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434
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1 /* Formatted output to strings.
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2 Copyright (C) 1999-2000, 2002-2003, 2006-2010 Free Software Foundation, Inc.
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3, or (at your option)
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7 any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License along
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15 with this program; if not, write to the Free Software Foundation,
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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17
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18 /* This file can be parametrized with the following macros:
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19 CHAR_T The element type of the format string.
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20 CHAR_T_ONLY_ASCII Set to 1 to enable verification that all characters
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21 in the format string are ASCII.
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22 DIRECTIVE Structure denoting a format directive.
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23 Depends on CHAR_T.
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24 DIRECTIVES Structure denoting the set of format directives of a
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25 format string. Depends on CHAR_T.
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26 PRINTF_PARSE Function that parses a format string.
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27 Depends on CHAR_T.
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28 STATIC Set to 'static' to declare the function static.
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29 ENABLE_UNISTDIO Set to 1 to enable the unistdio extensions. */
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30
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31 #ifndef PRINTF_PARSE
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32 # include <config.h>
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33 #endif
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34
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35 /* Specification. */
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36 #ifndef PRINTF_PARSE
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37 # include "printf-parse.h"
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38 #endif
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39
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40 /* Default parameters. */
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41 #ifndef PRINTF_PARSE
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42 # define PRINTF_PARSE printf_parse
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43 # define CHAR_T char
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44 # define DIRECTIVE char_directive
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45 # define DIRECTIVES char_directives
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46 #endif
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47
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48 /* Get size_t, NULL. */
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49 #include <stddef.h>
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50
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51 /* Get intmax_t. */
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52 #if defined IN_LIBINTL || defined IN_LIBASPRINTF
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53 # if HAVE_STDINT_H_WITH_UINTMAX
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54 # include <stdint.h>
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55 # endif
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56 # if HAVE_INTTYPES_H_WITH_UINTMAX
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57 # include <inttypes.h>
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58 # endif
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59 #else
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60 # include <stdint.h>
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61 #endif
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62
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63 /* malloc(), realloc(), free(). */
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64 #include <stdlib.h>
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65
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66 /* errno. */
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67 #include <errno.h>
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68
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69 /* Checked size_t computations. */
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70 #include "xsize.h"
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71
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72 #if CHAR_T_ONLY_ASCII
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73 /* c_isascii(). */
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74 # include "c-ctype.h"
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75 #endif
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76
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77 #ifdef STATIC
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78 STATIC
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79 #endif
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80 int
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81 PRINTF_PARSE (const CHAR_T *format, DIRECTIVES *d, arguments *a)
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82 {
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83 const CHAR_T *cp = format; /* pointer into format */
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84 size_t arg_posn = 0; /* number of regular arguments consumed */
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85 size_t d_allocated; /* allocated elements of d->dir */
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86 size_t a_allocated; /* allocated elements of a->arg */
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87 size_t max_width_length = 0;
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88 size_t max_precision_length = 0;
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89
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90 d->count = 0;
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91 d_allocated = 1;
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92 d->dir = (DIRECTIVE *) malloc (d_allocated * sizeof (DIRECTIVE));
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93 if (d->dir == NULL)
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94 /* Out of memory. */
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95 goto out_of_memory_1;
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96
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97 a->count = 0;
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98 a_allocated = 0;
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99 a->arg = NULL;
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100
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101 #define REGISTER_ARG(_index_,_type_) \
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102 { \
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103 size_t n = (_index_); \
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104 if (n >= a_allocated) \
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105 { \
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106 size_t memory_size; \
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107 argument *memory; \
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108 \
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109 a_allocated = xtimes (a_allocated, 2); \
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110 if (a_allocated <= n) \
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111 a_allocated = xsum (n, 1); \
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112 memory_size = xtimes (a_allocated, sizeof (argument)); \
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113 if (size_overflow_p (memory_size)) \
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114 /* Overflow, would lead to out of memory. */ \
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115 goto out_of_memory; \
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116 memory = (argument *) (a->arg \
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117 ? realloc (a->arg, memory_size) \
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118 : malloc (memory_size)); \
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119 if (memory == NULL) \
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120 /* Out of memory. */ \
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121 goto out_of_memory; \
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122 a->arg = memory; \
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123 } \
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124 while (a->count <= n) \
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125 a->arg[a->count++].type = TYPE_NONE; \
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126 if (a->arg[n].type == TYPE_NONE) \
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127 a->arg[n].type = (_type_); \
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128 else if (a->arg[n].type != (_type_)) \
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129 /* Ambiguous type for positional argument. */ \
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130 goto error; \
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131 }
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132
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133 while (*cp != '\0')
