Annotation of parser3/src/main/compile.y, revision 1.116
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:
1.116 ! paf 8: $Id: compile.y,v 1.115 2001/03/25 10:14:39 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
1.114 paf 51: #define PC (*(parse_control *)pc)
52: #define POOL (*PC.pool)
1.25 paf 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
1.114 paf 65: %token BAD_HEX_LITERAL
1.58 paf 66:
1.59 paf 67: %token LAND "&&"
1.58 paf 68: %token LOR "||"
1.59 paf 69: %token LXOR "##"
1.58 paf 70:
71: %token NLE "<="
72: %token NGE ">="
73: %token NEQ "=="
74: %token NNE "!="
75:
76: %token SLT "lt"
77: %token SGT "gt"
78: %token SLE "le"
79: %token SGE "ge"
80: %token SEQ "eq"
81: %token SNE "ne"
82:
1.67 paf 83: %token DEF "def"
84: %token IN "in"
85: %token FEXISTS "-f"
1.95 paf 86: %token IS "is"
1.67 paf 87:
1.57 paf 88: /* logical */
1.95 paf 89: %left "is"
1.61 paf 90: %left "lt" "gt" "le" "ge"
91: %left "eq" "ne"
1.59 paf 92: %left '<' '>' "<=" ">=" "##"
1.57 paf 93: %left "==" "!="
94: %left "||"
95: %left "&&"
1.67 paf 96: %left "def" "in" "-f"
1.68 paf 97: %left '!'
1.57 paf 98:
99: /* bitwise */
1.59 paf 100: %left '#'
1.57 paf 101: %left '&' '|'
1.68 paf 102: %left '~'
1.57 paf 103:
1.56 paf 104: /* numerical */
1.55 paf 105: %left '-' '+'
1.57 paf 106: %left '*' '/' '%'
1.56 paf 107: %left NEG /* negation: unary - */
1.1 paf 108:
109: %%
1.88 paf 110: all:
1.10 paf 111: one_big_piece {
1.75 paf 112: Method& method=*NEW Method(POOL,
1.85 paf 113: *main_method_name,
1.81 paf 114: 0, 0, /*min, max numbered_params_count*/
1.75 paf 115: 0/*param_names*/, 0/*local_names*/,
116: $1/*parser_code*/, 0/*native_code*/);
1.114 paf 117: PC.cclass->add_method(*main_method_name, method);
1.10 paf 118: }
119: | methods;
120:
121: methods: method | methods method;
122: one_big_piece: maybe_codes;
123:
1.34 paf 124: method: control_method | code_method;
125:
126: control_method: '@' STRING '\n'
127: control_strings {
1.82 paf 128: const String& command=*SLA2S($2);
1.34 paf 129: YYSTYPE strings_code=$4;
1.37 paf 130: if(strings_code->size()<1*2) {
1.114 paf 131: strcpy(PC.error, "@");
132: strcat(PC.error, command.cstr());
133: strcat(PC.error, " is empty");
1.37 paf 134: YYERROR;
135: }
1.74 paf 136: if(command==CLASS_NAME) {
1.114 paf 137: if(PC.cclass!=&PC.request->ROOT) { // already changed from default?
138: strcpy(PC.error, "class already have a name '");
139: strncat(PC.error, PC.cclass->name().cstr(), 100);
140: strcat(PC.error, "'");
1.73 paf 141: YYERROR;
142: }
143: if(strings_code->size()==1*2) {
144: // new class' name
1.82 paf 145: const String *name=SLA2S(strings_code);
1.73 paf 146: // creating the class
1.114 paf 147: PC.cclass=NEW VClass(POOL);
148: PC.cclass->set_name(*name);
1.73 paf 149: // defaulting base. may change with @BASE
1.114 paf 150: PC.cclass->set_base(PC.request->ROOT);
1.73 paf 151: // append to request's classes
1.114 paf 152: PC.request->classes().put(*name, PC.cclass);
1.73 paf 153: } else {
1.114 paf 154: strcpy(PC.error, "@"CLASS_NAME" must contain sole name");
1.34 paf 155: YYERROR;
156: }
157: } else {
1.85 paf 158: if(command==USE_CONTROL_METHOD_NAME) {
1.109 paf 159: for(int i=0; i<strings_code->size(); i+=2)
1.114 paf 160: PC.request->use_file(
161: PC.request->absolute(*SLA2S(strings_code, i)));
1.74 paf 162: } else if(command==BASE_NAME) {
1.114 paf 163: if(PC.cclass->base()!=&PC.request->ROOT) { // already changed from default?
