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| Rev | Author | Line No. | Line |
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| 2 | toby | 1 | %{ |
| 2 | |||
| 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 | |||
| 117 | dmarschall | 135 | [t] { |
| 136 | yylval = newnode(TOK_NUM); |
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| 137 | yylval->v.value = 0; |
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| 138 | return TOK_NUM; |
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| 139 | } |
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| 140 | |||
| 141 | [rgbaciuvxyzpdmXYZDM] { /* single character variable */ |
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| 2 | toby | 142 | yylval = newnode(TOK_SPECIALVAR); |
| 143 | yylval->v.specialvar = yytext[0]; |
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| 117 | dmarschall | 144 | /* values are defined in process.c */ |
| 2 | toby | 145 | return TOK_SPECIALVAR; |
| 146 | } |
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| 147 | |||
| 148 | . return TOK_BADCHAR; |
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| 149 | |||
| 150 | %% |