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/* |
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* Copyright (c) 2014-2017 Christian Schoenebeck and Andreas Persson |
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schoenebeck |
2581 |
* |
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* http://www.linuxsampler.org |
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* |
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* This file is part of LinuxSampler and released under the same terms. |
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* See README file for details. |
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*/ |
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schoenebeck |
2888 |
/* Token scanner for NKSP real-time instrument script language. */ |
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2581 |
|
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%{ |
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#include "parser_shared.h" |
15 |
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#include <math.h> |
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// reentrant scanner data context |
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#define YY_EXTRA_TYPE ParserContext* |
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// set line number each time a token is recognized |
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#define YY_USER_ACTION \ |
20 |
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{ \ |
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yylloc->first_line = yylineno; \ |
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yylloc->last_line = yylineno; \ |
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yylloc->first_column = yycolumn; \ |
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yycolumn += yyleng; \ |
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yylloc->last_column = yycolumn - 1; \ |
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/*printf("lex: line '%s'\n", yytext);*/ \ |
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} |
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// custom (f)lex input for reading from std::istream object |
29 |
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#define YY_INPUT(buf,result,max_size) \ |
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{ \ |
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char c = yyextra->is->get(); \ |
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if (yyextra->is->eof()) \ |
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result = YY_NULL; \ |
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else { \ |
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buf[0] = c; \ |
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result = 1; \ |
37 |
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} \ |
38 |
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} |
39 |
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40 |
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static void scanner_error(YYLTYPE* locp, LinuxSampler::ParserContext* context, const char* err) { |
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context->addErr(locp->first_line, locp->last_line, locp->first_column, locp->last_column, err); |
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} |
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static void scanner_warning(YYLTYPE* locp, LinuxSampler::ParserContext* context, const char* txt) { |
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context->addWrn(locp->first_line, locp->last_line, locp->first_column, locp->last_column, txt); |
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} |
47 |
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48 |
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#define SCANNER_ERR(txt) scanner_error(yylloc, yyextra, txt) |
49 |
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#define SCANNER_WRN(txt) scanner_warning(yylloc, yyextra, txt) |
50 |
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51 |
schoenebeck |
3054 |
// shut up warning that 'register' keyword is deprecated as of C++11 |
52 |
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#if defined(__cplusplus) && __cplusplus >= 201103L |
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# define register |
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#endif |
55 |
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using namespace LinuxSampler; |
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static int countNewLineChars(const char* txt) { |
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int n = 0; |
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for (int i = 0; txt[i]; ++i) |
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if (txt[i] == '\n') ++n; |
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return n; |
63 |
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} |
64 |
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static int countCharsPastLastNewLine(const char* txt) { |
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const int n = (int)strlen(txt); |
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for (int i = n - 1; i >= 0; --i) |
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if (txt[i] == '\n') |
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return n - i - 1; |
70 |
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return n; |
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} |
72 |
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73 |
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#define processLocation() { \ |
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const int nl = countNewLineChars(yytext); \ |
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yylineno += nl; \ |
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if (nl) yycolumn = countCharsPastLastNewLine(yytext); \ |
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} |
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// if compiled for debugging, throw an exception instead of exiting on fatal |
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// lexer errors (so the debugger may pause with the appropriate back trace) |
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#if DEBUG |
82 |
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# include <stdexcept> |
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# define YY_FATAL_ERROR(msg) throw std::runtime_error(msg) |
84 |
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#endif |
85 |
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%} |
87 |
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/* use Flex's built-in support for line numbers |
89 |
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(disabled, because it seems to be unreliable, so we are using our own |
90 |
