Annotation of parser3/src/main/compile.y, revision 1.105
1.105 ! paf 1: /** @file
1.87 paf 2: Parser
3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.89 paf 4: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.87 paf 5:
1.105 ! paf 6: $Id: compile.y,v 1.104 2001/03/18 11:37:52 paf Exp $
1.88 paf 7: */
8:
9: /*
10: TODO.parser4:
11: cache compiled code from request to request. to do that...
12: 1: make method definitions, @CLASS, @BASE, @USE instructions,
13: which would be executed afterwards, and actions
14: now performed at compile time would be delayed to run time.
15: 2: make cache expiration on time and on disk-change of class source
16: 3: in apache use subpools for compiled class storage
17: 4: in iis make up specialized Pool object for that
1.24 paf 18: */
19:
1.1 paf 20: %{
1.90 paf 21: #define YYSTYPE Array/*<Operation>*/ *
1.9 paf 22: #define YYPARSE_PARAM pc
23: #define YYLEX_PARAM pc
24: #define YYDEBUG 1
1.1 paf 25: #define YYERROR_VERBOSE
1.9 paf 26: #define yyerror(msg) real_yyerror((parse_control *)pc, msg)
27: #define YYPRINT(file, type, value) yyprint(file, type, value)
1.1 paf 28:
29: #include <stdio.h>
30: #include <string.h>
31: #include <stdlib.h>
32:
33: #include "compile_tools.h"
1.8 paf 34: #include "pa_value.h"
1.12 paf 35: #include "pa_request.h"
1.39 paf 36: #include "pa_vobject.h"
1.52 paf 37: #include "pa_vdouble.h"
1.98 paf 38: #include "pa_globals.h"
1.39 paf 39:
1.85 paf 40: #define SELF_ELEMENT_NAME "self"
1.97 paf 41: #define USE_CONTROL_METHOD_NAME "USE"
1.1 paf 42:
1.9 paf 43: int real_yyerror(parse_control *pc, char *s);
44: static void yyprint(FILE *file, int type, YYSTYPE value);
1.1 paf 45: int yylex(YYSTYPE *lvalp, void *pc);
46:
47:
1.8 paf 48: // local convinient inplace typecast & var
1.9 paf 49: #define PC ((parse_control *)pc)
1.25 paf 50: #define POOL *PC->pool
51: #undef NEW
52: #define NEW new(POOL)
1.105 ! paf 53: #ifndef DOXYGEN_SHOULD_SKIP_THIS
1.1 paf 54: %}
55:
56: %pure_parser
57:
1.13 paf 58: %token EON
1.4 paf 59: %token STRING
1.1 paf 60: %token BOGUS
1.55 paf 61:
1.58 paf 62: %token BAD_STRING_COMPARISON_OPERATOR
63:
1.59 paf 64: %token LAND "&&"
1.58 paf 65: %token LOR "||"
1.59 paf 66: %token LXOR "##"
1.58 paf 67:
68: %token NLE "<="
69: %token NGE ">="
70: %token NEQ "=="
71: %token NNE "!="
72:
73: %token SLT "lt"
74: %token SGT "gt"
75: %token SLE "le"
76: %token SGE "ge"
77: %token SEQ "eq"
78: %token SNE "ne"
79:
1.67 paf 80: %token DEF "def"
81: %token IN "in"
82: %token FEXISTS "-f"
1.95 paf 83: %token IS "is"
1.67 paf 84:
1.57 paf 85: /* logical */
1.95 paf 86: %left "is"
1.61 paf 87: %left "lt" "gt" "le" "ge"
88: %left "eq" "ne"
1.59 paf 89: %left '<' '>' "<=" ">=" "##"
1.57 paf 90: %left "==" "!="
91: %left "||"
92: %left "&&"
1.67 paf 93: %left "def" "in" "-f"
1.68 paf 94: %left '!'
