Annotation of parser3/src/main/compile.y, revision 1.106
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:
1.106 ! paf 8: $Id: compile.y,v 1.105 2001/03/19 16:44:01 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:
31: #include <stdio.h>
32: #include <string.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)
1.105 paf 55: #ifndef DOXYGEN_SHOULD_SKIP_THIS
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) {
1.34 paf 158: for(int i=0; i<strings_code->size(); i+=2) {
1.82 paf 159: String file(*SLA2S(strings_code, i));
160: file.APPEND_CONST(".p");
1.91 paf 161: PC->request->use_file(file.cstr());
1.34 paf 162: }
1.74 paf 163: } else if(command==BASE_NAME) {
1.104 paf 164: if(PC->cclass->base()!=&PC->request->ROOT) { // already changed from default?
1.86 paf 165: strcpy(PC->error, "class already have a base '");
1.91 paf 166: strncat(PC->error, PC->cclass->base()->name().cstr(), 100);
1.86 paf 167: strcat(PC->error, "'");
1.73 paf 168: YYERROR;
169: }
1.45 paf 170: if(strings_code->size()==1*2) {
1.73 paf 171: // TODO: преодолеть self и циклические base
1.82 paf 172: const String& base_name=*SLA2S(strings_code);
1.45 paf 173: VClass *base=static_cast<VClass *>(
174: PC->request->classes().get(base_name));
175: if(!base) {
176: strcpy(PC->error, base_name.cstr());
177: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.34 paf 178: YYERROR;
179: }
1.91 paf 180: PC->cclass->set_base(*base);
1.45 paf 181: } else {
182: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
183: YYERROR;
1.34 paf 184: }
185: } else {
1.92 paf 186: strcpy(PC->error, "'");
1.93 paf 187: strncat(PC->error, command.cstr(), MAX_STRING/2);
1.92 paf 188: strcat(PC->error, "' invalid special name. valid names are "
189: "'"CLASS_NAME"', '"USE_CONTROL_METHOD_NAME"' and '"BASE_NAME"'");
1.34 paf 190: YYERROR;
191: }
192: }
193: };
1.37 paf 194: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
195: control_string: maybe_string '\n';
196: maybe_string: empty | STRING;
1.34 paf 197:
198: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 199: maybe_codes {
1.38 paf 200: const String *name=SLA2S($2);
1.10 paf 201:
202: YYSTYPE params_names_code=$3;
1.75 paf 203: Array *params_names=0;
204: if(int size=params_names_code->size()) {
205: params_names=NEW Array(POOL);
206: for(int i=0; i<size; i+=2)
207: *params_names+=SLA2S(params_names_code, i);
208: }
1.10 paf 209:
210: YYSTYPE locals_names_code=$4;
1.75 paf 211: Array *locals_names=0;
212: if(int size=locals_names_code->size()) {
213: locals_names=NEW Array(POOL);
214: for(int i=0; i<size; i+=2)
215: *locals_names+=SLA2S(locals_names_code, i);
216: }
1.10 paf 217:
1.76 paf 218: Method& method=*NEW Method(POOL,
219: *name,
1.81 paf 220: 0, 0/*min,max numbered_params_count*/,
1.76 paf 221: params_names, locals_names,
222: $7, 0);
1.91 paf 223: PC->cclass->add_method(*name, method);
1.8 paf 224: };
1.10 paf 225:
226: maybe_bracketed_strings: empty | bracketed_maybe_strings;
227: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
228: maybe_strings: empty | strings;
229: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
230:
231: maybe_comment: empty | STRING;
1.1 paf 232:
233: /* codes */
234:
1.10 paf 235: maybe_codes: empty | codes;
236:
1.90 paf 237: codes: code | codes code { $$=$1; P($$, $2) };
1.81 paf 238: code: write_string | action;
1.1 paf 239: action: get | put | with | call;
240:
241: /* get */
242:
1.64 paf 243: get: get_value {
244: $$=$1; /* stack: resulting value */
1.102 paf 245: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.1 paf 246: };
1.64 paf 247: get_value: '$' get_name_value { $$=$2 }
248: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 249: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 250: name_without_curly_rdive:
251: name_without_curly_rdive_read
252: | name_without_curly_rdive_root
253: | name_without_curly_rdive_class;
1.19 paf 254: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 255: $$=N(POOL);
1.22 paf 256: Array *diving_code=$1;
1.82 paf 257: const String *first_name=SLA2S(diving_code);
