Annotation of parser3/src/main/compile.y, revision 1.109
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:
1.109 ! paf 8: $Id: compile.y,v 1.108 2001/03/23 13:08:10 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>
34:
35: #include "compile_tools.h"
1.8 paf 36: #include "pa_value.h"
1.12 paf 37: #include "pa_request.h"
1.39 paf 38: #include "pa_vobject.h"
1.52 paf 39: #include "pa_vdouble.h"
1.98 paf 40: #include "pa_globals.h"
1.39 paf 41:
1.85 paf 42: #define SELF_ELEMENT_NAME "self"
1.97 paf 43: #define USE_CONTROL_METHOD_NAME "USE"
1.1 paf 44:
1.9 paf 45: int real_yyerror(parse_control *pc, char *s);
46: static void yyprint(FILE *file, int type, YYSTYPE value);
1.1 paf 47: int yylex(YYSTYPE *lvalp, void *pc);
48:
49:
1.8 paf 50: // local convinient inplace typecast & var
1.9 paf 51: #define PC ((parse_control *)pc)
1.25 paf 52: #define POOL *PC->pool
53: #undef NEW
54: #define NEW new(POOL)
1.107 paf 55: #ifndef DOXYGEN
1.1 paf 56: %}
57:
58: %pure_parser
59:
1.13 paf 60: %token EON
1.4 paf 61: %token STRING
1.1 paf 62: %token BOGUS
1.55 paf 63:
1.58 paf 64: %token BAD_STRING_COMPARISON_OPERATOR
65:
1.59 paf 66: %token LAND "&&"
1.58 paf 67: %token LOR "||"
1.59 paf 68: %token LXOR "##"
1.58 paf 69:
70: %token NLE "<="
71: %token NGE ">="
72: %token NEQ "=="
73: %token NNE "!="
74:
75: %token SLT "lt"
76: %token SGT "gt"
77: %token SLE "le"
78: %token SGE "ge"
79: %token SEQ "eq"
80: %token SNE "ne"
81:
1.67 paf 82: %token DEF "def"
83: %token IN "in"
84: %token FEXISTS "-f"
1.95 paf 85: %token IS "is"
1.67 paf 86:
1.57 paf 87: /* logical */
1.95 paf 88: %left "is"
1.61 paf 89: %left "lt" "gt" "le" "ge"
90: %left "eq" "ne"
1.59 paf 91: %left '<' '>' "<=" ">=" "##"
1.57 paf 92: %left "==" "!="
93: %left "||"
94: %left "&&"
1.67 paf 95: %left "def" "in" "-f"
1.68 paf 96: %left '!'
1.57 paf 97:
98: /* bitwise */
1.59 paf 99: %left '#'
1.57 paf 100: %left '&' '|'
1.68 paf 101: %left '~'
1.57 paf 102:
1.56 paf 103: /* numerical */
1.55 paf 104: %left '-' '+'
1.57 paf 105: %left '*' '/' '%'
1.56 paf 106: %left NEG /* negation: unary - */
1.1 paf 107:
108: %%
1.88 paf 109: all:
1.10 paf 110: one_big_piece {
1.75 paf 111: Method& method=*NEW Method(POOL,
1.85 paf 112: *main_method_name,
1.81 paf 113: 0, 0, /*min, max numbered_params_count*/
1.75 paf 114: 0/*param_names*/, 0/*local_names*/,
115: $1/*parser_code*/, 0/*native_code*/);
1.91 paf 116: PC->cclass->add_method(*main_method_name, method);
1.10 paf 117: }
118: | methods;
119:
120: methods: method | methods method;
121: one_big_piece: maybe_codes;
122:
1.34 paf 123: method: control_method | code_method;
124:
125: control_method: '@' STRING '\n'
126: control_strings {
1.82 paf 127: const String& command=*SLA2S($2);
1.34 paf 128: YYSTYPE strings_code=$4;
1.37 paf 129: if(strings_code->size()<1*2) {
130: strcpy(PC->error, "@");
1.74 paf 131: strcat(PC->error, command.cstr());
1.37 paf 132: strcat(PC->error, " is empty");
133: YYERROR;
134: }
1.74 paf 135: if(command==CLASS_NAME) {
1.104 paf 136: if(PC->cclass!=&PC->request->ROOT) { // already changed from default?
