Annotation of parser3/src/main/compile.y, revision 1.125
1.105 paf 1: /** @file
1.106 paf 2: Parser: compiler(lexical parser and grammar).
3:
1.87 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.106 paf 5:
1.89 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.87 paf 7:
1.125 ! paf 8: $Id: compile.y,v 1.124.2.1 2001/04/16 11:26:42 paf Exp $
1.88 paf 9: */
10:
1.106 paf 11: /**
12: @todo parser4:
13: - cache compiled code from request to request. to do that...
14: -#: make method definitions, @CLASS, @BASE, @USE instructions,
1.88 paf 15: which would be executed afterwards, and actions
16: now performed at compile time would be delayed to run time.
1.106 paf 17: -#: make cache expiration on time and on disk-change of class source
18: -#: in apache use subpools for compiled class storage
19: -#: in iis make up specialized Pool object for that
1.24 paf 20: */
21:
1.1 paf 22: %{
1.90 paf 23: #define YYSTYPE Array/*<Operation>*/ *
1.9 paf 24: #define YYPARSE_PARAM pc
25: #define YYLEX_PARAM pc
26: #define YYDEBUG 1
1.106 paf 27: #define YYERROR_VERBOSE 1
1.9 paf 28: #define yyerror(msg) real_yyerror((parse_control *)pc, msg)
29: #define YYPRINT(file, type, value) yyprint(file, type, value)
1.1 paf 30:
1.108 paf 31: #include "pa_config_includes.h"
1.1 paf 32: #include <stdio.h>
33: #include <stdlib.h>
1.117 paf 34: #include <ctype.h>
1.1 paf 35:
36: #include "compile_tools.h"
1.8 paf 37: #include "pa_value.h"
1.12 paf 38: #include "pa_request.h"
1.39 paf 39: #include "pa_vobject.h"
1.52 paf 40: #include "pa_vdouble.h"
1.98 paf 41: #include "pa_globals.h"
1.120 paf 42: #include "pa_vunknown.h"
1.39 paf 43:
1.85 paf 44: #define SELF_ELEMENT_NAME "self"
1.97 paf 45: #define USE_CONTROL_METHOD_NAME "USE"
1.1 paf 46:
1.125 ! paf 47: static int real_yyerror(parse_control *pc, char *s);
1.9 paf 48: static void yyprint(FILE *file, int type, YYSTYPE value);
1.125 ! paf 49: static int yylex(YYSTYPE *lvalp, void *pc);
1.1 paf 50:
51:
1.8 paf 52: // local convinient inplace typecast & var
1.114 paf 53: #define PC (*(parse_control *)pc)
54: #define POOL (*PC.pool)
1.25 paf 55: #undef NEW
56: #define NEW new(POOL)
1.107 paf 57: #ifndef DOXYGEN
1.1 paf 58: %}
59:
60: %pure_parser
61:
1.13 paf 62: %token EON
1.4 paf 63: %token STRING
1.1 paf 64: %token BOGUS
1.55 paf 65:
1.58 paf 66: %token BAD_STRING_COMPARISON_OPERATOR
1.114 paf 67: %token BAD_HEX_LITERAL
1.58 paf 68:
1.59 paf 69: %token LAND "&&"
1.58 paf 70: %token LOR "||"
1.59 paf 71: %token LXOR "##"
1.58 paf 72:
73: %token NLE "<="
74: %token NGE ">="
75: %token NEQ "=="
76: %token NNE "!="
77:
78: %token SLT "lt"
79: %token SGT "gt"
80: %token SLE "le"
81: %token SGE "ge"
82: %token SEQ "eq"
83: %token SNE "ne"
84:
1.67 paf 85: %token DEF "def"
86: %token IN "in"
87: %token FEXISTS "-f"
1.95 paf 88: %token IS "is"
1.67 paf 89:
1.57 paf 90: /* logical */
1.95 paf 91: %left "is"
1.61 paf 92: %left "lt" "gt" "le" "ge"
93: %left "eq" "ne"
1.59 paf 94: %left '<' '>' "<=" ">=" "##"
1.57 paf 95: %left "==" "!="
96: %left "||"
97: %left "&&"
1.67 paf 98: %left "def" "in" "-f"
1.68 paf 99: %left '!'
