src/scriptvm/scanner.l

/*
 * Copyright (c) 2014-2017 Christian Schoenebeck and Andreas Persson
 *
 * http://www.linuxsampler.org
 *
 * This file is part of LinuxSampler and released under the same terms.
 * See README file for details.
 */

/* Token scanner for NKSP real-time instrument script language. */

%{

#include "parser_shared.h"
#include <math.h>
// reentrant scanner data context
#define YY_EXTRA_TYPE ParserContext*
// set line number each time a token is recognized
#define YY_USER_ACTION                  \
{                                       \
    yylloc->first_line = yylineno;      \
    yylloc->last_line  = yylineno;      \
    yylloc->first_column = yycolumn;    \
    yycolumn += yyleng;                 \
    yylloc->last_column = yycolumn - 1; \
    /*printf("lex: line '%s'\n", yytext);*/  \
}
// custom (f)lex input for reading from std::istream object
#define YY_INPUT(buf,result,max_size)   \
{                                       \
    char c = yyextra->is->get();        \
    if (yyextra->is->eof())             \
        result = YY_NULL;               \
    else {                              \
        buf[0] = c;                     \
        result = 1;                     \
    }                                   \
}

static void scanner_error(YYLTYPE* locp, LinuxSampler::ParserContext* context, const char* err) {
    context->addErr(locp->first_line, locp->last_line, locp->first_column, locp->last_column, err);
}

static void scanner_warning(YYLTYPE* locp, LinuxSampler::ParserContext* context, const char* txt) {
    context->addWrn(locp->first_line, locp->last_line, locp->first_column, locp->last_column, txt);
}

#define SCANNER_ERR(txt)  scanner_error(yylloc, yyextra, txt)
#define SCANNER_WRN(txt)  scanner_warning(yylloc, yyextra, txt)

// shut up warning that 'register' keyword is deprecated as of C++11
#if defined(__cplusplus) && __cplusplus >= 201103L
# define register
#endif

using namespace LinuxSampler;

static int countNewLineChars(const char* txt) {
    int n = 0;
    for (int i = 0; txt[i]; ++i)
        if (txt[i] == '\n') ++n;
    return n;
}

static int countCharsPastLastNewLine(const char* txt) {
    const int n = (int)strlen(txt);
    for (int i = n - 1; i >= 0; --i)
        if (txt[i] == '\n')
            return n - i - 1;
    return n;
}

#define processLocation() { \
    const int nl = countNewLineChars(yytext); \
    yylineno += nl; \
    if (nl) yycolumn = countCharsPastLastNewLine(yytext); \
}

// if compiled for debugging, throw an exception instead of exiting on fatal
// lexer errors (so the debugger may pause with the appropriate back trace)
#if DEBUG
# include <stdexcept>
# define YY_FATAL_ERROR(msg) throw std::runtime_error(msg)
#endif

%}

/* use Flex's built-in support for line numbers
   (disabled, because it seems to be unreliable, so we are using our own
   tracking code in the respective scanner rules below) */
/*%option yylineno*/
/* generate a reentrant safe scanner */
%option reentrant
/* avoid symbol collision with other (i.e. future) scanner symbols */
%option prefix="InstrScript_"
/* bison-bridge adds an argument yylval to yylex, and bison-locations adds an
   argument code yylloc for location tracking. */
%option bison-bridge
%option bison-locations
/* yywrap() would be called at EOF, we don't need it */
%option noyywrap
/* enable functions yy_push_state(), yy_pop_state(), yy_top_state() */
%option stack

/* inclusive scanner conditions */
%s PREPROC_BODY_USE
/* exclusive scanner conditions */
%x PREPROC_SET_COND PREPROC_RESET_COND PREPROC_IF PREPROC_IF_NOT PREPROC_BODY_EAT PREPROC_PRE_BODY_USE PREPROC_PRE_BODY_EAT

DIGIT    [0-9]
ID       [a-zA-Z][a-zA-Z0-9_]*
METRIC   (k|h|(da)|d|c|m|u)
UNIT     (s|(Hz)|B)

%%

\"[^"]*\" {
    yylval->sValue = strdup(yytext + 1);
    yylval->sValue[strlen(yylval->sValue) - 1] = '\0';
    return STRING;
}

