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annotate libinterp/corefcn/oct-tex-lexer.in.ll @ 21772:72bf7fbc8210

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Allow comma in \color[rgb] specification for text objects (bug #48003). * oct-tex-lexer.in.ll: Add ',' to list of ignored characters in NUM_MODE.
author Rik <rik@octave.org>
date Tue, 24 May 2016 12:14:38 -0700
parents aba2e6293dd8
children 4d723ba06b4a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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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 this warning 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 #endif
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38
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39 // Define away the deprecated register storage class specifier to avoid
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40 // potential warnings about it.
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41 #if ! defined (register)
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42 # define register
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43 #endif
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44
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45 }
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46
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47 %option prefix = "octave_tex_"
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48 %option noyywrap
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49 %option reentrant
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50 %option bison-bridge
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51
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52 %option noyyalloc
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53 %option noyyrealloc
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54 %option noyyfree
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55
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56 %x NUM_MODE
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57 %x MAYBE_NUM_MODE
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58
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59 %{
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60
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61 // The generated code may include unistd.h. We need that to happen
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62 // before defining isatty to be prefixed with the gnulib namespace
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63 // identifier.
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64
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65 #include <sys/types.h>
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66 #include <unistd.h>
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67
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68 #include "txt-eng.h"
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69 #include "oct-tex-parser.h"
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70
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71 // FIXME: with bison 3.x, OCTAVE_TEX_STYPE appears in the generated
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72 // oct-parse.h file, but there is no definition for YYSTYPE, which is
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73 // needed by the code that is generated by flex. I can't seem to find
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74 // a way to tell flex to use OCTAVE_TEX_STYPE instead of YYSTYPE in
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75 // the code it generates, or to tell bison to provide the definition
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76 // of YYSTYPE in the generated oct-parse.h file.
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77
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78 #if defined (OCTAVE_TEX_STYPE_IS_DECLARED) && ! defined YYSTYPE
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79 # define YYSTYPE OCTAVE_TEX_STYPE
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80 #endif
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81
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82 #if defined (GNULIB_NAMESPACE)
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83 // Calls to the following functions appear in the generated output
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84 // from flex without the namespace tag. Redefine them so we will use
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85 // them via the gnulib namespace.
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86 # define fprintf GNULIB_NAMESPACE::fprintf
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87 # define fread GNULIB_NAMESPACE::fread
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88 # define fwrite GNULIB_NAMESPACE::fwrite
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89 # define getc GNULIB_NAMESPACE::getc
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90 # define isatty GNULIB_NAMESPACE::isatty
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91 # define malloc GNULIB_NAMESPACE::malloc
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92 # define realloc GNULIB_NAMESPACE::realloc
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93 #endif
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94
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95 %}
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96
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97 D [0-9]
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98 NUM (({D}+\.?{D}*)|(\.{D}+))
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99
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100 %%
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101
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102 %{
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103 // Numeric values.
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104 %}
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105
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106 <NUM_MODE>{NUM} {
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107 int nread = sscanf (yytext, "%lf", &(yylval->num));
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108
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109 if (nread == 1)
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110 return NUM;
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111 }
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112
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113 <NUM_MODE>[, \t]+ { }
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114
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115 <NUM_MODE>"\n"|. {
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116 yyless (0);
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117 BEGIN (INITIAL);
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118 }
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119
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120 <MAYBE_NUM_MODE>"{" {
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121 BEGIN (NUM_MODE);
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122 return START;
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123 }
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124
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125 <MAYBE_NUM_MODE>"\n"|. {
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126 yyless (0);
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127 BEGIN (INITIAL);
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128 }
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129
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130 %{
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131 // Simple commands.
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132 %}
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133
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134 "\\bf" { return BF; }
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135 "\\it" { return IT; }
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136 "\\sl" { return SL; }
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137 "\\rm" { return RM; }
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138
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139 %{
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140 // Generic font commands.
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141 %}
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142
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143 "\\fontname" { return FONTNAME; }
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144
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145 "\\fontsize" {
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146 BEGIN (MAYBE_NUM_MODE);
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147 return FONTSIZE;
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148 }
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149
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150 "\\color[rgb]" {
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151 BEGIN (MAYBE_NUM_MODE);
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152 return COLOR_RGB;
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153 }
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154
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155 "\\color" { return COLOR; }
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156
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157 %{
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158 // Special characters.
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159 %}
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160
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161 "{" { return START; }
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162 "}" { return END; }
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163 "^" { return SUPER; }
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164 "_" { return SUB; }
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165
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166 "\\{" |
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167 "\\}" |
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168 "\\^" |
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169 "\\_" |
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170 "\\\\" {
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171 yylval->ch = yytext[1];
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172 return CH;
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173 }
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174
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175 %{
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176 // Symbols.
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177 %}
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178
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179 @SYMBOL_RULES@
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180
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181 %{
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182 // Generic character.
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183 %}
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184
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185 "\n" |
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186 . {
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187 yylval->ch = yytext[0];
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188 return CH;
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189 }
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190
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191 %{
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192 #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
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193 // Also disable this warning for functions that is generated by flex
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194 // after the pattern rules.
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195 #pragma GCC diagnostic ignored "-Wunused-parameter"
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196 #endif
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197 %}
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198
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199 %%
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200
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201 #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC)
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202 // Restore prevailing warning state for remainder of the file.
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203 #pragma GCC diagnostic pop
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204 #endif
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205
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206 void *
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207 octave_tex_alloc (yy_size_t size, yyscan_t)
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208 {
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209 return malloc (size);
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210 }
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211
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212 void *
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213 octave_tex_realloc (void *ptr, yy_size_t size, yyscan_t)
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214 {
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215 return realloc (ptr, size);
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216 }
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217
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218 void
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219 octave_tex_free (void *ptr, yyscan_t)
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220 {
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221 free (ptr);
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222 }
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223
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224 bool
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225 text_parser_tex::init_lexer (const std::string& s)
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226 {
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227 if (! scanner)
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228 octave_tex_lex_init (&scanner);
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229
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230 if (scanner)
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231 {
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232 if (buffer_state)
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233 {
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234 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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235 scanner);
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236 buffer_state = 0;
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237 }
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238
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239 buffer_state = octave_tex__scan_bytes (s.data (), s.length (), scanner);
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240 }
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241
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242 return (scanner && buffer_state);
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243 }
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244
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245 void
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246 text_parser_tex::destroy_lexer (void)
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247 {
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248 if (buffer_state)
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249 {
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250 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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251 scanner);
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252 buffer_state = 0;
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253 }
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254
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255 if (scanner)
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256 {
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257 octave_tex_lex_destroy (scanner);
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258 scanner = 0;
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259 }
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260 }