164: strcpy(PC.error, "class already have a base '");
165: strncat(PC.error, PC.cclass->base()->name().cstr(), 100);
166: strcat(PC.error, "'");
1.73 paf 167: YYERROR;
168: }
1.45 paf 169: if(strings_code->size()==1*2) {
1.82 paf 170: const String& base_name=*SLA2S(strings_code);
1.45 paf 171: VClass *base=static_cast<VClass *>(
1.114 paf 172: PC.request->classes().get(base_name));
1.45 paf 173: if(!base) {
1.114 paf 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
1.114 paf 179: if(PC.cclass==base) {
180: strcpy(PC.error, "@"CLASS_NAME" equals @"BASE_NAME);
1.34 paf 181: YYERROR;
182: }
1.114 paf 183: PC.cclass->set_base(*base);
1.45 paf 184: } else {
1.114 paf 185: strcpy(PC.error, "@"BASE_NAME" must contain sole name");
1.45 paf 186: YYERROR;
1.34 paf 187: }
188: } else {
1.114 paf 189: strcpy(PC.error, "'");
190: strncat(PC.error, command.cstr(), MAX_STRING/2);
191: strcat(PC.error, "' invalid special name. valid names are "
1.92 paf 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);
1.114 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:
1.116 ! paf 362: empty /* optimized [] case */
! 363: | store_code_param_parts_not_empty
! 364: ;
! 365: store_code_param_parts_not_empty:
1.69 paf 366: store_code_param_part
367: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
368: ;
369: store_expr_param_parts:
370: store_expr_param_part
371: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
372: ;
1.94 paf 373: store_curly_param_parts:
374: store_curly_param_part
375: | store_curly_param_parts ';' store_curly_param_part { $$=$1; P($$, $3) }
376: ;
1.69 paf 377: store_code_param_part:
1.116 ! paf 378: STRING { /* optimized [STRING] case */
1.32 paf 379: $$=$1;
1.54 paf 380: O($$, OP_STORE_PARAM);
1.32 paf 381: }
1.78 paf 382: | constructor_code_value { /* [something complex] */
1.32 paf 383: $$=$1;
1.77 paf 384: O($$, OP_STORE_PARAM);
1.32 paf 385: }
386: ;
1.69 paf 387: store_expr_param_part: write_expr_value {
388: $$=N(POOL);
1.103 paf 389: PEA($$, $1);
1.69 paf 390: };
1.94 paf 391: store_curly_param_part: maybe_codes {
392: $$=N(POOL);
393: PCA($$, $1);
394: };
1.90 paf 395: write_expr_value: expr_value {
1.69 paf 396: $$=$1;
1.102 paf 397: O($$, OP_WRITE_EXPR_RESULT);
1.69 paf 398: };
1.1 paf 399:
400: /* name */
401:
1.20 paf 402: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 403:
1.9 paf 404: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 405: name_step: name_advance1 '.';
406: name_advance1: name_expr_value {
407: /* stack: context */
408: $$=$1; /* stack: context,name */
1.54 paf 409: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 410: };
411: name_advance2: name_expr_value {
412: /* stack: context */
413: $$=$1; /* stack: context,name */
1.54 paf 414: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 415: }
1.4 paf 416: | STRING BOGUS
1.1 paf 417: ;
418: name_expr_value:
1.4 paf 419: STRING /* subname_is_const */
1.1 paf 420: | name_expr_subvar_value /* $subname_is_var_value */
421: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
422: ;
423: name_expr_subvar_value: '$' subvar_ref_name_rdive {
424: $$=$2;
1.54 paf 425: O($$, OP_GET_ELEMENT);
1.1 paf 426: };
1.4 paf 427: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 428: $$=N(POOL);
1.54 paf 429: O($$, OP_CREATE_EWPOOL);
1.9 paf 430: P($$, $1);
1.102 paf 431: O($$, OP_WRITE_VALUE);
1.9 paf 432: P($$, $2);
1.54 paf 433: O($$, OP_REDUCE_EWPOOL);
1.1 paf 434: };
1.18 paf 435: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
436: subvar_ref_name_rdive_read: STRING {
1.25 paf 437: $$=N(POOL);
1.54 paf 438: O($$, OP_WITH_READ);
1.9 paf 439: P($$, $1);
