Annotation of parser3/src/main/compile.y, revision 1.121
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:
1.121 ! paf 8: $Id: compile.y,v 1.120 2001/03/29 09:31:43 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:
1.9 paf 47: int real_yyerror(parse_control *pc, char *s);
48: static void yyprint(FILE *file, int type, YYSTYPE value);
1.1 paf 49: int yylex(YYSTYPE *lvalp, void *pc);
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,
1.81 paf 116: 0, 0, /*min, max numbered_params_count*/
1.75 paf 117: 0/*param_names*/, 0/*local_names*/,
118: $1/*parser_code*/, 0/*native_code*/);
1.114 paf 119: PC.cclass->add_method(*main_method_name, method);
1.10 paf 120: }
121: | methods;
122:
123: methods: method | methods method;
124: one_big_piece: maybe_codes;
125:
1.34 paf 126: method: control_method | code_method;
127:
128: control_method: '@' STRING '\n'
129: control_strings {
1.120 paf 130: const String& command=*LA2S($2);
1.34 paf 131: YYSTYPE strings_code=$4;
1.37 paf 132: if(strings_code->size()<1*2) {
1.114 paf 133: strcpy(PC.error, "@");
134: strcat(PC.error, command.cstr());
135: strcat(PC.error, " is empty");
1.37 paf 136: YYERROR;
137: }
1.74 paf 138: if(command==CLASS_NAME) {
1.114 paf 139: if(PC.cclass!=&PC.request->ROOT) { // already changed from default?
140: strcpy(PC.error, "class already have a name '");
141: strncat(PC.error, PC.cclass->name().cstr(), 100);
142: strcat(PC.error, "'");
1.73 paf 143: YYERROR;
144: }
145: if(strings_code->size()==1*2) {
146: // new class' name
1.120 paf 147: const String *name=LA2S(strings_code);
1.73 paf 148: // creating the class
1.114 paf 149: PC.cclass=NEW VClass(POOL);
150: PC.cclass->set_name(*name);
1.73 paf 151: // defaulting base. may change with @BASE
1.114 paf 152: PC.cclass->set_base(PC.request->ROOT);
1.73 paf 153: // append to request's classes
1.114 paf 154: PC.request->classes().put(*name, PC.cclass);
1.73 paf 155: } else {
1.114 paf 156: strcpy(PC.error, "@"CLASS_NAME" must contain sole name");
1.34 paf 157: YYERROR;
158: }
159: } else {
1.85 paf 160: if(command==USE_CONTROL_METHOD_NAME) {
1.109 paf 161: for(int i=0; i<strings_code->size(); i+=2)
1.114 paf 162: PC.request->use_file(
1.120 paf 163: PC.request->absolute(*LA2S(strings_code, i)));
1.74 paf 164: } else if(command==BASE_NAME) {
1.114 paf 165: if(PC.cclass->base()!=&PC.request->ROOT) { // already changed from default?