1.57 paf 100:
101: /* bitwise */
1.59 paf 102: %left '#'
1.57 paf 103: %left '&' '|'
1.68 paf 104: %left '~'
1.57 paf 105:
1.56 paf 106: /* numerical */
1.55 paf 107: %left '-' '+'
1.57 paf 108: %left '*' '/' '%'
1.56 paf 109: %left NEG /* negation: unary - */
1.1 paf 110:
111: %%
1.88 paf 112: all:
1.10 paf 113: one_big_piece {
1.75 paf 114: Method& method=*NEW Method(POOL,
1.85 paf 115: *main_method_name,
1.122 paf 116: Method::CT_ANY,
1.81 paf 117: 0, 0, /*min, max numbered_params_count*/
1.75 paf 118: 0/*param_names*/, 0/*local_names*/,
119: $1/*parser_code*/, 0/*native_code*/);
1.114 paf 120: PC.cclass->add_method(*main_method_name, method);
1.10 paf 121: }
122: | methods;
123:
124: methods: method | methods method;
125: one_big_piece: maybe_codes;
126:
1.34 paf 127: method: control_method | code_method;
128:
129: control_method: '@' STRING '\n'
130: control_strings {
1.120 paf 131: const String& command=*LA2S($2);
1.34 paf 132: YYSTYPE strings_code=$4;
1.37 paf 133: if(strings_code->size()<1*2) {
1.114 paf 134: strcpy(PC.error, "@");
135: strcat(PC.error, command.cstr());
136: strcat(PC.error, " is empty");
1.37 paf 137: YYERROR;
138: }
1.74 paf 139: if(command==CLASS_NAME) {
1.124 paf 140: if(PC.cclass) { // already changed from default?
1.114 paf 141: strcpy(PC.error, "class already have a name '");
142: strncat(PC.error, PC.cclass->name().cstr(), 100);
143: strcat(PC.error, "'");
1.73 paf 144: YYERROR;
145: }
146: if(strings_code->size()==1*2) {
147: // new class' name
1.120 paf 148: const String *name=LA2S(strings_code);
1.73 paf 149: // creating the class
1.114 paf 150: PC.cclass=NEW VClass(POOL);
151: PC.cclass->set_name(*name);
1.73 paf 152: // append to request's classes
1.114 paf 153: PC.request->classes().put(*name, PC.cclass);
1.73 paf 154: } else {
1.114 paf 155: strcpy(PC.error, "@"CLASS_NAME" must contain sole name");
1.34 paf 156: YYERROR;
157: }
158: } else {
1.85 paf 159: if(command==USE_CONTROL_METHOD_NAME) {
1.109 paf 160: for(int i=0; i<strings_code->size(); i+=2)
1.114 paf 161: PC.request->use_file(
1.120 paf 162: PC.request->absolute(*LA2S(strings_code, i)));
1.74 paf 163: } else if(command==BASE_NAME) {
1.124 paf 164: if(PC.cclass->base()) { // already changed from default?
1.114 paf 165: strcpy(PC.error, "class already have a base '");
166: strncat(PC.error, PC.cclass->base()->name().cstr(), 100);
167: strcat(PC.error, "'");
1.73 paf 168: YYERROR;
169: }
1.45 paf 170: if(strings_code->size()==1*2) {
1.120 paf 171: const String& base_name=*LA2S(strings_code);
1.45 paf 172: VClass *base=static_cast<VClass *>(
1.114 paf 173: PC.request->classes().get(base_name));
1.45 paf 174: if(!base) {
1.114 paf 175: strcpy(PC.error, base_name.cstr());
176: strcat(PC.error, ": undefined class in @"BASE_NAME);
1.109 paf 177: YYERROR;
178: }
179: // @CLASS == @BASE sanity check
1.114 paf 180: if(PC.cclass==base) {
181: strcpy(PC.error, "@"CLASS_NAME" equals @"BASE_NAME);
1.34 paf 182: YYERROR;
183: }
1.114 paf 184: PC.cclass->set_base(*base);
1.45 paf 185: } else {
1.114 paf 186: strcpy(PC.error, "@"BASE_NAME" must contain sole name");
1.45 paf 187: YYERROR;
1.34 paf 188: }
189: } else {
1.114 paf 190: strcpy(PC.error, "'");
191: strncat(PC.error, command.cstr(), MAX_STRING/2);
192: strcat(PC.error, "' invalid special name. valid names are "
1.92 paf 193: "'"CLASS_NAME"', '"USE_CONTROL_METHOD_NAME"' and '"BASE_NAME"'");
1.34 paf 194: YYERROR;
195: }
196: }
197: };
1.37 paf 198: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
199: control_string: maybe_string '\n';
200: maybe_string: empty | STRING;
1.34 paf 201:
202: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 203: maybe_codes {
1.120 paf 204: const String *name=LA2S($2);
1.10 paf 205:
206: YYSTYPE params_names_code=$3;
1.75 paf 207: Array *params_names=0;
208: if(int size=params_names_code->size()) {
209: params_names=NEW Array(POOL);
210: for(int i=0; i<size; i+=2)
1.120 paf 211: *params_names+=LA2S(params_names_code, i);
1.75 paf 212: }
1.10 paf 213:
214: YYSTYPE locals_names_code=$4;
1.75 paf 215: Array *locals_names=0;
216: if(int size=locals_names_code->size()) {
217: locals_names=NEW Array(POOL);
218: for(int i=0; i<size; i+=2)
1.120 paf 219: *locals_names+=LA2S(locals_names_code, i);
1.75 paf 220: }
1.10 paf 221:
1.76 paf 222: Method& method=*NEW Method(POOL,
223: *name,
1.122 paf 224: Method::CT_ANY,
1.81 paf 225: 0, 0/*min,max numbered_params_count*/,
1.76 paf 226: params_names, locals_names,
227: $7, 0);
1.114 paf 228: PC.cclass->add_method(*name, method);
1.8 paf 229: };
1.10 paf 230:
231: maybe_bracketed_strings: empty | bracketed_maybe_strings;
232: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
233: maybe_strings: empty | strings;