1.73 paf 137: strcpy(PC->error, "class already have a name '");
1.91 paf 138: strncat(PC->error, PC->cclass->name().cstr(), 100);
1.73 paf 139: strcat(PC->error, "'");
140: YYERROR;
141: }
142: if(strings_code->size()==1*2) {
143: // new class' name
1.82 paf 144: const String *name=SLA2S(strings_code);
1.73 paf 145: // creating the class
1.91 paf 146: PC->cclass=NEW VClass(POOL);
147: PC->cclass->set_name(*name);
1.73 paf 148: // defaulting base. may change with @BASE
1.104 paf 149: PC->cclass->set_base(PC->request->ROOT);
1.73 paf 150: // append to request's classes
1.91 paf 151: PC->request->classes().put(*name, PC->cclass);
1.73 paf 152: } else {
1.34 paf 153: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
154: YYERROR;
155: }
156: } else {
1.85 paf 157: if(command==USE_CONTROL_METHOD_NAME) {
1.109 ! paf 158: for(int i=0; i<strings_code->size(); i+=2)
! 159: PC->request->use_file(
! 160: PC->request->absolute(SLA2S(strings_code, i)->cstr()));
1.74 paf 161: } else if(command==BASE_NAME) {
1.104 paf 162: if(PC->cclass->base()!=&PC->request->ROOT) { // already changed from default?
1.86 paf 163: strcpy(PC->error, "class already have a base '");
1.91 paf 164: strncat(PC->error, PC->cclass->base()->name().cstr(), 100);
1.86 paf 165: strcat(PC->error, "'");
1.73 paf 166: YYERROR;
167: }
1.45 paf 168: if(strings_code->size()==1*2) {
1.73 paf 169: // TODO: преодолеть self и циклические base
1.82 paf 170: const String& base_name=*SLA2S(strings_code);
1.45 paf 171: VClass *base=static_cast<VClass *>(
172: PC->request->classes().get(base_name));
173: if(!base) {
174: strcpy(PC->error, base_name.cstr());
175: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.109 ! paf 176: YYERROR;
! 177: }
! 178: // @CLASS == @BASE sanity check
! 179: if(PC->cclass==base) {
! 180: strcpy(PC->error, "@"CLASS_NAME" equals @"BASE_NAME);
1.34 paf 181: YYERROR;
182: }
1.91 paf 183: PC->cclass->set_base(*base);
1.45 paf 184: } else {
185: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
186: YYERROR;
1.34 paf 187: }
188: } else {
1.92 paf 189: strcpy(PC->error, "'");
1.93 paf 190: strncat(PC->error, command.cstr(), MAX_STRING/2);
1.92 paf 191: strcat(PC->error, "' invalid special name. valid names are "
192: "'"CLASS_NAME"', '"USE_CONTROL_METHOD_NAME"' and '"BASE_NAME"'");
1.34 paf 193: YYERROR;
194: }
195: }
196: };
1.37 paf 197: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
198: control_string: maybe_string '\n';
199: maybe_string: empty | STRING;
1.34 paf 200:
201: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 202: maybe_codes {
1.38 paf 203: const String *name=SLA2S($2);
1.10 paf 204:
205: YYSTYPE params_names_code=$3;
1.75 paf 206: Array *params_names=0;
207: if(int size=params_names_code->size()) {
208: params_names=NEW Array(POOL);
209: for(int i=0; i<size; i+=2)
210: *params_names+=SLA2S(params_names_code, i);
211: }
1.10 paf 212:
213: YYSTYPE locals_names_code=$4;
1.75 paf 214: Array *locals_names=0;
215: if(int size=locals_names_code->size()) {
216: locals_names=NEW Array(POOL);
217: for(int i=0; i<size; i+=2)
218: *locals_names+=SLA2S(locals_names_code, i);
219: }
1.10 paf 220:
1.76 paf 221: Method& method=*NEW Method(POOL,
222: *name,
1.81 paf 223: 0, 0/*min,max numbered_params_count*/,
1.76 paf 224: params_names, locals_names,
225: $7, 0);
1.91 paf 226: PC->cclass->add_method(*name, method);
1.8 paf 227: };
1.10 paf 228:
229: maybe_bracketed_strings: empty | bracketed_maybe_strings;
230: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
231: maybe_strings: empty | strings;
232: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
233:
234: maybe_comment: empty | STRING;
1.1 paf 235:
236: /* codes */
237:
1.10 paf 238: maybe_codes: empty | codes;
239:
1.90 paf 240: codes: code | codes code { $$=$1; P($$, $2) };
1.81 paf 241: code: write_string | action;
1.1 paf 242: action: get | put | with | call;
243:
244: /* get */
245:
1.64 paf 246: get: get_value {
247: $$=$1; /* stack: resulting value */
1.102 paf 248: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.1 paf 249: };
1.64 paf 250: get_value: '$' get_name_value { $$=$2 }
251: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 252: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 253: name_without_curly_rdive:
254: name_without_curly_rdive_read
255: | name_without_curly_rdive_root
256: | name_without_curly_rdive_class;
1.19 paf 257: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 258: $$=N(POOL);
1.22 paf 259: Array *diving_code=$1;
1.82 paf 260: const String *first_name=SLA2S(diving_code);
1.85 paf 261: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 262: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 263: P($$, diving_code,
264: /* skip over... */
265: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
266: } else {
1.54 paf 267: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 268: P($$, diving_code);
269: }
270: /* diving code; stack: current context */
1.1 paf 271: };
1.19 paf 272: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 273: $$=N(POOL);
1.54 paf 274: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 275: P($$, $2); /* diving code; stack: current context */
276: };
1.44 paf 277: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 278: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 279:
280: /* put */
281:
1.81 paf 282: put: '$' name_expr_wdive construct {
1.20 paf 283: $$=$2; /* stack: context,name */
1.52 paf 284: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 285: };
1.44 paf 286: name_expr_wdive:
287: name_expr_wdive_write
288: | name_expr_wdive_root
289: | name_expr_wdive_class;
1.28 paf 290: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 291: $$=N(POOL);
1.23 paf 292: Array *diving_code=$1;
1.82 paf 293: const String *first_name=SLA2S(diving_code);
1.85 paf 294: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 295: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 296: P($$, diving_code,
297: /* skip over... */
298: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
299: } else {
1.54 paf 300: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 301: P($$, diving_code);
302: }
303: /* diving code; stack: current context */
1.20 paf 304: };
1.28 paf 305: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 306: $$=N(POOL);
1.54 paf 307: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 308: P($$, $2); /* diving code; stack: context,name */
1.1 paf 309: };
1.44 paf 310: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 311:
1.81 paf 312: construct: construct_by_code | construct_by_expr;
313: construct_by_code: '[' any_constructor_code_value ']' {
314: $$=$2; /* stack: context, name, value */
315: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
316: }
317: ;
1.90 paf 318: construct_by_expr: '(' expr_value ')' {
1.81 paf 319: $$=$2; /* stack: context, name, value */
320: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
321: }
1.52 paf 322: ;
1.55 paf 323: any_constructor_code_value:
324: empty_string_value /* optimized $var[] case */
1.52 paf 325: | STRING /* optimized $var[STRING] case */
1.55 paf 326: | constructor_code_value /* $var[something complex] */
1.1 paf 327: ;
1.55 paf 328: constructor_code_value: constructor_code {
1.25 paf 329: $$=N(POOL);
1.54 paf 330: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 331: P($$, $1); /* some code that writes to that context */
1.54 paf 332: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 333: };
1.55 paf 334: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 335: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
336:
1.1 paf 337: /* call */
338:
1.66 paf 339: call: call_value {
340: $$=$1; /* stack: value */
1.102 paf 341: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.66 paf 342: };
343: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 344: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 345: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 346: P($$, $3); /* filling method_frame.store_params */
1.66 paf 347: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 348: };
349:
1.43 paf 350: call_name: name_without_curly_rdive;
1.38 paf 351:
1.9 paf 352: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 353: store_param:
354: store_square_param
355: | store_round_param
356: | store_curly_param
1.31 paf 357: ;
1.69 paf 358: store_square_param: '[' store_code_param_parts ']' {$$=$2};
