diff options
Diffstat (limited to 'REORG.TODO/stdio-common/printf-parsemb.c')
| -rw-r--r-- | REORG.TODO/stdio-common/printf-parsemb.c | 408 |
1 files changed, 408 insertions, 0 deletions
diff --git a/REORG.TODO/stdio-common/printf-parsemb.c b/REORG.TODO/stdio-common/printf-parsemb.c new file mode 100644 index 0000000000..a42336c538 --- /dev/null +++ b/REORG.TODO/stdio-common/printf-parsemb.c @@ -0,0 +1,408 @@ +/* Helper functions for parsing printf format strings. + Copyright (C) 1995-2017 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 + <http://www.gnu.org/licenses/>. */ + +#include <ctype.h> +#include <limits.h> +#include <stdlib.h> +#include <string.h> +#include <sys/param.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) +# define HANDLE_REGISTERED_MODIFIER __handle_registered_modifier_mb +#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) +# define HANDLE_REGISTERED_MODIFIER __handle_registered_modifier_wc +#endif + +#include "printf-parse.h" + +#define NDEBUG 1 +#include <assert.h> + + + +/* 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) +#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.extra = 0; + spec->info.pad = ' '; + spec->info.wide = sizeof (UCHAR_T) > 1; + spec->info.is_binary128 = 0; + + /* Test for positional argument. */ + if (ISDIGIT (*format)) + { + const UCHAR_T *begin = format; + + n = read_int (&format); + + if (n != 0 && *format == L_('$')) + /* Is positional parameter. */ + { + ++format; /* Skip the '$'. */ + if (n != -1) + { + 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_('$')) + { + if (n != -1) + { + spec->width_arg = n - 1; + *max_ref_arg = MAX (*max_ref_arg, n); + } + ++format; /* Skip '$'. */ + } + } + + 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)) + { + int n = read_int (&format); + + /* Constant width specification. */ + if (n != -1) + spec->info.width = n; + } + /* 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_('$')) + { + if (n != -1) + { + 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)) + { + int n = read_int (&format); + + if (n != -1) + spec->info.prec = n; + } + 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; + spec->info.user = 0; + + if (__builtin_expect (__printf_modifier_table == NULL, 1) + || __printf_modifier_table[*format] == NULL + || HANDLE_REGISTERED_MODIFIER (&format, &spec->info) != 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++; + spec->size = -1; + if (__builtin_expect (__printf_function_table == NULL, 1) + || 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. If + the call returns -1 we continue with the normal specifiers. */ + || (int) (spec->ndata_args = (*__printf_arginfo_table[spec->info.spec]) + (&spec->info, 1, &spec->data_arg_type, + &spec->size)) < 0) + { + /* 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); +#endif + } + + return nargs; +} |