166: strcpy(PC.error, "class already have a base '");
167: strncat(PC.error, PC.cclass->base()->name().cstr(), 100);
168: strcat(PC.error, "'");
1.73 paf 169: YYERROR;
170: }
1.45 paf 171: if(strings_code->size()==1*2) {
1.120 paf 172: const String& base_name=*LA2S(strings_code);
1.45 paf 173: VClass *base=static_cast<VClass *>(
1.114 paf 174: PC.request->classes().get(base_name));
1.45 paf 175: if(!base) {
1.114 paf 176: strcpy(PC.error, base_name.cstr());
177: strcat(PC.error, ": undefined class in @"BASE_NAME);
1.109 paf 178: YYERROR;
179: }
180: // @CLASS == @BASE sanity check
1.114 paf 181: if(PC.cclass==base) {
182: strcpy(PC.error, "@"CLASS_NAME" equals @"BASE_NAME);
1.34 paf 183: YYERROR;
184: }
1.114 paf 185: PC.cclass->set_base(*base);
1.45 paf 186: } else {
1.114 paf 187: strcpy(PC.error, "@"BASE_NAME" must contain sole name");
1.45 paf 188: YYERROR;
1.34 paf 189: }
190: } else {
1.114 paf 191: strcpy(PC.error, "'");
192: strncat(PC.error, command.cstr(), MAX_STRING/2);
193: strcat(PC.error, "' invalid special name. valid names are "
1.92 paf 194: "'"CLASS_NAME"', '"USE_CONTROL_METHOD_NAME"' and '"BASE_NAME"'");
1.34 paf 195: YYERROR;
196: }
197: }
198: };
1.37 paf 199: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
200: control_string: maybe_string '\n';
201: maybe_string: empty | STRING;
1.34 paf 202:
203: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 204: maybe_codes {
1.120 paf 205: const String *name=LA2S($2);
1.10 paf 206:
207: YYSTYPE params_names_code=$3;
1.75 paf 208: Array *params_names=0;
209: if(int size=params_names_code->size()) {
210: params_names=NEW Array(POOL);
211: for(int i=0; i<size; i+=2)
1.120 paf 212: *params_names+=LA2S(params_names_code, i);
1.75 paf 213: }
1.10 paf 214:
215: YYSTYPE locals_names_code=$4;
1.75 paf 216: Array *locals_names=0;
217: if(int size=locals_names_code->size()) {
218: locals_names=NEW Array(POOL);
219: for(int i=0; i<size; i+=2)
1.120 paf 220: *locals_names+=LA2S(locals_names_code, i);
1.75 paf 221: }
1.10 paf 222:
1.76 paf 223: Method& method=*NEW Method(POOL,
224: *name,
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($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 348: P($$, $3); /* filling method_frame.store_params */
1.66 paf 349: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 350: };
351:
1.43 paf 352: call_name: name_without_curly_rdive;
1.38 paf 353:
1.9 paf 354: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 355: store_param:
356: store_square_param
357: | store_round_param
358: | store_curly_param
1.31 paf 359: ;
1.120 paf 360: store_square_param: '[' store_code_param_parts ']' {
361: YYSTYPE params_code=$2;
362: if(params_code->size()==3) // probably [] case. [OP_VALUE + Unknown + STORE_PARAM]
363: if(!LA2V(params_code)->is_defined()) { // value is VUnknown?
364: $$=N(POOL); // ^zzz[] case. don't append lone empty param.
365: break;
366: }
367:
368: $$=params_code;
369: };
1.69 paf 370: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.94 paf 371: store_curly_param: '{' store_curly_param_parts '}' {$$=$2};
1.69 paf 372: store_code_param_parts:
373: store_code_param_part
374: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
375: ;
376: store_expr_param_parts:
377: store_expr_param_part
378: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
379: ;
1.94 paf 380: store_curly_param_parts:
381: store_curly_param_part
382: | store_curly_param_parts ';' store_curly_param_part { $$=$1; P($$, $3) }
383: ;
1.120 paf 384: store_code_param_part: code_param_value {
1.32 paf 385: $$=$1;
1.54 paf 386: O($$, OP_STORE_PARAM);
1.120 paf 387: };
1.69 paf 388: store_expr_param_part: write_expr_value {
389: $$=N(POOL);
1.103 paf 390: PEA($$, $1);
1.69 paf 391: };
1.94 paf 392: store_curly_param_part: maybe_codes {
393: $$=N(POOL);
394: PCA($$, $1);
395: };
1.120 paf 396: code_param_value:
397: unknown_value /* optimized [;...] case */
398: | STRING /* optimized [STRING] case */
399: | constructor_code_value /* [something complex] */
400: ;
1.90 paf 401: write_expr_value: expr_value {
1.69 paf 402: $$=$1;
1.102 paf 403: O($$, OP_WRITE_EXPR_RESULT);
1.69 paf 404: };
1.1 paf 405:
406: /* name */
407:
1.20 paf 408: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 409:
1.9 paf 410: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 411: name_step: name_advance1 '.';