359: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.94 paf 360: store_curly_param: '{' store_curly_param_parts '}' {$$=$2};
1.69 paf 361: store_code_param_parts:
362: store_code_param_part
363: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
364: ;
365: store_expr_param_parts:
366: store_expr_param_part
367: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
368: ;
1.94 paf 369: store_curly_param_parts:
370: store_curly_param_part
371: | store_curly_param_parts ';' store_curly_param_part { $$=$1; P($$, $3) }
372: ;
1.69 paf 373: store_code_param_part:
1.78 paf 374: empty /* optimized [] case */
375: | STRING { /* optimized [STRING] case */
1.32 paf 376: $$=$1;
1.54 paf 377: O($$, OP_STORE_PARAM);
1.32 paf 378: }
1.78 paf 379: | constructor_code_value { /* [something complex] */
1.32 paf 380: $$=$1;
1.77 paf 381: O($$, OP_STORE_PARAM);
1.32 paf 382: }
383: ;
1.69 paf 384: store_expr_param_part: write_expr_value {
385: $$=N(POOL);
1.103 paf 386: PEA($$, $1);
1.69 paf 387: };
1.94 paf 388: store_curly_param_part: maybe_codes {
389: $$=N(POOL);
390: PCA($$, $1);
391: };
1.90 paf 392: write_expr_value: expr_value {
1.69 paf 393: $$=$1;
1.102 paf 394: O($$, OP_WRITE_EXPR_RESULT);
1.69 paf 395: };
1.1 paf 396:
397: /* name */
398:
1.20 paf 399: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 400:
1.9 paf 401: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 402: name_step: name_advance1 '.';
403: name_advance1: name_expr_value {
404: /* stack: context */
405: $$=$1; /* stack: context,name */
1.54 paf 406: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 407: };
408: name_advance2: name_expr_value {
409: /* stack: context */
410: $$=$1; /* stack: context,name */
1.54 paf 411: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 412: }
1.4 paf 413: | STRING BOGUS
1.1 paf 414: ;
415: name_expr_value:
1.4 paf 416: STRING /* subname_is_const */
1.1 paf 417: | name_expr_subvar_value /* $subname_is_var_value */
418: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
419: ;
420: name_expr_subvar_value: '$' subvar_ref_name_rdive {
421: $$=$2;
1.54 paf 422: O($$, OP_GET_ELEMENT);
1.1 paf 423: };
1.4 paf 424: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 425: $$=N(POOL);
1.54 paf 426: O($$, OP_CREATE_EWPOOL);
1.9 paf 427: P($$, $1);
1.102 paf 428: O($$, OP_WRITE_VALUE);
1.9 paf 429: P($$, $2);
1.54 paf 430: O($$, OP_REDUCE_EWPOOL);
1.1 paf 431: };
1.18 paf 432: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
433: subvar_ref_name_rdive_read: STRING {
1.25 paf 434: $$=N(POOL);
1.54 paf 435: O($$, OP_WITH_READ);
1.9 paf 436: P($$, $1);
1.1 paf 437: };
1.18 paf 438: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 439: $$=N(POOL);
1.54 paf 440: O($$, OP_WITH_ROOT);
1.18 paf 441: P($$, $2);
442: };
1.9 paf 443: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 444: subvar__get_write: '$' subvar_ref_name_rdive {
445: $$=$2;
1.54 paf 446: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 447: };
448:
1.44 paf 449: class_prefix: STRING ':' {
1.72 paf 450: $$=$1; // stack: class name string
451: O($$, OP_GET_CLASS);
1.1 paf 452: };
453:
454:
455: /* with */
456:
457: with: '$' name_without_curly_rdive '{' codes '}' {
458: $$=$2;
1.54 paf 459: O($$, OP_CREATE_RWPOOL);
1.9 paf 460: P($$, $4);
1.54 paf 461: O($$, OP_REDUCE_RWPOOL);
1.102 paf 462: O($$, OP_WRITE_VALUE);
1.1 paf 463: };
1.53 paf 464:
1.56 paf 465: /* expr */
1.53 paf 466:
1.81 paf 467: expr_value: expr {
468: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 469: change_string_literal_to_double_literal($$); // make that string literal Double
470: };
1.56 paf 471: expr:
1.62 paf 472: STRING
1.64 paf 473: | get_value
1.66 paf 474: | call_value
1.64 paf 475: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 476: | '(' expr ')' { $$ = $2; }
477: /* stack: operand // stack: @operand */
478: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 479: | '~' expr { $$=$2; O($$, OP_INV) }
480: | '!' expr { $$=$2; O($$, OP_NOT) }
481: | "def" expr { $$=$2; O($$, OP_DEF) }
482: | "in" expr { $$=$2; O($$, OP_IN) }
483: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 484: /* stack: a,b // stack: a@b */
485: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