{DIGIT}+ {
    if (sizeof(vmint) < 8)
        yylval->iValue = atoi(yytext);
    else
        yylval->iValue = atoll(yytext);
    return INTEGER;
}

{DIGIT}+"."{DIGIT}+ {
    yylval->fValue = atof(yytext);
    return REAL;
}

{DIGIT}+({METRIC}{1,2}|({METRIC}{0,2}{UNIT}?)) {
    int pos = 0;

    // parse number portion
    vmint value = 0;
    for (; yytext[pos] >= '0' && yytext[pos] <= '9'; ++pos) {
        value *= 10;
        value += yytext[pos] - '0';
    }
    yylval->iUnitValue.iValue = value;

    // parse metric prefix portion
    for (int i = 0; i < 2; ++i, ++pos) {
        switch (yytext[pos]) {
            case 'k': yylval->iUnitValue.prefix[i] = VM_KILO;  continue;
            case 'h': yylval->iUnitValue.prefix[i] = VM_HECTO; continue;
            case 'c': yylval->iUnitValue.prefix[i] = VM_CENTI; continue;
            case 'm': yylval->iUnitValue.prefix[i] = VM_MILLI; continue;
            case 'u': yylval->iUnitValue.prefix[i] = VM_MICRO; continue;
            case 'd':
                if (yytext[pos+1] == 'a') {
                    yylval->iUnitValue.prefix[i] = VM_DECA;
                    ++pos;
                } else {
                    yylval->iUnitValue.prefix[i] = VM_DECI;
                }
                continue;
            default:
                yylval->iUnitValue.prefix[i] = VM_NO_PREFIX;
                goto parseIntStdUnit;
        }
    }

    parseIntStdUnit:

    // parse standard measurement unit
    switch (yytext[pos]) {
        case 's': yylval->iUnitValue.unit = VM_SECOND;  break;
        case 'H': yylval->iUnitValue.unit = VM_HERTZ;   break;
        case 'B': yylval->iUnitValue.unit = VM_BEL;     break;
        default:  yylval->iUnitValue.unit = VM_NO_UNIT; break;
    }

    return INTEGER_UNIT;
}

{DIGIT}+"."{DIGIT}+({METRIC}{1,2}|({METRIC}{0,2}{UNIT}?)) {
    int pos = 0;

    // parse number portion
    for (; (yytext[pos] >= '0' && yytext[pos] <= '9') || yytext[pos] == '.'; ++pos) {
    }
    {
        const char tmp = yytext[pos];
        yytext[pos] = 0; // mark temporary end of string
        yylval->fUnitValue.fValue = atof(yytext);
        yytext[pos] = tmp; // restore
    }

    // parse metric prefix portion
    for (int i = 0; i < 2; ++i, ++pos) {
        switch (yytext[pos]) {
            case 'k': yylval->fUnitValue.prefix[i] = VM_KILO;  continue;
            case 'h': yylval->fUnitValue.prefix[i] = VM_HECTO; continue;
            case 'c': yylval->fUnitValue.prefix[i] = VM_CENTI; continue;
            case 'm': yylval->fUnitValue.prefix[i] = VM_MILLI; continue;
            case 'u': yylval->fUnitValue.prefix[i] = VM_MICRO; continue;
            case 'd':
                if (yytext[pos+1] == 'a') {
                    yylval->fUnitValue.prefix[i] = VM_DECA;
                    ++pos;
                } else {
                    yylval->fUnitValue.prefix[i] = VM_DECI;
                }
                continue;
            default:
                yylval->fUnitValue.prefix[i] = VM_NO_PREFIX;
                goto parseRealStdUnit;
        }
    }

    parseRealStdUnit:

    // parse standard measurement unit
    switch (yytext[pos]) {
        case 's': yylval->fUnitValue.unit = VM_SECOND;  break;
        case 'H': yylval->fUnitValue.unit = VM_HERTZ;   break;
        case 'B': yylval->fUnitValue.unit = VM_BEL;     break;
        default:  yylval->fUnitValue.unit = VM_NO_UNIT; break;
    }

    return REAL_UNIT;
}


 /* Preprocessor statement:  SET_CONDITION(name) */

<*>"SET_CONDITION"[ \t]*"(" {
    //printf("SET_CONDITION\n");
    yy_push_state(PREPROC_SET_COND, yyscanner);
}
<PREPROC_SET_COND>{ID} {
    //printf("preproc set condition '%s'\n", yytext);
    bool success = yyextra->setPreprocessorCondition(yytext);
    if (!success) {
        SCANNER_WRN((String("Preprocessor: Condition '") +
                    yytext + "' is already set.").c_str());
    }
}
<PREPROC_SET_COND>[ \t]*")" {
    //printf("End of PREPROC_SET_COND\n");
    yy_pop_state(yyscanner);
}


 /* Preprocessor statement:  RESET_CONDITION(name) */

<*>"RESET_CONDITION"[ \t]*"(" {
    //printf("RESET_CONDITION\n");
    yy_push_state(PREPROC_RESET_COND, yyscanner);
}
<PREPROC_RESET_COND>{ID} {
    //printf("preproc reset condition '%s'\n", yytext);
    bool success = yyextra->resetPreprocessorCondition(yytext);
    if (!success) {
        SCANNER_ERR((String("Preprocessor: could not reset condition '") +
                    yytext + "' (either not set or a built-in condition).").c_str());
    }
}
<PREPROC_RESET_COND>[ \t]*")" {
    //printf("End of RESET_CONDITION\n");
    yy_pop_state(yyscanner);
}


 /* Preprocessor conditional statements:

    USE_CODE_IF(name)
      ...
    END_USE_CODE

    and:

    USE_CODE_IF_NOT(name)
      ...
    END_USE_CODE    
 */

<*>"USE_CODE_IF"[ \t]*"(" {
    //printf("{%s}\n", yytext);
    yy_push_state(PREPROC_IF, yyscanner);
}
<PREPROC_BODY_EAT>"USE_CODE_IF"[ \t]*"("{ID}")" {
    //printf("[EAT{%s}\n", yytext);
    yy_push_state(PREPROC_BODY_EAT, yyscanner);
}
<*>"USE_CODE_IF_NOT"[ \t]*"(" {
    //printf("USE_CODE_IF_NOT\n");
    yy_push_state(PREPROC_IF_NOT, yyscanner);
}
<PREPROC_BODY_EAT>"USE_CODE_IF_NOT"[ \t]*"("{ID}")" {
    //printf("[EAT{%s}\n", yytext);
    yy_push_state(PREPROC_BODY_EAT, yyscanner);
}
<PREPROC_IF>{ID} {
    //printf("preproc use code if '%s'\n", yytext);
    yy_pop_state(yyscanner);
    if (yyextra->isPreprocessorConditionSet(yytext))
        yy_push_state(PREPROC_PRE_BODY_USE, yyscanner);
    else
        yy_push_state(PREPROC_PRE_BODY_EAT, yyscanner);
}
<PREPROC_IF_NOT>{ID} {
    //printf("preproc use code if not '%s'\n", yytext);
    yy_pop_state(yyscanner);
    if (!yyextra->isPreprocessorConditionSet(yytext))
        yy_push_state(PREPROC_PRE_BODY_USE, yyscanner);
    else
        yy_push_state(PREPROC_PRE_BODY_EAT, yyscanner);
}
<PREPROC_PRE_BODY_USE>[ \t]*")" {
    yy_pop_state(yyscanner);
    yy_push_state(PREPROC_BODY_USE, yyscanner);
}
<PREPROC_PRE_BODY_EAT>[ \t]*")" {
    //printf("PREPROCESSOR EAT : {%s}\n", yytext);
    yy_pop_state(yyscanner);
    yy_push_state(PREPROC_BODY_EAT, yyscanner);
}
<PREPROC_BODY_EAT,PREPROC_BODY_USE>"END_USE_CODE" {
    //printf("-->END_USE_CODE\n");
    yy_pop_state(yyscanner);
}
<PREPROC_BODY_EAT>[ \t\r\n]* { /* eat up code block filtered out by preprocessor */
    //printf("PREPROCESSOR EAT2 : {%s}\n", yytext);
    processLocation();
}
<PREPROC_BODY_EAT>.* { /* eat up code block filtered out by preprocessor */
    //printf("PREPROCESSOR EAT3 : {%s}\n", yytext);
    yyextra->addPreprocessorComment(yylloc->first_line, yylloc->last_line,
                                    yylloc->first_column+1, yylloc->last_column+1);
}