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tracking code in the respective scanner rules below) */ |
91 |
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/*%option yylineno*/ |
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/* generate a reentrant safe scanner */ |
93 |
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%option reentrant |
94 |
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/* avoid symbol collision with other (i.e. future) scanner symbols */ |
95 |
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%option prefix="InstrScript_" |
96 |
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/* bison-bridge adds an argument yylval to yylex, and bison-locations adds an |
97 |
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argument code yylloc for location tracking. */ |
98 |
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%option bison-bridge |
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%option bison-locations |
100 |
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/* yywrap() would be called at EOF, we don't need it */ |
101 |
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%option noyywrap |
102 |
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/* enable functions yy_push_state(), yy_pop_state(), yy_top_state() */ |
103 |
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%option stack |
104 |
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105 |
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/* inclusive scanner conditions */ |
106 |
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%s PREPROC_BODY_USE |
107 |
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/* exclusive scanner conditions */ |
108 |
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%x PREPROC_SET_COND PREPROC_RESET_COND PREPROC_IF PREPROC_IF_NOT PREPROC_BODY_EAT PREPROC_PRE_BODY_USE PREPROC_PRE_BODY_EAT |
109 |
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110 |
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DIGIT [0-9] |
111 |
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ID [a-zA-Z][a-zA-Z0-9_]* |
112 |
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METRIC (k|h|(da)|d|c|m|u) |
113 |
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UNIT (s|(Hz)|B) |
114 |
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|
115 |
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%% |
116 |
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117 |
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\"[^"]*\" { |
118 |
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yylval->sValue = strdup(yytext + 1); |
119 |
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yylval->sValue[strlen(yylval->sValue) - 1] = '\0'; |
120 |
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return STRING; |
121 |
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} |
122 |
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123 |
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{DIGIT}+ { |
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if (sizeof(vmint) < 8) |
125 |
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yylval->iValue = atoi(yytext); |
126 |
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else |
127 |
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yylval->iValue = atoll(yytext); |
128 |
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return INTEGER; |
129 |
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} |
130 |
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{DIGIT}+({METRIC}{1,2}|({METRIC}{0,2}{UNIT}?)) { |
132 |
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int pos = 0; |
133 |
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134 |
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// parse number portion |
135 |
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vmint value = 0; |
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for (; yytext[pos] >= '0' && yytext[pos] <= '9'; ++pos) { |
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value *= 10; |
138 |
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value += yytext[pos] - '0'; |
139 |
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} |
140 |
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yylval->iUnitValue.iValue = value; |
141 |
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142 |
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// parse metric prefix portion |
143 |
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for (int i = 0; i < 2; ++i, ++pos) { |
144 |
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switch (yytext[pos]) { |
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case 'k': yylval->iUnitValue.prefix[i] = VM_KILO; continue; |
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case 'h': yylval->iUnitValue.prefix[i] = VM_HECTO; continue; |
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case 'c': yylval->iUnitValue.prefix[i] = VM_CENTI; continue; |
148 |
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case 'm': yylval->iUnitValue.prefix[i] = VM_MILLI; continue; |
149 |
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case 'u': yylval->iUnitValue.prefix[i] = VM_MICRO; continue; |
150 |
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case 'd': |
151 |
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if (yytext[pos+1] == 'a') { |
152 |
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yylval->iUnitValue.prefix[i] = VM_DECA; |
153 |
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++pos; |
154 |
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} else { |
155 |
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yylval->iUnitValue.prefix[i] = VM_DECI; |
156 |
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} |
157 |
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continue; |
158 |
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default: |
159 |
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yylval->iUnitValue.prefix[i] = VM_NO_PREFIX; |
160 |
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goto parseStdUnit; |
161 |
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} |
162 |
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} |
163 |
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164 |
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parseStdUnit: |
165 |
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166 |
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// parse standard measurement unit |
167 |
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switch (yytext[pos]) { |
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case 's': yylval->iUnitValue.unit = VM_SECOND; break; |
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case 'H': yylval->iUnitValue.unit = VM_HERTZ; break; |
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case 'B': yylval->iUnitValue.unit = VM_BEL; break; |
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default: yylval->iUnitValue.unit = VM_NO_UNIT; break; |