412: name_advance1: name_expr_value {
413: /* stack: context */
414: $$=$1; /* stack: context,name */
1.54 paf 415: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 416: };
417: name_advance2: name_expr_value {
418: /* stack: context */
419: $$=$1; /* stack: context,name */
1.54 paf 420: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 421: }
1.4 paf 422: | STRING BOGUS
1.1 paf 423: ;
424: name_expr_value:
1.4 paf 425: STRING /* subname_is_const */
1.1 paf 426: | name_expr_subvar_value /* $subname_is_var_value */
427: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
428: ;
429: name_expr_subvar_value: '$' subvar_ref_name_rdive {
430: $$=$2;
1.54 paf 431: O($$, OP_GET_ELEMENT);
1.1 paf 432: };
1.4 paf 433: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 434: $$=N(POOL);
1.54 paf 435: O($$, OP_CREATE_EWPOOL);
1.9 paf 436: P($$, $1);
1.102 paf 437: O($$, OP_WRITE_VALUE);
1.9 paf 438: P($$, $2);
1.54 paf 439: O($$, OP_REDUCE_EWPOOL);
1.1 paf 440: };
1.18 paf 441: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
442: subvar_ref_name_rdive_read: STRING {
1.25 paf 443: $$=N(POOL);
1.54 paf 444: O($$, OP_WITH_READ);
1.9 paf 445: P($$, $1);
1.1 paf 446: };
1.18 paf 447: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 448: $$=N(POOL);
1.54 paf 449: O($$, OP_WITH_ROOT);
1.18 paf 450: P($$, $2);
451: };
1.9 paf 452: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 453: subvar__get_write: '$' subvar_ref_name_rdive {
454: $$=$2;
1.54 paf 455: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 456: };
457:
1.44 paf 458: class_prefix: STRING ':' {
1.72 paf 459: $$=$1; // stack: class name string
460: O($$, OP_GET_CLASS);
1.1 paf 461: };
462:
463:
464: /* with */
465:
466: with: '$' name_without_curly_rdive '{' codes '}' {
467: $$=$2;
1.54 paf 468: O($$, OP_CREATE_RWPOOL);
1.9 paf 469: P($$, $4);
1.54 paf 470: O($$, OP_REDUCE_RWPOOL);
1.102 paf 471: O($$, OP_WRITE_VALUE);
1.1 paf 472: };
1.53 paf 473:
1.56 paf 474: /* expr */
1.53 paf 475:
1.81 paf 476: expr_value: expr {
477: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 478: change_string_literal_to_double_literal($$); // make that string literal Double
479: };
1.56 paf 480: expr:
1.62 paf 481: STRING
1.64 paf 482: | get_value
1.66 paf 483: | call_value
1.64 paf 484: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 485: | '(' expr ')' { $$ = $2; }
486: /* stack: operand // stack: @operand */
487: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 488: | '~' expr { $$=$2; O($$, OP_INV) }
489: | '!' expr { $$=$2; O($$, OP_NOT) }
490: | "def" expr { $$=$2; O($$, OP_DEF) }
491: | "in" expr { $$=$2; O($$, OP_IN) }
492: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 493: /* stack: a,b // stack: a@b */
494: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
495: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
496: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
497: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
498: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
499: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
500: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
501: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
502: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
503: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
504: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
505: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
506: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
507: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
508: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
509: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
510: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 511: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
512: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
513: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
514: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
515: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
516: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.95 paf 517: | expr "is" expr { $$=$1; P($$, $3); O($$, OP_IS) }
1.56 paf 518: ;
1.55 paf 519:
1.65 paf 520: string_inside_quotes_value: maybe_codes {
1.64 paf 521: $$=N(POOL);