234: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
235:
236: maybe_comment: empty | STRING;
1.1 paf 237:
238: /* codes */
239:
1.10 paf 240: maybe_codes: empty | codes;
241:
1.90 paf 242: codes: code | codes code { $$=$1; P($$, $2) };
1.81 paf 243: code: write_string | action;
1.1 paf 244: action: get | put | with | call;
245:
246: /* get */
247:
1.64 paf 248: get: get_value {
249: $$=$1; /* stack: resulting value */
1.102 paf 250: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.1 paf 251: };
1.64 paf 252: get_value: '$' get_name_value { $$=$2 }
253: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 254: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 255: name_without_curly_rdive:
256: name_without_curly_rdive_read
257: | name_without_curly_rdive_root
258: | name_without_curly_rdive_class;
1.19 paf 259: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 260: $$=N(POOL);
1.22 paf 261: Array *diving_code=$1;
1.120 paf 262: const String *first_name=LA2S(diving_code);
1.85 paf 263: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 264: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 265: P($$, diving_code,
266: /* skip over... */
267: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
268: } else {
1.54 paf 269: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 270: P($$, diving_code);
271: }
272: /* diving code; stack: current context */
1.1 paf 273: };
1.19 paf 274: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 275: $$=N(POOL);
1.54 paf 276: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 277: P($$, $2); /* diving code; stack: current context */
278: };
1.44 paf 279: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 280: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 281:
282: /* put */
283:
1.81 paf 284: put: '$' name_expr_wdive construct {
1.20 paf 285: $$=$2; /* stack: context,name */
1.52 paf 286: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 287: };
1.44 paf 288: name_expr_wdive:
289: name_expr_wdive_write
290: | name_expr_wdive_root
291: | name_expr_wdive_class;
1.28 paf 292: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 293: $$=N(POOL);
1.23 paf 294: Array *diving_code=$1;
1.120 paf 295: const String *first_name=LA2S(diving_code);
1.85 paf 296: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 297: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 298: P($$, diving_code,
299: /* skip over... */
300: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
301: } else {
1.54 paf 302: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 303: P($$, diving_code);
304: }
305: /* diving code; stack: current context */
1.20 paf 306: };
1.28 paf 307: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 308: $$=N(POOL);
1.54 paf 309: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 310: P($$, $2); /* diving code; stack: context,name */
1.1 paf 311: };
1.44 paf 312: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 313:
1.81 paf 314: construct: construct_by_code | construct_by_expr;
315: construct_by_code: '[' any_constructor_code_value ']' {
316: $$=$2; /* stack: context, name, value */
317: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
318: }
319: ;
1.90 paf 320: construct_by_expr: '(' expr_value ')' {
1.81 paf 321: $$=$2; /* stack: context, name, value */
322: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
323: }
1.52 paf 324: ;
1.55 paf 325: any_constructor_code_value:
1.120 paf 326: unknown_value /* optimized $var[] case */
1.52 paf 327: | STRING /* optimized $var[STRING] case */
1.55 paf 328: | constructor_code_value /* $var[something complex] */
1.1 paf 329: ;
1.55 paf 330: constructor_code_value: constructor_code {
1.25 paf 331: $$=N(POOL);
1.54 paf 332: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 333: P($$, $1); /* some code that writes to that context */
1.54 paf 334: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 335: };
1.55 paf 336: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 337: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
338:
1.1 paf 339: /* call */
340:
1.66 paf 341: call: call_value {
342: $$=$1; /* stack: value */
1.102 paf 343: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.66 paf 344: };
345: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 346: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 347: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.123 paf 348:
349: YYSTYPE params_code=$3;
350: if(params_code->size()==3) // probably [] case. [OP_VALUE + Unknown + STORE_PARAM]
351: if(Value *value=LA2V(params_code)) // it is OP_VALUE + value?
352: if(!value->is_defined()) // value is VUnknown?
353: params_code=0; // ^zzz[] case. don't append lone empty param.