1.57 paf 95:
96: /* bitwise */
1.59 paf 97: %left '#'
1.57 paf 98: %left '&' '|'
1.68 paf 99: %left '~'
1.57 paf 100:
1.56 paf 101: /* numerical */
1.55 paf 102: %left '-' '+'
1.57 paf 103: %left '*' '/' '%'
1.56 paf 104: %left NEG /* negation: unary - */
1.1 paf 105:
106: %%
1.88 paf 107: all:
1.10 paf 108: one_big_piece {
1.75 paf 109: Method& method=*NEW Method(POOL,
1.85 paf 110: *main_method_name,
1.81 paf 111: 0, 0, /*min, max numbered_params_count*/
1.75 paf 112: 0/*param_names*/, 0/*local_names*/,
113: $1/*parser_code*/, 0/*native_code*/);
1.91 paf 114: PC->cclass->add_method(*main_method_name, method);
1.10 paf 115: }
116: | methods;
117:
118: methods: method | methods method;
119: one_big_piece: maybe_codes;
120:
1.34 paf 121: method: control_method | code_method;
122:
123: control_method: '@' STRING '\n'
124: control_strings {
1.82 paf 125: const String& command=*SLA2S($2);
1.34 paf 126: YYSTYPE strings_code=$4;
1.37 paf 127: if(strings_code->size()<1*2) {
128: strcpy(PC->error, "@");
1.74 paf 129: strcat(PC->error, command.cstr());
1.37 paf 130: strcat(PC->error, " is empty");
131: YYERROR;
132: }
1.74 paf 133: if(command==CLASS_NAME) {
1.104 paf 134: if(PC->cclass!=&PC->request->ROOT) { // already changed from default?
1.73 paf 135: strcpy(PC->error, "class already have a name '");
1.91 paf 136: strncat(PC->error, PC->cclass->name().cstr(), 100);
1.73 paf 137: strcat(PC->error, "'");
138: YYERROR;
139: }
140: if(strings_code->size()==1*2) {
141: // new class' name
1.82 paf 142: const String *name=SLA2S(strings_code);
1.73 paf 143: // creating the class
1.91 paf 144: PC->cclass=NEW VClass(POOL);
145: PC->cclass->set_name(*name);
1.73 paf 146: // defaulting base. may change with @BASE
1.104 paf 147: PC->cclass->set_base(PC->request->ROOT);
1.73 paf 148: // append to request's classes
1.91 paf 149: PC->request->classes().put(*name, PC->cclass);
1.73 paf 150: } else {
1.34 paf 151: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
152: YYERROR;
153: }
154: } else {
1.85 paf 155: if(command==USE_CONTROL_METHOD_NAME) {
1.34 paf 156: for(int i=0; i<strings_code->size(); i+=2) {
1.82 paf 157: String file(*SLA2S(strings_code, i));
158: file.APPEND_CONST(".p");
1.91 paf 159: PC->request->use_file(file.cstr());
1.34 paf 160: }
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);
1.34 paf 176: YYERROR;
177: }
1.91 paf 178: PC->cclass->set_base(*base);
1.45 paf 179: } else {
180: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
181: YYERROR;
1.34 paf 182: }
183: } else {
1.92 paf 184: strcpy(PC->error, "'");
1.93 paf 185: strncat(PC->error, command.cstr(), MAX_STRING/2);
1.92 paf 186: strcat(PC->error, "' invalid special name. valid names are "
187: "'"CLASS_NAME"', '"USE_CONTROL_METHOD_NAME"' and '"BASE_NAME"'");
1.34 paf 188: YYERROR;
189: }
190: }
191: };
1.37 paf 192: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
193: control_string: maybe_string '\n';
194: maybe_string: empty | STRING;
1.34 paf 195:
196: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 197: maybe_codes {
1.38 paf 198: const String *name=SLA2S($2);
1.10 paf 199:
200: YYSTYPE params_names_code=$3;
1.75 paf 201: Array *params_names=0;
202: if(int size=params_names_code->size()) {
203: params_names=NEW Array(POOL);
204: for(int i=0; i<size; i+=2)
205: *params_names+=SLA2S(params_names_code, i);
206: }
1.10 paf 207:
208: YYSTYPE locals_names_code=$4;
1.75 paf 209: Array *locals_names=0;
210: if(int size=locals_names_code->size()) {
211: locals_names=NEW Array(POOL);
212: for(int i=0; i<size; i+=2)
213: *locals_names+=SLA2S(locals_names_code, i);
214: }
1.10 paf 215:
1.76 paf 216: Method& method=*NEW Method(POOL,
217: *name,
1.81 paf 218: 0, 0/*min,max numbered_params_count*/,
1.76 paf 219: params_names, locals_names,
220: $7, 0);
1.91 paf 221: PC->cclass->add_method(*name, method);
1.8 paf 222: };
1.10 paf 223:
224: maybe_bracketed_strings: empty | bracketed_maybe_strings;
225: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
226: maybe_strings: empty | strings;
227: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
228:
229: maybe_comment: empty | STRING;
1.1 paf 230:
231: /* codes */
232:
1.10 paf 233: maybe_codes: empty | codes;
234:
1.90 paf 235: codes: code | codes code { $$=$1; P($$, $2) };
1.81 paf 236: code: write_string | action;