486: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
487: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
488: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
489: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
490: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
491: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
492: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
493: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
494: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
495: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
496: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
497: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
498: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
499: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
500: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
501: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 502: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
503: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
504: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
505: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
506: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
507: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.95 paf 508: | expr "is" expr { $$=$1; P($$, $3); O($$, OP_IS) }
1.56 paf 509: ;
1.55 paf 510:
1.65 paf 511: string_inside_quotes_value: maybe_codes {
1.64 paf 512: $$=N(POOL);
513: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 514: P($$, $1); /* some code that writes to that context */
1.64 paf 515: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 516: };
1.1 paf 517:
1.27 paf 518: /* basics */
1.1 paf 519:
1.81 paf 520: write_string: STRING {
1.102 paf 521: // optimized from OP_STRING+OP_WRITE_VALUE to OP_STRING__WRITE
1.84 paf 522: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 523: };
524:
1.81 paf 525: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 526: empty: /* empty */ { $$=N(POOL) };
1.1 paf 527:
528: %%
1.105 paf 529: #endif
1.1 paf 530:
531: /*
532: 000$111(2222)00
533: 000$111{3333}00
1.9 paf 534: $,^: push,=0
1.1 paf 535: 1:( { break=pop
536: 2:( ) pop
537: 3:{ } pop
538:
539: 000^111(2222)4444{33333}4000
1.9 paf 540: $,^: push,=0
1.1 paf 541: 1:( { break=pop
542: 2:( )=4
543: 3:{ }=4
544: 4:[^({]=pop
545: */
546:
547: int yylex(YYSTYPE *lvalp, void *pc) {
548: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 549: #define RC {result=c; goto break2; }
1.1 paf 550:
551: register int c;
552: int result;
553:
554: if(PC->pending_state) {
555: result=PC->pending_state;
556: PC->pending_state=0;
557: return result;
558: }
559:
1.91 paf 560: const char *begin=PC->source;
561: const char *end;
1.9 paf 562: int begin_line=PC->line;
1.67 paf 563: int skip_analized=0;
1.50 paf 564: while(true) {
1.9 paf 565: c=*(end=(PC->source++));
1.1 paf 566:
1.4 paf 567: if(c=='\n') {
1.1 paf 568: PC->line++;
1.8 paf 569: PC->col=0;
1.10 paf 570: } else
1.4 paf 571: PC->col++;
1.73 paf 572:
573: // todo: # in 0+1 column comment
1.1 paf 574:
1.48 paf 575: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
576: if(c=='^')
577: switch(*PC->source) {
578: case '^': case '$': case ';':
579: case '[': case ']':
580: case '{': case '}':
581: case '"':
1.40 paf 582: if(end!=begin) {
583: // append piece till ^
584: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
585: }
1.63 paf 586: // reset piece 'begin' position & line
1.40 paf 587: begin=PC->source; // ^
1.9 paf 588: begin_line=PC->line;
1.40 paf 589: // skip over ^ and _
1.50 paf 590: PC->source++; PC->col++;
1.40 paf 591: // skip analysis = forced literal
1.1 paf 592: continue;
593: }
594: switch(PC->ls) {
1.10 paf 595:
596: // USER'S = NOT OURS
1.1 paf 597: case LS_USER:
1.48 paf 598: switch(c) {
599: case '$':
1.10 paf 600: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 601: RC;
602: case '^':
603: push_LS(PC, LS_METHOD_NAME);
604: RC;
605: case '@':
606: if(PC->col==0+1) {
607: push_LS(PC, LS_DEF_NAME);
608: RC;
609: }
610: break;
1.1 paf 611: }
1.48 paf 612: break;
613:
614: // STRING IN EXPRESSION
615: case LS_EXPRESSION_STRING:
616: switch(c) {
617: case '"':
618: pop_LS(PC); //"abc".