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134 {
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135 CHAR_T c = *cp++;
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136 if (c == '%')
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137 {
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138 size_t arg_index = ARG_NONE;
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139 DIRECTIVE *dp = &d->dir[d->count]; /* pointer to next directive */
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140
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141 /* Initialize the next directive. */
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142 dp->dir_start = cp - 1;
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143 dp->flags = 0;
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144 dp->width_start = NULL;
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145 dp->width_end = NULL;
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146 dp->width_arg_index = ARG_NONE;
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147 dp->precision_start = NULL;
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148 dp->precision_end = NULL;
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149 dp->precision_arg_index = ARG_NONE;
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150 dp->arg_index = ARG_NONE;
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151
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152 /* Test for positional argument. */
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153 if (*cp >= '0' && *cp <= '9')
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154 {
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155 const CHAR_T *np;
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156
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157 for (np = cp; *np >= '0' && *np <= '9'; np++)
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158 ;
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159 if (*np == '$')
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160 {
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161 size_t n = 0;
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162
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163 for (np = cp; *np >= '0' && *np <= '9'; np++)
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164 n = xsum (xtimes (n, 10), *np - '0');
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165 if (n == 0)
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166 /* Positional argument 0. */
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167 goto error;
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168 if (size_overflow_p (n))
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169 /* n too large, would lead to out of memory later. */
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170 goto error;
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171 arg_index = n - 1;
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172 cp = np + 1;
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173 }
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174 }
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175
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176 /* Read the flags. */
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177 for (;;)
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178 {
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179 if (*cp == '\'')
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180 {
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181 dp->flags |= FLAG_GROUP;
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182 cp++;
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183 }
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184 else if (*cp == '-')
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185 {
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186 dp->flags |= FLAG_LEFT;
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187 cp++;
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188 }
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189 else if (*cp == '+')
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190 {
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191 dp->flags |= FLAG_SHOWSIGN;
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192 cp++;
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193 }
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194 else if (*cp == ' ')
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195 {
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196 dp->flags |= FLAG_SPACE;
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197 cp++;
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198 }
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199 else if (*cp == '#')
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200 {
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201 dp->flags |= FLAG_ALT;
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202 cp++;
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203 }
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204 else if (*cp == '0')
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205 {
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206 dp->flags |= FLAG_ZERO;
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207 cp++;
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208 }
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209 else
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210 break;
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211 }
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212
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213 /* Parse the field width. */
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214 if (*cp == '*')
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215 {
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216 dp->width_start = cp;
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217 cp++;
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218 dp->width_end = cp;
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219 if (max_width_length < 1)
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220 max_width_length = 1;
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221
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222 /* Test for positional argument. */
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223 if (*cp >= '0' && *cp <= '9')
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224 {
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225 const CHAR_T *np;
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226
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227 for (np = cp; *np >= '0' && *np <= '9'; np++)
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228 ;
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229 if (*np == '$')
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230 {
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231 size_t n = 0;
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232
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233 for (np = cp; *np >= '0' && *np <= '9'; np++)
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234 n = xsum (xtimes (n, 10), *np - '0');
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235 if (n == 0)
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236 /* Positional argument 0. */
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237 goto error;
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238 if (size_overflow_p (n))
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239 /* n too large, would lead to out of memory later. */
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240 goto error;
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241 dp->width_arg_index = n - 1;
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242 cp = np + 1;
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243 }
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244 }
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245 if (dp->width_arg_index == ARG_NONE)
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246 {
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247 dp->width_arg_index = arg_posn++;
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248 if (dp->width_arg_index == ARG_NONE)
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249 /* arg_posn wrapped around. */
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250 goto error;
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251 }
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252 REGISTER_ARG (dp->width_arg_index, TYPE_INT);
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253 }
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254 else if (*cp >= '0' && *cp <= '9')
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255 {
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256 size_t width_length;
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257
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258 dp->width_start = cp;
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259 for (; *cp >= '0' && *cp <= '9'; cp++)
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260 ;
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261 dp->width_end = cp;
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262 width_length = dp->width_end - dp->width_start;
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263 if (max_width_length < width_length)
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264 max_width_length = width_length;
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265 }
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266
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267 /* Parse the precision. */
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268 if (*cp == '.')