522: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 523: P($$, $1); /* some code that writes to that context */
1.64 paf 524: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 525: };
1.1 paf 526:
1.27 paf 527: /* basics */
1.1 paf 528:
1.81 paf 529: write_string: STRING {
1.102 paf 530: // optimized from OP_STRING+OP_WRITE_VALUE to OP_STRING__WRITE
1.84 paf 531: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 532: };
533:
1.120 paf 534: unknown_value: /* empty */ { $$=VL(NEW VUnknown(POOL)) };
1.25 paf 535: empty: /* empty */ { $$=N(POOL) };
1.1 paf 536:
537: %%
1.105 paf 538: #endif
1.1 paf 539:
540: /*
541: 000$111(2222)00
542: 000$111{3333}00
1.9 paf 543: $,^: push,=0
1.1 paf 544: 1:( { break=pop
545: 2:( ) pop
546: 3:{ } pop
547:
548: 000^111(2222)4444{33333}4000
1.9 paf 549: $,^: push,=0
1.1 paf 550: 1:( { break=pop
551: 2:( )=4
552: 3:{ }=4
553: 4:[^({]=pop
554: */
555:
1.110 paf 556: static int yylex(YYSTYPE *lvalp, void *pc) {
1.114 paf 557: #define lexical_brackets_nestage PC.brackets_nestages[PC.sp]
1.48 paf 558: #define RC {result=c; goto break2; }
1.1 paf 559:
560: register int c;
561: int result;
562:
1.114 paf 563: if(PC.pending_state) {
564: result=PC.pending_state;
565: PC.pending_state=0;
1.1 paf 566: return result;
567: }
568:
1.114 paf 569: const char *begin=PC.source;
1.91 paf 570: const char *end;
1.114 paf 571: int begin_line=PC.line;
1.67 paf 572: int skip_analized=0;
1.50 paf 573: while(true) {
1.114 paf 574: c=*(end=(PC.source++));
1.1 paf 575:
1.4 paf 576: if(c=='\n') {
1.114 paf 577: PC.line++;
578: PC.col=0;
1.10 paf 579: } else
1.114 paf 580: PC.col++;
1.73 paf 581:
1.119 paf 582: if(c=='^' && PC.ls!=LS_COMMENT && PC.ls!=LS_DEF_COMMENT)
1.114 paf 583: switch(*PC.source) {
584: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
1.48 paf 585: case '^': case '$': case ';':
586: case '[': case ']':
587: case '{': case '}':
1.114 paf 588: case '"':
1.40 paf 589: if(end!=begin) {
590: // append piece till ^
1.121 ! paf 591: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line);
1.40 paf 592: }
1.63 paf 593: // reset piece 'begin' position & line
1.114 paf 594: begin=PC.source; // ^
595: begin_line=PC.line;
1.40 paf 596: // skip over ^ and _
1.114 paf 597: PC.source++; PC.col++;
1.40 paf 598: // skip analysis = forced literal
1.1 paf 599: continue;
1.114 paf 600:
601: // converting ^#HH into char(hex(HH))
602: case '#':
603: if(end!=begin) {
604: // append piece till ^
1.121 ! paf 605: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line);
1.114 paf 606: }
607: // #HH ?
608: if(PC.source[0]=='#' && PC.source[1] && PC.source[2]) {
609: char *hex=(char *)POOL.malloc(1);
610: hex[0]=
611: hex_value[(unsigned char)PC.source[1]]*0x10+
612: hex_value[(unsigned char)PC.source[2]];
613: if(hex[0]==0) {
614: result=BAD_HEX_LITERAL;
615: goto break2; // wrong hex value[no ^#00 chars allowed]: bail out
616: }
617: // append char(hex(HH))
1.121 ! paf 618: PC.string->APPEND_CLEAN(hex, 1, PC.file, begin_line);
1.114 paf 619: // skip over ^#HH
620: PC.source+=3;
621: PC.col+=3;
622: // reset piece 'begin' position & line
623: begin=PC.source; // ^
624: begin_line=PC.line;
625: continue;
626: }
627: break;
1.1 paf 628: }
1.113 paf 629: // #comment start skipping
1.114 paf 630: if(c=='#' && PC.col==1) {
1.112 paf 631: if(end!=begin) {
632: // append piece till #
1.121 ! paf 633: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line);
1.112 paf 634: }
635: // fall into COMMENT lexical state [wait for \n]
636: push_LS(PC, LS_COMMENT);
637: }
1.114 paf 638: switch(PC.ls) {
1.10 paf 639:
640: // USER'S = NOT OURS
1.1 paf 641: case LS_USER:
1.48 paf 642: switch(c) {
643: case '$':
1.10 paf 644: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 645: RC;
646: case '^':
647: push_LS(PC, LS_METHOD_NAME);
648: RC;
649: case '@':
1.114 paf 650: if(PC.col==0+1) {
1.48 paf 651: push_LS(PC, LS_DEF_NAME);
652: RC;
653: }
654: break;
1.112 paf 655: }
656: break;
657:
658: // #COMMENT
659: case LS_COMMENT:
660: if(c=='\n') {
661: // skip comment
1.114 paf 662: begin=PC.source;
663: begin_line=PC.line;
1.112 paf 664:
665: pop_LS(PC);
666: continue;
1.1 paf 667: }
1.48 paf 668: break;
669:
670: // STRING IN EXPRESSION
671: case LS_EXPRESSION_STRING:
672: switch(c) {
673: case '"':
674: pop_LS(PC); //"abc".