1.1 paf 237: action: get | put | with | call;
238:
239: /* get */
240:
1.64 paf 241: get: get_value {
242: $$=$1; /* stack: resulting value */
1.102 paf 243: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.1 paf 244: };
1.64 paf 245: get_value: '$' get_name_value { $$=$2 }
246: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 247: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 248: name_without_curly_rdive:
249: name_without_curly_rdive_read
250: | name_without_curly_rdive_root
251: | name_without_curly_rdive_class;
1.19 paf 252: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 253: $$=N(POOL);
1.22 paf 254: Array *diving_code=$1;
1.82 paf 255: const String *first_name=SLA2S(diving_code);
1.85 paf 256: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 257: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 258: P($$, diving_code,
259: /* skip over... */
260: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
261: } else {
1.54 paf 262: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 263: P($$, diving_code);
264: }
265: /* diving code; stack: current context */
1.1 paf 266: };
1.19 paf 267: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 268: $$=N(POOL);
1.54 paf 269: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 270: P($$, $2); /* diving code; stack: current context */
271: };
1.44 paf 272: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 273: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 274:
275: /* put */
276:
1.81 paf 277: put: '$' name_expr_wdive construct {
1.20 paf 278: $$=$2; /* stack: context,name */
1.52 paf 279: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 280: };
1.44 paf 281: name_expr_wdive:
282: name_expr_wdive_write
283: | name_expr_wdive_root
284: | name_expr_wdive_class;
1.28 paf 285: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 286: $$=N(POOL);
1.23 paf 287: Array *diving_code=$1;
1.82 paf 288: const String *first_name=SLA2S(diving_code);
1.85 paf 289: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 290: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 291: P($$, diving_code,
292: /* skip over... */
293: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
294: } else {
1.54 paf 295: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 296: P($$, diving_code);
297: }
298: /* diving code; stack: current context */
1.20 paf 299: };
1.28 paf 300: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 301: $$=N(POOL);
1.54 paf 302: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 303: P($$, $2); /* diving code; stack: context,name */
1.1 paf 304: };
1.44 paf 305: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 306:
1.81 paf 307: construct: construct_by_code | construct_by_expr;
308: construct_by_code: '[' any_constructor_code_value ']' {
309: $$=$2; /* stack: context, name, value */
310: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
311: }
312: ;
1.90 paf 313: construct_by_expr: '(' expr_value ')' {
1.81 paf 314: $$=$2; /* stack: context, name, value */
315: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
316: }
1.52 paf 317: ;
1.55 paf 318: any_constructor_code_value:
319: empty_string_value /* optimized $var[] case */
1.52 paf 320: | STRING /* optimized $var[STRING] case */
1.55 paf 321: | constructor_code_value /* $var[something complex] */
1.1 paf 322: ;
1.55 paf 323: constructor_code_value: constructor_code {
1.25 paf 324: $$=N(POOL);
1.54 paf 325: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 326: P($$, $1); /* some code that writes to that context */
1.54 paf 327: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 328: };
1.55 paf 329: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 330: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
331:
1.1 paf 332: /* call */
333:
1.66 paf 334: call: call_value {
335: $$=$1; /* stack: value */
1.102 paf 336: O($$, OP_WRITE_VALUE); /* value=pop; wcontext.write(value) */
1.66 paf 337: };
338: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 339: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 340: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 341: P($$, $3); /* filling method_frame.store_params */
1.66 paf 342: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 343: };
344:
1.43 paf 345: call_name: name_without_curly_rdive;
