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annotate libinterp/corefcn/oct-tex-lexer.in.ll @ 21987:f31f30a9348f

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disable -Wsign-compare for code generated by flex * oct-tex-lexer.in.ll, lex.ll: Use pragma to disable -Wsign-compare warning from GCC.
author John W. Eaton <jwe@octave.org>
date Tue, 28 Jun 2016 13:46:03 -0400
parents aab79a1885cc
children 66f3c4e81721
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2
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4197fc428c7d maint: Update copyright notices for 2015.
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3 Copyright (C) 2013-2015 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 %top {
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24 #if defined (HAVE_CONFIG_H)
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25 #include "config.h"
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26 #endif
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27
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28 #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
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29 // This one needs to be global.
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30 #pragma GCC diagnostic ignored "-Wunused-function"
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31
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32 // Disable these warnings for code that is generated by flex, including
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33 // pattern rules. Push the current state so we can restore the warning
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34 // state prior to functions we define at the bottom of the file.
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35 #pragma GCC diagnostic push
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36 #pragma GCC diagnostic ignored "-Wold-style-cast"
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37 #pragma GCC diagnostic ignored "-Wsign-compare"
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38 #endif
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39
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40 // Define away the deprecated register storage class specifier to avoid
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41 // potential warnings about it.
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42 #if ! defined (register)
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43 # define register
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44 #endif
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45
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46 }
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47
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48 %option prefix = "octave_tex_"
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49 %option noyywrap
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50 %option reentrant
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51 %option bison-bridge
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52
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53 %option noyyalloc
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54 %option noyyrealloc
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55 %option noyyfree
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56
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57 %x NUM_MODE
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58 %x MAYBE_NUM_MODE
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59
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60 %{
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61
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62 #include "unistd-wrappers.h"
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63
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64 #include "txt-eng.h"
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65 #include "oct-tex-parser.h"
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66
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67 // FIXME: with bison 3.x, OCTAVE_TEX_STYPE appears in the generated
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68 // oct-parse.h file, but there is no definition for YYSTYPE, which is
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69 // needed by the code that is generated by flex. I can't seem to find
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70 // a way to tell flex to use OCTAVE_TEX_STYPE instead of YYSTYPE in
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71 // the code it generates, or to tell bison to provide the definition
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72 // of YYSTYPE in the generated oct-parse.h file.
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73
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74 #if defined (OCTAVE_TEX_STYPE_IS_DECLARED) && ! defined YYSTYPE
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75 # define YYSTYPE OCTAVE_TEX_STYPE
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76 #endif
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77
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78 #define YY_NO_UNISTD_H 1
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79 #define isatty octave_isatty_wrapper
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80
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81 %}
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82
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83 D [0-9]
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84 NUM (({D}+\.?{D}*)|(\.{D}+))
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85
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86 %%
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87
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88 %{
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89 // Numeric values.
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90 %}
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91
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92 <NUM_MODE>{NUM} {
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93 int nread = sscanf (yytext, "%lf", &(yylval->num));
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94
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95 if (nread == 1)
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96 return NUM;
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97 }
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98
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99 <NUM_MODE>[, \t]+ { }
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100
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101 <NUM_MODE>"\n"|. {
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102 yyless (0);
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103 BEGIN (INITIAL);
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104 }
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105
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106 <MAYBE_NUM_MODE>"{" {
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107 BEGIN (NUM_MODE);
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108 return START;
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109 }
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110
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111 <MAYBE_NUM_MODE>"\n"|. {
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112 yyless (0);
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113 BEGIN (INITIAL);
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114 }
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115
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116 %{
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117 // Simple commands.
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118 %}
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119
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120 "\\bf" { return BF; }
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121 "\\it" { return IT; }
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122 "\\sl" { return SL; }
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123 "\\rm" { return RM; }
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124
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125 %{
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126 // Generic font commands.
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127 %}
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128
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129 "\\fontname" { return FONTNAME; }
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130
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131 "\\fontsize" {
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132 BEGIN (MAYBE_NUM_MODE);
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133 return FONTSIZE;
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134 }
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135
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136 "\\color[rgb]" {
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137 BEGIN (MAYBE_NUM_MODE);
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138 return COLOR_RGB;
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139 }
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140
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141 "\\color" { return COLOR; }
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142
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143 %{
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144 // Special characters.
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145 %}
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146
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147 "{" { return START; }
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148 "}" { return END; }
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149 "^" { return SUPER; }
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150 "_" { return SUB; }
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151
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152 "\\{" |
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153 "\\}" |
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154 "\\^" |
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155 "\\_" |
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156 "\\\\" {
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157 yylval->ch = yytext[1];
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158 return CH;
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159 }
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160
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161 %{
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162 // Symbols.
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163 %}
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164
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165 @SYMBOL_RULES@
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166
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167 %{
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168 // Generic character.
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169 %}
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170
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171 "\n" |
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172 . {
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173 yylval->ch = yytext[0];
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174 return CH;
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175 }
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176
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177 %{
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178 #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
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179 // Also disable this warning for functions that is generated by flex
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180 // after the pattern rules.
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181 #pragma GCC diagnostic ignored "-Wunused-parameter"
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182 #endif
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183 %}
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184
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185 %%
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186
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187 #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
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188 // Restore prevailing warning state for remainder of the file.
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189 #pragma GCC diagnostic pop
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190 #endif
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191
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192 void *
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193 octave_tex_alloc (yy_size_t size, yyscan_t)
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194 {
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195 return malloc (size);
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196 }
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197
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198 void *
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199 octave_tex_realloc (void *ptr, yy_size_t size, yyscan_t)
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200 {
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201 return realloc (ptr, size);
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202 }
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203
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204 void
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205 octave_tex_free (void *ptr, yyscan_t)
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206 {
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207 free (ptr);
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208 }
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209
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210 bool
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211 text_parser_tex::init_lexer (const std::string& s)
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212 {
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213 if (! scanner)
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214 octave_tex_lex_init (&scanner);
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215
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216 if (scanner)
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217 {
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218 if (buffer_state)
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219 {
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220 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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221 scanner);
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222 buffer_state = 0;
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223 }
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224
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225 buffer_state = octave_tex__scan_bytes (s.data (), s.length (), scanner);
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226 }
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227
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228 return (scanner && buffer_state);
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229 }
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230
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231 void
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232 text_parser_tex::destroy_lexer (void)
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233 {
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234 if (buffer_state)
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235 {
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236 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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237 scanner);
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238 buffer_state = 0;
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239 }
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240
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241 if (scanner)
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242 {
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243 octave_tex_lex_destroy (scanner);
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244 scanner = 0;
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245 }
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246 }