (! isascii (*format) && (len = __mbrlen (format, MB_CUR_MAX, ps)) > 0)
+ format += len;
+ else
+ ++format;
+ }
+ return format;
+#endif
+}
+
+
+/* FORMAT must point to a '%' at the beginning of a spec. Fills in *SPEC
+ with the parsed details. POSN is the number of arguments already
+ consumed. At most MAXTYPES - POSN types are filled in TYPES. Return
+ the number of args consumed by this spec; *MAX_REF_ARG is updated so it
+ remains the highest argument index used. */
+size_t
+attribute_hidden
+#ifdef COMPILE_WPRINTF
+__parse_one_specwc (const UCHAR_T *format, size_t posn,
+ struct printf_spec *spec, size_t *max_ref_arg)
+#else
+__parse_one_specmb (const UCHAR_T *format, size_t posn,
+ struct printf_spec *spec, size_t *max_ref_arg,
+ mbstate_t *ps)
+#endif
+{
+ unsigned int n;
+ size_t nargs = 0;
+
+ /* Skip the '%'. */
+ ++format;
+
+ /* Clear information structure. */
+ spec->data_arg = -1;
+ spec->info.alt = 0;
+ spec->info.space = 0;
+ spec->info.left = 0;
+ spec->info.showsign = 0;
+ spec->info.group = 0;
+ spec->info.i18n = 0;
+ spec->info.pad = ' ';
+ spec->info.wide = sizeof (UCHAR_T) > 1;
+
+ /* Test for positional argument. */
+ if (ISDIGIT (*format))
+ {
+ const UCHAR_T *begin = format;
+
+ n = read_int (&format);
+
+ if (n > 0 && *format == L_('$'))
+ /* Is positional parameter. */
+ {
+ ++format; /* Skip the '$'. */
+ spec->data_arg = n - 1;
+ *max_ref_arg = MAX (*max_ref_arg, n);
+ }
+ else
+ /* Oops; that was actually the width and/or 0 padding flag.
+ Step back and read it again. */
+ format = begin;
+ }
+
+ /* Check for spec modifiers. */
+ do
+ {
+ switch (*format)
+ {
+ case L_(' '):
+ /* Output a space in place of a sign, when there is no sign. */
+ spec->info.space = 1;
+ continue;
+ case L_('+'):
+ /* Always output + or - for numbers. */
+ spec->info.showsign = 1;
+ continue;
+ case L_('-'):
+ /* Left-justify things. */
+ spec->info.left = 1;
+ continue;
+ case L_('#'):
+ /* Use the "alternate form":
+ Hex has 0x or 0X, FP always has a decimal point. */
+ spec->info.alt = 1;
+ continue;
+ case L_('0'):
+ /* Pad with 0s. */
+ spec->info.pad = '0';
+ continue;
+ case L_('\''):
+ /* Show grouping in numbers if the locale information
+ indicates any. */
+ spec->info.group = 1;
+ continue;
+ case L_('I'):
+ /* Use the internationalized form of the output. Currently
+ means to use the `outdigits' of the current locale. */
+ spec->info.i18n = 1;
+ continue;
+ default:
+ break;
+ }
+ break;
+ }
+ while (*++format);
+
+ if (spec->info.left)
+ spec->info.pad = ' ';
+
+ /* Get the field width. */
+ spec->width_arg = -1;
+ spec->info.width = 0;
+ if (*format == L_('*'))
+ {
+ /* The field width is given in an argument.
+ A negative field width indicates left justification. */
+ const UCHAR_T *begin = ++format;
+
+ if (ISDIGIT (*format))
+ {
+ /* The width argument might be found in a positional parameter. */
+ n = read_int (&format);
+
+ if (n > 0 && *format == L_('$'))
+ {
+ spec->width_arg = n - 1;
+ *max_ref_arg = MAX (*max_ref_arg, n);
+ ++format; /* Skip '$'. */
+ }
+ }
+
+ if (spec->width_arg < 0)
+ {
+ /* Not in a positional parameter. Consume one argument. */
+ spec->width_arg = posn++;
+ ++nargs;
+ format = begin; /* Step back and reread. */
+ }
+ }
+ else if (ISDIGIT (*format))
+ /* Constant width specification. */
+ spec->info.width = read_int (&format);
+
+ /* Get the precision. */
+ spec->prec_arg = -1;
+ /* -1 means none given; 0 means explicit 0. */
+ spec->info.prec = -1;
+ if (*format == L_('.'))