1.1 paf 440: };
1.18 paf 441: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 442: $$=N(POOL);
1.54 paf 443: O($$, OP_WITH_ROOT);
1.18 paf 444: P($$, $2);
445: };
1.9 paf 446: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 447: subvar__get_write: '$' subvar_ref_name_rdive {
448: $$=$2;
1.54 paf 449: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 450: };
451:
1.44 paf 452: class_prefix: STRING ':' {
1.72 paf 453: $$=$1; // stack: class name string
454: O($$, OP_GET_CLASS);
1.1 paf 455: };
456:
457:
458: /* with */
459:
460: with: '$' name_without_curly_rdive '{' codes '}' {
461: $$=$2;
1.54 paf 462: O($$, OP_CREATE_RWPOOL);
1.9 paf 463: P($$, $4);
1.54 paf 464: O($$, OP_REDUCE_RWPOOL);
1.102 paf 465: O($$, OP_WRITE_VALUE);
1.1 paf 466: };
1.53 paf 467:
1.56 paf 468: /* expr */
1.53 paf 469:
1.81 paf 470: expr_value: expr {
471: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 472: change_string_literal_to_double_literal($$); // make that string literal Double
473: };
1.56 paf 474: expr:
1.62 paf 475: STRING
1.64 paf 476: | get_value
1.66 paf 477: | call_value
1.64 paf 478: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 479: | '(' expr ')' { $$ = $2; }
480: /* stack: operand // stack: @operand */
481: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 482: | '~' expr { $$=$2; O($$, OP_INV) }
483: | '!' expr { $$=$2; O($$, OP_NOT) }
484: | "def" expr { $$=$2; O($$, OP_DEF) }
485: | "in" expr { $$=$2; O($$, OP_IN) }
486: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 487: /* stack: a,b // stack: a@b */
488: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
489: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
490: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
491: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
492: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
493: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
494: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
495: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
496: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
497: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
498: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
499: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
500: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
501: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
502: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
503: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
504: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 505: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
506: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
507: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
508: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
509: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
510: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.95 paf 511: | expr "is" expr { $$=$1; P($$, $3); O($$, OP_IS) }
1.56 paf 512: ;
1.55 paf 513:
1.65 paf 514: string_inside_quotes_value: maybe_codes {
1.64 paf 515: $$=N(POOL);
516: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 517: P($$, $1); /* some code that writes to that context */
1.64 paf 518: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 519: };
1.1 paf 520:
1.27 paf 521: /* basics */
1.1 paf 522:
1.81 paf 523: write_string: STRING {
1.102 paf 524: // optimized from OP_STRING+OP_WRITE_VALUE to OP_STRING__WRITE
1.84 paf 525: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 526: };
527:
1.81 paf 528: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 529: empty: /* empty */ { $$=N(POOL) };
1.1 paf 530:
531: %%
1.105 paf 532: #endif
1.1 paf 533:
534: /*
535: 000$111(2222)00
536: 000$111{3333}00
1.9 paf 537: $,^: push,=0
1.1 paf 538: 1:( { break=pop
539: 2:( ) pop
540: 3:{ } pop
541:
542: 000^111(2222)4444{33333}4000
1.9 paf 543: $,^: push,=0
1.1 paf 544: 1:( { break=pop
545: 2:( )=4
546: 3:{ }=4
547: 4:[^({]=pop
548: */
549:
1.110 paf 550: static int yylex(YYSTYPE *lvalp, void *pc) {
1.114 paf 551: #define lexical_brackets_nestage PC.brackets_nestages[PC.sp]
1.48 paf 552: #define RC {result=c; goto break2; }
1.1 paf 553:
554: register int c;
555: int result;
556:
1.114 paf 557: if(PC.pending_state) {
558: result=PC.pending_state;
559: PC.pending_state=0;
1.1 paf 560: return result;
561: }
562:
1.114 paf 563: const char *begin=PC.source;
1.91 paf 564: const char *end;
1.114 paf 565: int begin_line=PC.line;
1.67 paf 566: int skip_analized=0;
1.50 paf 567: while(true) {
1.114 paf 568: c=*(end=(PC.source++));
1.1 paf 569:
1.4 paf 570: if(c=='\n') {
1.114 paf 571: PC.line++;
572: PC.col=0;
1.10 paf 573: } else
1.114 paf 574: PC.col++;
1.73 paf 575:
1.48 paf 576: if(c=='^')
1.114 paf 577: switch(*PC.source) {
578: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
1.48 paf 579: case '^': case '$': case ';':
580: case '[': case ']':
581: case '{': case '}':
1.114 paf 582: case '"':
1.40 paf 583: if(end!=begin) {
584: // append piece till ^
1.114 paf 585: PC.string->APPEND(begin, end-begin, PC.file, begin_line);
1.40 paf 586: }
1.63 paf 587: // reset piece 'begin' position & line
1.114 paf 588: begin=PC.source; // ^
589: begin_line=PC.line;
1.40 paf 590: // skip over ^ and _
1.114 paf 591: PC.source++; PC.col++;
1.40 paf 592: // skip analysis = forced literal
1.1 paf 593: continue;
1.114 paf 594:
595: // converting ^#HH into char(hex(HH))
596: case '#':
597: if(end!=begin) {
598: // append piece till ^
599: PC.string->APPEND(begin, end-begin, PC.file, begin_line);
600: }
601: // #HH ?
602: if(PC.source[0]=='#' && PC.source[1] && PC.source[2]) {
603: char *hex=(char *)POOL.malloc(1);
604: hex[0]=
605: hex_value[(unsigned char)PC.source[1]]*0x10+
606: hex_value[(unsigned char)PC.source[2]];
607: if(hex[0]==0) {
608: result=BAD_HEX_LITERAL;
609: goto break2; // wrong hex value[no ^#00 chars allowed]: bail out
610: }
611: // append char(hex(HH))
612: PC.string->APPEND(hex, 1, PC.file, begin_line);
613: // skip over ^#HH
614: PC.source+=3;
615: PC.col+=3;
616: // reset piece 'begin' position & line
617: begin=PC.source; // ^
618: begin_line=PC.line;
619: continue;
620: }
621: break;
1.1 paf 622: }
1.113 paf 623: // #comment start skipping
1.114 paf 624: if(c=='#' && PC.col==1) {
1.112 paf 625: if(end!=begin) {
626: // append piece till #
1.115 paf 627: PC.string->APPEND(begin, end-begin, PC.file, begin_line);
1.112 paf 628: }
629: // fall into COMMENT lexical state [wait for \n]
630: push_LS(PC, LS_COMMENT);
631: }
1.114 paf 632: switch(PC.ls) {
1.10 paf 633:
634: // USER'S = NOT OURS
1.1 paf 635: case LS_USER:
1.48 paf 636: switch(c) {
637: case '$':
1.10 paf 638: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 639: RC;
640: case '^':
641: push_LS(PC, LS_METHOD_NAME);
642: RC;
643: case '@':
1.114 paf 644: if(PC.col==0+1) {
1.48 paf 645: push_LS(PC, LS_DEF_NAME);
646: RC;
647: }
648: break;
1.112 paf 649: }
650: break;
651:
652: // #COMMENT
653: case LS_COMMENT:
654: if(c=='\n') {
655: // skip comment
1.114 paf 656: begin=PC.source;
657: begin_line=PC.line;
1.112 paf 658:
659: pop_LS(PC);
660: continue;
1.1 paf 661: }
1.48 paf 662: break;
663:
664: // STRING IN EXPRESSION
665: case LS_EXPRESSION_STRING:
666: switch(c) {
667: case '"':
668: pop_LS(PC); //"abc".