1.38 paf 346:
1.9 paf 347: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 348: store_param:
349: store_square_param
350: | store_round_param
351: | store_curly_param
1.31 paf 352: ;
1.69 paf 353: store_square_param: '[' store_code_param_parts ']' {$$=$2};
354: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.94 paf 355: store_curly_param: '{' store_curly_param_parts '}' {$$=$2};
1.69 paf 356: store_code_param_parts:
357: store_code_param_part
358: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
359: ;
360: store_expr_param_parts:
361: store_expr_param_part
362: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
363: ;
1.94 paf 364: store_curly_param_parts:
365: store_curly_param_part
366: | store_curly_param_parts ';' store_curly_param_part { $$=$1; P($$, $3) }
367: ;
1.69 paf 368: store_code_param_part:
1.78 paf 369: empty /* optimized [] case */
370: | STRING { /* optimized [STRING] case */
1.32 paf 371: $$=$1;
1.54 paf 372: O($$, OP_STORE_PARAM);
1.32 paf 373: }
1.78 paf 374: | constructor_code_value { /* [something complex] */
1.32 paf 375: $$=$1;
1.77 paf 376: O($$, OP_STORE_PARAM);
1.32 paf 377: }
378: ;
1.69 paf 379: store_expr_param_part: write_expr_value {
380: $$=N(POOL);
1.103 paf 381: PEA($$, $1);
1.69 paf 382: };
1.94 paf 383: store_curly_param_part: maybe_codes {
384: $$=N(POOL);
385: PCA($$, $1);
386: };
1.90 paf 387: write_expr_value: expr_value {
1.69 paf 388: $$=$1;
1.102 paf 389: O($$, OP_WRITE_EXPR_RESULT);
1.69 paf 390: };
1.1 paf 391:
392: /* name */
393:
1.20 paf 394: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 395:
1.9 paf 396: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 397: name_step: name_advance1 '.';
398: name_advance1: name_expr_value {
399: /* stack: context */
400: $$=$1; /* stack: context,name */
1.54 paf 401: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 402: };
403: name_advance2: 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: }
1.4 paf 408: | STRING BOGUS
1.1 paf 409: ;
410: name_expr_value:
1.4 paf 411: STRING /* subname_is_const */
1.1 paf 412: | name_expr_subvar_value /* $subname_is_var_value */
413: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
414: ;
415: name_expr_subvar_value: '$' subvar_ref_name_rdive {
416: $$=$2;
1.54 paf 417: O($$, OP_GET_ELEMENT);
1.1 paf 418: };
1.4 paf 419: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 420: $$=N(POOL);
1.54 paf 421: O($$, OP_CREATE_EWPOOL);
1.9 paf 422: P($$, $1);
1.102 paf 423: O($$, OP_WRITE_VALUE);
1.9 paf 424: P($$, $2);
1.54 paf 425: O($$, OP_REDUCE_EWPOOL);
1.1 paf 426: };
1.18 paf 427: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
428: subvar_ref_name_rdive_read: STRING {
1.25 paf 429: $$=N(POOL);
1.54 paf 430: O($$, OP_WITH_READ);
1.9 paf 431: P($$, $1);
1.1 paf 432: };
1.18 paf 433: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 434: $$=N(POOL);
1.54 paf 435: O($$, OP_WITH_ROOT);
1.18 paf 436: P($$, $2);
437: };
1.9 paf 438: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 439: subvar__get_write: '$' subvar_ref_name_rdive {
440: $$=$2;
1.54 paf 441: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 442: };
443:
1.44 paf 444: class_prefix: STRING ':' {
1.72 paf 445: $$=$1; // stack: class name string
446: O($$, OP_GET_CLASS);
1.1 paf 447: };
448:
449:
450: /* with */
451:
452: with: '$' name_without_curly_rdive '{' codes '}' {
453: $$=$2;
1.54 paf 454: O($$, OP_CREATE_RWPOOL);
1.9 paf 455: P($$, $4);
1.54 paf 456: O($$, OP_REDUCE_RWPOOL);
1.102 paf 457: O($$, OP_WRITE_VALUE);
1.1 paf 458: };
1.53 paf 459:
1.56 paf 460: /* expr */
1.53 paf 461:
1.81 paf 462: expr_value: expr {
463: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 464: change_string_literal_to_double_literal($$); // make that string literal Double
465: };
1.56 paf 466: expr:
1.62 paf 467: STRING
1.64 paf 468: | get_value
1.66 paf 469: | call_value
1.64 paf 470: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 471: | '(' expr ')' { $$ = $2; }
472: /* stack: operand // stack: @operand */
473: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 474: | '~' expr { $$=$2; O($$, OP_INV) }
475: | '!' expr { $$=$2; O($$, OP_NOT) }
476: | "def" expr { $$=$2; O($$, OP_DEF) }
477: | "in" expr { $$=$2; O($$, OP_IN) }
478: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 479: /* stack: a,b // stack: a@b */