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269 {
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270 cp++;
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271 if (*cp == '*')
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272 {
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273 dp->precision_start = cp - 1;
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274 cp++;
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275 dp->precision_end = cp;
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276 if (max_precision_length < 2)
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277 max_precision_length = 2;
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278
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279 /* Test for positional argument. */
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280 if (*cp >= '0' && *cp <= '9')
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281 {
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282 const CHAR_T *np;
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283
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284 for (np = cp; *np >= '0' && *np <= '9'; np++)
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285 ;
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286 if (*np == '$')
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287 {
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288 size_t n = 0;
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289
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290 for (np = cp; *np >= '0' && *np <= '9'; np++)
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291 n = xsum (xtimes (n, 10), *np - '0');
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292 if (n == 0)
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293 /* Positional argument 0. */
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294 goto error;
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295 if (size_overflow_p (n))
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296 /* n too large, would lead to out of memory
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297 later. */
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298 goto error;
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299 dp->precision_arg_index = n - 1;
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300 cp = np + 1;
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301 }
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302 }
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303 if (dp->precision_arg_index == ARG_NONE)
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304 {
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305 dp->precision_arg_index = arg_posn++;
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306 if (dp->precision_arg_index == ARG_NONE)
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307 /* arg_posn wrapped around. */
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308 goto error;
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309 }
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310 REGISTER_ARG (dp->precision_arg_index, TYPE_INT);
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311 }
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312 else
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313 {
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314 size_t precision_length;
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315
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316 dp->precision_start = cp - 1;
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317 for (; *cp >= '0' && *cp <= '9'; cp++)
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318 ;
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319 dp->precision_end = cp;
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320 precision_length = dp->precision_end - dp->precision_start;
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321 if (max_precision_length < precision_length)
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322 max_precision_length = precision_length;
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323 }
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324 }
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325
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326 {
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327 arg_type type;
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328
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329 /* Parse argument type/size specifiers. */
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330 {
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331 int flags = 0;
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332
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333 for (;;)
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334 {
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335 if (*cp == 'h')
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336 {
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337 flags |= (1 << (flags & 1));
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338 cp++;
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339 }
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340 else if (*cp == 'L')
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341 {
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342 flags |= 4;
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343 cp++;
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344 }
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345 else if (*cp == 'l')
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346 {
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347 flags += 8;
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348 cp++;
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349 }
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350 else if (*cp == 'j')
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351 {
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352 if (sizeof (intmax_t) > sizeof (long))
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353 {
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354 /* intmax_t = long long */
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355 flags += 16;
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356 }
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357 else if (sizeof (intmax_t) > sizeof (int))
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358 {
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359 /* intmax_t = long */
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360 flags += 8;
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361 }
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362 cp++;
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363 }
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364 else if (*cp == 'z' || *cp == 'Z')
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365 {
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366 /* 'z' is standardized in ISO C 99, but glibc uses 'Z'
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367 because the warning facility in gcc-2.95.2 understands
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368 only 'Z' (see gcc-2.95.2/gcc/c-common.c:1784). */
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369 if (sizeof (size_t) > sizeof (long))
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370 {
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371 /* size_t = long long */
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372 flags += 16;
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373 }
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374 else if (sizeof (size_t) > sizeof (int))
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375 {
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376 /* size_t = long */
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377 flags += 8;
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378 }
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379 cp++;
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380 }
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381 else if (*cp == 't')
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382 {
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383 if (sizeof (ptrdiff_t) > sizeof (long))
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384 {
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385 /* ptrdiff_t = long long */
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386 flags += 16;
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387 }
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388 else if (sizeof (ptrdiff_t) > sizeof (int))
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389 {
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390 /* ptrdiff_t = long */
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391 flags += 8;
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392 }
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393 cp++;
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394 }
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395 #if defined __APPLE__ && defined __MACH__
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396 /* On MacOS X 10.3, PRIdMAX is defined as "qd".
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397 We cannot change it to "lld" because PRIdMAX must also
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398 be understood by the system's printf routines. */
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399 else if (*cp == 'q')
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400 {
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401 if (64 / 8 > sizeof (long))
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402 {
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403 /* int64_t = long long */
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404 flags += 16;
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405 }
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406 else
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407 {
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408 /* int64_t = long */
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409 flags += 8;
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410 }
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411 cp++;
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412 }
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413 #endif
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414 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
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415 /* On native Win32, PRIdMAX is defined as "I64d".