669: RC;
670: case '$':
671: push_LS(PC, LS_VAR_NAME_SIMPLE);
672: RC;
673: case '^':
1.10 paf 674: push_LS(PC, LS_METHOD_NAME);
1.48 paf 675: RC;
1.10 paf 676: }
677: break;
678:
679: // METHOD DEFINITION
680: case LS_DEF_NAME:
1.48 paf 681: switch(c) {
682: case '[':
1.114 paf 683: PC.ls=LS_DEF_PARAMS;
1.48 paf 684: RC;
685: case '\n':
1.114 paf 686: PC.ls=LS_DEF_SPECIAL_BODY;
1.48 paf 687: RC;
1.10 paf 688: }
689: break;
1.48 paf 690:
1.10 paf 691: case LS_DEF_PARAMS:
1.48 paf 692: switch(c) {
693: case ';':
694: RC;
695: case ']':
1.114 paf 696: PC.ls=*PC.source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 697: RC;
1.49 paf 698: case '\n': // wrong. bailing out
1.10 paf 699: pop_LS(PC);
1.48 paf 700: RC;
1.10 paf 701: }
702: break;
1.48 paf 703:
1.10 paf 704: case LS_DEF_LOCALS:
1.48 paf 705: switch(c) {
706: case '[':
707: case ';':
708: RC;
709: case ']':
1.114 paf 710: PC.ls=LS_DEF_COMMENT;
1.48 paf 711: RC;
712: case '\n': // wrong. bailing out
1.10 paf 713: pop_LS(PC);
1.48 paf 714: RC;
1.10 paf 715: }
716: break;
1.48 paf 717:
1.10 paf 718: case LS_DEF_COMMENT:
719: if(c=='\n') {
720: pop_LS(PC);
1.48 paf 721: RC;
1.37 paf 722: }
723: break;
724:
1.48 paf 725: case LS_DEF_SPECIAL_BODY:
1.37 paf 726: if(c=='\n') {
1.114 paf 727: switch(*PC.source) {
1.48 paf 728: case '@': case 0: // end of special_code
1.37 paf 729: pop_LS(PC);
1.48 paf 730: break;
731: }
732: RC;
733: }
734: break;
735:
736: // (EXPRESSION)
1.69 paf 737: case LS_VAR_ROUND:
738: case LS_METHOD_ROUND:
1.48 paf 739: switch(c) {
740: case ')':
741: if(--lexical_brackets_nestage==0)
1.114 paf 742: if(PC.ls==LS_METHOD_ROUND) // method round param ended
743: PC.ls=LS_METHOD_AFTER; // look for method end
744: else // PC.ls==LS_VAR_ROUND // variable constructor ended
1.69 paf 745: pop_LS(PC); // return to normal life
1.48 paf 746: RC;
747: case '$':
1.69 paf 748: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 749: RC;
750: case '^':
751: push_LS(PC, LS_METHOD_NAME);
752: RC;
753: case '(':
754: lexical_brackets_nestage++;
755: RC;
1.67 paf 756: case '-':
1.114 paf 757: if(*PC.source=='f') { // -f
1.67 paf 758: skip_analized=1;
759: result=FEXISTS;
760: } else
761: result=c;
762: goto break2;
763: case '+': case '*': case '/': case '%':
1.58 paf 764: case '~':
1.48 paf 765: case ';':
766: RC;
1.59 paf 767: case '&': case '|': case '#':
1.114 paf 768: if(*PC.source==c) { // && ||
1.59 paf 769: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 770: skip_analized=1;
1.58 paf 771: } else
772: result=c;
773: goto break2;
774: case '<': case '>': case '=': case '!':
1.114 paf 775: if(*PC.source=='=') { // <= >= == !=
1.67 paf 776: skip_analized=1;
1.58 paf 777: switch(c) {
778: case '<': result=NLE; break;
779: case '>': result=NGE; break;
780: case '=': result=NEQ; break;
781: case '!': result=NNE; break;
782: }