 /* Language keywords */

"on" return ON;
"end" return END;
"note" return NOTE;
"init" return INIT;
"declare" return DECLARE;
"while" return WHILE;
"if" return IF;
".or." return BITWISE_OR;
"or" return OR;
"release" return RELEASE;
".and." return BITWISE_AND;
"and" return AND;
".not." return BITWISE_NOT;
"not" return NOT;
"else" return ELSE;
"controller" return CONTROLLER;
"case" return CASE;
"select" return SELECT;
"to" return TO;
"<=" return LE;
">=" return GE;
"const" return CONST_; // note: "CONST" is already defined for C/C++ compilers on Windows by default
"polyphonic" return POLYPHONIC;
"mod" return MOD;
"function" return FUNCTION;
"call" return CALL;
"synchronized" return SYNCHRONIZED;

[&,!()[\]<>=*+#\/-] {
    return *yytext;
}

("$"|"@"|"%"|"~"|"?"){ID} {
    yylval->sValue = strdup(yytext);
    return VARIABLE;
}

{ID} {
    yylval->sValue = strdup(yytext);
    return IDENTIFIER;
}

":=" return ASSIGNMENT;

\n+ {
     yylineno += countNewLineChars(yytext);
     yycolumn = 0;
    //printf("lex: new line %d\n", yylineno, yytext);
    //return LF;
}

"{"[^}]*"}" { /* eat up comments */
    processLocation();
}

[ \t\r]+ /* eat up whitespace */

. {
    printf( "Unrecognized character: '%s' (line %d, column %d)\n", yytext, yylineno, yycolumn);
    return UNKNOWN_CHAR;
}

%%

namespace LinuxSampler {

void ParserContext::createScanner(std::istream* is) {
   if (scanner) destroyScanner();
   this->is = is;
   yylex_init(&scanner);
   yyset_extra(this, scanner);
}

void ParserContext::destroyScanner() {
   if (!scanner) return;
   yylex_destroy(scanner);
   scanner = NULL;
}