1.85 paf 258: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 259: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 260: P($$, diving_code,
261: /* skip over... */
262: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
263: } else {
1.54 paf 264: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 265: P($$, diving_code);
266: }
267: /* diving code; stack: current context */
1.1 paf 268: };
1.19 paf 269: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 270: $$=N(POOL);
1.54 paf 271: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 272: P($$, $2); /* diving code; stack: current context */
273: };
1.44 paf 274: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 275: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 276:
277: /* put */
278:
1.81 paf 279: put: '$' name_expr_wdive construct {
1.20 paf 280: $$=$2; /* stack: context,name */
1.52 paf 281: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 282: };
1.44 paf 283: name_expr_wdive:
284: name_expr_wdive_write
285: | name_expr_wdive_root
286: | name_expr_wdive_class;
1.28 paf 287: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 288: $$=N(POOL);
1.23 paf 289: Array *diving_code=$1;
1.82 paf 290: const String *first_name=SLA2S(diving_code);
1.85 paf 291: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 292: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 293: P($$, diving_code,
294: /* skip over... */
295: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
296: } else {
1.54 paf 297: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 298: P($$, diving_code);
299: }
300: /* diving code; stack: current context */
1.20 paf 301: };
1.28 paf 302: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 303: $$=N(POOL);
1.54 paf 304: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 305: P($$, $2); /* diving code; stack: context,name */
1.1 paf 306: };
1.44 paf 307: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 308:
1.81 paf 309: construct: construct_by_code | construct_by_expr;
310: construct_by_code: '[' any_constructor_code_value ']' {
311: $$=$2; /* stack: context, name, value */
312: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
313: }
314: ;
1.90 paf 315: construct_by_expr: '(' expr_value ')' {
1.81 paf 316: $$=$2; /* stack: context, name, value */
317: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
318: }
1.52 paf 319: ;
1.55 paf 320: any_constructor_code_value:
321: empty_string_value /* optimized $var[] case */
1.52 paf 322: | STRING /* optimized $var[STRING] case */
1.55 paf 323: | constructor_code_value /* $var[something complex] */
1.1 paf 324: ;
1.55 paf 325: constructor_code_value: constructor_code {
1.25 paf 326: $$=N(POOL);
1.54 paf 327: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 328: P($$, $1); /* some code that writes to that context */
1.54 paf 329: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 330: };
1.55 paf 331: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 332: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
333:
1.1 paf 334: /* call */
335:
1.66 paf 336: call: call_value {
337: $$=$1; /* stack: value */
1.102 paf 338: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.66 paf 339: };
340: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 341: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 342: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 343: P($$, $3); /* filling method_frame.store_params */
1.66 paf 344: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 345: };
346:
1.43 paf 347: call_name: name_without_curly_rdive;
1.38 paf 348:
1.9 paf 349: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 350: store_param:
351: store_square_param
352: | store_round_param
353: | store_curly_param
1.31 paf 354: ;
1.69 paf 355: store_square_param: '[' store_code_param_parts ']' {$$=$2};
356: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.94 paf 357: store_curly_param: '{' store_curly_param_parts '}' {$$=$2};
1.69 paf 358: store_code_param_parts:
359: store_code_param_part
360: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
361: ;
