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annotate libinterp/corefcn/oct-tex-lexer.in.ll @ 19775:a941a65c7cb8

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handle bison syntax changes in TeX parser * oct-tex-parser.in.yy: Rename from oct-tex-parser.yy. Substitute %API_PREFIX_DECL%. * build-aux/common.mk (subst-bison-api-decls): New macro. * libinterp/parse-tree/module.mk (oct-parse.yy): Use it. * libinterp/corefcn/module.mk (oct-tex-parser.yy): New rule. * libinterp/Makefile.am: Ensure that oct-tex-parser.yy is built early. Search for tests in generated .yy file, not .in.yy file. * oct-tex-lexer.in.ll: Define YYSTPE if needed.
author John W. Eaton <jwe@octave.org>
date Thu, 19 Feb 2015 18:05:07 -0500
parents 4197fc428c7d
children a3577622952c
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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 %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 %top {
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29 #ifdef HAVE_CONFIG_H
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30 #include <config.h>
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31 #endif
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32
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33 }
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34
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35 %x NUM_MODE
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36 %x MAYBE_NUM_MODE
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37
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38 %{
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39
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40 // The generated code may include unistd.h. We need that to happen
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41 // before defining isatty to be prefixed with the gnulib namespace
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42 // identifier.
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43
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44 #include <sys/types.h>
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45 #include <unistd.h>
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46
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47 #include "txt-eng.h"
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48 #include "oct-tex-parser.h"
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49
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50 // FIXME: with bison 3.x, OCTAVE_TEX_STYPE appears in the generated
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51 // oct-parse.h file, but there is no definition for YYSTYPE, which is
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52 // needed by the code that is generated by flex. I can't seem to find a
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53 // way to tell flex to use OCTAVE_TEX_STYPE instead of YYSTYPE in the code
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54 // it generates, or to tell bison to provide the definition of YYSTYPE
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55 // in the generated oct-parse.h file.
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56
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57 #if defined (OCTAVE_TEX_STYPE_IS_DECLARED) && ! defined YYSTYPE
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58 #define YYSTYPE OCTAVE_TEX_STYPE
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59 #endif
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60
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61 #if defined (GNULIB_NAMESPACE)
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62 // Calls to the following functions appear in the generated output from
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63 // flex without the namespace tag. Redefine them so we will use them
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64 // via the gnulib namespace.
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65 #define fprintf GNULIB_NAMESPACE::fprintf
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66 #define fread GNULIB_NAMESPACE::fread
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67 #define fwrite GNULIB_NAMESPACE::fwrite
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68 #define getc GNULIB_NAMESPACE::getc
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69 #define isatty GNULIB_NAMESPACE::isatty
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70 #define malloc GNULIB_NAMESPACE::malloc
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71 #define realloc GNULIB_NAMESPACE::realloc
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72 #endif
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73
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74 %}
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75
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76 D [0-9]
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77 NUM (({D}+\.?{D}*)|(\.{D}+))
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78
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79 %%
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80
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81 %{
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82 // Numeric values
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83 %}
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84
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85 <NUM_MODE>{NUM} {
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86 int nread;
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87
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88 nread = sscanf (yytext, "%lf", &(yylval->num));
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89 if (nread == 1)
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90 return NUM;
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91 }
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92 <NUM_MODE>[ \t]+ { }
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93 <NUM_MODE>"\n"|. { yyless (0); BEGIN (INITIAL); }
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94
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95 <MAYBE_NUM_MODE>"{" { BEGIN (NUM_MODE); return START; }
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96 <MAYBE_NUM_MODE>"\n"|. { yyless (0); BEGIN (INITIAL); }
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97
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98 %{
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99 // Simple commands
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100 %}
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101
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102 "\\bf" { return BF; }
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103 "\\it" { return IT; }
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104 "\\sl" { return SL; }
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105 "\\rm" { return RM; }
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106
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107 %{
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108 // Generic font commands
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109 %}
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110
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111 "\\fontname" { return FONTNAME; }
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112 "\\fontsize" { BEGIN (MAYBE_NUM_MODE); return FONTSIZE; }
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113 "\\color[rgb]" { BEGIN (MAYBE_NUM_MODE); return COLOR_RGB; }
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114 "\\color" { return COLOR; }
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115
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116 %{
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117 // Special characters
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118 %}
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119
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120 "{" { return START; }
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121 "}" { return END; }
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122 "^" { return SUPER; }
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123 "_" { return SUB; }
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124
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125 "\\{" |
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126 "\\}" |
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127 "\\^" |
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128 "\\_" |
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129 "\\\\" { yylval->ch = yytext[1]; return CH; }
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130
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131 %{
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132 // Symbols
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133 %}
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134
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fe6518a1d87c Move TeX symbol decoding into the lexer (bug #39831).
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135 @SYMBOL_RULES@
17269
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136
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137 %{
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138 // Generic character
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139 %}
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140
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cb7233cfbf43 Prepare base text rendering code for full TeX support.
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141 "\n" |
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142 . { yylval->ch = yytext[0]; return CH; }
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143
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144 %%
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145
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146 bool
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147 text_parser_tex::init_lexer (const std::string& s)
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148 {
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149 if (! scanner)
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150 octave_tex_lex_init (&scanner);
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151
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152 if (scanner)
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153 {
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154 if (buffer_state)
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155 {
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156 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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157 scanner);
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158 buffer_state = 0;
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159 }
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160
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161 buffer_state = octave_tex__scan_bytes (s.data (), s.length (), scanner);
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162 }
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163
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164 return (scanner && buffer_state);
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165 }
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166
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167 void
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168 text_parser_tex::destroy_lexer (void)
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169 {
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170 if (buffer_state)
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171 {
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172 octave_tex__delete_buffer (reinterpret_cast<YY_BUFFER_STATE> (buffer_state),
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173 scanner);
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174 buffer_state = 0;
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175 }
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176
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177 if (scanner)
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178 {
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179 octave_tex_lex_destroy (scanner);
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180 scanner = 0;
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181 }
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182 }