} // namespace LinuxSampler
1	schoenebeck	2581	/*
2	schoenebeck	3259	* Copyright (c) 2014-2017 Christian Schoenebeck and Andreas Persson
3	schoenebeck	2581	*
4			* http://www.linuxsampler.org
5			*
6			* This file is part of LinuxSampler and released under the same terms.
7			* See README file for details.
8			*/
9
10	schoenebeck	2888	/* Token scanner for NKSP real-time instrument script language. */
11	schoenebeck	2581
12			%{
13
14			#include "parser_shared.h"
15			#include <math.h>
16			// reentrant scanner data context
17			#define YY_EXTRA_TYPE ParserContext*
18			// set line number each time a token is recognized
19			#define YY_USER_ACTION \
20			{ \
21			yylloc->first_line = yylineno; \
22			yylloc->last_line = yylineno; \
23	schoenebeck	2888	yylloc->first_column = yycolumn; \
24			yycolumn += yyleng; \
25			yylloc->last_column = yycolumn - 1; \
26	schoenebeck	2581	/printf("lex: line '%s'\n", yytext);/ \
27			}
28			// custom (f)lex input for reading from std::istream object
29			#define YY_INPUT(buf,result,max_size) \
30			{ \
31			char c = yyextra->is->get(); \
32			if (yyextra->is->eof()) \
33			result = YY_NULL; \
34			else { \
35			buf[0] = c; \
36			result = 1; \
37			} \
38			}
39
40			static void scanner_error(YYLTYPE* locp, LinuxSampler::ParserContext* context, const char* err) {
41	schoenebeck	2889	context->addErr(locp->first_line, locp->last_line, locp->first_column, locp->last_column, err);
42	schoenebeck	2581	}
43
44			static void scanner_warning(YYLTYPE* locp, LinuxSampler::ParserContext* context, const char* txt) {
45	schoenebeck	2889	context->addWrn(locp->first_line, locp->last_line, locp->first_column, locp->last_column, txt);
46	schoenebeck	2581	}
47
48			#define SCANNER_ERR(txt) scanner_error(yylloc, yyextra, txt)
49			#define SCANNER_WRN(txt) scanner_warning(yylloc, yyextra, txt)
50
51	schoenebeck	3054	// shut up warning that 'register' keyword is deprecated as of C++11
52			#if defined(__cplusplus) && __cplusplus >= 201103L
53			# define register
54			#endif
55
56	schoenebeck	2581	using namespace LinuxSampler;
57
58	schoenebeck	2888	static int countNewLineChars(const char* txt) {
59			int n = 0;
60			for (int i = 0; txt[i]; ++i)
61			if (txt[i] == '\n') ++n;
62			return n;
63			}
64
65			static int countCharsPastLastNewLine(const char* txt) {
66	schoenebeck	3054	const int n = (int)strlen(txt);
67	schoenebeck	2888	for (int i = n - 1; i >= 0; --i)
68			if (txt[i] == '\n')
69			return n - i - 1;
70			return n;
71			}
72
73			#define processLocation() { \
74			const int nl = countNewLineChars(yytext); \
75			yylineno += nl; \
76			if (nl) yycolumn = countCharsPastLastNewLine(yytext); \
77			}
78
79	schoenebeck	3308	// if compiled for debugging, throw an exception instead of exiting on fatal
80			// lexer errors (so the debugger may pause with the appropriate back trace)
81			#if DEBUG
82			# include <stdexcept>
83			# define YY_FATAL_ERROR(msg) throw std::runtime_error(msg)
84			#endif
85
86	schoenebeck	2581	%}
87
88	schoenebeck	2888	/* use Flex's built-in support for line numbers
89			(disabled, because it seems to be unreliable, so we are using our own
90			tracking code in the respective scanner rules below) */
91			/%option yylineno/
92	schoenebeck	2581	/* generate a reentrant safe scanner */
93			%option reentrant
94			/* avoid symbol collision with other (i.e. future) scanner symbols */
95			%option prefix="InstrScript_"
96			/* bison-bridge adds an argument yylval to yylex, and bison-locations adds an
97			argument code yylloc for location tracking. */