675: RC;
676: case '$':
677: push_LS(PC, LS_VAR_NAME_SIMPLE);
678: RC;
679: case '^':
1.10 paf 680: push_LS(PC, LS_METHOD_NAME);
1.48 paf 681: RC;
1.10 paf 682: }
683: break;
684:
685: // METHOD DEFINITION
686: case LS_DEF_NAME:
1.48 paf 687: switch(c) {
688: case '[':
1.114 paf 689: PC.ls=LS_DEF_PARAMS;
1.48 paf 690: RC;
691: case '\n':
1.114 paf 692: PC.ls=LS_DEF_SPECIAL_BODY;
1.48 paf 693: RC;
1.10 paf 694: }
695: break;
1.48 paf 696:
1.10 paf 697: case LS_DEF_PARAMS:
1.48 paf 698: switch(c) {
699: case ';':
700: RC;
701: case ']':
1.114 paf 702: PC.ls=*PC.source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 703: RC;
1.49 paf 704: case '\n': // wrong. bailing out
1.10 paf 705: pop_LS(PC);
1.48 paf 706: RC;
1.10 paf 707: }
708: break;
1.48 paf 709:
1.10 paf 710: case LS_DEF_LOCALS:
1.48 paf 711: switch(c) {
712: case '[':
713: case ';':
714: RC;
715: case ']':
1.114 paf 716: PC.ls=LS_DEF_COMMENT;
1.48 paf 717: RC;
718: case '\n': // wrong. bailing out
1.10 paf 719: pop_LS(PC);
1.48 paf 720: RC;
1.10 paf 721: }
722: break;
1.48 paf 723:
1.10 paf 724: case LS_DEF_COMMENT:
725: if(c=='\n') {
726: pop_LS(PC);
1.48 paf 727: RC;
1.37 paf 728: }
729: break;
730:
1.48 paf 731: case LS_DEF_SPECIAL_BODY:
1.37 paf 732: if(c=='\n') {
1.114 paf 733: switch(*PC.source) {
1.48 paf 734: case '@': case 0: // end of special_code
1.37 paf 735: pop_LS(PC);
1.48 paf 736: break;
737: }
738: RC;
739: }
740: break;
741:
742: // (EXPRESSION)
1.69 paf 743: case LS_VAR_ROUND:
744: case LS_METHOD_ROUND:
1.48 paf 745: switch(c) {
746: case ')':
747: if(--lexical_brackets_nestage==0)
1.114 paf 748: if(PC.ls==LS_METHOD_ROUND) // method round param ended
749: PC.ls=LS_METHOD_AFTER; // look for method end
750: else // PC.ls==LS_VAR_ROUND // variable constructor ended
1.69 paf 751: pop_LS(PC); // return to normal life
1.48 paf 752: RC;
753: case '$':
1.69 paf 754: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 755: RC;
756: case '^':
757: push_LS(PC, LS_METHOD_NAME);
758: RC;
759: case '(':
760: lexical_brackets_nestage++;
761: RC;
1.67 paf 762: case '-':
1.114 paf 763: if(*PC.source=='f') { // -f
1.67 paf 764: skip_analized=1;
765: result=FEXISTS;
766: } else
767: result=c;
768: goto break2;
769: case '+': case '*': case '/': case '%':
1.58 paf 770: case '~':
1.48 paf 771: case ';':
772: RC;
1.59 paf 773: case '&': case '|': case '#':
1.114 paf 774: if(*PC.source==c) { // && ||
1.59 paf 775: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 776: skip_analized=1;
1.58 paf 777: } else
778: result=c;
779: goto break2;
780: case '<': case '>': case '=': case '!':
1.114 paf 781: if(*PC.source=='=') { // <= >= == !=
1.67 paf 782: skip_analized=1;
1.58 paf 783: switch(c) {
784: case '<': result=NLE; break;
785: case '>': result=NGE; break;
786: case '=': result=NEQ; break;
787: case '!': result=NNE; break;
788: }
789: } else