619: RC;
620: case '$':
621: push_LS(PC, LS_VAR_NAME_SIMPLE);
622: RC;
623: case '^':
1.10 paf 624: push_LS(PC, LS_METHOD_NAME);
1.48 paf 625: RC;
1.10 paf 626: }
627: break;
628:
629: // METHOD DEFINITION
630: case LS_DEF_NAME:
1.48 paf 631: switch(c) {
632: case '[':
1.10 paf 633: PC->ls=LS_DEF_PARAMS;
1.48 paf 634: RC;
635: case '\n':
636: PC->ls=LS_DEF_SPECIAL_BODY;
637: RC;
1.10 paf 638: }
639: break;
1.48 paf 640:
1.10 paf 641: case LS_DEF_PARAMS:
1.48 paf 642: switch(c) {
643: case ';':
644: RC;
645: case ']':
1.10 paf 646: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 647: RC;
1.49 paf 648: case '\n': // wrong. bailing out
1.10 paf 649: pop_LS(PC);
1.48 paf 650: RC;
1.10 paf 651: }
652: break;
1.48 paf 653:
1.10 paf 654: case LS_DEF_LOCALS:
1.48 paf 655: switch(c) {
656: case '[':
657: case ';':
658: RC;
659: case ']':
1.10 paf 660: PC->ls=LS_DEF_COMMENT;
1.48 paf 661: RC;
662: case '\n': // wrong. bailing out
1.10 paf 663: pop_LS(PC);
1.48 paf 664: RC;
1.10 paf 665: }
666: break;
1.48 paf 667:
1.10 paf 668: case LS_DEF_COMMENT:
669: if(c=='\n') {
670: pop_LS(PC);
1.48 paf 671: RC;
1.37 paf 672: }
673: break;
674:
1.48 paf 675: case LS_DEF_SPECIAL_BODY:
1.37 paf 676: if(c=='\n') {
1.48 paf 677: switch(*PC->source) {
678: case '@': case 0: // end of special_code
1.37 paf 679: pop_LS(PC);
1.48 paf 680: break;
681: }
682: RC;
683: }
684: break;
685:
686: // (EXPRESSION)
1.69 paf 687: case LS_VAR_ROUND:
688: case LS_METHOD_ROUND:
1.48 paf 689: switch(c) {
690: case ')':
691: if(--lexical_brackets_nestage==0)
1.69 paf 692: if(PC->ls==LS_METHOD_ROUND) // method round param ended
693: PC->ls=LS_METHOD_AFTER; // look for method end
694: else // PC->ls==LS_VAR_ROUND // variable constructor ended
695: pop_LS(PC); // return to normal life
1.48 paf 696: RC;
697: case '$':
1.69 paf 698: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 699: RC;
700: case '^':
701: push_LS(PC, LS_METHOD_NAME);
702: RC;
703: case '(':
704: lexical_brackets_nestage++;
705: RC;
1.67 paf 706: case '-':
707: if(*PC->source=='f') { // -f
708: skip_analized=1;
709: result=FEXISTS;
710: } else
711: result=c;
712: goto break2;
713: case '+': case '*': case '/': case '%':
1.58 paf 714: case '~':
1.48 paf 715: case ';':
716: RC;
1.59 paf 717: case '&': case '|': case '#':
1.58 paf 718: if(*PC->source==c) { // && ||
1.59 paf 719: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 720: skip_analized=1;
1.58 paf 721: } else
722: result=c;
723: goto break2;
724: case '<': case '>': case '=': case '!':
725: if(*PC->source=='=') { // <= >= == !=
1.67 paf 726: skip_analized=1;
1.58 paf 727: switch(c) {
728: case '<': result=NLE; break;
729: case '>': result=NGE; break;
730: case '=': result=NEQ; break;
731: case '!': result=NNE; break;
732: }
733: } else
734: result=c;
735: goto break2;
1.48 paf 736: case '"':
737: push_LS(PC, LS_EXPRESSION_STRING);
738: RC;
1.50 paf 739: case 'l': case 'g': case 'e': case 'n':
1.51 paf 740: if(end==begin) // right after whitespace
1.58 paf 741: switch(*PC->source) {
1.51 paf 742: // case '?': // ok [and bad cases, yacc would bark at them]
743: case 't': // lt gt [et nt]
1.62 paf 744: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 745: skip_analized=1;
1.58 paf 746: goto break2;
1.51 paf 747: case 'e': // le ge ne [ee]
1.58 paf 748: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 749: skip_analized=1;
1.58 paf 750: goto break2;
1.51 paf 751: case 'q': // eq [lq gq nq]
1.58 paf 752: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 753: skip_analized=1;
754: goto break2;
755: }
756: break;
757: case 'i':
758: if(end==begin) // right after whitespace
1.95 paf 759: switch(PC->source[0]) {
760: case 'n':
761: { // in
762: skip_analized=1;
763: result=IN;
764: goto break2;
765: }
766: case 's':
767: { // is
768: skip_analized=1;
769: result=IS;
770: goto break2;
771: }
1.67 paf 772: }
773: break;
774: case 'd':
775: if(end==begin) // right after whitespace
776: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
777: skip_analized=2;
778: result=DEF;
1.58 paf 779: goto break2;
1.50 paf 780: }
1.48 paf 781: break;
782: case ' ': case '\t': case '\n':
1.63 paf 783: if(end!=begin) { // there were a string after previous operator?