354: if(params_code)
355: P($$, params_code); // filling method_frame.store_params
356: O($$, OP_CALL); // method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value
1.1 paf 357: };
358:
1.43 paf 359: call_name: name_without_curly_rdive;
1.38 paf 360:
1.9 paf 361: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 362: store_param:
363: store_square_param
364: | store_round_param
365: | store_curly_param
1.31 paf 366: ;
1.123 paf 367: store_square_param: '[' store_code_param_parts ']' {$$=$2};
1.69 paf 368: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.94 paf 369: store_curly_param: '{' store_curly_param_parts '}' {$$=$2};
1.69 paf 370: store_code_param_parts:
371: store_code_param_part
372: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
373: ;
374: store_expr_param_parts:
375: store_expr_param_part
376: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
377: ;
1.94 paf 378: store_curly_param_parts:
379: store_curly_param_part
380: | store_curly_param_parts ';' store_curly_param_part { $$=$1; P($$, $3) }
381: ;
1.120 paf 382: store_code_param_part: code_param_value {
1.32 paf 383: $$=$1;
1.54 paf 384: O($$, OP_STORE_PARAM);
1.120 paf 385: };
1.69 paf 386: store_expr_param_part: write_expr_value {
387: $$=N(POOL);
1.103 paf 388: PEA($$, $1);
1.69 paf 389: };
1.94 paf 390: store_curly_param_part: maybe_codes {
391: $$=N(POOL);
392: PCA($$, $1);
393: };
1.120 paf 394: code_param_value:
395: unknown_value /* optimized [;...] case */
396: | STRING /* optimized [STRING] case */
397: | constructor_code_value /* [something complex] */
398: ;
1.90 paf 399: write_expr_value: expr_value {
1.69 paf 400: $$=$1;
1.102 paf 401: O($$, OP_WRITE_EXPR_RESULT);
1.69 paf 402: };
1.1 paf 403:
404: /* name */
405:
1.20 paf 406: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 407:
1.9 paf 408: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 409: name_step: name_advance1 '.';
410: name_advance1: name_expr_value {
411: /* stack: context */
412: $$=$1; /* stack: context,name */
1.54 paf 413: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 414: };
415: name_advance2: name_expr_value {
416: /* stack: context */
417: $$=$1; /* stack: context,name */
1.54 paf 418: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 419: }
1.4 paf 420: | STRING BOGUS
1.1 paf 421: ;
422: name_expr_value:
1.4 paf 423: STRING /* subname_is_const */
1.1 paf 424: | name_expr_subvar_value /* $subname_is_var_value */
425: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
426: ;
427: name_expr_subvar_value: '$' subvar_ref_name_rdive {
428: $$=$2;
1.54 paf 429: O($$, OP_GET_ELEMENT);
1.1 paf 430: };
1.4 paf 431: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 432: $$=N(POOL);
1.54 paf 433: O($$, OP_CREATE_EWPOOL);
1.9 paf 434: P($$, $1);
1.102 paf 435: O($$, OP_WRITE_VALUE);
1.9 paf 436: P($$, $2);
1.54 paf 437: O($$, OP_REDUCE_EWPOOL);
1.1 paf 438: };
1.18 paf 439: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
440: subvar_ref_name_rdive_read: STRING {
1.25 paf 441: $$=N(POOL);
1.54 paf 442: O($$, OP_WITH_READ);
1.9 paf 443: P($$, $1);
1.1 paf 444: };
1.18 paf 445: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 446: $$=N(POOL);
1.54 paf 447: O($$, OP_WITH_ROOT);
1.18 paf 448: P($$, $2);
449: };
1.9 paf 450: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 451: subvar__get_write: '$' subvar_ref_name_rdive {
452: $$=$2;
1.54 paf 453: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 454: };
455:
1.44 paf 456: class_prefix: STRING ':' {
1.72 paf 457: $$=$1; // stack: class name string
458: O($$, OP_GET_CLASS);
1.1 paf 459: };
460:
461:
462: /* with */
463:
464: with: '$' name_without_curly_rdive '{' codes '}' {
465: $$=$2;
1.54 paf 466: O($$, OP_CREATE_RWPOOL);
1.9 paf 467: P($$, $4);
1.54 paf 468: O($$, OP_REDUCE_RWPOOL);
1.102 paf 469: O($$, OP_WRITE_VALUE);
1.1 paf 470: };
1.53 paf 471:
1.56 paf 472: /* expr */
1.53 paf 473:
1.81 paf 474: expr_value: expr {
475: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 476: change_string_literal_to_double_literal($$); // make that string literal Double
477: };
1.56 paf 478: expr:
1.62 paf 479: STRING
1.64 paf 480: | get_value
1.66 paf 481: | call_value
1.64 paf 482: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 483: | '(' expr ')' { $$ = $2; }
484: /* stack: operand // stack: @operand */
485: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 486: | '~' expr { $$=$2; O($$, OP_INV) }
487: | '!' expr { $$=$2; O($$, OP_NOT) }
488: | "def" expr { $$=$2; O($$, OP_DEF) }
489: | "in" expr { $$=$2; O($$, OP_IN) }
490: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 491: /* stack: a,b // stack: a@b */
492: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
493: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
494: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
495: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
496: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
497: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
498: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
499: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
500: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
501: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