790: result=c;
791: goto break2;
1.48 paf 792: case '"':
793: push_LS(PC, LS_EXPRESSION_STRING);
794: RC;
1.50 paf 795: case 'l': case 'g': case 'e': case 'n':
1.51 paf 796: if(end==begin) // right after whitespace
1.117 paf 797: if(isspace(PC.source[1])) {
798: switch(*PC.source) {
799: // case '?': // ok [and bad cases, yacc would bark at them]
800: case 't': // lt gt [et nt]
801: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
802: skip_analized=1;
803: goto break2;
804: case 'e': // le ge ne [ee]
805: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
806: skip_analized=1;
807: goto break2;
808: case 'q': // eq [lq gq nq]
809: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
810: skip_analized=1;
811: goto break2;
812: }
1.67 paf 813: }
814: break;
815: case 'i':
816: if(end==begin) // right after whitespace
1.117 paf 817: if(isspace(PC.source[1])) {
818: switch(PC.source[0]) {
819: case 'n': // in
1.95 paf 820: skip_analized=1;
821: result=IN;
822: goto break2;
1.117 paf 823: case 's': // is
1.95 paf 824: skip_analized=1;
825: result=IS;
826: goto break2;
827: }
1.67 paf 828: }
829: break;
830: case 'd':
831: if(end==begin) // right after whitespace
1.114 paf 832: if(PC.source[0]=='e' && PC.source[1]=='f') { // def
1.67 paf 833: skip_analized=2;
834: result=DEF;
1.58 paf 835: goto break2;
1.50 paf 836: }
1.48 paf 837: break;
838: case ' ': case '\t': case '\n':
1.63 paf 839: if(end!=begin) { // there were a string after previous operator?
840: result=0; // return that string
841: goto break2;
1.48 paf 842: }
1.63 paf 843: // that's a leading|traling space or after-operator-space
844: // ignoring it
845: // reset piece 'begin' position & line
1.114 paf 846: begin=PC.source; // after whitespace char
847: begin_line=PC.line;
1.48 paf 848: continue;
1.1 paf 849: }
850: break;
851:
1.10 paf 852: // VARIABLE GET/PUT/WITH
1.1 paf 853: case LS_VAR_NAME_SIMPLE:
1.69 paf 854: case LS_EXPRESSION_VAR_NAME:
1.114 paf 855: if(PC.ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 856: // name in expr ends also before binary operators
1.48 paf 857: switch(c) {
1.92 paf 858: case '-':
1.48 paf 859: pop_LS(PC);
1.114 paf 860: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.48 paf 861: result=EON;
862: goto break2;
863: }
864: }
865: switch(c) {
866: case 0:
867: case ' ': case '\t': case '\n':
868: case ';':
1.64 paf 869: case ']': case '}': case ')': case '"':
1.83 paf 870: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 871: case '+': case '*': case '/': case '%':
872: case '&': case '|':
873: case '=': case '!':
1.99 paf 874: // common delimiters
1.101 paf 875: case '\'': case ',':
1.1 paf 876: pop_LS(PC);
1.114 paf 877: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.13 paf 878: result=EON;
1.1 paf 879: goto break2;
1.48 paf 880: case '[':
1.114 paf 881: PC.ls=LS_VAR_SQUARE;