480: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
481: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
482: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
483: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
484: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
485: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
486: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
487: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
488: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
489: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
490: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
491: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
492: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
493: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
494: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
495: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
496: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 497: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
498: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
499: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
500: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
501: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
502: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.95 paf 503: | expr "is" expr { $$=$1; P($$, $3); O($$, OP_IS) }
1.56 paf 504: ;
1.55 paf 505:
1.65 paf 506: string_inside_quotes_value: maybe_codes {
1.64 paf 507: $$=N(POOL);
508: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 509: P($$, $1); /* some code that writes to that context */
1.64 paf 510: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 511: };
1.1 paf 512:
1.27 paf 513: /* basics */
1.1 paf 514:
1.81 paf 515: write_string: STRING {
1.102 paf 516: // optimized from OP_STRING+OP_WRITE_VALUE to OP_STRING__WRITE
1.84 paf 517: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 518: };
519:
1.81 paf 520: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 521: empty: /* empty */ { $$=N(POOL) };
1.1 paf 522:
523: %%
1.105 ! paf 524: #endif
1.1 paf 525:
526: /*
527: 000$111(2222)00
528: 000$111{3333}00
1.9 paf 529: $,^: push,=0
1.1 paf 530: 1:( { break=pop
531: 2:( ) pop
532: 3:{ } pop
533:
534: 000^111(2222)4444{33333}4000
1.9 paf 535: $,^: push,=0
1.1 paf 536: 1:( { break=pop
537: 2:( )=4
538: 3:{ }=4
539: 4:[^({]=pop
540: */
541:
542: int yylex(YYSTYPE *lvalp, void *pc) {
543: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 544: #define RC {result=c; goto break2; }
1.1 paf 545:
546: register int c;
547: int result;
548:
549: if(PC->pending_state) {
550: result=PC->pending_state;
551: PC->pending_state=0;
552: return result;
553: }
554:
1.91 paf 555: const char *begin=PC->source;
556: const char *end;
1.9 paf 557: int begin_line=PC->line;
1.67 paf 558: int skip_analized=0;
1.50 paf 559: while(true) {
1.9 paf 560: c=*(end=(PC->source++));
1.1 paf 561:
1.4 paf 562: if(c=='\n') {
1.1 paf 563: PC->line++;
1.8 paf 564: PC->col=0;
1.10 paf 565: } else
1.4 paf 566: PC->col++;
1.73 paf 567:
568: // todo: # in 0+1 column comment
1.1 paf 569:
1.48 paf 570: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
571: if(c=='^')
572: switch(*PC->source) {
573: case '^': case '$': case ';':
574: case '[': case ']':
575: case '{': case '}':
576: case '"':
1.40 paf 577: if(end!=begin) {
578: // append piece till ^
579: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
580: }
1.63 paf 581: // reset piece 'begin' position & line
1.40 paf 582: begin=PC->source; // ^
1.9 paf 583: begin_line=PC->line;
1.40 paf 584: // skip over ^ and _
1.50 paf 585: PC->source++; PC->col++;
1.40 paf 586: // skip analysis = forced literal
1.1 paf 587: continue;
588: }
589: switch(PC->ls) {
1.10 paf 590:
591: // USER'S = NOT OURS
1.1 paf 592: case LS_USER:
1.48 paf 593: switch(c) {
594: case '$':
1.10 paf 595: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 596: RC;
597: case '^':
598: push_LS(PC, LS_METHOD_NAME);
599: RC;
600: case '@':
601: if(PC->col==0+1) {
602: push_LS(PC, LS_DEF_NAME);
603: RC;
604: }
605: break;
1.1 paf 606: }
1.48 paf 607: break;
608:
609: // STRING IN EXPRESSION
610: case LS_EXPRESSION_STRING:
611: switch(c) {
612: case '"':
613: pop_LS(PC); //"abc".