502: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
503: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
504: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
505: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
506: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
507: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
508: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 509: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
510: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
511: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
512: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
513: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
514: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.95 paf 515: | expr "is" expr { $$=$1; P($$, $3); O($$, OP_IS) }
1.56 paf 516: ;
1.55 paf 517:
1.65 paf 518: string_inside_quotes_value: maybe_codes {
1.64 paf 519: $$=N(POOL);
520: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 521: P($$, $1); /* some code that writes to that context */
1.64 paf 522: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 523: };
1.1 paf 524:
1.27 paf 525: /* basics */
1.1 paf 526:
1.81 paf 527: write_string: STRING {
1.102 paf 528: // optimized from OP_STRING+OP_WRITE_VALUE to OP_STRING__WRITE
1.84 paf 529: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 530: };
531:
1.120 paf 532: unknown_value: /* empty */ { $$=VL(NEW VUnknown(POOL)) };
1.25 paf 533: empty: /* empty */ { $$=N(POOL) };
1.1 paf 534:
535: %%
1.105 paf 536: #endif
1.1 paf 537:
538: /*
539: 000$111(2222)00
540: 000$111{3333}00
1.9 paf 541: $,^: push,=0
1.1 paf 542: 1:( { break=pop
543: 2:( ) pop
544: 3:{ } pop
545:
546: 000^111(2222)4444{33333}4000
1.9 paf 547: $,^: push,=0
1.1 paf 548: 1:( { break=pop
549: 2:( )=4
550: 3:{ }=4
551: 4:[^({]=pop
552: */
553:
1.110 paf 554: static int yylex(YYSTYPE *lvalp, void *pc) {
1.114 paf 555: #define lexical_brackets_nestage PC.brackets_nestages[PC.sp]
1.48 paf 556: #define RC {result=c; goto break2; }
1.1 paf 557:
558: register int c;
559: int result;
560:
1.114 paf 561: if(PC.pending_state) {
562: result=PC.pending_state;
563: PC.pending_state=0;
1.1 paf 564: return result;
565: }
566:
1.114 paf 567: const char *begin=PC.source;
1.91 paf 568: const char *end;
1.114 paf 569: int begin_line=PC.line;
1.67 paf 570: int skip_analized=0;
1.50 paf 571: while(true) {
1.114 paf 572: c=*(end=(PC.source++));
1.1 paf 573:
1.4 paf 574: if(c=='\n') {
1.114 paf 575: PC.line++;
576: PC.col=0;
1.10 paf 577: } else
1.114 paf 578: PC.col++;
1.73 paf 579:
1.119 paf 580: if(c=='^' && PC.ls!=LS_COMMENT && PC.ls!=LS_DEF_COMMENT)
1.114 paf 581: switch(*PC.source) {
582: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
1.48 paf 583: case '^': case '$': case ';':
584: case '[': case ']':
585: case '{': case '}':
1.114 paf 586: case '"':
1.40 paf 587: if(end!=begin) {
588: // append piece till ^
1.121 paf 589: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line);
1.40 paf 590: }
1.63 paf 591: // reset piece 'begin' position & line
1.114 paf 592: begin=PC.source; // ^
593: begin_line=PC.line;
1.40 paf 594: // skip over ^ and _
1.114 paf 595: PC.source++; PC.col++;
1.40 paf 596: // skip analysis = forced literal
1.1 paf 597: continue;
1.114 paf 598:
599: // converting ^#HH into char(hex(HH))
600: case '#':
601: if(end!=begin) {
602: // append piece till ^
1.121 paf 603: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line);
1.114 paf 604: }
605: // #HH ?
606: if(PC.source[0]=='#' && PC.source[1] && PC.source[2]) {
607: char *hex=(char *)POOL.malloc(1);
608: hex[0]=
609: hex_value[(unsigned char)PC.source[1]]*0x10+
610: hex_value[(unsigned char)PC.source[2]];
611: if(hex[0]==0) {
612: result=BAD_HEX_LITERAL;
613: goto break2; // wrong hex value[no ^#00 chars allowed]: bail out
614: }
615: // append char(hex(HH))
1.121 paf 616: PC.string->APPEND_CLEAN(hex, 1, PC.file, begin_line);
1.114 paf 617: // skip over ^#HH
618: PC.source+=3;
619: PC.col+=3;
620: // reset piece 'begin' position & line
621: begin=PC.source; // ^
622: begin_line=PC.line;
623: continue;
624: }
625: break;
1.1 paf 626: }
1.113 paf 627: // #comment start skipping
1.114 paf 628: if(c=='#' && PC.col==1) {
1.112 paf 629: if(end!=begin) {
630: // append piece till #
1.121 paf 631: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line);
1.112 paf 632: }
633: // fall into COMMENT lexical state [wait for \n]
634: push_LS(PC, LS_COMMENT);
635: }
1.114 paf 636: switch(PC.ls) {
1.10 paf 637:
638: // USER'S = NOT OURS
1.1 paf 639: case LS_USER:
1.48 paf 640: switch(c) {
641: case '$':
1.10 paf 642: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 643: RC;
644: case '^':
645: push_LS(PC, LS_METHOD_NAME);
646: RC;
647: case '@':
1.114 paf 648: if(PC.col==0+1) {
1.48 paf 649: push_LS(PC, LS_DEF_NAME);
650: RC;
651: }
652: break;
1.112 paf 653: }
654: break;
655:
656: // #COMMENT
657: case LS_COMMENT:
658: if(c=='\n') {
659: // skip comment
1.114 paf 660: begin=PC.source;
661: begin_line=PC.line;
1.112 paf 662:
663: pop_LS(PC);
664: continue;
1.1 paf 665: }
1.48 paf 666: break;
667:
668: // STRING IN EXPRESSION
669: case LS_EXPRESSION_STRING:
670: switch(c) {
671: case '"':
672: pop_LS(PC); //"abc".