362: store_expr_param_parts:
363: store_expr_param_part
364: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
365: ;
1.94 paf 366: store_curly_param_parts:
367: store_curly_param_part
368: | store_curly_param_parts ';' store_curly_param_part { $$=$1; P($$, $3) }
369: ;
1.69 paf 370: store_code_param_part:
1.78 paf 371: empty /* optimized [] case */
372: | STRING { /* optimized [STRING] case */
1.32 paf 373: $$=$1;
1.54 paf 374: O($$, OP_STORE_PARAM);
1.32 paf 375: }
1.78 paf 376: | constructor_code_value { /* [something complex] */
1.32 paf 377: $$=$1;
1.77 paf 378: O($$, OP_STORE_PARAM);
1.32 paf 379: }
380: ;
1.69 paf 381: store_expr_param_part: write_expr_value {
382: $$=N(POOL);
1.103 paf 383: PEA($$, $1);
1.69 paf 384: };
1.94 paf 385: store_curly_param_part: maybe_codes {
386: $$=N(POOL);
387: PCA($$, $1);
388: };
1.90 paf 389: write_expr_value: expr_value {
1.69 paf 390: $$=$1;
1.102 paf 391: O($$, OP_WRITE_EXPR_RESULT);
1.69 paf 392: };
1.1 paf 393:
394: /* name */
395:
1.20 paf 396: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 397:
1.9 paf 398: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 399: name_step: name_advance1 '.';
400: name_advance1: name_expr_value {
401: /* stack: context */
402: $$=$1; /* stack: context,name */
1.54 paf 403: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 404: };
405: name_advance2: name_expr_value {
406: /* stack: context */
407: $$=$1; /* stack: context,name */
1.54 paf 408: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 409: }
1.4 paf 410: | STRING BOGUS
1.1 paf 411: ;
412: name_expr_value:
1.4 paf 413: STRING /* subname_is_const */
1.1 paf 414: | name_expr_subvar_value /* $subname_is_var_value */
415: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
416: ;
417: name_expr_subvar_value: '$' subvar_ref_name_rdive {
418: $$=$2;
1.54 paf 419: O($$, OP_GET_ELEMENT);
1.1 paf 420: };
1.4 paf 421: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 422: $$=N(POOL);
1.54 paf 423: O($$, OP_CREATE_EWPOOL);
1.9 paf 424: P($$, $1);
1.102 paf 425: O($$, OP_WRITE_VALUE);
1.9 paf 426: P($$, $2);
1.54 paf 427: O($$, OP_REDUCE_EWPOOL);
1.1 paf 428: };
1.18 paf 429: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
430: subvar_ref_name_rdive_read: STRING {
1.25 paf 431: $$=N(POOL);
1.54 paf 432: O($$, OP_WITH_READ);
1.9 paf 433: P($$, $1);
1.1 paf 434: };
1.18 paf 435: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 436: $$=N(POOL);
1.54 paf 437: O($$, OP_WITH_ROOT);
1.18 paf 438: P($$, $2);
439: };
1.9 paf 440: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 441: subvar__get_write: '$' subvar_ref_name_rdive {
442: $$=$2;
1.54 paf 443: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 444: };
445:
1.44 paf 446: class_prefix: STRING ':' {
1.72 paf 447: $$=$1; // stack: class name string
448: O($$, OP_GET_CLASS);
1.1 paf 449: };
450:
451:
452: /* with */
453:
454: with: '$' name_without_curly_rdive '{' codes '}' {
455: $$=$2;
1.54 paf 456: O($$, OP_CREATE_RWPOOL);
1.9 paf 457: P($$, $4);
1.54 paf 458: O($$, OP_REDUCE_RWPOOL);
1.102 paf 459: O($$, OP_WRITE_VALUE);
1.1 paf 460: };
1.53 paf 461:
1.56 paf 462: /* expr */
1.53 paf 463:
1.81 paf 464: expr_value: expr {
465: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 466: change_string_literal_to_double_literal($$); // make that string literal Double
467: };
1.56 paf 468: expr:
1.62 paf 469: STRING
1.64 paf 470: | get_value
1.66 paf 471: | call_value
1.64 paf 472: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 473: | '(' expr ')' { $$ = $2; }
474: /* stack: operand // stack: @operand */
475: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 476: | '~' expr { $$=$2; O($$, OP_INV) }
477: | '!' expr { $$=$2; O($$, OP_NOT) }
478: | "def" expr { $$=$2; O($$, OP_DEF) }
479: | "in" expr { $$=$2; O($$, OP_IN) }
480: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 481: /* stack: a,b // stack: a@b */
482: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
483: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
484: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