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416 We cannot change it to "lld" because PRIdMAX must also
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417 be understood by the system's printf routines. */
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418 else if (*cp == 'I' && cp[1] == '6' && cp[2] == '4')
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419 {
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420 if (64 / 8 > sizeof (long))
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421 {
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422 /* __int64 = long long */
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423 flags += 16;
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424 }
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425 else
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426 {
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427 /* __int64 = long */
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428 flags += 8;
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429 }
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430 cp += 3;
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431 }
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432 #endif
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433 else
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434 break;
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435 }
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436
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437 /* Read the conversion character. */
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438 c = *cp++;
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439 switch (c)
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440 {
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441 case 'd': case 'i':
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|
|
442 #if HAVE_LONG_LONG_INT
|
|
|
443 /* If 'long long' exists and is larger than 'long': */
|
|
|
444 if (flags >= 16 || (flags & 4))
|
|
|
445 type = TYPE_LONGLONGINT;
|
|
|
446 else
|
|
|
447 #endif
|
|
|
448 /* If 'long long' exists and is the same as 'long', we parse
|
|
|
449 "lld" into TYPE_LONGINT. */
|
|
|
450 if (flags >= 8)
|
|
|
451 type = TYPE_LONGINT;
|
|
|
452 else if (flags & 2)
|
|
|
453 type = TYPE_SCHAR;
|
|
|
454 else if (flags & 1)
|
|
|
455 type = TYPE_SHORT;
|
|
|
456 else
|
|
|
457 type = TYPE_INT;
|
|
|
458 break;
|
|
|
459 case 'o': case 'u': case 'x': case 'X':
|
|
|
460 #if HAVE_LONG_LONG_INT
|
|
|
461 /* If 'long long' exists and is larger than 'long': */
|
|
|
462 if (flags >= 16 || (flags & 4))
|
|
|
463 type = TYPE_ULONGLONGINT;
|
|
|
464 else
|
|
|
465 #endif
|
|
|
466 /* If 'unsigned long long' exists and is the same as
|
|
|
467 'unsigned long', we parse "llu" into TYPE_ULONGINT. */
|
|
|
468 if (flags >= 8)
|
|
|
469 type = TYPE_ULONGINT;
|
|
|
470 else if (flags & 2)
|
|
|
471 type = TYPE_UCHAR;
|
|
|
472 else if (flags & 1)
|
|
|
473 type = TYPE_USHORT;
|
|
|
474 else
|
|
|
475 type = TYPE_UINT;
|
|
|
476 break;
|
|
|
477 case 'f': case 'F': case 'e': case 'E': case 'g': case 'G':
|
|
|
478 case 'a': case 'A':
|
|
|
479 if (flags >= 16 || (flags & 4))
|
|
|
480 type = TYPE_LONGDOUBLE;
|
|
|
481 else
|
|
|
482 type = TYPE_DOUBLE;
|
|
|
483 break;
|
|
|
484 case 'c':
|
|
|
485 if (flags >= 8)
|
|
|
486 #if HAVE_WINT_T
|
|
|
487 type = TYPE_WIDE_CHAR;
|
|
|
488 #else
|
|
|
489 goto error;
|
|
|
490 #endif
|
|
|
491 else
|
|
|
492 type = TYPE_CHAR;
|
|
|
493 break;
|
|
|
494 #if HAVE_WINT_T
|
|
|
495 case 'C':