784: result=0; // return that string
785: goto break2;
1.48 paf 786: }
1.63 paf 787: // that's a leading|traling space or after-operator-space
788: // ignoring it
789: // reset piece 'begin' position & line
1.58 paf 790: begin=PC->source; // after whitespace char
1.48 paf 791: begin_line=PC->line;
792: continue;
1.1 paf 793: }
794: break;
795:
1.10 paf 796: // VARIABLE GET/PUT/WITH
1.1 paf 797: case LS_VAR_NAME_SIMPLE:
1.69 paf 798: case LS_EXPRESSION_VAR_NAME:
799: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 800: // name in expr ends also before binary operators
1.48 paf 801: switch(c) {
1.92 paf 802: case '-':
1.48 paf 803: pop_LS(PC);
804: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
805: result=EON;
806: goto break2;
807: }
808: }
809: switch(c) {
810: case 0:
811: case ' ': case '\t': case '\n':
812: case ';':
1.64 paf 813: case ']': case '}': case ')': case '"':
1.83 paf 814: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 815: case '+': case '*': case '/': case '%':
816: case '&': case '|':
817: case '=': case '!':
1.99 paf 818: // common delimiters
1.101 paf 819: case '\'': case ',':
1.1 paf 820: pop_LS(PC);
1.32 paf 821: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 822: result=EON;
1.1 paf 823: goto break2;
1.48 paf 824: case '[':
825: PC->ls=LS_VAR_SQUARE;
1.1 paf 826: lexical_brackets_nestage=1;
1.48 paf 827: RC;
828: case '{':
829: if(begin==end) { // ${name}, no need of EON, switching LS
830: PC->ls=LS_VAR_NAME_CURLY;
831: } else {
832: PC->ls=LS_VAR_CURLY;
833: lexical_brackets_nestage=1;
834: }
1.69 paf 835:
1.48 paf 836: RC;
837: case '(':
1.69 paf 838: PC->ls=LS_VAR_ROUND;
1.1 paf 839: lexical_brackets_nestage=1;
1.48 paf 840: RC;
841: case '.': // name part delim
842: case '$': // name part subvar
843: case ':': // ':name' or 'class:name'
844: RC;
1.1 paf 845: }
846: break;
1.48 paf 847:
1.1 paf 848: case LS_VAR_NAME_CURLY:
1.48 paf 849: switch(c) {
850: case '}': // ${name} finished, restoring LS
1.1 paf 851: pop_LS(PC);
1.48 paf 852: RC;
853: case '.': // name part delim
854: case '$': // name part subvar
855: case ':': // ':name' or 'class:name'
856: RC;
1.1 paf 857: }
858: break;
1.48 paf 859:
860: case LS_VAR_SQUARE:
861: switch(c) {
862: case '$':
1.10 paf 863: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 864: RC;
865: case '^':
1.10 paf 866: push_LS(PC, LS_METHOD_NAME);
1.48 paf 867: RC;
868: case ']':
1.1 paf 869: if(--lexical_brackets_nestage==0) {
870: pop_LS(PC);
1.48 paf 871: RC;
1.1 paf 872: }
1.48 paf 873: break;
874: case ';': // operator_or_fmt;value delim
875: RC;
876: case '[':
877: lexical_brackets_nestage++;
878: break;
1.1 paf 879: }
880: break;
1.48 paf 881:
1.1 paf 882: case LS_VAR_CURLY:
1.48 paf 883: switch(c) {
884: case '$':
1.10 paf 885: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 886: RC;
887: case '^':
1.10 paf 888: push_LS(PC, LS_METHOD_NAME);
1.48 paf 889: RC;
890: case '}':
1.1 paf 891: if(--lexical_brackets_nestage==0) {
892: pop_LS(PC);
1.48 paf 893: RC;
1.1 paf 894: }
1.48 paf 895: break;
896: case '{':
1.1 paf 897: lexical_brackets_nestage++;
1.48 paf 898: break;
899: }
1.1 paf 900: break;
901:
1.10 paf 902: // METHOD CALL
1.1 paf 903: case LS_METHOD_NAME:
1.48 paf 904: switch(c) {
905: case '[':
906: PC->ls=LS_METHOD_SQUARE;
1.1 paf 907: lexical_brackets_nestage=1;
1.48 paf 908: RC;
909: case '{':
1.1 paf 910: PC->ls=LS_METHOD_CURLY;
