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| Rev | Author | Line No. | Line |
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| 358 | daniel-mar | 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) 2003-2009 Toby Thain, toby@telegraphics.com.au |
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| 6 | Copyright (C) 2018-2019 Daniel Marschall, ViaThinkSoft |
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| 7 | |||
| 8 | This program is free software; you can redistribute it and/or modify |
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| 9 | it under the terms of the GNU General Public License as published by |
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| 10 | the Free Software Foundation; either version 2 of the License, or |
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| 11 | (at your option) any later version. |
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| 12 | |||
| 13 | This program is distributed in the hope that it will be useful, |
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | GNU General Public License for more details. |
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| 17 | |||
| 18 | You should have received a copy of the GNU General Public License |
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| 19 | along with this program; if not, write to the Free Software |
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| 20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include <ctype.h> |
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| 24 | |||
| 25 | #include "node.h" |
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| 26 | #include "dbg.h" |
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| 27 | #include "y.tab.h" |
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| 28 | |||
| 29 | #define yywrap() 1 |
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| 30 | |||
| 31 | /* the reason for these hacks is to prevent any references to stdlib, |
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| 32 | which cause load failures in OS X due to mismatch of headers/libraries |
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| 33 | when project is built with MPW */ |
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| 34 | |||
| 35 | #if defined(__MRC__) && TARGET_CARBON |
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| 36 | #define stdin 0 |
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| 37 | #define stdout 0 |
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| 38 | #define stderr 0 |
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| 39 | #endif |
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| 40 | |||
| 41 | #define YY_FATAL_ERROR(msg) |
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| 42 | #define YY_INPUT |
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| 43 | #define YYDECL int yylex(void) |
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| 44 | #define ECHO |
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| 45 | #define YY_NEVER_INTERACTIVE 1 |
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| 46 | |||
| 47 | YYDECL; |
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| 48 | |||
| 49 | int tokpos,tokstart; |
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| 50 | |||
| 51 | extern YYSTYPE yylval; |
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| 52 | extern int inarglist[],arglistptr,varused[]; |
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| 53 | |||
| 54 | #define OP(x) \ |
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| 55 | yylval = newnode(x); \ |
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| 56 | return x; |
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| 57 | |||
| 58 | #define YY_USER_ACTION \ |
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| 59 | tokstart = tokpos; \ |
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| 60 | tokpos += yyleng; |
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| 61 | |||
| 62 | %} |
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| 63 | |||
| 64 | DIGIT [0-9] |
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| 65 | HEXDIGIT [0-9A-Fa-f] |
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| 66 | |||
| 67 | %% |
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| 68 | |||
| 69 | [ \t\n\r]+|"//"[^\n\r]* ; /* ignore whitespace, comments */ |
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| 70 | |||
| 71 | 0[xX]{HEXDIGIT}+ { /* hex constant; make new tree node */ |
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| 72 | int i,c; |
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| 73 | value_type v; |
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| 74 | char *p; |
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| 75 | |||
| 76 | for( i=yyleng-2,p=yytext+2,v = 0 ; i-- ; ){ |
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| 77 | c = toupper(*p++); |
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| 78 | v *= 16; |
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| 79 | v += c - (c>='A' ? 'A'-10 : '0'); |
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| 80 | } |
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| 81 | yylval = newnode(TOK_NUM); |
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| 82 | yylval->v.value = v; |
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| 83 | return TOK_NUM; |
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| 84 | } |
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| 85 | |||
| 86 | {DIGIT}+ { /* decimal constant; make new tree node */ |
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| 87 | /* {DIGIT}*(\.{DIGIT}+)?([eE][\+\-]?{DIGIT}+)? */ |
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| 88 | yylval = newnode(TOK_NUM); |
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| 89 | #ifdef FP_VALUE |
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| 90 | yylval->v.value = atof(yytext); |
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| 91 | #else |
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| 92 | yylval->v.value = atoi(yytext); |
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| 93 | #endif |
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| 94 | return TOK_NUM; |
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| 95 | } |
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| 96 | |||
| 97 | "<<" { OP(SHLEFT); } |
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| 98 | ">>" { OP(SHRIGHT); } |
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| 99 | "<=" { OP(LE); } |
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| 100 | ">=" { OP(GE); } |
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| 101 | "==" { OP(EQ); } |
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| 102 | "!=" { OP(NE); } |
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| 103 | "&&" { OP(LOGAND); } |
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| 104 | "||" { OP(LOGOR); } |
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| 105 | /* "**" { OP(EXP); } */ |
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| 106 | |||
| 107 | |||
| 108 | [!~+\-*/%<>&^|?] { OP(yytext[0]); } /* an operator; make new tree node */ |
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| 109 | |||
| 110 | , { /* comma is special; sometimes it's an operator, and sometimes a function argument separator */ |
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| 111 | if(inarglist[arglistptr]) |
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| 112 | return TOK_ARGSEP; |
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| 113 | else{ |
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| 114 | OP(yytext[0]); |
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| 115 | } |
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| 116 | } |
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| 117 | |||
| 118 | [():] return yytext[0]; /* these tokens are just sugar; never tree nodes */ |
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| 119 | |||
| 120 | [a-zA-Z][a-zA-Z0-9]+ { /* an identifier (more than one character); look it up */ |
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| 121 | struct sym_rec *s = lookup(yytext); |
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| 122 | if(s){ /* a known function or variable; make a tree node for it */ |
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| 123 | yylval = newnode(s->token); |
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| 124 | yylval->v.sym = s; |
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| 125 | return s->token; |
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| 126 | }else |
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| 127 | return TOK_UNKNOWN; |
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| 128 | } |
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| 129 | |||
| 130 | [t] { |
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| 131 | yylval = newnode(TOK_NUM); |
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| 132 | yylval->v.value = 0; |
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| 133 | return TOK_NUM; |
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| 134 | } |
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| 135 | |||
| 136 | [rgbaciuvxyzpdmXYZDMRGBACIUV] { /* single character variable */ |
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| 137 | yylval = newnode(TOK_SPECIALVAR); |
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| 138 | yylval->v.specialvar = yytext[0]; |
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| 139 | /* values are defined in process.c */ |
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| 140 | return TOK_SPECIALVAR; |
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| 141 | } |
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| 142 | |||
| 143 | . return TOK_BADCHAR; |
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| 144 | |||
| 145 | %% |