673: RC;
674: case '$':
675: push_LS(PC, LS_VAR_NAME_SIMPLE);
676: RC;
677: case '^':
1.10 paf 678: push_LS(PC, LS_METHOD_NAME);
1.48 paf 679: RC;
1.10 paf 680: }
681: break;
682:
683: // METHOD DEFINITION
684: case LS_DEF_NAME:
1.48 paf 685: switch(c) {
686: case '[':
1.114 paf 687: PC.ls=LS_DEF_PARAMS;
1.48 paf 688: RC;
689: case '\n':
1.114 paf 690: PC.ls=LS_DEF_SPECIAL_BODY;
1.48 paf 691: RC;
1.10 paf 692: }
693: break;
1.48 paf 694:
1.10 paf 695: case LS_DEF_PARAMS:
1.48 paf 696: switch(c) {
697: case ';':
698: RC;
699: case ']':
1.114 paf 700: PC.ls=*PC.source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 701: RC;
1.49 paf 702: case '\n': // wrong. bailing out
1.10 paf 703: pop_LS(PC);
1.48 paf 704: RC;
1.10 paf 705: }
706: break;
1.48 paf 707:
1.10 paf 708: case LS_DEF_LOCALS:
1.48 paf 709: switch(c) {
710: case '[':
711: case ';':
712: RC;
713: case ']':
1.114 paf 714: PC.ls=LS_DEF_COMMENT;
1.48 paf 715: RC;
716: case '\n': // wrong. bailing out
1.10 paf 717: pop_LS(PC);
1.48 paf 718: RC;
1.10 paf 719: }
720: break;
1.48 paf 721:
1.10 paf 722: case LS_DEF_COMMENT:
723: if(c=='\n') {
724: pop_LS(PC);
1.48 paf 725: RC;
1.37 paf 726: }
727: break;
728:
1.48 paf 729: case LS_DEF_SPECIAL_BODY:
1.37 paf 730: if(c=='\n') {
1.114 paf 731: switch(*PC.source) {
1.48 paf 732: case '@': case 0: // end of special_code
1.37 paf 733: pop_LS(PC);
1.48 paf 734: break;
735: }
736: RC;
737: }
738: break;
739:
740: // (EXPRESSION)
1.69 paf 741: case LS_VAR_ROUND:
742: case LS_METHOD_ROUND:
1.48 paf 743: switch(c) {
744: case ')':
745: if(--lexical_brackets_nestage==0)
1.114 paf 746: if(PC.ls==LS_METHOD_ROUND) // method round param ended
747: PC.ls=LS_METHOD_AFTER; // look for method end
748: else // PC.ls==LS_VAR_ROUND // variable constructor ended
1.69 paf 749: pop_LS(PC); // return to normal life
1.48 paf 750: RC;
751: case '$':
1.69 paf 752: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 753: RC;
754: case '^':
755: push_LS(PC, LS_METHOD_NAME);
756: RC;
757: case '(':
758: lexical_brackets_nestage++;
759: RC;
1.67 paf 760: case '-':
1.114 paf 761: if(*PC.source=='f') { // -f
1.67 paf 762: skip_analized=1;
763: result=FEXISTS;
764: } else
765: result=c;
766: goto break2;
767: case '+': case '*': case '/': case '%':
1.58 paf 768: case '~':
1.48 paf 769: case ';':
770: RC;
1.59 paf 771: case '&': case '|': case '#':
1.114 paf 772: if(*PC.source==c) { // && ||
1.59 paf 773: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 774: skip_analized=1;
1.58 paf 775: } else
776: result=c;
777: goto break2;
778: case '<': case '>': case '=': case '!':
1.114 paf 779: if(*PC.source=='=') { // <= >= == !=
1.67 paf 780: skip_analized=1;
1.58 paf 781: switch(c) {
782: case '<': result=NLE; break;
783: case '>': result=NGE; break;
784: case '=': result=NEQ; break;
785: case '!': result=NNE; break;
786: }
787: } else
788: result=c;
789: goto break2;
1.48 paf 790: case '"':
791: push_LS(PC, LS_EXPRESSION_STRING);
792: RC;
1.50 paf 793: case 'l': case 'g': case 'e': case 'n':
1.51 paf 794: if(end==begin) // right after whitespace
1.117 paf 795: if(isspace(PC.source[1])) {
796: switch(*PC.source) {
797: // case '?': // ok [and bad cases, yacc would bark at them]
798: case 't': // lt gt [et nt]
799: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
800: skip_analized=1;
801: goto break2;
802: case 'e': // le ge ne [ee]
803: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
804: skip_analized=1;
805: goto break2;
806: case 'q': // eq [lq gq nq]
807: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
808: skip_analized=1;
809: goto break2;
810: }
1.67 paf 811: }
812: break;
813: case 'i':
814: if(end==begin) // right after whitespace
1.117 paf 815: if(isspace(PC.source[1])) {
816: switch(PC.source[0]) {
817: case 'n': // in
1.95 paf 818: skip_analized=1;
819: result=IN;
820: goto break2;
1.117 paf 821: case 's': // is
1.95 paf 822: skip_analized=1;
823: result=IS;
824: goto break2;
825: }
1.67 paf 826: }
827: break;
828: case 'd':
829: if(end==begin) // right after whitespace
1.114 paf 830: if(PC.source[0]=='e' && PC.source[1]=='f') { // def
1.67 paf 831: skip_analized=2;
832: result=DEF;
1.58 paf 833: goto break2;
1.50 paf 834: }
1.48 paf 835: break;
836: case ' ': case '\t': case '\n':
1.63 paf 837: if(end!=begin) { // there were a string after previous operator?
