Mercurial > octave
annotate libinterp/corefcn/oct-tex-lexer.in.ll @ 20541:e3c0fee87493
style fixes for tex lexer and parser
* oct-tex-lexer.in.ll, oct-tex-parser.in.yy:
Eliminate tabs and reindent.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 02 Oct 2015 12:25:39 -0400 |
parents | a3577622952c |
children | ec532a439c6f |
rev | line source |
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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 %option prefix = "octave_tex_" |
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24 %option noyywrap |
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25 %option reentrant |
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26 %option bison-bridge |
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27 |
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28 %option noyyalloc |
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29 %option noyyrealloc |
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30 %option noyyfree |
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31 |
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32 %top { |
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33 #ifdef HAVE_CONFIG_H |
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34 #include <config.h> |
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35 #endif |
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36 |
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37 } |
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38 |
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39 %x NUM_MODE |
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40 %x MAYBE_NUM_MODE |
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41 |
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42 %{ |
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43 |
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44 // The generated code may include unistd.h. We need that to happen |
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45 // before defining isatty to be prefixed with the gnulib namespace |
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46 // identifier. |
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47 |
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48 #include <sys/types.h> |
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49 #include <unistd.h> |
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50 |
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51 #include "txt-eng.h" |
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52 #include "oct-tex-parser.h" |
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53 |
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54 // FIXME: with bison 3.x, OCTAVE_TEX_STYPE appears in the generated |
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55 // oct-parse.h file, but there is no definition for YYSTYPE, which is |
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56 // needed by the code that is generated by flex. I can't seem to find |
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57 // a way to tell flex to use OCTAVE_TEX_STYPE instead of YYSTYPE in |
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58 // the code it generates, or to tell bison to provide the definition |
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59 // of YYSTYPE in the generated oct-parse.h file. |
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60 |
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61 #if defined (OCTAVE_TEX_STYPE_IS_DECLARED) && ! defined YYSTYPE |
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62 #define YYSTYPE OCTAVE_TEX_STYPE |
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63 #endif |
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64 |
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65 #if defined (GNULIB_NAMESPACE) |
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66 // Calls to the following functions appear in the generated output |
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67 // from flex without the namespace tag. Redefine them so we will use |
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68 // them via the gnulib namespace. |
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69 #define fprintf GNULIB_NAMESPACE::fprintf |
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70 #define fread GNULIB_NAMESPACE::fread |
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71 #define fwrite GNULIB_NAMESPACE::fwrite |
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72 #define getc GNULIB_NAMESPACE::getc |
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73 #define isatty GNULIB_NAMESPACE::isatty |
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74 #define malloc GNULIB_NAMESPACE::malloc |
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75 #define realloc GNULIB_NAMESPACE::realloc |
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76 #endif |
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77 |
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78 %} |
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79 |
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80 D [0-9] |
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81 NUM (({D}+\.?{D}*)|(\.{D}+)) |
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82 |
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83 %% |
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84 |
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85 %{ |
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86 // Numeric values. |
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87 %} |
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88 |
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89 <NUM_MODE>{NUM} { |
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90 int nread = sscanf (yytext, "%lf", &(yylval->num)); |
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91 |
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92 if (nread == 1) |
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93 return NUM; |
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94 } |
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95 |
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96 <NUM_MODE>[ \t]+ { } |
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97 |
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98 <NUM_MODE>"\n"|. { |
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99 yyless (0); |
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100 BEGIN (INITIAL); |
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101 } |
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102 |
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103 <MAYBE_NUM_MODE>"{" { |
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104 BEGIN (NUM_MODE); |
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105 return START; |
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106 } |
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107 |
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108 <MAYBE_NUM_MODE>"\n"|. { |
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109 yyless (0); |
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110 BEGIN (INITIAL); |
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111 } |
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112 |
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113 %{ |
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114 // Simple commands. |
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115 %} |
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116 |
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117 "\\bf" { return BF; } |
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118 "\\it" { return IT; } |
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119 "\\sl" { return SL; } |
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120 "\\rm" { return RM; } |
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121 |
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122 %{ |
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123 // Generic font commands. |
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124 %} |
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125 |
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126 "\\fontname" { return FONTNAME; } |
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127 |
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128 "\\fontsize" { |
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129 BEGIN (MAYBE_NUM_MODE); |
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130 return FONTSIZE; |
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131 } |
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132 |
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133 "\\color[rgb]" { |
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134 BEGIN (MAYBE_NUM_MODE); |
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135 return COLOR_RGB; |
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136 } |
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137 |
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138 "\\color" { return COLOR; } |
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139 |
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140 %{ |
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141 // Special characters. |
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142 %} |
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143 |
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144 "{" { return START; } |
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145 "}" { return END; } |
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146 "^" { return SUPER; } |
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147 "_" { return SUB; } |
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148 |
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149 "\\{" | |
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150 "\\}" | |
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151 "\\^" | |
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152 "\\_" | |
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153 "\\\\" { |
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154 yylval->ch = yytext[1]; |
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155 return CH; |
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156 } |
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157 |
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158 %{ |
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159 // Symbols. |
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160 %} |
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161 |
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162 @SYMBOL_RULES@ |
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163 |
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164 %{ |
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165 // Generic character. |
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166 %} |
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167 |
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168 "\n" | |
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169 . { |
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170 yylval->ch = yytext[0]; |
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171 return CH; |
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172 } |
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173 |
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174 %% |
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175 |
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176 void * |
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177 octave_tex_alloc (yy_size_t size, yyscan_t) |
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178 { |
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179 return malloc (size); |
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180 } |
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181 |
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182 void * |
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183 octave_tex_realloc (void *ptr, yy_size_t size, yyscan_t) |
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184 { |
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185 return realloc (ptr, size); |
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186 } |
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187 |
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188 void |
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189 octave_tex_free (void *ptr, yyscan_t) |
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190 { |
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191 free (ptr); |
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192 } |
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193 |
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194 bool |
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195 text_parser_tex::init_lexer (const std::string& s) |
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196 { |
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197 if (! scanner) |
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198 octave_tex_lex_init (&scanner); |
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199 |
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200 if (scanner) |
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201 { |
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202 if (buffer_state) |
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203 { |
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204 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state), |
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205 scanner); |
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206 buffer_state = 0; |
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207 } |
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208 |
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209 buffer_state = octave_tex__scan_bytes (s.data (), s.length (), scanner); |
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210 } |
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211 |
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212 return (scanner && buffer_state); |
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213 } |
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214 |
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215 void |
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216 text_parser_tex::destroy_lexer (void) |
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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 if (scanner) |
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226 { |
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227 octave_tex_lex_destroy (scanner); |
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228 scanner = 0; |
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229 } |
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230 } |