/* Copyright (C) 1991-2023 Free Software Foundation, Inc. This file is part of the 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 . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include <_itoa.h> #include #include #include #include #include #include #include /* This code is shared between the standard stdio implementation found in GNU C library and the libio implementation originally found in GNU libg++. Beside this it is also shared between the normal and wide character implementation as defined in ISO/IEC 9899:1990/Amendment 1:1995. */ #include #ifdef COMPILE_WPRINTF #include #endif #define ARGCHECK(S, Format) \ do \ { \ /* Check file argument for consistence. */ \ CHECK_FILE (S, -1); \ if (S->_flags & _IO_NO_WRITES) \ { \ S->_flags |= _IO_ERR_SEEN; \ __set_errno (EBADF); \ return -1; \ } \ if (Format == NULL) \ { \ __set_errno (EINVAL); \ return -1; \ } \ } while (0) #define UNBUFFERED_P(S) ((S)->_flags & _IO_UNBUFFERED) #if __HAVE_FLOAT128_UNLIKE_LDBL # define PARSE_FLOAT_VA_ARG_EXTENDED(INFO) \ do \ { \ if (is_long_double \ && (mode_flags & PRINTF_LDBL_USES_FLOAT128) != 0) \ { \ INFO.is_binary128 = 1; \ the_arg.pa_float128 = va_arg (ap, _Float128); \ } \ else \ { \ PARSE_FLOAT_VA_ARG (INFO); \ } \ } \ while (0) #else # define PARSE_FLOAT_VA_ARG_EXTENDED(INFO) \ PARSE_FLOAT_VA_ARG (INFO); #endif #define PARSE_FLOAT_VA_ARG(INFO) \ do \ { \ INFO.is_binary128 = 0; \ if (is_long_double) \ the_arg.pa_long_double = va_arg (ap, long double); \ else \ the_arg.pa_double = va_arg (ap, double); \ } \ while (0) #if __HAVE_FLOAT128_UNLIKE_LDBL # define SETUP_FLOAT128_INFO(INFO) \ do \ { \ if ((mode_flags & PRINTF_LDBL_USES_FLOAT128) != 0) \ INFO.is_binary128 = is_long_double; \ else \ INFO.is_binary128 = 0; \ } \ while (0) #else # define SETUP_FLOAT128_INFO(INFO) \ do \ { \ INFO.is_binary128 = 0; \ } \ while (0) #endif #ifndef COMPILE_WPRINTF # include "printf_buffer-char.h" # define vfprintf __vfprintf_internal # define OTHER_CHAR_T wchar_t # define UCHAR_T unsigned char # define INT_T int typedef const char *THOUSANDS_SEP_T; # define L_(Str) Str # define ISDIGIT(Ch) ((unsigned int) ((Ch) - '0') < 10) # define STR_LEN(Str) strlen (Str) # define ORIENT if (_IO_vtable_offset (s) == 0 && _IO_fwide (s, -1) != -1)\ return -1 # define CONVERT_FROM_OTHER_STRING __wcsrtombs #else # include "printf_buffer-wchar_t.h" # define vfprintf __vfwprintf_internal # define OTHER_CHAR_T char /* This is a hack!!! There should be a type uwchar_t. */ # define UCHAR_T unsigned int /* uwchar_t */ # define INT_T wint_t typedef wchar_t THOUSANDS_SEP_T; # define L_(Str) L##Str # define ISDIGIT(Ch) ((unsigned int) ((Ch) - L'0') < 10) # define STR_LEN(Str) __wcslen (Str) # include <_itowa.h> # define ORIENT if (_IO_fwide (s, 1) != 1) return -1 # define CONVERT_FROM_OTHER_STRING __mbsrtowcs # undef _itoa # define _itoa(Val, Buf, Base, Case) _itowa (Val, Buf, Base, Case) # define _itoa_word(Val, Buf, Base, Case) _itowa_word (Val, Buf, Base, Case) # undef EOF # define EOF WEOF #endif /* Include the shared code for parsing the format string. */ #include "printf-parse.h" /* Write the string SRC to S. If PREC is non-negative, write at most PREC bytes. If LEFT is true, perform left justification. */ static void outstring_converted_wide_string (struct Xprintf_buffer *target, const OTHER_CHAR_T *src, int prec, int width, bool left) { /* Use a small buffer to combine processing of multiple characters. CONVERT_FROM_OTHER_STRING expects the buffer size in (wide) characters, and buf_length counts that. */ enum { buf_length = 256 / sizeof (CHAR_T) }; CHAR_T buf[buf_length]; _Static_assert (sizeof (buf) > MB_LEN_MAX, "buffer is large enough for a single multi-byte character"); /* Add the initial padding if needed. */ if (width > 0 && !left) { /* Make a first pass to find the output width, so that we can add the required padding. */ mbstate_t mbstate = { 0 }; const OTHER_CHAR_T *src_copy = src; size_t total_written; if (prec < 0) total_written = CONVERT_FROM_OTHER_STRING (NULL, &src_copy, 0, &mbstate); else { /* The source might not be null-terminated. Enforce the limit manually, based on the output length. */ total_written = 0; size_t limit = prec; while (limit > 0 && src_copy != NULL) { size_t write_limit = buf_length; if (write_limit > limit) write_limit = limit; size_t written = CONVERT_FROM_OTHER_STRING (buf, &src_copy, write_limit, &mbstate); if (written == (size_t) -1) { Xprintf_buffer_mark_failed (target); return; } if (written == 0) break; total_written += written; limit -= written; } } /* Output initial padding. */ Xprintf_buffer_pad (target, L_(' '), width - total_written); if (Xprintf_buffer_has_failed (target)) return; } /* Convert the input string, piece by piece. */ size_t total_written = 0; { mbstate_t mbstate = { 0 }; /* If prec is negative, remaining is not decremented, otherwise, it serves as the write limit. */ size_t remaining = -1; if (prec >= 0) remaining = prec; while (remaining > 0 && src != NULL) { size_t write_limit = buf_length; if (remaining < write_limit) write_limit = remaining; size_t written = CONVERT_FROM_OTHER_STRING (buf, &src, write_limit, &mbstate); if (written == (size_t) -1) { Xprintf_buffer_mark_failed (target); return; } if (written == 0) break; Xprintf_buffer_write (target, buf, written); total_written += written; if (prec >= 0) remaining -= written; } } /* Add final padding. */ if (width > 0 && left) Xprintf_buffer_pad (target, L_(' '), width - total_written); } /* Calls __printf_fp or __printf_fphex based on the value of the format specifier INFO->spec. */ static inline void __printf_fp_spec (struct Xprintf_buffer *target, const struct printf_info *info, const void *const *args) { if (info->spec == 'a' || info->spec == 'A') Xprintf (fphex_l_buffer) (target, _NL_CURRENT_LOCALE, info, args); else Xprintf (fp_l_buffer) (target, _NL_CURRENT_LOCALE, info, args); } /* For handling long_double and longlong we use the same flag. If `long' and `long long' are effectively the same type define it to zero. */ #if LONG_MAX == LONG_LONG_MAX # define is_longlong 0 #else # define is_longlong is_long_double #endif /* If `long' and `int' is effectively the same type we don't have to handle `long separately. */ #if INT_MAX == LONG_MAX # define is_long_num 0 #else # define is_long_num is_long #endif /* Global constants. */ static const CHAR_T null[] = L_("(null)"); /* Size of the work_buffer variable (in characters, not bytes. */ enum { WORK_BUFFER_SIZE = 1000 / sizeof (CHAR_T) }; /* This table maps a character into a number representing a class. In each step there is a destination label for each class. */ static const uint8_t jump_table[] = { /* ' ' */ 1, 0, 0, /* '#' */ 4, 0, /* '%' */ 14, 0, /* '\''*/ 6, 0, 0, /* '*' */ 7, /* '+' */ 2, 0, /* '-' */ 3, /* '.' */ 9, 0, /* '0' */ 5, /* '1' */ 8, /* '2' */ 8, /* '3' */ 8, /* '4' */ 8, /* '5' */ 8, /* '6' */ 8, /* '7' */ 8, /* '8' */ 8, /* '9' */ 8, 0, 0, 0, 0, 0, 0, 0, /* 'A' */ 26, /* 'B' */ 30, /* 'C' */ 25, 0, /* 'E' */ 19, /* F */ 19, /* 'G' */ 19, 0, /* 'I' */ 29, 0, 0, /* 'L' */ 12, 0, 0, 0, 0, 0, 0, /* 'S' */ 21, 0, 0, 0, 0, /* 'X' */ 18, 0, /* 'Z' */ 13, 0, 0, 0, 0, 0, 0, /* 'a' */ 26, /* 'b' */ 30, /* 'c' */ 20, /* 'd' */ 15, /* 'e' */ 19, /* 'f' */ 19, /* 'g' */ 19, /* 'h' */ 10, /* 'i' */ 15, /* 'j' */ 28, 0, /* 'l' */ 11, /* 'm' */ 24, /* 'n' */ 23, /* 'o' */ 17, /* 'p' */ 22, /* 'q' */ 12, 0, /* 's' */ 21, /* 't' */ 27, /* 'u' */ 16, 0, /* 'w' */ 31, /* 'x' */ 18, 0, /* 'z' */ 13 }; #define NOT_IN_JUMP_RANGE(Ch) ((Ch) < L_(' ') || (Ch) > L_('z')) #define CHAR_CLASS(Ch) (jump_table[(INT_T) (Ch) - L_(' ')]) #define LABEL(Name) do_##Name #ifdef SHARED /* 'int' is enough and it saves some space on 64 bit systems. */ # define JUMP_TABLE_TYPE const int # define JUMP_TABLE_BASE_LABEL do_form_unknown # define REF(Name) &&do_##Name - &&JUMP_TABLE_BASE_LABEL # define JUMP(ChExpr, table) \ do \ { \ int offset; \ void *ptr; \ spec = (ChExpr); \ offset = NOT_IN_JUMP_RANGE (spec) ? REF (form_unknown) \ : table[CHAR_CLASS (spec)]; \ ptr = &&JUMP_TABLE_BASE_LABEL + offset; \ goto *ptr; \ } \ while (0) #else # define JUMP_TABLE_TYPE const void *const # define REF(Name) &&do_##Name # define JUMP(ChExpr, table) \ do \ { \ const void *ptr; \ spec = (ChExpr); \ ptr = NOT_IN_JUMP_RANGE (spec) ? REF (form_unknown) \ : table[CHAR_CLASS (spec)]; \ goto *ptr; \ } \ while (0) #endif #define STEP0_3_TABLE \ /* Step 0: at the beginning. */ \ static JUMP_TABLE_TYPE step0_jumps[32] = \ { \ REF (form_unknown), \ REF (flag_space), /* for ' ' */ \ REF (flag_plus), /* for '+' */ \ REF (flag_minus), /* for '-' */ \ REF (flag_hash), /* for '' */ \ REF (flag_zero), /* for '0' */ \ REF (flag_quote), /* for '\'' */ \ REF (width_asterics), /* for '*' */ \ REF (width), /* for '1'...'9' */ \ REF (precision), /* for '.' */ \ REF (mod_half), /* for 'h' */ \ REF (mod_long), /* for 'l' */ \ REF (mod_longlong), /* for 'L', 'q' */ \ REF (mod_size_t), /* for 'z', 'Z' */ \ REF (form_percent), /* for '%' */ \ REF (form_integer), /* for 'd', 'i' */ \ REF (form_unsigned), /* for 'u' */ \ REF (form_octal), /* for 'o' */ \ REF (form_hexa), /* for 'X', 'x' */ \ REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \ REF (form_character), /* for 'c' */ \ REF (form_string), /* for 's', 'S' */ \ REF (form_pointer), /* for 'p' */ \ REF (form_number), /* for 'n' */ \ REF (form_strerror), /* for 'm' */ \ REF (form_wcharacter), /* for 'C' */ \ REF (form_floathex), /* for 'A', 'a' */ \ REF (mod_ptrdiff_t), /* for 't' */ \ REF (mod_intmax_t), /* for 'j' */ \ REF (flag_i18n), /* for 'I' */ \ REF (form_binary), /* for 'B', 'b' */ \ REF (mod_bitwidth), /* for 'w' */ \ }; \ /* Step 1: after processing width. */ \ static JUMP_TABLE_TYPE step1_jumps[32] = \ { \ REF (form_unknown), \ REF (form_unknown), /* for ' ' */ \ REF (form_unknown), /* for '+' */ \ REF (form_unknown), /* for '-' */ \ REF (form_unknown), /* for '' */ \ REF (form_unknown), /* for '0' */ \ REF (form_unknown), /* for '\'' */ \ REF (form_unknown), /* for '*' */ \ REF (form_unknown), /* for '1'...'9' */ \ REF (precision), /* for '.' */ \ REF (mod_half), /* for 'h' */ \ REF (mod_long), /* for 'l' */ \ REF (mod_longlong), /* for 'L', 'q' */ \ REF (mod_size_t), /* for 'z', 'Z' */ \ REF (form_percent), /* for '%' */ \ REF (form_integer), /* for 'd', 'i' */ \ REF (form_unsigned), /* for 'u' */ \ REF (form_octal), /* for 'o' */ \ REF (form_hexa), /* for 'X', 'x' */ \ REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \ REF (form_character), /* for 'c' */ \ REF (form_string), /* for 's', 'S' */ \ REF (form_pointer), /* for 'p' */ \ REF (form_number), /* for 'n' */ \ REF (form_strerror), /* for 'm' */ \ REF (form_wcharacter), /* for 'C' */ \ REF (form_floathex), /* for 'A', 'a' */ \ REF (mod_ptrdiff_t), /* for 't' */ \ REF (mod_intmax_t), /* for 'j' */ \ REF (form_unknown), /* for 'I' */ \ REF (form_binary), /* for 'B', 'b' */ \ REF (mod_bitwidth), /* for 'w' */ \ }; \ /* Step 2: after processing precision. */ \ static JUMP_TABLE_TYPE step2_jumps[32] = \ { \ REF (form_unknown), \ REF (form_unknown), /* for ' ' */ \ REF (form_unknown), /* for '+' */ \ REF (form_unknown), /* for '-' */ \ REF (form_unknown), /* for '' */ \ REF (form_unknown), /* for '0' */ \ REF (form_unknown), /* for '\'' */ \ REF (form_unknown), /* for '*' */ \ REF (form_unknown), /* for '1'...'9' */ \ REF (form_unknown), /* for '.' */ \ REF (mod_half), /* for 'h' */ \ REF (mod_long), /* for 'l' */ \ REF (mod_longlong), /* for 'L', 'q' */ \ REF (mod_size_t), /* for 'z', 'Z' */ \ REF (form_percent), /* for '%' */ \ REF (form_integer), /* for 'd', 'i' */ \ REF (form_unsigned), /* for 'u' */ \ REF (form_octal), /* for 'o' */ \ REF (form_hexa), /* for 'X', 'x' */ \ REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \ REF (form_character), /* for 'c' */ \ REF (form_string), /* for 's', 'S' */ \ REF (form_pointer), /* for 'p' */ \ REF (form_number), /* for 'n' */ \ REF (form_strerror), /* for 'm' */ \ REF (form_wcharacter), /* for 'C' */ \ REF (form_floathex), /* for 'A', 'a' */ \ REF (mod_ptrdiff_t), /* for 't' */ \ REF (mod_intmax_t), /* for 'j' */ \ REF (form_unknown), /* for 'I' */ \ REF (form_binary), /* for 'B', 'b' */ \ REF (mod_bitwidth), /* for 'w' */ \ }; \ /* Step 3a: after processing first 'h' modifier. */ \ static JUMP_TABLE_TYPE step3a_jumps[32] = \ { \ REF (form_unknown), \ REF (form_unknown), /* for ' ' */ \ REF (form_unknown), /* for '+' */ \ REF (form_unknown), /* for '-' */ \ REF (form_unknown), /* for '' */ \ REF (form_unknown), /* for '0' */ \ REF (form_unknown), /* for '\'' */ \ REF (form_unknown), /* for '*' */ \ REF (form_unknown), /* for '1'...'9' */ \ REF (form_unknown), /* for '.' */ \ REF (mod_halfhalf), /* for 'h' */ \ REF (form_unknown), /* for 'l' */ \ REF (form_unknown), /* for 'L', 'q' */ \ REF (form_unknown), /* for 'z', 'Z' */ \ REF (form_percent), /* for '%' */ \ REF (form_integer), /* for 'd', 'i' */ \ REF (form_unsigned), /* for 'u' */ \ REF (form_octal), /* for 'o' */ \ REF (form_hexa), /* for 'X', 'x' */ \ REF (form_unknown), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \ REF (form_unknown), /* for 'c' */ \ REF (form_unknown), /* for 's', 'S' */ \ REF (form_unknown), /* for 'p' */ \ REF (form_number), /* for 'n' */ \ REF (form_unknown), /* for 'm' */ \ REF (form_unknown), /* for 'C' */ \ REF (form_unknown), /* for 'A', 'a' */ \ REF (form_unknown), /* for 't' */ \ REF (form_unknown), /* for 'j' */ \ REF (form_unknown), /* for 'I' */ \ REF (form_binary), /* for 'B', 'b' */ \ REF (form_unknown), /* for 'w' */ \ }; \ /* Step 3b: after processing first 'l' modifier. */ \ static JUMP_TABLE_TYPE step3b_jumps[32] = \ { \ REF (form_unknown), \ REF (form_unknown), /* for ' ' */ \ REF (form_unknown), /* for '+' */ \ REF (form_unknown), /* for '-' */ \ REF (form_unknown), /* for '' */ \ REF (form_unknown), /* for '0' */ \ REF (form_unknown), /* for '\'' */ \ REF (form_unknown), /* for '*' */ \ REF (form_unknown), /* for '1'...'9' */ \ REF (form_unknown), /* for '.' */ \ REF (form_unknown), /* for 'h' */ \ REF (mod_longlong), /* for 'l' */ \ REF (form_unknown), /* for 'L', 'q' */ \ REF (form_unknown), /* for 'z', 'Z' */ \ REF (form_percent), /* for '%' */ \ REF (form_integer), /* for 'd', 'i' */ \ REF (form_unsigned), /* for 'u' */ \ REF (form_octal), /* for 'o' */ \ REF (form_hexa), /* for 'X', 'x' */ \ REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \ REF (form_character), /* for 'c' */ \ REF (form_string), /* for 's', 'S' */ \ REF (form_pointer), /* for 'p' */ \ REF (form_number), /* for 'n' */ \ REF (form_strerror), /* for 'm' */ \ REF (form_wcharacter), /* for 'C' */ \ REF (form_floathex), /* for 'A', 'a' */ \ REF (form_unknown), /* for 't' */ \ REF (form_unknown), /* for 'j' */ \ REF (form_unknown), /* for 'I' */ \ REF (form_binary), /* for 'B', 'b' */ \ REF (form_unknown), /* for 'w' */ \ } #define STEP4_TABLE \ /* Step 4: processing format specifier. */ \ static JUMP_TABLE_TYPE step4_jumps[32] = \ { \ REF (form_unknown), \ REF (form_unknown), /* for ' ' */ \ REF (form_unknown), /* for '+' */ \ REF (form_unknown), /* for '-' */ \ REF (form_unknown), /* for '' */ \ REF (form_unknown), /* for '0' */ \ REF (form_unknown), /* for '\'' */ \ REF (form_unknown), /* for '*' */ \ REF (form_unknown), /* for '1'...'9' */ \ REF (form_unknown), /* for '.' */ \ REF (form_unknown), /* for 'h' */ \ REF (form_unknown), /* for 'l' */ \ REF (form_unknown), /* for 'L', 'q' */ \ REF (form_unknown), /* for 'z', 'Z' */ \ REF (form_percent), /* for '%' */ \ REF (form_integer), /* for 'd', 'i' */ \ REF (form_unsigned), /* for 'u' */ \ REF (form_octal), /* for 'o' */ \ REF (form_hexa), /* for 'X', 'x' */ \ REF (form_float), /* for 'E', 'e', 'F', 'f', 'G', 'g' */ \ REF (form_character), /* for 'c' */ \ REF (form_string), /* for 's', 'S' */ \ REF (form_pointer), /* for 'p' */ \ REF (form_number), /* for 'n' */ \ REF (form_strerror), /* for 'm' */ \ REF (form_wcharacter), /* for 'C' */ \ REF (form_floathex), /* for 'A', 'a' */ \ REF (form_unknown), /* for 't' */ \ REF (form_unknown), /* for 'j' */ \ REF (form_unknown), /* for 'I' */ \ REF (form_binary), /* for 'B', 'b' */ \ REF (form_unknown), /* for 'w' */ \ } /* Handle positional format specifiers. */ static void printf_positional (struct Xprintf_buffer *buf, const CHAR_T *format, int readonly_format, va_list ap, va_list *ap_savep, int nspecs_done, const UCHAR_T *lead_str_end, CHAR_T *work_buffer, int save_errno, const char *grouping, THOUSANDS_SEP_T thousands_sep, unsigned int mode_flags); /* Handle unknown format specifier. */ static void printf_unknown (struct Xprintf_buffer *, const struct printf_info *) __THROW; static void group_number (struct Xprintf_buffer *buf, struct grouping_iterator *iter, CHAR_T *from, CHAR_T *to, THOUSANDS_SEP_T thousands_sep, bool i18n); /* The buffer-based function itself. */ void Xprintf_buffer (struct Xprintf_buffer *buf, const CHAR_T *format, va_list ap, unsigned int mode_flags) { /* The character used as thousands separator. */ THOUSANDS_SEP_T thousands_sep = 0; /* The string describing the size of groups of digits. */ const char *grouping; /* Current character in format string. */ const UCHAR_T *f; /* End of leading constant string. */ const UCHAR_T *lead_str_end; /* Points to next format specifier. */ const UCHAR_T *end_of_spec; /* Buffer intermediate results. */ CHAR_T work_buffer[WORK_BUFFER_SIZE]; CHAR_T *workend; /* We have to save the original argument pointer. */ va_list ap_save; /* Count number of specifiers we already processed. */ int nspecs_done; /* For the %m format we may need the current `errno' value. */ int save_errno = errno; /* 1 if format is in read-only memory, -1 if it is in writable memory, 0 if unknown. */ int readonly_format = 0; /* Initialize local variables. */ grouping = (const char *) -1; #ifdef __va_copy /* This macro will be available soon in gcc's . We need it since on some systems `va_list' is not an integral type. */ __va_copy (ap_save, ap); #else ap_save = ap; #endif nspecs_done = 0; #ifdef COMPILE_WPRINTF /* Find the first format specifier. */ f = lead_str_end = __find_specwc ((const UCHAR_T *) format); #else /* Find the first format specifier. */ f = lead_str_end = __find_specmb ((const UCHAR_T *) format); #endif /* Write the literal text before the first format. */ Xprintf_buffer_write (buf, format, lead_str_end - (const UCHAR_T *) format); if (Xprintf_buffer_has_failed (buf)) return; /* If we only have to print a simple string, return now. */ if (*f == L_('\0')) return; /* Use the slow path in case any printf handler is registered. */ if (__glibc_unlikely (__printf_function_table != NULL || __printf_modifier_table != NULL || __printf_va_arg_table != NULL)) goto do_positional; /* Process whole format string. */ do { STEP0_3_TABLE; STEP4_TABLE; int is_negative; /* Flag for negative number. */ union { unsigned long long int longlong; unsigned long int word; } number; int base; union printf_arg the_arg; CHAR_T *string; /* Pointer to argument string. */ int alt = 0; /* Alternate format. */ int space = 0; /* Use space prefix if no sign is needed. */ int left = 0; /* Left-justify output. */ int showsign = 0; /* Always begin with plus or minus sign. */ int group = 0; /* Print numbers according grouping rules. */ /* Argument is long double/long long int. Only used if double/long double or long int/long long int are distinct. */ int is_long_double __attribute__ ((unused)) = 0; int is_short = 0; /* Argument is short int. */ int is_long = 0; /* Argument is long int. */ int is_char = 0; /* Argument is promoted (unsigned) char. */ int width = 0; /* Width of output; 0 means none specified. */ int prec = -1; /* Precision of output; -1 means none specified. */ /* This flag is set by the 'I' modifier and selects the use of the `outdigits' as determined by the current locale. */ int use_outdigits = 0; UCHAR_T pad = L_(' ');/* Padding character. */ CHAR_T spec; workend = work_buffer + WORK_BUFFER_SIZE; /* Get current character in format string. */ JUMP (*++f, step0_jumps); /* ' ' flag. */ LABEL (flag_space): space = 1; JUMP (*++f, step0_jumps); /* '+' flag. */ LABEL (flag_plus): showsign = 1; JUMP (*++f, step0_jumps); /* The '-' flag. */ LABEL (flag_minus): left = 1; pad = L_(' '); JUMP (*++f, step0_jumps); /* The '#' flag. */ LABEL (flag_hash): alt = 1; JUMP (*++f, step0_jumps); /* The '0' flag. */ LABEL (flag_zero): if (!left) pad = L_('0'); JUMP (*++f, step0_jumps); /* The '\'' flag. */ LABEL (flag_quote): group = 1; if (grouping == (const char *) -1) { #ifdef COMPILE_WPRINTF thousands_sep = _NL_CURRENT_WORD (LC_NUMERIC, _NL_NUMERIC_THOUSANDS_SEP_WC); #else thousands_sep = _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP); #endif grouping = _NL_CURRENT (LC_NUMERIC, GROUPING); if (*grouping == '\0' || *grouping == CHAR_MAX #ifdef COMPILE_WPRINTF || thousands_sep == L'\0' #else || *thousands_sep == '\0' #endif ) grouping = NULL; } JUMP (*++f, step0_jumps); LABEL (flag_i18n): use_outdigits = 1; JUMP (*++f, step0_jumps); /* Get width from argument. */ LABEL (width_asterics): { const UCHAR_T *tmp; /* Temporary value. */ tmp = ++f; if (ISDIGIT (*tmp)) { int pos = read_int (&tmp); if (pos == -1) { __set_errno (EOVERFLOW); Xprintf_buffer_mark_failed (buf); goto all_done; } if (pos && *tmp == L_('$')) /* The width comes from a positional parameter. */ goto do_positional; } width = va_arg (ap, int); /* Negative width means left justified. */ if (width < 0) { width = -width; pad = L_(' '); left = 1; } } JUMP (*f, step1_jumps); /* Given width in format string. */ LABEL (width): width = read_int (&f); if (__glibc_unlikely (width == -1)) { __set_errno (EOVERFLOW); Xprintf_buffer_mark_failed (buf); goto all_done; } if (*f == L_('$')) /* Oh, oh. The argument comes from a positional parameter. */ goto do_positional; JUMP (*f, step1_jumps); LABEL (precision): ++f; if (*f == L_('*')) { const UCHAR_T *tmp; /* Temporary value. */ tmp = ++f; if (ISDIGIT (*tmp)) { int pos = read_int (&tmp); if (pos == -1) { __set_errno (EOVERFLOW); Xprintf_buffer_mark_failed (buf); goto all_done; } if (pos && *tmp == L_('$')) /* The precision comes from a positional parameter. */ goto do_positional; } prec = va_arg (ap, int); /* If the precision is negative the precision is omitted. */ if (prec < 0) prec = -1; } else if (ISDIGIT (*f)) { prec = read_int (&f); /* The precision was specified in this case as an extremely large positive value. */ if (prec == -1) { __set_errno (EOVERFLOW); Xprintf_buffer_mark_failed (buf); goto all_done; } } else prec = 0; JUMP (*f, step2_jumps); /* Process 'h' modifier. There might another 'h' following. */ LABEL (mod_half): is_short = 1; JUMP (*++f, step3a_jumps); /* Process 'hh' modifier. */ LABEL (mod_halfhalf): is_short = 0; is_char = 1; JUMP (*++f, step4_jumps); /* Process 'l' modifier. There might another 'l' following. */ LABEL (mod_long): is_long = 1; JUMP (*++f, step3b_jumps); /* Process 'L', 'q', or 'll' modifier. No other modifier is allowed to follow. */ LABEL (mod_longlong): is_long_double = 1; is_long = 1; JUMP (*++f, step4_jumps); LABEL (mod_size_t): is_long_double = sizeof (size_t) > sizeof (unsigned long int); is_long = sizeof (size_t) > sizeof (unsigned int); JUMP (*++f, step4_jumps); LABEL (mod_ptrdiff_t): is_long_double = sizeof (ptrdiff_t) > sizeof (unsigned long int); is_long = sizeof (ptrdiff_t) > sizeof (unsigned int); JUMP (*++f, step4_jumps); LABEL (mod_intmax_t): is_long_double = sizeof (intmax_t) > sizeof (unsigned long int); is_long = sizeof (intmax_t) > sizeof (unsigned int); JUMP (*++f, step4_jumps); /* Process 'wN' or 'wfN' modifier. */ LABEL (mod_bitwidth): ++f; bool is_fast = false; if (*f == L_('f')) { ++f; is_fast = true; } int bitwidth = 0; if (ISDIGIT (*f)) bitwidth = read_int (&f); if (is_fast) switch (bitwidth) { case 8: bitwidth = INT_FAST8_WIDTH; break; case 16: bitwidth = INT_FAST16_WIDTH; break; case 32: bitwidth = INT_FAST32_WIDTH; break; case 64: bitwidth = INT_FAST64_WIDTH; break; } switch (bitwidth) { case 8: is_char = 1; break; case 16: is_short = 1; break; case 32: break; case 64: is_long_double = 1; is_long = 1; break; default: /* ISO C requires this error to be detected. */ __set_errno (EINVAL); Xprintf_buffer_mark_failed (buf); goto all_done; } JUMP (*f, step4_jumps); /* Process current format. */ while (1) { #define process_arg_int() va_arg (ap, int) #define process_arg_long_int() va_arg (ap, long int) #define process_arg_long_long_int() va_arg (ap, long long int) #define process_arg_pointer() va_arg (ap, void *) #define process_arg_string() va_arg (ap, const char *) #define process_arg_unsigned_int() va_arg (ap, unsigned int) #define process_arg_unsigned_long_int() va_arg (ap, unsigned long int) #define process_arg_unsigned_long_long_int() va_arg (ap, unsigned long long int) #define process_arg_wchar_t() va_arg (ap, wchar_t) #define process_arg_wstring() va_arg (ap, const wchar_t *) #include "vfprintf-process-arg.c" #undef process_arg_int #undef process_arg_long_int #undef process_arg_long_long_int #undef process_arg_pointer #undef process_arg_string #undef process_arg_unsigned_int #undef process_arg_unsigned_long_int #undef process_arg_unsigned_long_long_int #undef process_arg_wchar_t #undef process_arg_wstring LABEL (form_float): LABEL (form_floathex): { if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0)) is_long_double = 0; struct printf_info info = { .prec = prec, .width = width, .spec = spec, .is_long_double = is_long_double, .is_short = is_short, .is_long = is_long, .alt = alt, .space = space, .left = left, .showsign = showsign, .group = group, .pad = pad, .extra = 0, .i18n = use_outdigits, .wide = sizeof (CHAR_T) != 1, .is_binary128 = 0 }; PARSE_FLOAT_VA_ARG_EXTENDED (info); const void *ptr = &the_arg; __printf_fp_spec (buf, &info, &ptr); } break; LABEL (form_unknown): if (spec == L_('\0')) { /* The format string ended before the specifier is complete. */ __set_errno (EINVAL); Xprintf_buffer_mark_failed (buf); goto all_done; } /* If we are in the fast loop force entering the complicated one. */ goto do_positional; } /* The format is correctly handled. */ ++nspecs_done; /* Look for next format specifier. */ #ifdef COMPILE_WPRINTF f = __find_specwc ((end_of_spec = ++f)); #else f = __find_specmb ((end_of_spec = ++f)); #endif /* Write the following constant string. */ Xprintf_buffer_write (buf, (const CHAR_T *) end_of_spec, f - end_of_spec); } while (*f != L_('\0') && !Xprintf_buffer_has_failed (buf)); all_done: /* printf_positional performs cleanup under its all_done label, so vfprintf-process-arg.c uses it for this function and printf_positional below. */ return; /* Hand off processing for positional parameters. */ do_positional: printf_positional (buf, format, readonly_format, ap, &ap_save, nspecs_done, lead_str_end, work_buffer, save_errno, grouping, thousands_sep, mode_flags); } static void printf_positional (struct Xprintf_buffer * buf, const CHAR_T *format, int readonly_format, va_list ap, va_list *ap_savep, int nspecs_done, const UCHAR_T *lead_str_end, CHAR_T *work_buffer, int save_errno, const char *grouping, THOUSANDS_SEP_T thousands_sep, unsigned int mode_flags) { /* For positional argument handling. */ struct scratch_buffer specsbuf; scratch_buffer_init (&specsbuf); struct printf_spec *specs = specsbuf.data; size_t specs_limit = specsbuf.length / sizeof (specs[0]); /* Used as a backing store for args_value, args_size, args_type below. */ struct scratch_buffer argsbuf; scratch_buffer_init (&argsbuf); /* Array with information about the needed arguments. This has to be dynamically extensible. */ size_t nspecs = 0; /* The number of arguments the format string requests. This will determine the size of the array needed to store the argument attributes. */ size_t nargs = 0; /* Positional parameters refer to arguments directly. This could also determine the maximum number of arguments. Track the maximum number. */ size_t max_ref_arg = 0; /* Just a counter. */ size_t cnt; if (grouping == (const char *) -1) { #ifdef COMPILE_WPRINTF thousands_sep = _NL_CURRENT_WORD (LC_NUMERIC, _NL_NUMERIC_THOUSANDS_SEP_WC); #else thousands_sep = _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP); #endif grouping = _NL_CURRENT (LC_NUMERIC, GROUPING); if (*grouping == '\0' || *grouping == CHAR_MAX) grouping = NULL; } for (const UCHAR_T *f = lead_str_end; *f != L_('\0'); f = specs[nspecs++].next_fmt) { if (nspecs == specs_limit) { if (!scratch_buffer_grow_preserve (&specsbuf)) { Xprintf_buffer_mark_failed (buf); goto all_done; } specs = specsbuf.data; specs_limit = specsbuf.length / sizeof (specs[0]); } /* Parse the format specifier. */ bool failed; #ifdef COMPILE_WPRINTF nargs += __parse_one_specwc (f, nargs, &specs[nspecs], &max_ref_arg, &failed); #else nargs += __parse_one_specmb (f, nargs, &specs[nspecs], &max_ref_arg, &failed); #endif if (failed) { Xprintf_buffer_mark_failed (buf); goto all_done; } } /* Determine the number of arguments the format string consumes. */ nargs = MAX (nargs, max_ref_arg); union printf_arg *args_value; int *args_size; int *args_type; void *args_pa_user; size_t args_pa_user_offset; { /* Calculate total size needed to represent a single argument across all three argument-related arrays. */ size_t bytes_per_arg = sizeof (*args_value) + sizeof (*args_size) + sizeof (*args_type); if (!scratch_buffer_set_array_size (&argsbuf, nargs, bytes_per_arg)) { Xprintf_buffer_mark_failed (buf); goto all_done; } args_value = argsbuf.data; /* Set up the remaining two arrays to each point past the end of the prior array, since space for all three has been allocated now. */ args_size = &args_value[nargs].pa_int; args_type = &args_size[nargs]; args_pa_user = &args_type[nargs]; memset (args_type, (mode_flags & PRINTF_FORTIFY) != 0 ? '\xff' : '\0', nargs * sizeof (*args_type)); } /* XXX Could do sanity check here: If any element in ARGS_TYPE is still zero after this loop, format is invalid. For now we simply use 0 as the value. */ /* Fill in the types of all the arguments. */ for (cnt = 0; cnt < nspecs; ++cnt) { /* If the width is determined by an argument this is an int. */ if (specs[cnt].width_arg != -1) args_type[specs[cnt].width_arg] = PA_INT; /* If the precision is determined by an argument this is an int. */ if (specs[cnt].prec_arg != -1) args_type[specs[cnt].prec_arg] = PA_INT; switch (specs[cnt].ndata_args) { case 0: /* No arguments. */ break; case 1: /* One argument; we already have the type and size. */ args_type[specs[cnt].data_arg] = specs[cnt].data_arg_type; args_size[specs[cnt].data_arg] = specs[cnt].size; break; default: /* We have more than one argument