485: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
486: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
487: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
488: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
489: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
490: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
491: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
492: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
493: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
494: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
495: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
496: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
497: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
498: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 499: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
500: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
501: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
502: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
503: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
504: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.95 paf 505: | expr "is" expr { $$=$1; P($$, $3); O($$, OP_IS) }
1.56 paf 506: ;
1.55 paf 507:
1.65 paf 508: string_inside_quotes_value: maybe_codes {
1.64 paf 509: $$=N(POOL);
510: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 511: P($$, $1); /* some code that writes to that context */
1.64 paf 512: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 513: };
1.1 paf 514:
1.27 paf 515: /* basics */
1.1 paf 516:
1.81 paf 517: write_string: STRING {
1.102 paf 518: // optimized from OP_STRING+OP_WRITE_VALUE to OP_STRING__WRITE
1.84 paf 519: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 520: };
521:
1.81 paf 522: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 523: empty: /* empty */ { $$=N(POOL) };
1.1 paf 524:
525: %%
1.105 paf 526: #endif
1.1 paf 527:
528: /*
529: 000$111(2222)00
530: 000$111{3333}00
1.9 paf 531: $,^: push,=0
1.1 paf 532: 1:( { break=pop
533: 2:( ) pop
534: 3:{ } pop
535:
536: 000^111(2222)4444{33333}4000
1.9 paf 537: $,^: push,=0
1.1 paf 538: 1:( { break=pop
539: 2:( )=4
540: 3:{ }=4
541: 4:[^({]=pop
542: */
543:
544: int yylex(YYSTYPE *lvalp, void *pc) {
545: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 546: #define RC {result=c; goto break2; }
1.1 paf 547:
548: register int c;
549: int result;
550:
551: if(PC->pending_state) {
552: result=PC->pending_state;
553: PC->pending_state=0;
554: return result;
555: }
556:
1.91 paf 557: const char *begin=PC->source;
558: const char *end;
1.9 paf 559: int begin_line=PC->line;
1.67 paf 560: int skip_analized=0;
1.50 paf 561: while(true) {
1.9 paf 562: c=*(end=(PC->source++));
1.1 paf 563:
1.4 paf 564: if(c=='\n') {
1.1 paf 565: PC->line++;
1.8 paf 566: PC->col=0;
1.10 paf 567: } else
1.4 paf 568: PC->col++;
1.73 paf 569:
570: // todo: # in 0+1 column comment
1.1 paf 571:
1.48 paf 572: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
573: if(c=='^')
574: switch(*PC->source) {
575: case '^': case '$': case ';':
576: case '[': case ']':
577: case '{': case '}':
578: case '"':
1.40 paf 579: if(end!=begin) {
580: // append piece till ^
581: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
582: }
1.63 paf 583: // reset piece 'begin' position & line
1.40 paf 584: begin=PC->source; // ^
1.9 paf 585: begin_line=PC->line;
1.40 paf 586: // skip over ^ and _
1.50 paf 587: PC->source++; PC->col++;
1.40 paf 588: // skip analysis = forced literal
1.1 paf 589: continue;
590: }
591: switch(PC->ls) {
1.10 paf 592:
593: // USER'S = NOT OURS
1.1 paf 594: case LS_USER:
1.48 paf 595: switch(c) {
596: case '$':
1.10 paf 597: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 598: RC;
599: case '^':
600: push_LS(PC, LS_METHOD_NAME);
601: RC;
602: case '@':
603: if(PC->col==0+1) {
604: push_LS(PC, LS_DEF_NAME);
605: RC;
606: }
607: break;
1.1 paf 608: }
1.48 paf 609: break;
610:
611: // STRING IN EXPRESSION
612: case LS_EXPRESSION_STRING:
613: switch(c) {
614: case '"':
615: pop_LS(PC); //"abc".