783: } else
784: result=c;
785: goto break2;
1.48 paf 786: case '"':
787: push_LS(PC, LS_EXPRESSION_STRING);
788: RC;
1.50 paf 789: case 'l': case 'g': case 'e': case 'n':
1.51 paf 790: if(end==begin) // right after whitespace
1.114 paf 791: switch(*PC.source) {
1.51 paf 792: // case '?': // ok [and bad cases, yacc would bark at them]
793: case 't': // lt gt [et nt]
1.62 paf 794: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 795: skip_analized=1;
1.58 paf 796: goto break2;
1.51 paf 797: case 'e': // le ge ne [ee]
1.58 paf 798: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 799: skip_analized=1;
1.58 paf 800: goto break2;
1.51 paf 801: case 'q': // eq [lq gq nq]
1.58 paf 802: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 803: skip_analized=1;
804: goto break2;
805: }
806: break;
807: case 'i':
808: if(end==begin) // right after whitespace
1.114 paf 809: switch(PC.source[0]) {
1.95 paf 810: case 'n':
811: { // in
812: skip_analized=1;
813: result=IN;
814: goto break2;
815: }
816: case 's':
817: { // is
818: skip_analized=1;
819: result=IS;
820: goto break2;
821: }
1.67 paf 822: }
823: break;
824: case 'd':
825: if(end==begin) // right after whitespace
1.114 paf 826: if(PC.source[0]=='e' && PC.source[1]=='f') { // def
1.67 paf 827: skip_analized=2;
828: result=DEF;
1.58 paf 829: goto break2;
1.50 paf 830: }
1.48 paf 831: break;
832: case ' ': case '\t': case '\n':
1.63 paf 833: if(end!=begin) { // there were a string after previous operator?
834: result=0; // return that string
835: goto break2;
1.48 paf 836: }
1.63 paf 837: // that's a leading|traling space or after-operator-space
838: // ignoring it
839: // reset piece 'begin' position & line
1.114 paf 840: begin=PC.source; // after whitespace char
841: begin_line=PC.line;
1.48 paf 842: continue;
1.1 paf 843: }
844: break;
845:
1.10 paf 846: // VARIABLE GET/PUT/WITH
1.1 paf 847: case LS_VAR_NAME_SIMPLE:
1.69 paf 848: case LS_EXPRESSION_VAR_NAME:
1.114 paf 849: if(PC.ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 850: // name in expr ends also before binary operators
1.48 paf 851: switch(c) {
1.92 paf 852: case '-':
1.48 paf 853: pop_LS(PC);
1.114 paf 854: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.48 paf 855: result=EON;
856: goto break2;
857: }
858: }
859: switch(c) {
860: case 0:
861: case ' ': case '\t': case '\n':
862: case ';':
1.64 paf 863: case ']': case '}': case ')': case '"':
1.83 paf 864: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 865: case '+': case '*': case '/': case '%':
866: case '&': case '|':
867: case '=': case '!':
1.99 paf 868: // common delimiters
1.101 paf 869: case '\'': case ',':
1.1 paf 870: pop_LS(PC);
1.114 paf 871: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.13 paf 872: result=EON;
1.1 paf 873: goto break2;
1.48 paf 874: case '[':
1.114 paf 875: PC.ls=LS_VAR_SQUARE;