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} |
173 |
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174 |
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return INTEGER_UNIT; |
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} |
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/* there is currently no support for floating point numbers in NKSP yet */ |
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/*{DIGIT}+"."{DIGIT}* { |
179 |
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printf("A float: %s (%g)\n", yytext, atof(yytext)); |
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}*/ |
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182 |
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183 |
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/* Preprocessor statement: SET_CONDITION(name) */ |
184 |
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185 |
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<*>"SET_CONDITION"[ \t]*"(" { |
186 |
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//printf("SET_CONDITION\n"); |
187 |
schoenebeck |
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yy_push_state(PREPROC_SET_COND, yyscanner); |
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} |
189 |
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<PREPROC_SET_COND>{ID} { |
190 |
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//printf("preproc set condition '%s'\n", yytext); |
191 |
schoenebeck |
2581 |
bool success = yyextra->setPreprocessorCondition(yytext); |
192 |
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if (!success) { |
193 |
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SCANNER_WRN((String("Preprocessor: Condition '") + |
194 |
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yytext + "' is already set.").c_str()); |
195 |
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} |
196 |
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} |
197 |
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<PREPROC_SET_COND>[ \t]*")" { |
198 |
schoenebeck |
2588 |
//printf("End of PREPROC_SET_COND\n"); |
199 |
schoenebeck |
2581 |
yy_pop_state(yyscanner); |
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} |
201 |
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202 |
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203 |
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/* Preprocessor statement: RESET_CONDITION(name) */ |
204 |
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205 |
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<*>"RESET_CONDITION"[ \t]*"(" { |
206 |
schoenebeck |
2588 |
//printf("RESET_CONDITION\n"); |
207 |
schoenebeck |
2581 |
yy_push_state(PREPROC_RESET_COND, yyscanner); |
208 |
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} |
209 |
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<PREPROC_RESET_COND>{ID} { |
210 |
schoenebeck |
2588 |
//printf("preproc reset condition '%s'\n", yytext); |
211 |
schoenebeck |
2581 |
bool success = yyextra->resetPreprocessorCondition(yytext); |
212 |
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if (!success) { |
213 |
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SCANNER_ERR((String("Preprocessor: could not reset condition '") + |
214 |
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yytext + "' (either not set or a built-in condition).").c_str()); |
215 |
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} |
216 |
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} |
217 |
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<PREPROC_RESET_COND>[ \t]*")" { |
218 |
schoenebeck |
2588 |
//printf("End of RESET_CONDITION\n"); |
219 |
schoenebeck |
2581 |
yy_pop_state(yyscanner); |
220 |
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} |
221 |
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222 |
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223 |
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/* Preprocessor conditional statements: |
224 |
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225 |
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USE_CODE_IF(name) |
226 |
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... |
227 |
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END_USE_CODE |
228 |
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229 |
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and: |
230 |
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231 |
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USE_CODE_IF_NOT(name) |
232 |
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... |
233 |
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END_USE_CODE |
234 |
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*/ |
235 |
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236 |
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<*>"USE_CODE_IF"[ \t]*"(" { |
237 |
schoenebeck |
3308 |
//printf("{%s}\n", yytext); |
238 |
schoenebeck |
2581 |
yy_push_state(PREPROC_IF, yyscanner); |
239 |
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} |
240 |
schoenebeck |
3308 |
<PREPROC_BODY_EAT>"USE_CODE_IF"[ \t]*"("{ID}")" { |
241 |
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//printf("[EAT{%s}\n", yytext); |
242 |
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yy_push_state(PREPROC_BODY_EAT, yyscanner); |
243 |
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} |
244 |
schoenebeck |
2581 |
<*>"USE_CODE_IF_NOT"[ \t]*"(" { |
245 |
schoenebeck |
2588 |
//printf("USE_CODE_IF_NOT\n"); |
246 |
schoenebeck |
2581 |
yy_push_state(PREPROC_IF_NOT, yyscanner); |
247 |
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} |
248 |
schoenebeck |
3308 |
<PREPROC_BODY_EAT>"USE_CODE_IF_NOT"[ \t]*"("{ID}")" { |
249 |
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//printf("[EAT{%s}\n", yytext); |
250 |
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yy_push_state(PREPROC_BODY_EAT, yyscanner); |
251 |
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} |
252 |
schoenebeck |
2581 |
<PREPROC_IF>{ID} { |
253 |
schoenebeck |
2588 |
//printf("preproc use code if '%s'\n", yytext); |
254 |
schoenebeck |
2581 |
yy_pop_state(yyscanner); |
255 |
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if (yyextra->isPreprocessorConditionSet(yytext)) |
256 |
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yy_push_state(PREPROC_PRE_BODY_USE, yyscanner); |
257 |
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else |
258 |
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yy_push_state(PREPROC_PRE_BODY_EAT, yyscanner); |
259 |
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} |
260 |
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<PREPROC_IF_NOT>{ID} { |
261 |
schoenebeck |
2588 |
//printf("preproc use code if not '%s'\n", yytext); |
262 |
schoenebeck |
2581 |
yy_pop_state(yyscanner); |
263 |