616: RC;
617: case '$':
618: push_LS(PC, LS_VAR_NAME_SIMPLE);
619: RC;
620: case '^':
1.10 paf 621: push_LS(PC, LS_METHOD_NAME);
1.48 paf 622: RC;
1.10 paf 623: }
624: break;
625:
626: // METHOD DEFINITION
627: case LS_DEF_NAME:
1.48 paf 628: switch(c) {
629: case '[':
1.10 paf 630: PC->ls=LS_DEF_PARAMS;
1.48 paf 631: RC;
632: case '\n':
633: PC->ls=LS_DEF_SPECIAL_BODY;
634: RC;
1.10 paf 635: }
636: break;
1.48 paf 637:
1.10 paf 638: case LS_DEF_PARAMS:
1.48 paf 639: switch(c) {
640: case ';':
641: RC;
642: case ']':
1.10 paf 643: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 644: RC;
1.49 paf 645: case '\n': // wrong. bailing out
1.10 paf 646: pop_LS(PC);
1.48 paf 647: RC;
1.10 paf 648: }
649: break;
1.48 paf 650:
1.10 paf 651: case LS_DEF_LOCALS:
1.48 paf 652: switch(c) {
653: case '[':
654: case ';':
655: RC;
656: case ']':
1.10 paf 657: PC->ls=LS_DEF_COMMENT;
1.48 paf 658: RC;
659: case '\n': // wrong. bailing out
1.10 paf 660: pop_LS(PC);
1.48 paf 661: RC;
1.10 paf 662: }
663: break;
1.48 paf 664:
1.10 paf 665: case LS_DEF_COMMENT:
666: if(c=='\n') {
667: pop_LS(PC);
1.48 paf 668: RC;
1.37 paf 669: }
670: break;
671:
1.48 paf 672: case LS_DEF_SPECIAL_BODY:
1.37 paf 673: if(c=='\n') {
1.48 paf 674: switch(*PC->source) {
675: case '@': case 0: // end of special_code
1.37 paf 676: pop_LS(PC);
1.48 paf 677: break;
678: }
679: RC;
680: }
681: break;
682:
683: // (EXPRESSION)
1.69 paf 684: case LS_VAR_ROUND:
685: case LS_METHOD_ROUND:
1.48 paf 686: switch(c) {
687: case ')':
688: if(--lexical_brackets_nestage==0)
1.69 paf 689: if(PC->ls==LS_METHOD_ROUND) // method round param ended
690: PC->ls=LS_METHOD_AFTER; // look for method end
691: else // PC->ls==LS_VAR_ROUND // variable constructor ended
692: pop_LS(PC); // return to normal life
1.48 paf 693: RC;
694: case '$':
1.69 paf 695: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 696: RC;
697: case '^':
698: push_LS(PC, LS_METHOD_NAME);
699: RC;
700: case '(':
701: lexical_brackets_nestage++;
702: RC;
1.67 paf 703: case '-':
704: if(*PC->source=='f') { // -f
705: skip_analized=1;
706: result=FEXISTS;
707: } else
708: result=c;
709: goto break2;
710: case '+': case '*': case '/': case '%':
1.58 paf 711: case '~':
1.48 paf 712: case ';':
713: RC;
1.59 paf 714: case '&': case '|': case '#':
1.58 paf 715: if(*PC->source==c) { // && ||
1.59 paf 716: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 717: skip_analized=1;
1.58 paf 718: } else
719: result=c;
720: goto break2;
721: case '<': case '>': case '=': case '!':
722: if(*PC->source=='=') { // <= >= == !=
1.67 paf 723: skip_analized=1;
1.58 paf 724: switch(c) {
725: case '<': result=NLE; break;
726: case '>': result=NGE; break;
727: case '=': result=NEQ; break;
728: case '!': result=NNE; break;
729: }
730: } else
731: result=c;
732: goto break2;
1.48 paf 733: case '"':
734: push_LS(PC, LS_EXPRESSION_STRING);
735: RC;
1.50 paf 736: case 'l': case 'g': case 'e': case 'n':
1.51 paf 737: if(end==begin) // right after whitespace
1.58 paf 738: switch(*PC->source) {
1.51 paf 739: // case '?': // ok [and bad cases, yacc would bark at them]
740: case 't': // lt gt [et nt]
1.62 paf 741: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 742: skip_analized=1;
1.58 paf 743: goto break2;
1.51 paf 744: case 'e': // le ge ne [ee]
1.58 paf 745: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 746: skip_analized=1;
1.58 paf 747: goto break2;
1.51 paf 748: case 'q': // eq [lq gq nq]
1.58 paf 749: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 750: skip_analized=1;
751: goto break2;
752: }
753: break;
754: case 'i':
755: if(end==begin) // right after whitespace
1.95 paf 756: switch(PC->source[0]) {
757: case 'n':
758: { // in
759: skip_analized=1;
760: result=IN;
761: goto break2;
762: }
763: case 's':
764: { // is
765: skip_analized=1;
766: result=IS;
767: goto break2;
768: }
1.67 paf 769: }
770: break;
771: case 'd':
772: if(end==begin) // right after whitespace
773: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
774: skip_analized=2;
775: result=DEF;
1.58 paf 776: goto break2;
1.50 paf 777: }
1.48 paf 778: break;
779: case ' ': case '\t': case '\n':
1.63 paf 780: if(end!=begin) { // there were a string after previous operator?