1.1 paf 876: lexical_brackets_nestage=1;
1.48 paf 877: RC;
878: case '{':
879: if(begin==end) { // ${name}, no need of EON, switching LS
1.114 paf 880: PC.ls=LS_VAR_NAME_CURLY;
1.48 paf 881: } else {
1.114 paf 882: PC.ls=LS_VAR_CURLY;
1.48 paf 883: lexical_brackets_nestage=1;
884: }
1.69 paf 885:
1.48 paf 886: RC;
887: case '(':
1.114 paf 888: PC.ls=LS_VAR_ROUND;
1.1 paf 889: lexical_brackets_nestage=1;
1.48 paf 890: RC;
891: case '.': // name part delim
892: case '$': // name part subvar
893: case ':': // ':name' or 'class:name'
894: RC;
1.1 paf 895: }
896: break;
1.48 paf 897:
1.1 paf 898: case LS_VAR_NAME_CURLY:
1.48 paf 899: switch(c) {
900: case '}': // ${name} finished, restoring LS
1.1 paf 901: pop_LS(PC);
1.48 paf 902: RC;
903: case '.': // name part delim
904: case '$': // name part subvar
905: case ':': // ':name' or 'class:name'
906: RC;
1.1 paf 907: }
908: break;
1.48 paf 909:
910: case LS_VAR_SQUARE:
911: switch(c) {
912: case '$':
1.10 paf 913: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 914: RC;
915: case '^':
1.10 paf 916: push_LS(PC, LS_METHOD_NAME);
1.48 paf 917: RC;
918: case ']':
1.1 paf 919: if(--lexical_brackets_nestage==0) {
920: pop_LS(PC);
1.48 paf 921: RC;
1.1 paf 922: }
1.48 paf 923: break;
924: case ';': // operator_or_fmt;value delim
925: RC;
926: case '[':
927: lexical_brackets_nestage++;
928: break;
1.1 paf 929: }
930: break;
1.48 paf 931:
1.1 paf 932: case LS_VAR_CURLY:
1.48 paf 933: switch(c) {
934: case '$':
1.10 paf 935: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 936: RC;
937: case '^':
1.10 paf 938: push_LS(PC, LS_METHOD_NAME);
1.48 paf 939: RC;
940: case '}':
1.1 paf 941: if(--lexical_brackets_nestage==0) {
942: pop_LS(PC);
1.48 paf 943: RC;
1.1 paf 944: }
1.48 paf 945: break;
946: case '{':
1.1 paf 947: lexical_brackets_nestage++;
1.48 paf 948: break;
949: }
1.1 paf 950: break;
951:
1.10 paf 952: // METHOD CALL
1.1 paf 953: case LS_METHOD_NAME:
1.48 paf 954: switch(c) {
955: case '[':
1.114 paf 956: PC.ls=LS_METHOD_SQUARE;
1.1 paf 957: lexical_brackets_nestage=1;
1.48 paf 958: RC;
959: case '{':
1.114 paf 960: PC.ls=LS_METHOD_CURLY;
1.1 paf 961: lexical_brackets_nestage=1;
1.48 paf 962: RC;
1.69 paf 963: case '(':
1.114 paf 964: PC.ls=LS_METHOD_ROUND;
1.69 paf 965: lexical_brackets_nestage=1;
966: RC;
1.48 paf 967: case '.': // name part delim
968: case '$': // name part subvar
969: case ':': // ':name' or 'class:name'
970: RC;
1.1 paf 971: }
972: break;
1.48 paf 973:
974: case LS_METHOD_SQUARE:
975: switch(c) {
976: case '$':
1.10 paf 977: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 978: RC;
979: case '^':
1.10 paf 980: push_LS(PC, LS_METHOD_NAME);
1.48 paf 981: RC;
982: case ';': // param delim
983: RC;
984: case ']':
1.1 paf 985: if(--lexical_brackets_nestage==0) {
1.114 paf 986: PC.ls=LS_METHOD_AFTER;
1.48 paf 987: RC;