98			%option bison-bridge
99			%option bison-locations
100			/* yywrap() would be called at EOF, we don't need it */
101			%option noyywrap
102			/* enable functions yy_push_state(), yy_pop_state(), yy_top_state() */
103			%option stack
104
105			/* inclusive scanner conditions */
106			%s PREPROC_BODY_USE
107			/* exclusive scanner conditions */
108			%x PREPROC_SET_COND PREPROC_RESET_COND PREPROC_IF PREPROC_IF_NOT PREPROC_BODY_EAT PREPROC_PRE_BODY_USE PREPROC_PRE_BODY_EAT
109
110			DIGIT [0-9]
111	schoenebeck	3561	ID [a-zA-Z][a-zA-Z0-9_]*
112			METRIC (k\|h\|(da)\|d\|c\|m\|u)
113			UNIT (s\|(Hz)\|B)
114	schoenebeck	2581
115			%%
116
117			\"[^"]*\" {
118			yylval->sValue = strdup(yytext + 1);
119			yylval->sValue[strlen(yylval->sValue) - 1] = '\0';
120			return STRING;
121			}
122
123			{DIGIT}+ {
124	schoenebeck	3557	if (sizeof(vmint) < 8)
125			yylval->iValue = atoi(yytext);
126			else
127			yylval->iValue = atoll(yytext);
128	schoenebeck	2581	return INTEGER;
129			}
130
131	schoenebeck	3573	{DIGIT}+"."{DIGIT}+ {
132			yylval->fValue = atof(yytext);
133			return REAL;
134			}
135
136	schoenebeck	3561	{DIGIT}+({METRIC}{1,2}\|({METRIC}{0,2}{UNIT}?)) {
137			int pos = 0;
138
139			// parse number portion
140			vmint value = 0;
141			for (; yytext[pos] >= '0' && yytext[pos] <= '9'; ++pos) {
142			value *= 10;
143			value += yytext[pos] - '0';
144			}
145			yylval->iUnitValue.iValue = value;
146
147			// parse metric prefix portion
148			for (int i = 0; i < 2; ++i, ++pos) {
149			switch (yytext[pos]) {
150			case 'k': yylval->iUnitValue.prefix[i] = VM_KILO; continue;
151			case 'h': yylval->iUnitValue.prefix[i] = VM_HECTO; continue;
152			case 'c': yylval->iUnitValue.prefix[i] = VM_CENTI; continue;
153			case 'm': yylval->iUnitValue.prefix[i] = VM_MILLI; continue;
154			case 'u': yylval->iUnitValue.prefix[i] = VM_MICRO; continue;
155			case 'd':
156			if (yytext[pos+1] == 'a') {
157			yylval->iUnitValue.prefix[i] = VM_DECA;
158			++pos;
159			} else {
160			yylval->iUnitValue.prefix[i] = VM_DECI;
161			}
162			continue;
163			default:
164			yylval->iUnitValue.prefix[i] = VM_NO_PREFIX;
165	schoenebeck	3573	goto parseIntStdUnit;
166	schoenebeck	3561	}
167			}
168
169	schoenebeck	3573	parseIntStdUnit:
170	schoenebeck	3561
171			// parse standard measurement unit
172			switch (yytext[pos]) {
173			case 's': yylval->iUnitValue.unit = VM_SECOND; break;
174			case 'H': yylval->iUnitValue.unit = VM_HERTZ; break;
175			case 'B': yylval->iUnitValue.unit = VM_BEL; break;
176			default: yylval->iUnitValue.unit = VM_NO_UNIT; break;
177			}
178
179			return INTEGER_UNIT;
180			}
181
182	schoenebeck	3573	{DIGIT}+"."{DIGIT}+({METRIC}{1,2}\|({METRIC}{0,2}{UNIT}?)) {
183			int pos = 0;
184	schoenebeck	2581
185	schoenebeck	3573	// parse number portion
186			for (; (yytext[pos] >= '0' && yytext[pos] <= '9') \|\| yytext[pos] == '.'; ++pos) {
187			}
188			{
189			const char tmp = yytext[pos];
190			yytext[pos] = 0; // mark temporary end of string
191			yylval->fUnitValue.fValue = atof(yytext);
192			yytext[pos] = tmp; // restore
193			}
194	schoenebeck	2581
195	schoenebeck	3573	// parse metric prefix portion
196			for (int i = 0; i < 2; ++i, ++pos) {
197			switch (yytext[pos]) {
198			case 'k': yylval->fUnitValue.prefix[i] = VM_KILO; continue;
199			case 'h': yylval->fUnitValue.prefix[i] = VM_HECTO; continue;
200			case 'c': yylval->fUnitValue.prefix[i] = VM_CENTI; continue;
201			case 'm': yylval->fUnitValue.prefix[i] = VM_MILLI; continue;
202			case 'u': yylval->fUnitValue.prefix[i] = VM_MICRO; continue;
203			case 'd':