781: result=0; // return that string
782: goto break2;
1.48 paf 783: }
1.63 paf 784: // that's a leading|traling space or after-operator-space
785: // ignoring it
786: // reset piece 'begin' position & line
1.58 paf 787: begin=PC->source; // after whitespace char
1.48 paf 788: begin_line=PC->line;
789: continue;
1.1 paf 790: }
791: break;
792:
1.10 paf 793: // VARIABLE GET/PUT/WITH
1.1 paf 794: case LS_VAR_NAME_SIMPLE:
1.69 paf 795: case LS_EXPRESSION_VAR_NAME:
796: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 797: // name in expr ends also before binary operators
1.48 paf 798: switch(c) {
1.92 paf 799: case '-':
1.48 paf 800: pop_LS(PC);
801: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
802: result=EON;
803: goto break2;
804: }
805: }
806: switch(c) {
807: case 0:
808: case ' ': case '\t': case '\n':
809: case ';':
1.64 paf 810: case ']': case '}': case ')': case '"':
1.83 paf 811: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 812: case '+': case '*': case '/': case '%':
813: case '&': case '|':
814: case '=': case '!':
1.99 paf 815: // common delimiters
1.101 paf 816: case '\'': case ',':
1.1 paf 817: pop_LS(PC);
1.32 paf 818: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 819: result=EON;
1.1 paf 820: goto break2;
1.48 paf 821: case '[':
822: PC->ls=LS_VAR_SQUARE;
1.1 paf 823: lexical_brackets_nestage=1;
1.48 paf 824: RC;
825: case '{':
826: if(begin==end) { // ${name}, no need of EON, switching LS
827: PC->ls=LS_VAR_NAME_CURLY;
828: } else {
829: PC->ls=LS_VAR_CURLY;
830: lexical_brackets_nestage=1;
831: }
1.69 paf 832:
1.48 paf 833: RC;
834: case '(':
1.69 paf 835: PC->ls=LS_VAR_ROUND;
1.1 paf 836: lexical_brackets_nestage=1;
1.48 paf 837: RC;
838: case '.': // name part delim
839: case '$': // name part subvar
840: case ':': // ':name' or 'class:name'
841: RC;
1.1 paf 842: }
843: break;
1.48 paf 844:
1.1 paf 845: case LS_VAR_NAME_CURLY:
1.48 paf 846: switch(c) {
847: case '}': // ${name} finished, restoring LS
1.1 paf 848: pop_LS(PC);
1.48 paf 849: RC;
850: case '.': // name part delim
851: case '$': // name part subvar
852: case ':': // ':name' or 'class:name'
853: RC;
1.1 paf 854: }
855: break;
1.48 paf 856:
857: case LS_VAR_SQUARE:
858: switch(c) {
859: case '$':
1.10 paf 860: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 861: RC;
862: case '^':
1.10 paf 863: push_LS(PC, LS_METHOD_NAME);
1.48 paf 864: RC;
865: case ']':
1.1 paf 866: if(--lexical_brackets_nestage==0) {
867: pop_LS(PC);
1.48 paf 868: RC;
1.1 paf 869: }
1.48 paf 870: break;
871: case ';': // operator_or_fmt;value delim
872: RC;
873: case '[':
874: lexical_brackets_nestage++;
875: break;
1.1 paf 876: }
877: break;
1.48 paf 878:
1.1 paf 879: case LS_VAR_CURLY:
1.48 paf 880: switch(c) {
881: case '$':
1.10 paf 882: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 883: RC;
884: case '^':
1.10 paf 885: push_LS(PC, LS_METHOD_NAME);
1.48 paf 886: RC;
887: case '}':
1.1 paf 888: if(--lexical_brackets_nestage==0) {
889: pop_LS(PC);
1.48 paf 890: RC;
1.1 paf 891: }
1.48 paf 892: break;
893: case '{':
1.1 paf 894: lexical_brackets_nestage++;
1.48 paf 895: break;
896: }
1.1 paf 897: break;
898:
1.10 paf 899: // METHOD CALL
1.1 paf 900: case LS_METHOD_NAME:
1.48 paf 901: switch(c) {
902: case '[':
903: PC->ls=LS_METHOD_SQUARE;
1.1 paf 904: lexical_brackets_nestage=1;
1.48 paf 905: RC;
906: case '{':
1.1 paf 907: PC->ls=LS_METHOD_CURLY;