838: result=0; // return that string
839: goto break2;
1.48 paf 840: }
1.63 paf 841: // that's a leading|traling space or after-operator-space
842: // ignoring it
843: // reset piece 'begin' position & line
1.114 paf 844: begin=PC.source; // after whitespace char
845: begin_line=PC.line;
1.48 paf 846: continue;
1.1 paf 847: }
848: break;
849:
1.10 paf 850: // VARIABLE GET/PUT/WITH
1.1 paf 851: case LS_VAR_NAME_SIMPLE:
1.69 paf 852: case LS_EXPRESSION_VAR_NAME:
1.114 paf 853: if(PC.ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 854: // name in expr ends also before binary operators
1.48 paf 855: switch(c) {
1.92 paf 856: case '-':
1.48 paf 857: pop_LS(PC);
1.114 paf 858: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.48 paf 859: result=EON;
860: goto break2;
861: }
862: }
863: switch(c) {
864: case 0:
865: case ' ': case '\t': case '\n':
866: case ';':
1.64 paf 867: case ']': case '}': case ')': case '"':
1.83 paf 868: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 869: case '+': case '*': case '/': case '%':
870: case '&': case '|':
871: case '=': case '!':
1.99 paf 872: // common delimiters
1.101 paf 873: case '\'': case ',':
1.1 paf 874: pop_LS(PC);
1.114 paf 875: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.13 paf 876: result=EON;
1.1 paf 877: goto break2;
1.48 paf 878: case '[':
1.114 paf 879: PC.ls=LS_VAR_SQUARE;
1.1 paf 880: lexical_brackets_nestage=1;
1.48 paf 881: RC;
882: case '{':
883: if(begin==end) { // ${name}, no need of EON, switching LS
1.114 paf 884: PC.ls=LS_VAR_NAME_CURLY;
1.48 paf 885: } else {
1.114 paf 886: PC.ls=LS_VAR_CURLY;
1.48 paf 887: lexical_brackets_nestage=1;
888: }
1.69 paf 889:
1.48 paf 890: RC;
891: case '(':
1.114 paf 892: PC.ls=LS_VAR_ROUND;
1.1 paf 893: lexical_brackets_nestage=1;
1.48 paf 894: RC;
895: case '.': // name part delim
896: case '$': // name part subvar
897: case ':': // ':name' or 'class:name'
898: RC;
1.1 paf 899: }
900: break;
1.48 paf 901:
1.1 paf 902: case LS_VAR_NAME_CURLY:
1.48 paf 903: switch(c) {
904: case '}': // ${name} finished, restoring LS
1.1 paf 905: pop_LS(PC);
1.48 paf 906: RC;
907: case '.': // name part delim
908: case '$': // name part subvar
909: case ':': // ':name' or 'class:name'
910: RC;
1.1 paf 911: }
912: break;
1.48 paf 913:
914: case LS_VAR_SQUARE:
915: switch(c) {
916: case '$':
1.10 paf 917: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 918: RC;
919: case '^':
1.10 paf 920: push_LS(PC, LS_METHOD_NAME);
1.48 paf 921: RC;
922: case ']':
1.1 paf 923: if(--lexical_brackets_nestage==0) {
924: pop_LS(PC);
1.48 paf 925: RC;
1.1 paf 926: }
1.48 paf 927: break;
928: case ';': // operator_or_fmt;value delim
929: RC;
930: case '[':
931: lexical_brackets_nestage++;
932: break;
1.1 paf 933: }
934: break;
1.48 paf 935:
1.1 paf 936: case LS_VAR_CURLY:
1.48 paf 937: switch(c) {
938: case '$':
1.10 paf 939: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 940: RC;
941: case '^':
1.10 paf 942: push_LS(PC, LS_METHOD_NAME);
1.48 paf 943: RC;
944: case '}':
1.1 paf 945: if(--lexical_brackets_nestage==0) {
946: pop_LS(PC);
1.48 paf 947: RC;
1.1 paf 948: }
1.48 paf 949: break;
950: case '{':
1.1 paf 951: lexical_brackets_nestage++;
1.48 paf 952: break;
953: }
1.1 paf 954: break;
955:
1.10 paf 956: // METHOD CALL
1.1 paf 957: case LS_METHOD_NAME:
1.48 paf 958: switch(c) {
959: case '[':
1.114 paf 960: PC.ls=LS_METHOD_SQUARE;
1.1 paf 961: lexical_brackets_nestage=1;
1.48 paf 962: RC;
963: case '{':
1.114 paf 964: PC.ls=LS_METHOD_CURLY;
1.1 paf 965: lexical_brackets_nestage=1;
