/* Internal header for parsing printf format strings.
- Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1995-2021 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
-#include <ctype.h>
#include <printf.h>
-#include <string.h>
+#include <stdint.h>
#include <stddef.h>
-
-#define NDEBUG 1
-#include <assert.h>
+#include <string.h>
+#include <wchar.h>
struct printf_spec
/* Pointers into the format string for the end of this format
spec and the next (or to the end of the string if no more). */
- const char *end_of_fmt, *next_fmt;
+ const UCHAR_T *end_of_fmt, *next_fmt;
/* Position of arguments for precision and width, or -1 if `info' has
the constant value. */
int data_arg_type; /* Type of first argument. */
/* Number of arguments consumed by this format specifier. */
size_t ndata_args;
+ /* Size of the parameter for PA_USER type. */
+ int size;
};
/* The various kinds off arguments that can be passed to printf. */
union printf_arg
{
- unsigned char pa_char;
wchar_t pa_wchar;
- short int pa_short_int;
int pa_int;
long int pa_long_int;
long long int pa_long_long_int;
- unsigned short int pa_u_short_int;
unsigned int pa_u_int;
unsigned long int pa_u_long_int;
unsigned long long int pa_u_long_long_int;
- float pa_float;
double pa_double;
long double pa_long_double;
+#if __HAVE_FLOAT128_UNLIKE_LDBL
+ _Float128 pa_float128;
+#endif
const char *pa_string;
const wchar_t *pa_wstring;
void *pa_pointer;
+ void *pa_user;
};
+#ifndef DONT_NEED_READ_INT
/* Read a simple integer from a string and update the string pointer.
It is assumed that the first character is a digit. */
-static inline unsigned int
+static int
read_int (const UCHAR_T * *pstr)
{
- unsigned int retval = **pstr - L_('0');
+ int retval = **pstr - L_('0');
while (ISDIGIT (*++(*pstr)))
- {
- retval *= 10;
- retval += **pstr - L_('0');
- }
+ if (retval >= 0)
+ {
+ if (INT_MAX / 10 < retval)
+ retval = -1;
+ else
+ {
+ int digit = **pstr - L_('0');
+
+ retval *= 10;
+ if (INT_MAX - digit < retval)
+ retval = -1;
+ else
+ retval += digit;
+ }
+ }
return retval;
}
+#endif
+/* These are defined in reg-printf.c. */
+extern printf_arginfo_size_function **__printf_arginfo_table attribute_hidden;
+extern printf_function **__printf_function_table attribute_hidden;
+extern printf_va_arg_function **__printf_va_arg_table attribute_hidden;
+
/* Find the next spec in FORMAT, or the end of the string. Returns
a pointer into FORMAT, to a '%' or a '\0'. */
-static inline const char *
-find_spec (const char *format, mbstate_t *ps)
+__extern_always_inline const unsigned char *
+__find_specmb (const unsigned char *format)
{
- while (*format != '\0' && *format != '%')
- {
- int len;
-
- /* Remove any hints of a wrong encoding. */
- ps->count = 0;
- if (isascii (*format) || (len = mbrlen (format, MB_CUR_MAX, ps)) <= 0)
- ++format;
- else
- format += len;
- }
- return format;
+ return (const unsigned char *) __strchrnul ((const char *) format, '%');
}
-
-/* This is defined in reg-printf.c. */
-extern printf_arginfo_function **__printf_arginfo_table;
+__extern_always_inline const unsigned int *
+__find_specwc (const unsigned int *format)
+{
+ return (const unsigned int *) __wcschrnul ((const wchar_t *) format, L'%');
+}
/* FORMAT must point to a '%' at the beginning of a spec. Fills in *SPEC
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. */
-static inline size_t
-parse_one_spec (const UCHAR_T *format, size_t posn, struct printf_spec *spec,
- size_t *max_ref_arg, mbstate_t *ps)
-{
- 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.pad = ' ';
+extern size_t __parse_one_specmb (const unsigned char *format, size_t posn,
+ struct printf_spec *spec,
+ size_t *max_ref_arg) attribute_hidden;
- /* Test for positional argument. */
- if (ISDIGIT (*format))
- {
- const UCHAR_T *begin = format;
+extern size_t __parse_one_specwc (const unsigned int *format, size_t posn,
+ struct printf_spec *spec,
+ size_t *max_ref_arg) attribute_hidden;
- 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. */
- while (*format == L_(' ') || *format == L_('+') || *format == L_('-') ||
- *format == L_('#') || *format == L_('0') || *format == L_('\''))
- switch (*format++)
- {
- case L_(' '):
- /* Output a space in place of a sign, when there is no sign. */
- spec->info.space = 1;
- break;
- case L_('+'):
- /* Always output + or - for numbers. */
- spec->info.showsign = 1;
- break;
- case L_('-'):
- /* Left-justify things. */
- spec->info.left = 1;
- break;
- case L_('#'):
- /* Use the "alternate form":
- Hex has 0x or 0X, FP always has a decimal point. */
- spec->info.alt = 1;
- break;
- case L_('0'):
- /* Pad with 0s. */
- spec->info.pad = '0';
- break;
- case L_('\''):
- /* Show grouping in numbers if the locale information
- indicates any. */
- spec->info.group = 1;
- break;
- }
- 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);
+/* This variable is defined in reg-modifier.c. */
+struct printf_modifier_record;
+extern struct printf_modifier_record **__printf_modifier_table
+ attribute_hidden;
- 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. */
-#define is_longlong is_long_double
- spec->info.is_long_double = 0;
- spec->info.is_short = 0;
- spec->info.is_long = 0;
-
- if (*format == L_('h') || *format == L_('l') || *format == L_('L') ||
- *format == L_('Z') || *format == L_('q'))
- switch (*format++)
- {
- case L_('h'):
- /* int's are short int's. */
- spec->info.is_short = 1;
- break;
- case L_('l'):
- /* int's are long int's. */
- spec->info.is_long = 1;
- if (*format != L_('l'))
- break;
- ++format;
- /* FALLTHROUGH */
- case L_('L'):
- /* double's are long double's, and int's are long long int's. */
- case L_('q'):
- /* 4.4 uses this for long long. */
- spec->info.is_long_double = 1;
- break;
- case L_('Z'):
- /* int's are size_t's. */
- assert (sizeof(size_t) <= sizeof(unsigned long long int));
- spec->info.is_longlong = sizeof(size_t) > sizeof(unsigned long int);
- spec->info.is_long = sizeof(size_t) > sizeof(unsigned int);
- break;
- }
-
- /* Get the format specification. */
- spec->info.spec = (wchar_t) *format++;
- if (__printf_arginfo_table != NULL &&
- __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 (spec->info.is_longlong)
- spec->data_arg_type = PA_INT|PA_FLAG_LONG_LONG;
- else 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
- spec->data_arg_type = PA_INT;
- break;
- case L'e':
- case L'E':
- case L'f':
- case L'g':
- case L'G':
- 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;
- posn += spec->ndata_args;
- 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;
- spec->next_fmt = find_spec (format, ps);
- }
-
- return nargs;
-}
+/* Handle registered modifiers. */
+extern int __handle_registered_modifier_mb (const unsigned char **format,
+ struct printf_info *info)
+ attribute_hidden;
+extern int __handle_registered_modifier_wc (const unsigned int **format,
+ struct printf_info *info)
+ attribute_hidden;
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