1.1 paf 882: lexical_brackets_nestage=1;
1.48 paf 883: RC;
884: case '{':
885: if(begin==end) { // ${name}, no need of EON, switching LS
1.114 paf 886: PC.ls=LS_VAR_NAME_CURLY;
1.48 paf 887: } else {
1.114 paf 888: PC.ls=LS_VAR_CURLY;
1.48 paf 889: lexical_brackets_nestage=1;
890: }
1.69 paf 891:
1.48 paf 892: RC;
893: case '(':
1.114 paf 894: PC.ls=LS_VAR_ROUND;
1.1 paf 895: lexical_brackets_nestage=1;
1.48 paf 896: RC;
897: case '.': // name part delim
898: case '$': // name part subvar
899: case ':': // ':name' or 'class:name'
900: RC;
1.1 paf 901: }
902: break;
1.48 paf 903:
1.1 paf 904: case LS_VAR_NAME_CURLY:
1.48 paf 905: switch(c) {
906: case '}': // ${name} finished, restoring LS
1.1 paf 907: pop_LS(PC);
1.48 paf 908: RC;
909: case '.': // name part delim
910: case '$': // name part subvar
911: case ':': // ':name' or 'class:name'
912: RC;
1.1 paf 913: }
914: break;
1.48 paf 915:
916: case LS_VAR_SQUARE:
917: switch(c) {
918: case '$':
1.10 paf 919: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 920: RC;
921: case '^':
1.10 paf 922: push_LS(PC, LS_METHOD_NAME);
1.48 paf 923: RC;
924: case ']':
1.1 paf 925: if(--lexical_brackets_nestage==0) {
926: pop_LS(PC);
1.48 paf 927: RC;
1.1 paf 928: }
1.48 paf 929: break;
930: case ';': // operator_or_fmt;value delim
931: RC;
932: case '[':
933: lexical_brackets_nestage++;
934: break;
1.1 paf 935: }
936: break;
1.48 paf 937:
1.1 paf 938: case LS_VAR_CURLY:
1.48 paf 939: switch(c) {
940: case '$':
1.10 paf 941: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 942: RC;
943: case '^':
1.10 paf 944: push_LS(PC, LS_METHOD_NAME);
1.48 paf 945: RC;
946: case '}':
1.1 paf 947: if(--lexical_brackets_nestage==0) {
948: pop_LS(PC);
1.48 paf 949: RC;
1.1 paf 950: }
1.48 paf 951: break;
952: case '{':
1.1 paf 953: lexical_brackets_nestage++;
1.48 paf 954: break;
955: }
1.1 paf 956: break;
957:
1.10 paf 958: // METHOD CALL
1.1 paf 959: case LS_METHOD_NAME:
1.48 paf 960: switch(c) {
961: case '[':
1.114 paf 962: PC.ls=LS_METHOD_SQUARE;
1.1 paf 963: lexical_brackets_nestage=1;
1.48 paf 964: RC;
965: case '{':
1.114 paf 966: PC.ls=LS_METHOD_CURLY;
1.1 paf 967: lexical_brackets_nestage=1;
1.48 paf 968: RC;
1.69 paf 969: case '(':
1.114 paf 970: PC.ls=LS_METHOD_ROUND;
1.69 paf 971: lexical_brackets_nestage=1;
972: RC;
1.48 paf 973: case '.': // name part delim
974: case '$': // name part subvar
975: case ':': // ':name' or 'class:name'
976: RC;
1.1 paf 977: }
978: break;
1.48 paf 979:
980: case LS_METHOD_SQUARE:
981: switch(c) {
982: case '$':
1.10 paf 983: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 984: RC;
985: case '^':
1.10 paf 986: push_LS(PC, LS_METHOD_NAME);
1.48 paf 987: RC;
988: case ';': // param delim
989: RC;
990: case ']':
1.1 paf 991: if(--lexical_brackets_nestage==0) {
1.114 paf 992: PC.ls=LS_METHOD_AFTER;
1.48 paf 993: RC;
1.1 paf 994: }