204			if (yytext[pos+1] == 'a') {
205			yylval->fUnitValue.prefix[i] = VM_DECA;
206			++pos;
207			} else {
208			yylval->fUnitValue.prefix[i] = VM_DECI;
209			}
210			continue;
211			default:
212			yylval->fUnitValue.prefix[i] = VM_NO_PREFIX;
213			goto parseRealStdUnit;
214			}
215			}
216
217			parseRealStdUnit:
218
219			// parse standard measurement unit
220			switch (yytext[pos]) {
221			case 's': yylval->fUnitValue.unit = VM_SECOND; break;
222			case 'H': yylval->fUnitValue.unit = VM_HERTZ; break;
223			case 'B': yylval->fUnitValue.unit = VM_BEL; break;
224			default: yylval->fUnitValue.unit = VM_NO_UNIT; break;
225			}
226
227			return REAL_UNIT;
228			}
229
230
231	schoenebeck	2581	/* Preprocessor statement: SET_CONDITION(name) */
232
233			<>"SET_CONDITION"[ \t]"(" {
234	schoenebeck	2588	//printf("SET_CONDITION\n");
235	schoenebeck	2581	yy_push_state(PREPROC_SET_COND, yyscanner);
236			}
237			<PREPROC_SET_COND>{ID} {
238	schoenebeck	2588	//printf("preproc set condition '%s'\n", yytext);
239	schoenebeck	2581	bool success = yyextra->setPreprocessorCondition(yytext);
240			if (!success) {
241			SCANNER_WRN((String("Preprocessor: Condition '") +
242			yytext + "' is already set.").c_str());
243			}
244			}
245			<PREPROC_SET_COND>[ \t]*")" {
246	schoenebeck	2588	//printf("End of PREPROC_SET_COND\n");
247	schoenebeck	2581	yy_pop_state(yyscanner);
248			}
249
250
251			/* Preprocessor statement: RESET_CONDITION(name) */
252
253			<>"RESET_CONDITION"[ \t]"(" {
254	schoenebeck	2588	//printf("RESET_CONDITION\n");
255	schoenebeck	2581	yy_push_state(PREPROC_RESET_COND, yyscanner);
256			}
257			<PREPROC_RESET_COND>{ID} {
258	schoenebeck	2588	//printf("preproc reset condition '%s'\n", yytext);
259	schoenebeck	2581	bool success = yyextra->resetPreprocessorCondition(yytext);
260			if (!success) {
261			SCANNER_ERR((String("Preprocessor: could not reset condition '") +
262			yytext + "' (either not set or a built-in condition).").c_str());
263			}
264			}
265			<PREPROC_RESET_COND>[ \t]*")" {
266	schoenebeck	2588	//printf("End of RESET_CONDITION\n");
267	schoenebeck	2581	yy_pop_state(yyscanner);
268			}
269
270
271			/* Preprocessor conditional statements:
272
273			USE_CODE_IF(name)
274			...
275			END_USE_CODE
276
277			and:
278
279			USE_CODE_IF_NOT(name)
280			...
281			END_USE_CODE
282			*/
283
284			<>"USE_CODE_IF"[ \t]"(" {
285	schoenebeck	3308	//printf("{%s}\n", yytext);
286	schoenebeck	2581	yy_push_state(PREPROC_IF, yyscanner);
287			}
288	schoenebeck	3308	<PREPROC_BODY_EAT>"USE_CODE_IF"[ \t]*"("{ID}")" {
289			//printf("[EAT{%s}\n", yytext);
290			yy_push_state(PREPROC_BODY_EAT, yyscanner);
291			}
292	schoenebeck	2581	<>"USE_CODE_IF_NOT"[ \t]"(" {
293	schoenebeck	2588	//printf("USE_CODE_IF_NOT\n");
294	schoenebeck	2581	yy_push_state(PREPROC_IF_NOT, yyscanner);
295			}
296	schoenebeck	3308	<PREPROC_BODY_EAT>"USE_CODE_IF_NOT"[ \t]*"("{ID}")" {
297			//printf("[EAT{%s}\n", yytext);
298			yy_push_state(PREPROC_BODY_EAT, yyscanner);
299			}
300	schoenebeck	2581	<PREPROC_IF>{ID} {
301	schoenebeck	2588	//printf("preproc use code if '%s'\n", yytext);
302	schoenebeck	2581	yy_pop_state(yyscanner);
303			if (yyextra->isPreprocessorConditionSet(yytext))
304			yy_push_state(PREPROC_PRE_BODY_USE, yyscanner);
305			else
306			yy_push_state(PREPROC_PRE_BODY_EAT, yyscanner);
307			}
308			<PREPROC_IF_NOT>{ID} {
309	schoenebeck	2588	//printf("preproc use code if not '%s'\n", yytext);
310	schoenebeck	2581	yy_pop_state(yyscanner);
311			if (!yyextra->isPreprocessorConditionSet(yytext))