1.48 paf 966: RC;
1.69 paf 967: case '(':
1.114 paf 968: PC.ls=LS_METHOD_ROUND;
1.69 paf 969: lexical_brackets_nestage=1;
970: RC;
1.48 paf 971: case '.': // name part delim
972: case '$': // name part subvar
973: case ':': // ':name' or 'class:name'
974: RC;
1.1 paf 975: }
976: break;
1.48 paf 977:
978: case LS_METHOD_SQUARE:
979: switch(c) {
980: case '$':
1.10 paf 981: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 982: RC;
983: case '^':
1.10 paf 984: push_LS(PC, LS_METHOD_NAME);
1.48 paf 985: RC;
986: case ';': // param delim
987: RC;
988: case ']':
1.1 paf 989: if(--lexical_brackets_nestage==0) {
1.114 paf 990: PC.ls=LS_METHOD_AFTER;
1.48 paf 991: RC;
1.1 paf 992: }
1.48 paf 993: break;
994: case '[':
1.1 paf 995: lexical_brackets_nestage++;
1.48 paf 996: break;
997: }
1.1 paf 998: break;
1.48 paf 999:
1.1 paf 1000: case LS_METHOD_CURLY:
1.48 paf 1001: switch(c) {
1002: case '$':
1.10 paf 1003: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 1004: RC;
1005: case '^':
1.10 paf 1006: push_LS(PC, LS_METHOD_NAME);
1.94 paf 1007: RC;
1008: case ';': // param delim
1.48 paf 1009: RC;
1010: case '}':
1.1 paf 1011: if(--lexical_brackets_nestage==0) {
1.114 paf 1012: PC.ls=LS_METHOD_AFTER;
1.48 paf 1013: RC;
1.1 paf 1014: }
1.48 paf 1015: break;
1016: case '{':
1.1 paf 1017: lexical_brackets_nestage++;
1.48 paf 1018: break;
1019: }
1.1 paf 1020: break;
1.48 paf 1021:
1.1 paf 1022: case LS_METHOD_AFTER:
1.69 paf 1023: if(c=='[') {/* ][ }[ )[ */
1.114 paf 1024: PC.ls=LS_METHOD_SQUARE;
1.1 paf 1025: lexical_brackets_nestage=1;
1.48 paf 1026: RC;
1.1 paf 1027: }
1.69 paf 1028: if(c=='{') {/* ]{ }{ ){ */
1.114 paf 1029: PC.ls=LS_METHOD_CURLY;
1.69 paf 1030: lexical_brackets_nestage=1;
1031: RC;
1032: }
1033: if(c=='(') {/* ]( }( )( */
1.114 paf 1034: PC.ls=LS_METHOD_ROUND;
1.1 paf 1035: lexical_brackets_nestage=1;
1.48 paf 1036: RC;
1.1 paf 1037: }
1038: pop_LS(PC);
1.114 paf 1039: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.13 paf 1040: result=EON;
1.1 paf 1041: goto break2;
1042: }
1.9 paf 1043: if(c==0) {
1.1 paf 1044: result=-1;
1045: break;
1046: }
1047: }
1048:
1049: break2:
1.59 paf 1050: if(end!=begin) { // there is last piece?
1051: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
1052: // strip last \n
1.10 paf 1053: end--;
1.59 paf 1054: }
1055: if(end!=begin) { // last piece still alive?
1056: // append it
1.121 paf 1057: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line/*, start_col*/);
1.30 paf 1058: }
1.59 paf 1059: }
1.114 paf 1060: if(PC.string->size()) { // something accumulated?
1.17 paf 1061: // create STRING value: array of OP_VALUE+vstring
1.114 paf 1062: *lvalp=VL(NEW VString(*PC.string));
1.10 paf 1063: // new pieces storage
1.114 paf 1064: PC.string=NEW String(POOL);
1.58 paf 1065: // make current result be pending for next call, return STRING for now
1.114 paf 1066: PC.pending_state=result; result=STRING;
1.58 paf 1067: }
1.67 paf 1068: if(skip_analized) {
1.114 paf 1069: PC.source+=skip_analized; PC.col+=skip_analized;
1.1 paf 1070: }
1.58 paf 1071: return result;
1.1 paf 1072: }
1073:
1.110 paf 1074: static int real_yyerror(parse_control *pc, char *s) { // Called by yyparse on error
1.114 paf 1075: strncpy(PC.error, s, MAX_STRING);
1.1 paf 1076: return 1;
1.110 paf 1077: }
1.1 paf 1078:
1.110 paf 1079: static void yyprint(FILE *file, int type, YYSTYPE value) {
1080: if(type==STRING)
1.120 paf 1081: fprintf(file, " \"%s\"", LA2S(value)->cstr());
1.110 paf 1082: }
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