/* Internal header for parsing printf format strings. Copyright (C) 1995-2024 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, see <https://www.gnu.org/licenses/>. */ #include <printf.h> #include <stdint.h> #include <stddef.h> #include <string.h> #include <wchar.h> struct printf_spec { /* Information parsed from the format spec. */ struct printf_info info; /* 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 UCHAR_T *end_of_fmt, *next_fmt; /* Position of arguments for precision and width, or -1 if `info' has the constant value. */ int prec_arg, width_arg; int data_arg; /* Position of data argument. */ 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; }; #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 int read_int (const UCHAR_T * *pstr) { int retval = **pstr - L_('0'); while (ISDIGIT (*++(*pstr))) 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 /* Find the next spec in FORMAT, or the end of the string. Returns a pointer into FORMAT, to a '%' or a '\0'. */ __extern_always_inline const unsigned char * __find_specmb (const unsigned char *format) { return (const unsigned char *) __strchrnul ((const char *) format, '%'); } __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 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. *FAILED is set to indicate whether parsing failed and printf should return with an error status. */ extern size_t __parse_one_specmb (const unsigned char *format, size_t posn, struct printf_spec *spec, size_t *max_ref_arg, bool *failed) attribute_hidden; extern size_t __parse_one_specwc (const unsigned int *format, size_t posn, struct printf_spec *spec, size_t *max_ref_arg, bool *failed) attribute_hidden; /* This variable is defined in reg-modifier.c. */ struct printf_modifier_record; extern struct printf_modifier_record **__printf_modifier_table attribute_hidden; /* 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;