908: lexical_brackets_nestage=1;
1.48 paf 909: RC;
1.69 paf 910: case '(':
911: PC->ls=LS_METHOD_ROUND;
912: lexical_brackets_nestage=1;
913: RC;
1.48 paf 914: case '.': // name part delim
915: case '$': // name part subvar
916: case ':': // ':name' or 'class:name'
917: RC;
1.1 paf 918: }
919: break;
1.48 paf 920:
921: case LS_METHOD_SQUARE:
922: switch(c) {
923: case '$':
1.10 paf 924: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 925: RC;
926: case '^':
1.10 paf 927: push_LS(PC, LS_METHOD_NAME);
1.48 paf 928: RC;
929: case ';': // param delim
930: RC;
931: case ']':
1.1 paf 932: if(--lexical_brackets_nestage==0) {
933: PC->ls=LS_METHOD_AFTER;
1.48 paf 934: RC;
1.1 paf 935: }
1.48 paf 936: break;
937: case '[':
1.1 paf 938: lexical_brackets_nestage++;
1.48 paf 939: break;
940: }
1.1 paf 941: break;
1.48 paf 942:
1.1 paf 943: case LS_METHOD_CURLY:
1.48 paf 944: switch(c) {
945: case '$':
1.10 paf 946: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 947: RC;
948: case '^':
1.10 paf 949: push_LS(PC, LS_METHOD_NAME);
1.94 paf 950: RC;
951: case ';': // param delim
1.48 paf 952: RC;
953: case '}':
1.1 paf 954: if(--lexical_brackets_nestage==0) {
955: PC->ls=LS_METHOD_AFTER;
1.48 paf 956: RC;
1.1 paf 957: }
1.48 paf 958: break;
959: case '{':
1.1 paf 960: lexical_brackets_nestage++;
1.48 paf 961: break;
962: }
1.1 paf 963: break;
1.48 paf 964:
1.1 paf 965: case LS_METHOD_AFTER:
1.69 paf 966: if(c=='[') {/* ][ }[ )[ */
1.48 paf 967: PC->ls=LS_METHOD_SQUARE;
1.1 paf 968: lexical_brackets_nestage=1;
1.48 paf 969: RC;
1.1 paf 970: }
1.69 paf 971: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 972: PC->ls=LS_METHOD_CURLY;
1.69 paf 973: lexical_brackets_nestage=1;
974: RC;
975: }
976: if(c=='(') {/* ]( }( )( */
977: PC->ls=LS_METHOD_ROUND;
1.1 paf 978: lexical_brackets_nestage=1;
1.48 paf 979: RC;
1.1 paf 980: }
981: pop_LS(PC);
1.32 paf 982: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 983: result=EON;
1.1 paf 984: goto break2;
985: }
1.9 paf 986: if(c==0) {
1.1 paf 987: result=-1;
988: break;
989: }
990: }
991:
992: break2:
1.59 paf 993: if(end!=begin) { // there is last piece?
994: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
995: // strip last \n
1.10 paf 996: end--;
1.59 paf 997: }
998: if(end!=begin) { // last piece still alive?
999: // append it
1.30 paf 1000: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
1001: }
1.59 paf 1002: }
1003: if(PC->string->size()) { // something accumulated?
1.17 paf 1004: // create STRING value: array of OP_VALUE+vstring
1.55 paf 1005: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 1006: // new pieces storage
1.25 paf 1007: PC->string=NEW String(POOL);
1.58 paf 1008: // make current result be pending for next call, return STRING for now
1009: PC->pending_state=result; result=STRING;
1010: }
1.67 paf 1011: if(skip_analized) {
1012: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 1013: }
1.58 paf 1014: return result;
1.1 paf 1015: }
1016:
1.9 paf 1017: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 1018: {
1.46 paf 1019: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 1020: return 1;
1021: }
1022:
1023: static void
1.9 paf 1024: yyprint(
1.1 paf 1025: FILE *file,
1026: int type,
1027: YYSTYPE value)
1028: {
1.9 paf 1029: if(type==STRING)
1.38 paf 1030: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 1031: }
1032:
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