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2 | toby | 1 | %{ |
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3 | /* |
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4 | This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop |
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5 | Copyright (C) 2003-5 Toby Thain, toby@telegraphics.com.au |
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6 | |||
7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 2 of the License, or |
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10 | (at your option) any later version. |
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11 | |||
12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |||
17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; if not, write to the Free Software |
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19 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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20 | */ |
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21 | |||
41 | toby | 22 | #include <ctype.h> |
2 | toby | 23 | |
24 | #include "node.h" |
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25 | #include "dbg.h" |
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26 | #include "y.tab.h" |
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27 | |||
28 | #define yywrap() 1 |
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29 | |||
30 | /* the reason for these hacks is to prevent any references to stdlib, |
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31 | which cause load failures in OS X due to mismatch of headers/libraries |
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32 | when project is built with MPW */ |
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33 | |||
34 | #if defined(__MRC__) && TARGET_CARBON |
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62 | toby | 35 | #define stdin 0 |
36 | #define stdout 0 |
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37 | #define stderr 0 |
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2 | toby | 38 | #endif |
39 | |||
40 | #define YY_FATAL_ERROR(msg) |
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41 | #define YY_INPUT |
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42 | #define YYDECL int yylex(void) |
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43 | #define ECHO |
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44 | #define YY_NEVER_INTERACTIVE 1 |
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45 | |||
46 | YYDECL; |
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47 | |||
48 | int tokpos,tokstart; |
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49 | |||
50 | extern YYSTYPE yylval; |
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51 | extern int inarglist[],arglistptr,varused[]; |
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52 | |||
53 | #define OP(x) \ |
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54 | yylval = newnode(x); \ |
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55 | return x; |
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56 | |||
57 | #define YY_USER_ACTION \ |
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58 | tokstart = tokpos; \ |
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59 | tokpos += yyleng; |
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60 | |||
61 | %} |
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62 | |||
63 | DIGIT [0-9] |
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64 | HEXDIGIT [0-9A-Fa-f] |
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65 | |||
66 | %% |
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67 | |||
68 | [ \t\n\r]+|"//"[^\n\r]* ; /* ignore whitespace, comments */ |
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69 | |||
70 | 0[xX]{HEXDIGIT}+ { /* hex constant; make new tree node */ |
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71 | int i,c; |
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72 | value_type v; |
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73 | char *p; |
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74 | |||
75 | for( i=yyleng-2,p=yytext+2,v = 0 ; i-- ; ){ |
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76 | c = toupper(*p++); |
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77 | v *= 16; |
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78 | v += c - (c>='A' ? 'A'-10 : '0'); |
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79 | } |
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80 | yylval = newnode(TOK_NUM); |
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81 | yylval->v.value = v; |
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82 | return TOK_NUM; |
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83 | } |
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84 | |||
85 | {DIGIT}+ { /* decimal constant; make new tree node */ |
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86 | /* {DIGIT}*(\.{DIGIT}+)?([eE][\+\-]?{DIGIT}+)? */ |
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87 | yylval = newnode(TOK_NUM); |
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88 | #ifdef FP_VALUE |
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89 | yylval->v.value = atof(yytext); |
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90 | #else |
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91 | yylval->v.value = atoi(yytext); |
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92 | #endif |
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93 | return TOK_NUM; |
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94 | } |
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95 | |||
96 | "<<" { OP(SHLEFT); } |
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97 | ">>" { OP(SHRIGHT); } |
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98 | "<=" { OP(LE); } |
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99 | ">=" { OP(GE); } |
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100 | "==" { OP(EQ); } |
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101 | "!=" { OP(NE); } |
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102 | "&&" { OP(LOGAND); } |
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103 | "||" { OP(LOGOR); } |
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104 | /* "**" { OP(EXP); } */ |
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105 | |||
106 | |||
107 | [!~+\-*/%<>&^|?] { OP(yytext[0]); } /* an operator; make new tree node */ |
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108 | |||
109 | , { /* comma is special; sometimes it's an operator, and sometimes a function argument separator */ |
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110 | if(inarglist[arglistptr]) |
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111 | return TOK_ARGSEP; |
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112 | else{ |
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113 | OP(yytext[0]); |
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114 | } |
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115 | } |
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116 | |||
117 | [():] return yytext[0]; /* these tokens are just sugar; never tree nodes */ |
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118 | |||
119 | [a-zA-Z][a-zA-Z0-9]+ { /* an identifier (more than one character); look it up */ |
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120 | struct sym_rec *s = lookup(yytext); |
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121 | if(s){ /* a known function or variable; make a tree node for it */ |
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122 | yylval = newnode(s->token); |
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123 | yylval->v.sym = s; |
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124 | return s->token; |
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125 | }else |
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126 | return TOK_UNKNOWN; |
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127 | } |
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128 | |||
50 | toby | 129 | [RGBACIUV] { /* undocumented(?) variables indicating channel range */ |
130 | yylval = newnode(TOK_NUM); |
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131 | yylval->v.value = 255; |
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132 | return TOK_NUM; |
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133 | } |
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134 | |||
2 | toby | 135 | [rgbaciuvxyzdmXYZDM] { /* single character variable */ |
136 | yylval = newnode(TOK_SPECIALVAR); |
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137 | yylval->v.specialvar = yytext[0]; |
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138 | return TOK_SPECIALVAR; |
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139 | } |
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140 | |||
141 | . return TOK_BADCHAR; |
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142 | |||
143 | %% |