1.48 paf 995: break;
996: case '[':
1.1 paf 997: lexical_brackets_nestage++;
1.48 paf 998: break;
999: }
1.1 paf 1000: break;
1.48 paf 1001:
1.1 paf 1002: case LS_METHOD_CURLY:
1.48 paf 1003: switch(c) {
1004: case '$':
1.10 paf 1005: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 1006: RC;
1007: case '^':
1.10 paf 1008: push_LS(PC, LS_METHOD_NAME);
1.94 paf 1009: RC;
1010: case ';': // param delim
1.48 paf 1011: RC;
1012: case '}':
1.1 paf 1013: if(--lexical_brackets_nestage==0) {
1.114 paf 1014: PC.ls=LS_METHOD_AFTER;
1.48 paf 1015: RC;
1.1 paf 1016: }
1.48 paf 1017: break;
1018: case '{':
1.1 paf 1019: lexical_brackets_nestage++;
1.48 paf 1020: break;
1021: }
1.1 paf 1022: break;
1.48 paf 1023:
1.1 paf 1024: case LS_METHOD_AFTER:
1.69 paf 1025: if(c=='[') {/* ][ }[ )[ */
1.114 paf 1026: PC.ls=LS_METHOD_SQUARE;
1.1 paf 1027: lexical_brackets_nestage=1;
1.48 paf 1028: RC;
1.1 paf 1029: }
1.69 paf 1030: if(c=='{') {/* ]{ }{ ){ */
1.114 paf 1031: PC.ls=LS_METHOD_CURLY;
1.69 paf 1032: lexical_brackets_nestage=1;
1033: RC;
1034: }
1035: if(c=='(') {/* ]( }( )( */
1.114 paf 1036: PC.ls=LS_METHOD_ROUND;
1.1 paf 1037: lexical_brackets_nestage=1;
1.48 paf 1038: RC;
1.1 paf 1039: }
1040: pop_LS(PC);
1.114 paf 1041: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.13 paf 1042: result=EON;
1.1 paf 1043: goto break2;
1044: }
1.9 paf 1045: if(c==0) {
1.1 paf 1046: result=-1;
1047: break;
1048: }
1049: }
1050:
1051: break2:
1.59 paf 1052: if(end!=begin) { // there is last piece?
1053: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
1054: // strip last \n
1.10 paf 1055: end--;
1.59 paf 1056: }
1057: if(end!=begin) { // last piece still alive?
1058: // append it
1.121 ! paf 1059: PC.string->APPEND_CLEAN(begin, end-begin, PC.file, begin_line/*, start_col*/);
1.30 paf 1060: }
1.59 paf 1061: }
1.114 paf 1062: if(PC.string->size()) { // something accumulated?
1.17 paf 1063: // create STRING value: array of OP_VALUE+vstring
1.114 paf 1064: *lvalp=VL(NEW VString(*PC.string));
1.10 paf 1065: // new pieces storage
1.114 paf 1066: PC.string=NEW String(POOL);
1.58 paf 1067: // make current result be pending for next call, return STRING for now
1.114 paf 1068: PC.pending_state=result; result=STRING;
1.58 paf 1069: }
1.67 paf 1070: if(skip_analized) {
1.114 paf 1071: PC.source+=skip_analized; PC.col+=skip_analized;
1.1 paf 1072: }
1.58 paf 1073: return result;
1.1 paf 1074: }
1075:
1.110 paf 1076: static int real_yyerror(parse_control *pc, char *s) { // Called by yyparse on error
1.114 paf 1077: strncpy(PC.error, s, MAX_STRING);
1.1 paf 1078: return 1;
1.110 paf 1079: }
1.1 paf 1080:
1.110 paf 1081: static void yyprint(FILE *file, int type, YYSTYPE value) {
1082: if(type==STRING)
1.120 paf 1083: fprintf(file, " \"%s\"", LA2S(value)->cstr());
1.110 paf 1084: }
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