+ {
+ ++format;
+ if (*format == L_('*'))
+ {
+ /* The precision is given in an argument. */
+ const UCHAR_T *begin = ++format;
+
+ if (ISDIGIT (*format))
+ {
+ n = read_int (&format);
+
+ if (n > 0 && *format == L_('$'))
+ {
+ spec->prec_arg = n - 1;
+ *max_ref_arg = MAX (*max_ref_arg, n);
+ ++format;
+ }
+ }
+
+ if (spec->prec_arg < 0)
+ {
+ /* Not in a positional parameter. */
+ spec->prec_arg = posn++;
+ ++nargs;
+ format = begin;
+ }
+ }
+ else if (ISDIGIT (*format))
+ spec->info.prec = read_int (&format);
+ else
+ /* "%.?" is treated like "%.0?". */
+ spec->info.prec = 0;
+ }
+
+ /* Check for type modifiers. */
+ spec->info.is_long_double = 0;
+ spec->info.is_short = 0;
+ spec->info.is_long = 0;
+ spec->info.is_char = 0;
+
+ switch (*format++)
+ {
+ case L_('h'):
+ /* ints are short ints or chars. */
+ if (*format != L_('h'))
+ spec->info.is_short = 1;
+ else
+ {
+ ++format;
+ spec->info.is_char = 1;
+ }
+ break;
+ case L_('l'):
+ /* ints are long ints. */
+ spec->info.is_long = 1;
+ if (*format != L_('l'))
+ break;
+ ++format;
+ /* FALLTHROUGH */
+ case L_('L'):
+ /* doubles are long doubles, and ints are long long ints. */
+ case L_('q'):
+ /* 4.4 uses this for long long. */
+ spec->info.is_long_double = 1;
+ break;
+ case L_('z'):
+ case L_('Z'):
+ /* ints are size_ts. */
+ assert (sizeof (size_t) <= sizeof (unsigned long long int));
+#if LONG_MAX != LONG_LONG_MAX
+ spec->info.is_long_double = sizeof (size_t) > sizeof (unsigned long int);
+#endif
+ spec->info.is_long = sizeof (size_t) > sizeof (unsigned int);
+ break;
+ case L_('t'):
+ assert (sizeof (ptrdiff_t) <= sizeof (long long int));
+#if LONG_MAX != LONG_LONG_MAX
+ spec->info.is_long_double = (sizeof (ptrdiff_t) > sizeof (long int));
+#endif
+ spec->info.is_long = sizeof (ptrdiff_t) > sizeof (int);
+ break;
+ case L_('j'):
+ assert (sizeof (uintmax_t) <= sizeof (unsigned long long int));
+#if LONG_MAX != LONG_LONG_MAX
+ spec->info.is_long_double = (sizeof (uintmax_t)
+ > sizeof (unsigned long int));
+#endif
+ spec->info.is_long = sizeof (uintmax_t) > sizeof (unsigned int);
+ break;
+ default:
+ /* Not a recognized modifier. Backup. */
+ --format;
+ break;
+ }
+
+ /* Get the format specification. */
+ spec->info.spec = (wchar_t) *format++;
+ if (__builtin_expect (__printf_function_table != NULL, 0)
+ && spec->info.spec <= UCHAR_MAX
+ && __printf_arginfo_table[spec->info.spec] != NULL)
+ /* We don't try to get the types for all arguments if the format
+ uses more than one. The normal case is covered though. */
+ spec->ndata_args = (*__printf_arginfo_table[spec->info.spec])
+ (&spec->info, 1, &spec->data_arg_type);
+ else
+ {
+ /* Find the data argument types of a built-in spec. */
+ spec->ndata_args = 1;
+
+ switch (spec->info.spec)
+ {
+ case L'i':
+ case L'd':
+ case L'u':
+ case L'o':
+ case L'X':
+ case L'x':
+#if LONG_MAX != LONG_LONG_MAX
+ if (spec->info.is_long_double)
+ spec->data_arg_type = PA_INT|PA_FLAG_LONG_LONG;
+ else
+#endif
+ if (spec->info.is_long)
+ spec->data_arg_type = PA_INT|PA_FLAG_LONG;
+ else if (spec->info.is_short)
+ spec->data_arg_type = PA_INT|PA_FLAG_SHORT;
+ else if (spec->info.is_char)
+ spec->data_arg_type = PA_CHAR;
+ else
+ spec->data_arg_type = PA_INT;
+ break;
+ case L'e':
+ case L'E':
+ case L'f':
+ case L'F':
+ case L'g':
+ case L'G':
+ case L'a':
+ case L'A':
+ if (spec->info.is_long_double)
+ spec->data_arg_type = PA_DOUBLE|PA_FLAG_LONG_DOUBLE;
+ else
+ spec->data_arg_type = PA_DOUBLE;
+ break;
+ case L'c':
+ spec->data_arg_type = PA_CHAR;
+ break;
+ case L'C':
+ spec->data_arg_type = PA_WCHAR;
+ break;
+ case L's':
+ spec->data_arg_type = PA_STRING;
+ break;
+ case L'S':
+ spec->data_arg_type = PA_WSTRING;
+ break;
+ case L'p':
+ spec->data_arg_type = PA_POINTER;
+ break;
+ case L'n':
+ spec->data_arg_type = PA_INT|PA_FLAG_PTR;
+ break;
+
+ case L'm':
+ default:
+ /* An unknown spec will consume no args. */
+ spec->ndata_args = 0;
+ break;
+ }
+ }
+
+ if (spec->data_arg == -1 && spec->ndata_args > 0)
+ {
+ /* There are args consumed, but no positional spec. Use the
+ next sequential arg position. */
+ spec->data_arg = posn;
+ nargs += spec->ndata_args;
+ }
+
+ if (spec->info.spec == L'\0')
+ /* Format ended before this spec was complete. */
+ spec->end_of_fmt = spec->next_fmt = format - 1;
+ else
+ {
+ /* Find the next format spec. */
+ spec->end_of_fmt = format;
+#ifdef COMPILE_WPRINTF
+ spec->next_fmt = __find_specwc (format);
+#else
+ spec->next_fmt = __find_specmb (format, ps);
+#endif
+ }
+
+ return nargs;
+}
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