1.1 paf 988: }
1.48 paf 989: break;
990: case '[':
1.1 paf 991: lexical_brackets_nestage++;
1.48 paf 992: break;
993: }
1.1 paf 994: break;
1.48 paf 995:
1.1 paf 996: case LS_METHOD_CURLY:
1.48 paf 997: switch(c) {
998: case '$':
1.10 paf 999: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 1000: RC;
1001: case '^':
1.10 paf 1002: push_LS(PC, LS_METHOD_NAME);
1.94 paf 1003: RC;
1004: case ';': // param delim
1.48 paf 1005: RC;
1006: case '}':
1.1 paf 1007: if(--lexical_brackets_nestage==0) {
1.114 paf 1008: PC.ls=LS_METHOD_AFTER;
1.48 paf 1009: RC;
1.1 paf 1010: }
1.48 paf 1011: break;
1012: case '{':
1.1 paf 1013: lexical_brackets_nestage++;
1.48 paf 1014: break;
1015: }
1.1 paf 1016: break;
1.48 paf 1017:
1.1 paf 1018: case LS_METHOD_AFTER:
1.69 paf 1019: if(c=='[') {/* ][ }[ )[ */
1.114 paf 1020: PC.ls=LS_METHOD_SQUARE;
1.1 paf 1021: lexical_brackets_nestage=1;
1.48 paf 1022: RC;
1.1 paf 1023: }
1.69 paf 1024: if(c=='{') {/* ]{ }{ ){ */
1.114 paf 1025: PC.ls=LS_METHOD_CURLY;
1.69 paf 1026: lexical_brackets_nestage=1;
1027: RC;
1028: }
1029: if(c=='(') {/* ]( }( )( */
1.114 paf 1030: PC.ls=LS_METHOD_ROUND;
1.1 paf 1031: lexical_brackets_nestage=1;
1.48 paf 1032: RC;
1.1 paf 1033: }
1034: pop_LS(PC);
1.114 paf 1035: PC.source--; if(--PC.col<0) { PC.line--; PC.col=-1; }
1.13 paf 1036: result=EON;
1.1 paf 1037: goto break2;
1038: }
1.9 paf 1039: if(c==0) {
1.1 paf 1040: result=-1;
1041: break;
1042: }
1043: }
1044:
1045: break2:
1.59 paf 1046: if(end!=begin) { // there is last piece?
1047: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
1048: // strip last \n
1.10 paf 1049: end--;
1.59 paf 1050: }
1051: if(end!=begin) { // last piece still alive?
1052: // append it
1.114 paf 1053: PC.string->APPEND(begin, end-begin, PC.file, begin_line/*, start_col*/);
1.30 paf 1054: }
1.59 paf 1055: }
1.114 paf 1056: if(PC.string->size()) { // something accumulated?
1.17 paf 1057: // create STRING value: array of OP_VALUE+vstring
1.114 paf 1058: *lvalp=VL(NEW VString(*PC.string));
1.10 paf 1059: // new pieces storage
1.114 paf 1060: PC.string=NEW String(POOL);
1.58 paf 1061: // make current result be pending for next call, return STRING for now
1.114 paf 1062: PC.pending_state=result; result=STRING;
1.58 paf 1063: }
1.67 paf 1064: if(skip_analized) {
1.114 paf 1065: PC.source+=skip_analized; PC.col+=skip_analized;
1.1 paf 1066: }
1.58 paf 1067: return result;
1.1 paf 1068: }
1069:
1.110 paf 1070: static int real_yyerror(parse_control *pc, char *s) { // Called by yyparse on error
1.114 paf 1071: strncpy(PC.error, s, MAX_STRING);
1.1 paf 1072: return 1;
1.110 paf 1073: }
1.1 paf 1074:
1.110 paf 1075: static void yyprint(FILE *file, int type, YYSTYPE value) {
1076: if(type==STRING)
1077: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1078: }
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