911: lexical_brackets_nestage=1;
1.48 paf 912: RC;
1.69 paf 913: case '(':
914: PC->ls=LS_METHOD_ROUND;
915: lexical_brackets_nestage=1;
916: RC;
1.48 paf 917: case '.': // name part delim
918: case '$': // name part subvar
919: case ':': // ':name' or 'class:name'
920: RC;
1.1 paf 921: }
922: break;
1.48 paf 923:
924: case LS_METHOD_SQUARE:
925: switch(c) {
926: case '$':
1.10 paf 927: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 928: RC;
929: case '^':
1.10 paf 930: push_LS(PC, LS_METHOD_NAME);
1.48 paf 931: RC;
932: case ';': // param delim
933: RC;
934: case ']':
1.1 paf 935: if(--lexical_brackets_nestage==0) {
936: PC->ls=LS_METHOD_AFTER;
1.48 paf 937: RC;
1.1 paf 938: }
1.48 paf 939: break;
940: case '[':
1.1 paf 941: lexical_brackets_nestage++;
1.48 paf 942: break;
943: }
1.1 paf 944: break;
1.48 paf 945:
1.1 paf 946: case LS_METHOD_CURLY:
1.48 paf 947: switch(c) {
948: case '$':
1.10 paf 949: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 950: RC;
951: case '^':
1.10 paf 952: push_LS(PC, LS_METHOD_NAME);
1.94 paf 953: RC;
954: case ';': // param delim
1.48 paf 955: RC;
956: case '}':
1.1 paf 957: if(--lexical_brackets_nestage==0) {
958: PC->ls=LS_METHOD_AFTER;
1.48 paf 959: RC;
1.1 paf 960: }
1.48 paf 961: break;
962: case '{':
1.1 paf 963: lexical_brackets_nestage++;
1.48 paf 964: break;
965: }
1.1 paf 966: break;
1.48 paf 967:
1.1 paf 968: case LS_METHOD_AFTER:
1.69 paf 969: if(c=='[') {/* ][ }[ )[ */
1.48 paf 970: PC->ls=LS_METHOD_SQUARE;
1.1 paf 971: lexical_brackets_nestage=1;
1.48 paf 972: RC;
1.1 paf 973: }
1.69 paf 974: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 975: PC->ls=LS_METHOD_CURLY;
1.69 paf 976: lexical_brackets_nestage=1;
977: RC;
978: }
979: if(c=='(') {/* ]( }( )( */
980: PC->ls=LS_METHOD_ROUND;
1.1 paf 981: lexical_brackets_nestage=1;
1.48 paf 982: RC;
1.1 paf 983: }
984: pop_LS(PC);
1.32 paf 985: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 986: result=EON;
1.1 paf 987: goto break2;
988: }
1.9 paf 989: if(c==0) {
1.1 paf 990: result=-1;
991: break;
992: }
993: }
994:
995: break2:
1.59 paf 996: if(end!=begin) { // there is last piece?
997: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
998: // strip last \n
1.10 paf 999: end--;
1.59 paf 1000: }
1001: if(end!=begin) { // last piece still alive?
1002: // append it
1.30 paf 1003: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
1004: }
1.59 paf 1005: }
1006: if(PC->string->size()) { // something accumulated?
1.17 paf 1007: // create STRING value: array of OP_VALUE+vstring
1.55 paf 1008: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 1009: // new pieces storage
1.25 paf 1010: PC->string=NEW String(POOL);
1.58 paf 1011: // make current result be pending for next call, return STRING for now
1012: PC->pending_state=result; result=STRING;
1013: }
1.67 paf 1014: if(skip_analized) {
1015: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 1016: }
1.58 paf 1017: return result;
1.1 paf 1018: }
1019:
1.9 paf 1020: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 1021: {
1.46 paf 1022: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 1023: return 1;
1024: }
1025:
1026: static void
1.9 paf 1027: yyprint(
1.1 paf 1028: FILE *file,
1029: int type,
1030: YYSTYPE value)
1031: {
1.9 paf 1032: if(type==STRING)
1.38 paf 1033: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 1034: }
1035:
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