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if (!yyextra->isPreprocessorConditionSet(yytext)) |
264 |
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yy_push_state(PREPROC_PRE_BODY_USE, yyscanner); |
265 |
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else |
266 |
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yy_push_state(PREPROC_PRE_BODY_EAT, yyscanner); |
267 |
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} |
268 |
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<PREPROC_PRE_BODY_USE>[ \t]*")" { |
269 |
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yy_pop_state(yyscanner); |
270 |
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yy_push_state(PREPROC_BODY_USE, yyscanner); |
271 |
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} |
272 |
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<PREPROC_PRE_BODY_EAT>[ \t]*")" { |
273 |
schoenebeck |
3308 |
//printf("PREPROCESSOR EAT : {%s}\n", yytext); |
274 |
schoenebeck |
2581 |
yy_pop_state(yyscanner); |
275 |
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yy_push_state(PREPROC_BODY_EAT, yyscanner); |
276 |
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} |
277 |
schoenebeck |
3308 |
<PREPROC_BODY_EAT,PREPROC_BODY_USE>"END_USE_CODE" { |
278 |
schoenebeck |
2588 |
//printf("-->END_USE_CODE\n"); |
279 |
schoenebeck |
2581 |
yy_pop_state(yyscanner); |
280 |
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} |
281 |
schoenebeck |
2888 |
<PREPROC_BODY_EAT>[ \t\r\n]* { /* eat up code block filtered out by preprocessor */ |
282 |
schoenebeck |
3308 |
//printf("PREPROCESSOR EAT2 : {%s}\n", yytext); |
283 |
schoenebeck |
2888 |
processLocation(); |
284 |
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} |
285 |
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<PREPROC_BODY_EAT>.* { /* eat up code block filtered out by preprocessor */ |
286 |
schoenebeck |
3308 |
//printf("PREPROCESSOR EAT3 : {%s}\n", yytext); |
287 |
schoenebeck |
3285 |
yyextra->addPreprocessorComment(yylloc->first_line, yylloc->last_line, |
288 |
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yylloc->first_column+1, yylloc->last_column+1); |
289 |
schoenebeck |
2888 |
} |
290 |
schoenebeck |
2581 |
|
291 |
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292 |
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/* Language keywords */ |
293 |
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294 |
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"on" return ON; |
295 |
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"end" return END; |
296 |
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"note" return NOTE; |
297 |
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"init" return INIT; |
298 |
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"declare" return DECLARE; |
299 |
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"while" return WHILE; |
300 |
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"if" return IF; |
301 |
schoenebeck |
2935 |
".or." return BITWISE_OR; |
302 |
schoenebeck |
2581 |
"or" return OR; |
303 |
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"release" return RELEASE; |
304 |
schoenebeck |
2935 |
".and." return BITWISE_AND; |
305 |
schoenebeck |
2581 |
"and" return AND; |
306 |
schoenebeck |
2935 |
".not." return BITWISE_NOT; |
307 |
schoenebeck |
2581 |
"not" return NOT; |
308 |
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"else" return ELSE; |
309 |
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"controller" return CONTROLLER; |
310 |
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"case" return CASE; |
311 |
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"select" return SELECT; |
312 |
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"to" return TO; |
313 |
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"<=" return LE; |
314 |
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">=" return GE; |
315 |
schoenebeck |
2585 |
"const" return CONST_; // note: "CONST" is already defined for C/C++ compilers on Windows by default |
316 |
schoenebeck |
2581 |
"polyphonic" return POLYPHONIC; |
317 |
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"mod" return MOD; |
318 |
schoenebeck |
2951 |
"function" return FUNCTION; |
319 |
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"call" return CALL; |
320 |
schoenebeck |
3260 |
"synchronized" return SYNCHRONIZED; |
321 |
schoenebeck |
2581 |
|
322 |
schoenebeck |
3561 |
[&,!()[\]<>=*+#\/-] { |
323 |
schoenebeck |
2935 |
return *yytext; |
324 |
schoenebeck |
2581 |
} |
325 |
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|
326 |
schoenebeck |
2935 |
("$"|"@"|"%"){ID} { |
327 |
schoenebeck |
2581 |
yylval->sValue = strdup(yytext); |
328 |
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return VARIABLE; |
329 |
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} |
330 |
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331 |
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{ID} { |
332 |
|
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yylval->sValue = strdup(yytext); |
333 |
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return IDENTIFIER; |
334 |
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} |
335 |
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336 |
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":=" return ASSIGNMENT; |
337 |
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338 |
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\n+ { |
339 |
schoenebeck |
2888 |
yylineno += countNewLineChars(yytext); |
340 |
|
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yycolumn = 0; |
341 |
schoenebeck |
2581 |
//printf("lex: new line %d\n", yylineno, yytext); |
342 |
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//return LF; |
343 |
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} |
344 |
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|
345 |
schoenebeck |
2888 |
"{"[^}]*"}" { /* eat up comments */ |
346 |
|
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processLocation(); |
347 |
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} |
348 |
schoenebeck |
2581 |
|
349 |
|
|
[ \t\r]+ /* eat up whitespace */ |
350 |
|
|
|
351 |
schoenebeck |
3259 |
. { |
352 |
|
|
printf( "Unrecognized character: '%s' (line %d, column %d)\n", yytext, yylineno, yycolumn); |
353 |
|
|
return UNKNOWN_CHAR; |
354 |
|
|
} |
355 |
schoenebeck |
2581 |
|
356 |
|
|
%% |
357 |
|
|
|
358 |
|
|
namespace LinuxSampler { |
359 |
|
|
|
360 |
|
|
void ParserContext::createScanner(std::istream* is) { |
361 |
|
|
if (scanner) destroyScanner(); |
362 |
|
|
this->is = is; |
363 |
|
|
yylex_init(&scanner); |
364 |
|
|
yyset_extra(this, scanner); |
365 |
|
|
} |
366 |
|
|
|
367 |
|
|
void ParserContext::destroyScanner() { |
368 |
|
|
if (!scanner) return; |
369 |
|
|
yylex_destroy(scanner); |
370 |
|
|
scanner = NULL; |
371 |
|
|
} |
372 |
|
|
|
373 |
|
|
} // namespace LinuxSampler |