|
|
|
496 type = TYPE_WIDE_CHAR;
|
|
|
497 c = 'c';
|
|
|
498 break;
|
|
|
499 #endif
|
|
|
500 case 's':
|
|
|
501 if (flags >= 8)
|
|
|
502 #if HAVE_WCHAR_T
|
|
|
503 type = TYPE_WIDE_STRING;
|
|
|
504 #else
|
|
|
505 goto error;
|
|
|
506 #endif
|
|
|
507 else
|
|
|
508 type = TYPE_STRING;
|
|
|
509 break;
|
|
|
510 #if HAVE_WCHAR_T
|
|
|
511 case 'S':
|
|
|
512 type = TYPE_WIDE_STRING;
|
|
|
513 c = 's';
|
|
|
514 break;
|
|
|
515 #endif
|
|
|
516 case 'p':
|
|
|
517 type = TYPE_POINTER;
|
|
|
518 break;
|
|
|
519 case 'n':
|
|
|
520 #if HAVE_LONG_LONG_INT
|
|
|
521 /* If 'long long' exists and is larger than 'long': */
|
|
|
522 if (flags >= 16 || (flags & 4))
|
|
|
523 type = TYPE_COUNT_LONGLONGINT_POINTER;
|
|
|
524 else
|
|
|
525 #endif
|
|
|
526 /* If 'long long' exists and is the same as 'long', we parse
|
|
|
527 "lln" into TYPE_COUNT_LONGINT_POINTER. */
|
|
|
528 if (flags >= 8)
|
|
|
529 type = TYPE_COUNT_LONGINT_POINTER;
|
|
|
530 else if (flags & 2)
|
|
|
531 type = TYPE_COUNT_SCHAR_POINTER;
|
|
|
532 else if (flags & 1)
|
|
|
533 type = TYPE_COUNT_SHORT_POINTER;
|
|
|
534 else
|
|
|
535 type = TYPE_COUNT_INT_POINTER;
|
|
|
536 break;
|
|
|
537 #if ENABLE_UNISTDIO
|
|
|
538 /* The unistdio extensions. */
|
|
|
539 case 'U':
|
|
|
540 if (flags >= 16)
|
|
|
541 type = TYPE_U32_STRING;
|
|
|
542 else if (flags >= 8)
|
|
|
543 type = TYPE_U16_STRING;
|
|
|
544 else
|
|
|
545 type = TYPE_U8_STRING;
|
|
|
546 break;
|
|
|
547 #endif
|
|
|
548 case '%':
|
|
|
549 type = TYPE_NONE;
|
|
|
550 break;
|
|
|
551 default:
|
|
|
552 /* Unknown conversion character. */
|
|
|
553 goto error;
|
|
|
554 }
|
|
|
555 }
|
|
|
556
|
|
|
557 if (type != TYPE_NONE)
|
|
|
558 {
|
|
|
559 dp->arg_index = arg_index;
|
|
|
560 if (dp->arg_index == ARG_NONE)
|
|
|
561 {
|
|
|
562 dp->arg_index = arg_posn++;
|
|
|
563 if (dp->arg_index == ARG_NONE)
|
|
|
564 /* arg_posn wrapped around. */
|
|
|
565 goto error;
|
|
|
566 }
|
|
|
567 REGISTER_ARG (dp->arg_index, type);
|
|
|
568 }
|
|
|
569 dp->conversion = c;
|
|
|
570 dp->dir_end = cp;
|
|
|
571 }
|
|
|
572
|
|
|
573 d->count++;
|
|
|
574 if (d->count >= d_allocated)
|
|
|
575 {
|
|
|
576 size_t memory_size;
|
|
|
577 DIRECTIVE *memory;
|
|
|
578
|
|
|
579 d_allocated = xtimes (d_allocated, 2);
|
|
|
580 memory_size = xtimes (d_allocated, sizeof (DIRECTIVE));
|
|
|
581 if (size_overflow_p (memory_size))
|
|
|
582 /* Overflow, would lead to out of memory. */
|
|
|
583 goto out_of_memory;
|
|
|
584 memory = (DIRECTIVE *) realloc (d->dir, memory_size);
|
|
|
585 if (memory == NULL)
|
|
|
586 /* Out of memory. */
|
|
|
587 goto out_of_memory;
|
|
|
588 d->dir = memory;
|
|
|
589 }
|
|
|
590 }
|
|
|
591 #if CHAR_T_ONLY_ASCII
|
|
|
592 else if (!c_isascii (c))
|
|
|
593 {
|
|
|
594 /* Non-ASCII character. Not supported. */
|
|
|
595 goto error;
|
|
|
596 }
|
|
|
597 #endif
|
|
|
598 }
|
|
|
599 d->dir[d->count].dir_start = cp;
|
|
|
600
|
|
|
601 d->max_width_length = max_width_length;
|
|
|
602 d->max_precision_length = max_precision_length;
|
|
|
603 return 0;
|
|
|
604
|
|
|
605 error:
|
|
|
606 if (a->arg)
|
|
|
607 free (a->arg);
|
|
|
608 if (d->dir)
|
|
|
609 free (d->dir);
|
|
|
610 errno = EINVAL;
|
|
|
611 return -1;
|
|
|
612
|
|
|
613 out_of_memory:
|
|
|
614 if (a->arg)
|
|
|
615 free (a->arg);
|
|
|
616 if (d->dir)
|
|
|
617 free (d->dir);
|
|
|
618 out_of_memory_1:
|
|
|
619 errno = ENOMEM;
|
|
|
620 return -1;
|
|
|
621 }
|
|
|
622
|
|
|
623 #undef PRINTF_PARSE
|
|
|
624 #undef DIRECTIVES
|
|
|
625 #undef DIRECTIVE
|
|
|
626 #undef CHAR_T_ONLY_ASCII
|
|
|
627 #undef CHAR_T
|