for this format spec. We must call the arginfo function again to determine all the types. */ (void) (*__printf_arginfo_table[specs[cnt].info.spec]) (&specs[cnt].info, specs[cnt].ndata_args, &args_type[specs[cnt].data_arg], &args_size[specs[cnt].data_arg]); break; } } /* Now we know all the types and the order. Fill in the argument values. */ for (cnt = 0; cnt < nargs; ++cnt) switch (args_type[cnt]) { #define T(tag, mem, type) \ case tag: \ args_value[cnt].mem = va_arg (*ap_savep, type); \ break T (PA_WCHAR, pa_wchar, wint_t); case PA_CHAR: /* Promoted. */ case PA_INT|PA_FLAG_SHORT: /* Promoted. */ #if LONG_MAX == INT_MAX case PA_INT|PA_FLAG_LONG: #endif T (PA_INT, pa_int, int); #if LONG_MAX == LONG_LONG_MAX case PA_INT|PA_FLAG_LONG: #endif T (PA_INT|PA_FLAG_LONG_LONG, pa_long_long_int, long long int); #if LONG_MAX != INT_MAX && LONG_MAX != LONG_LONG_MAX # error "he?" #endif case PA_FLOAT: /* Promoted. */ T (PA_DOUBLE, pa_double, double); case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0)) { args_value[cnt].pa_double = va_arg (*ap_savep, double); args_type[cnt] &= ~PA_FLAG_LONG_DOUBLE; } #if __HAVE_FLOAT128_UNLIKE_LDBL else if ((mode_flags & PRINTF_LDBL_USES_FLOAT128) != 0) args_value[cnt].pa_float128 = va_arg (*ap_savep, _Float128); #endif else args_value[cnt].pa_long_double = va_arg (*ap_savep, long double); break; case PA_STRING: /* All pointers are the same */ case PA_WSTRING: /* All pointers are the same */ T (PA_POINTER, pa_pointer, void *); #undef T default: if ((args_type[cnt] & PA_FLAG_PTR) != 0) args_value[cnt].pa_pointer = va_arg (*ap_savep, void *); else if (__glibc_unlikely (__printf_va_arg_table != NULL) && __printf_va_arg_table[args_type[cnt] - PA_LAST] != NULL) { while (args_pa_user + args_size[cnt] > argsbuf.data + argsbuf.length) { args_pa_user_offset = args_pa_user - (void *) &args_type[nargs]; if (!scratch_buffer_grow_preserve (&argsbuf)) { Xprintf_buffer_mark_failed (buf); goto all_done; } args_value = argsbuf.data; /* Set up the remaining two arrays to each point past the end of the prior array, since space for all three has been allocated now. */ args_size = &args_value[nargs].pa_int; args_type = &args_size[nargs]; args_pa_user = (void *) &args_type[nargs] + args_pa_user_offset; } args_value[cnt].pa_user = args_pa_user; args_pa_user += args_size[cnt]; (*__printf_va_arg_table[args_type[cnt] - PA_LAST]) (args_value[cnt].pa_user, ap_savep); } else memset (&args_value[cnt], 0, sizeof (args_value[cnt])); break; case -1: /* Error case. Not all parameters appear in N$ format strings. We have no way to determine their type. */ assert ((mode_flags & PRINTF_FORTIFY) != 0); __libc_fatal ("*** invalid %N$ use detected ***\n"); } /* Now walk through all format specifiers and process them. */ for (; (size_t) nspecs_done < nspecs && !Xprintf_buffer_has_failed (buf); ++nspecs_done) { STEP4_TABLE; int is_negative; union { unsigned long long int longlong; unsigned long int word; } number; int base; CHAR_T *string; /* Pointer to argument string. */ /* Fill variables from values in struct. */ int alt = specs[nspecs_done].info.alt; int space = specs[nspecs_done].info.space; int left = specs[nspecs_done].info.left; int showsign = specs[nspecs_done].info.showsign; int group = specs[nspecs_done].info.group; int is_long_double __attribute__ ((unused)) = specs[nspecs_done].info.is_long_double; int is_short = specs[nspecs_done].info.is_short; int is_char = specs[nspecs_done].info.is_char; int is_long = specs[nspecs_done].info.is_long; int width = specs[nspecs_done].info.width; int prec = specs[nspecs_done].info.prec; int use_outdigits = specs[nspecs_done].info.i18n; char pad = specs[nspecs_done].info.pad; CHAR_T spec = specs[nspecs_done].info.spec; CHAR_T *workend = work_buffer + WORK_BUFFER_SIZE; /* Fill in last information. */ if (specs[nspecs_done].width_arg != -1) { /* Extract the field width from an argument. */ specs[nspecs_done].info.width = args_value[specs[nspecs_done].width_arg].pa_int; if (specs[nspecs_done].info.width < 0) /* If the width value is negative left justification is selected and the value is taken as being positive. */ { specs[nspecs_done].info.width *= -1; left = specs[nspecs_done].info.left = 1; } width = specs[nspecs_done].info.width; } if (specs[nspecs_done].prec_arg != -1) { /* Extract the precision from an argument. */ specs[nspecs_done].info.prec = args_value[specs[nspecs_done].prec_arg].pa_int; if (specs[nspecs_done].info.prec < 0) /* If the precision is negative the precision is omitted. */ specs[nspecs_done].info.prec = -1; prec = specs[nspecs_done].info.prec; } /* Process format specifiers. */ do { if (spec <= UCHAR_MAX && __printf_function_table != NULL && __printf_function_table[(size_t) spec] != NULL) { int function_done = Xprintf (function_invoke) (buf, __printf_function_table[(size_t) spec], &args_value[specs[nspecs_done] .data_arg], specs[nspecs_done].ndata_args, &specs[nspecs_done].info); if (function_done != -2) { /* If an error occurred we don't have information about # of chars. */ if (function_done < 0) { /* Function has set errno. */ Xprintf_buffer_mark_failed (buf); goto all_done; } break; } } JUMP (spec, step4_jumps); #define process_arg_data args_value[specs[nspecs_done].data_arg] #define process_arg_int() process_arg_data.pa_int #define process_arg_long_int() process_arg_data.pa_long_int #define process_arg_long_long_int() process_arg_data.pa_long_long_int #define process_arg_pointer() process_arg_data.pa_pointer #define process_arg_string() process_arg_data.pa_string #define process_arg_unsigned_int() process_arg_data.pa_u_int #define process_arg_unsigned_long_int() process_arg_data.pa_u_long_int #define process_arg_unsigned_long_long_int() process_arg_data.pa_u_long_long_int #define process_arg_wchar_t() process_arg_data.pa_wchar #define process_arg_wstring() process_arg_data.pa_wstring #include "vfprintf-process-arg.c" #undef process_arg_data #undef process_arg_int #undef process_arg_long_int #undef process_arg_long_long_int #undef process_arg_pointer #undef process_arg_string #undef process_arg_unsigned_int #undef process_arg_unsigned_long_int #undef process_arg_unsigned_long_long_int #undef process_arg_wchar_t #undef process_arg_wstring LABEL (form_float): LABEL (form_floathex): { const void *ptr = (const void *) &args_value[specs[nspecs_done].data_arg]; if (__glibc_unlikely ((mode_flags & PRINTF_LDBL_IS_DBL) != 0)) { specs[nspecs_done].data_arg_type = PA_DOUBLE; specs[nspecs_done].info.is_long_double = 0; } SETUP_FLOAT128_INFO (specs[nspecs_done].info); __printf_fp_spec (buf, &specs[nspecs_done].info, &ptr); } break; LABEL (form_unknown): { printf_unknown (buf, &specs[nspecs_done].info); } break; } while (Xprintf_buffer_has_failed (buf)); /* Write the following constant string. */ Xprintf_buffer_write (buf, (const CHAR_T *) specs[nspecs_done].end_of_fmt, (specs[nspecs_done].next_fmt - specs[nspecs_done].end_of_fmt)); } all_done: scratch_buffer_free (&argsbuf); scratch_buffer_free (&specsbuf); } /* Handle an unknown format specifier. This prints out a canonicalized representation of the format spec itself. */ static void printf_unknown (struct Xprintf_buffer *buf, const struct printf_info *info) { CHAR_T work_buffer[MAX (sizeof (info->width), sizeof (info->prec)) * 3]; CHAR_T *const workend = &work_buffer[sizeof (work_buffer) / sizeof (CHAR_T)]; CHAR_T *w; Xprintf_buffer_putc (buf, L_('%')); if (info->alt) Xprintf_buffer_putc (buf, L_('#')); if (info->group) Xprintf_buffer_putc (buf, L_('\'')); if (info->showsign) Xprintf_buffer_putc (buf, L_('+')); else if (info->space) Xprintf_buffer_putc (buf, L_(' ')); if (info->left) Xprintf_buffer_putc (buf, L_('-')); if (info->pad == L_('0')) Xprintf_buffer_putc (buf, L_('0')); if (info->i18n) Xprintf_buffer_putc (buf, L_('I')); if (info->width != 0) { w = _itoa_word (info->width, workend, 10, 0); while (w < workend) Xprintf_buffer_putc (buf, *w++); } if (info->prec != -1) { Xprintf_buffer_putc (buf, L_('.')); w = _itoa_word (info->prec, workend, 10, 0); while (w < workend) Xprintf_buffer_putc (buf, *w++); } if (info->spec != L_('\0')) Xprintf_buffer_putc (buf, info->spec); } static void group_number (struct Xprintf_buffer *buf, struct grouping_iterator *iter, CHAR_T *from, CHAR_T *to, THOUSANDS_SEP_T thousands_sep, bool i18n) { if (!i18n) for (CHAR_T *cp = from; cp != to; ++cp) { if (__grouping_iterator_next (iter)) { #ifdef COMPILE_WPRINTF __wprintf_buffer_putc (buf, thousands_sep); #else __printf_buffer_puts (buf, thousands_sep); #endif } Xprintf_buffer_putc (buf, *cp); } else { /* Apply digit translation and grouping. */ for (CHAR_T *cp = from; cp != to; ++cp) { if (__grouping_iterator_next (iter)) { #ifdef COMPILE_WPRINTF __wprintf_buffer_putc (buf, thousands_sep); #else __printf_buffer_puts (buf, thousands_sep); #endif } int digit = *cp - '0'; #ifdef COMPILE_WPRINTF __wprintf_buffer_putc (buf, _NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_OUTDIGIT0_WC + digit)); #else __printf_buffer_puts (buf, _NL_CURRENT (LC_CTYPE, _NL_CTYPE_OUTDIGIT0_MB + digit)); #endif } } } /* The FILE-based function. */ int vfprintf (FILE *s, const CHAR_T *format, va_list ap, unsigned int mode_flags) { /* Orient the stream. */ #ifdef ORIENT ORIENT; #endif /* Sanity check of arguments. */ ARGCHECK (s, format); #ifdef ORIENT /* Check for correct orientation. */ if (_IO_vtable_offset (s) == 0 && _IO_fwide (s, sizeof (CHAR_T) == 1 ? -1 : 1) != (sizeof (CHAR_T) == 1 ? -1 : 1)) /* The stream is already oriented otherwise. */ return EOF; #endif if (!_IO_need_lock (s)) { struct Xprintf (buffer_to_file) wrap; Xprintf (buffer_to_file_init) (&wrap, s); Xprintf_buffer (&wrap.base, format, ap, mode_flags); return Xprintf (buffer_to_file_done) (&wrap); } int done; /* Lock stream. */ _IO_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, s); _IO_flockfile (s); /* Set up the wrapping buffer. */ struct Xprintf (buffer_to_file) wrap; Xprintf (buffer_to_file_init) (&wrap, s); /* Perform the printing operation on the buffer. */ Xprintf_buffer (&wrap.base, format, ap, mode_flags); done = Xprintf (buffer_to_file_done) (&wrap); /* Unlock the stream. */ _IO_funlockfile (s); _IO_cleanup_region_end (0); return done; }