312			yy_push_state(PREPROC_PRE_BODY_USE, yyscanner);
313			else
314			yy_push_state(PREPROC_PRE_BODY_EAT, yyscanner);
315			}
316			<PREPROC_PRE_BODY_USE>[ \t]*")" {
317			yy_pop_state(yyscanner);
318			yy_push_state(PREPROC_BODY_USE, yyscanner);
319			}
320			<PREPROC_PRE_BODY_EAT>[ \t]*")" {
321	schoenebeck	3308	//printf("PREPROCESSOR EAT : {%s}\n", yytext);
322	schoenebeck	2581	yy_pop_state(yyscanner);
323			yy_push_state(PREPROC_BODY_EAT, yyscanner);
324			}
325	schoenebeck	3308	<PREPROC_BODY_EAT,PREPROC_BODY_USE>"END_USE_CODE" {
326	schoenebeck	2588	//printf("-->END_USE_CODE\n");
327	schoenebeck	2581	yy_pop_state(yyscanner);
328			}
329	schoenebeck	2888	<PREPROC_BODY_EAT>[ \t\r\n]* { /* eat up code block filtered out by preprocessor */
330	schoenebeck	3308	//printf("PREPROCESSOR EAT2 : {%s}\n", yytext);
331	schoenebeck	2888	processLocation();
332			}
333			<PREPROC_BODY_EAT>.* { /* eat up code block filtered out by preprocessor */
334	schoenebeck	3308	//printf("PREPROCESSOR EAT3 : {%s}\n", yytext);
335	schoenebeck	3285	yyextra->addPreprocessorComment(yylloc->first_line, yylloc->last_line,
336			yylloc->first_column+1, yylloc->last_column+1);
337	schoenebeck	2888	}
338	schoenebeck	2581
339
340			/* Language keywords */
341
342			"on" return ON;
343			"end" return END;
344			"note" return NOTE;
345			"init" return INIT;
346			"declare" return DECLARE;
347			"while" return WHILE;
348			"if" return IF;
349	schoenebeck	2935	".or." return BITWISE_OR;
350	schoenebeck	2581	"or" return OR;
351			"release" return RELEASE;
352	schoenebeck	2935	".and." return BITWISE_AND;
353	schoenebeck	2581	"and" return AND;
354	schoenebeck	2935	".not." return BITWISE_NOT;
355	schoenebeck	2581	"not" return NOT;
356			"else" return ELSE;
357			"controller" return CONTROLLER;
358			"case" return CASE;
359			"select" return SELECT;
360			"to" return TO;
361			"<=" return LE;
362			">=" return GE;
363	schoenebeck	2585	"const" return CONST_; // note: "CONST" is already defined for C/C++ compilers on Windows by default
364	schoenebeck	2581	"polyphonic" return POLYPHONIC;
365			"mod" return MOD;
366	schoenebeck	2951	"function" return FUNCTION;
367			"call" return CALL;
368	schoenebeck	3260	"synchronized" return SYNCHRONIZED;
369	schoenebeck	2581
370	schoenebeck	3561	[&,!()[\]<>=*+#\/-] {
371	schoenebeck	2935	return *yytext;
372	schoenebeck	2581	}
373
374	schoenebeck	3573	("$"\|"@"\|"%"\|"~"\|"?"){ID} {
375	schoenebeck	2581	yylval->sValue = strdup(yytext);
376			return VARIABLE;
377			}
378
379			{ID} {
380			yylval->sValue = strdup(yytext);
381			return IDENTIFIER;
382			}
383
384			":=" return ASSIGNMENT;
385
386			\n+ {
387	schoenebeck	2888	yylineno += countNewLineChars(yytext);
388			yycolumn = 0;
389	schoenebeck	2581	//printf("lex: new line %d\n", yylineno, yytext);
390			//return LF;
391			}
392
393	schoenebeck	2888	"{"[^}]"}" { / eat up comments */
394			processLocation();
395			}
396	schoenebeck	2581
397			[ \t\r]+ /* eat up whitespace */
398
399	schoenebeck	3259	. {
400			printf( "Unrecognized character: '%s' (line %d, column %d)\n", yytext, yylineno, yycolumn);
401			return UNKNOWN_CHAR;
402			}
403	schoenebeck	2581
404			%%
405
406			namespace LinuxSampler {
407
408			void ParserContext::createScanner(std::istream* is) {
409			if (scanner) destroyScanner();
410			this->is = is;
411			yylex_init(&scanner);
412			yyset_extra(this, scanner);
413			}
414
415			void ParserContext::destroyScanner() {
416			if (!scanner) return;
417			yylex_destroy(scanner);
418			scanner = NULL;
419			}
420
421			} // namespace LinuxSampler