614: RC;
615: case '$':
616: push_LS(PC, LS_VAR_NAME_SIMPLE);
617: RC;
618: case '^':
1.10 paf 619: push_LS(PC, LS_METHOD_NAME);
1.48 paf 620: RC;
1.10 paf 621: }
622: break;
623:
624: // METHOD DEFINITION
625: case LS_DEF_NAME:
1.48 paf 626: switch(c) {
627: case '[':
1.10 paf 628: PC->ls=LS_DEF_PARAMS;
1.48 paf 629: RC;
630: case '\n':
631: PC->ls=LS_DEF_SPECIAL_BODY;
632: RC;
1.10 paf 633: }
634: break;
1.48 paf 635:
1.10 paf 636: case LS_DEF_PARAMS:
1.48 paf 637: switch(c) {
638: case ';':
639: RC;
640: case ']':
1.10 paf 641: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 642: RC;
1.49 paf 643: case '\n': // wrong. bailing out
1.10 paf 644: pop_LS(PC);
1.48 paf 645: RC;
1.10 paf 646: }
647: break;
1.48 paf 648:
1.10 paf 649: case LS_DEF_LOCALS:
1.48 paf 650: switch(c) {
651: case '[':
652: case ';':
653: RC;
654: case ']':
1.10 paf 655: PC->ls=LS_DEF_COMMENT;
1.48 paf 656: RC;
657: case '\n': // wrong. bailing out
1.10 paf 658: pop_LS(PC);
1.48 paf 659: RC;
1.10 paf 660: }
661: break;
1.48 paf 662:
1.10 paf 663: case LS_DEF_COMMENT:
664: if(c=='\n') {
665: pop_LS(PC);
1.48 paf 666: RC;
1.37 paf 667: }
668: break;
669:
1.48 paf 670: case LS_DEF_SPECIAL_BODY:
1.37 paf 671: if(c=='\n') {
1.48 paf 672: switch(*PC->source) {
673: case '@': case 0: // end of special_code
1.37 paf 674: pop_LS(PC);
1.48 paf 675: break;
676: }
677: RC;
678: }
679: break;
680:
681: // (EXPRESSION)
1.69 paf 682: case LS_VAR_ROUND:
683: case LS_METHOD_ROUND:
1.48 paf 684: switch(c) {
685: case ')':
686: if(--lexical_brackets_nestage==0)
1.69 paf 687: if(PC->ls==LS_METHOD_ROUND) // method round param ended
688: PC->ls=LS_METHOD_AFTER; // look for method end
689: else // PC->ls==LS_VAR_ROUND // variable constructor ended
690: pop_LS(PC); // return to normal life
1.48 paf 691: RC;
692: case '$':
1.69 paf 693: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 694: RC;
695: case '^':
696: push_LS(PC, LS_METHOD_NAME);
697: RC;
698: case '(':
699: lexical_brackets_nestage++;
700: RC;
1.67 paf 701: case '-':
702: if(*PC->source=='f') { // -f
703: skip_analized=1;
704: result=FEXISTS;
705: } else
706: result=c;
707: goto break2;
708: case '+': case '*': case '/': case '%':
1.58 paf 709: case '~':
1.48 paf 710: case ';':
711: RC;
1.59 paf 712: case '&': case '|': case '#':
1.58 paf 713: if(*PC->source==c) { // && ||
1.59 paf 714: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 715: skip_analized=1;
1.58 paf 716: } else
717: result=c;
718: goto break2;
719: case '<': case '>': case '=': case '!':
720: if(*PC->source=='=') { // <= >= == !=
1.67 paf 721: skip_analized=1;
1.58 paf 722: switch(c) {
723: case '<': result=NLE; break;
724: case '>': result=NGE; break;
725: case '=': result=NEQ; break;
726: case '!': result=NNE; break;
727: }
728: } else
729: result=c;
730: goto break2;
1.48 paf 731: case '"':
732: push_LS(PC, LS_EXPRESSION_STRING);
733: RC;
1.50 paf 734: case 'l': case 'g': case 'e': case 'n':
1.51 paf 735: if(end==begin) // right after whitespace
1.58 paf 736: switch(*PC->source) {
1.51 paf 737: // case '?': // ok [and bad cases, yacc would bark at them]
738: case 't': // lt gt [et nt]
1.62 paf 739: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 740: skip_analized=1;
1.58 paf 741: goto break2;
1.51 paf 742: case 'e': // le ge ne [ee]
1.58 paf 743: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 744: skip_analized=1;
1.58 paf 745: goto break2;
1.51 paf 746: case 'q': // eq [lq gq nq]
1.58 paf 747: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 748: skip_analized=1;
749: goto break2;
750: }
751: break;
752: case 'i':
753: if(end==begin) // right after whitespace
1.95 paf 754: switch(PC->source[0]) {
755: case 'n':
756: { // in
757: skip_analized=1;
758: result=IN;
759: goto break2;
760: }
761: case 's':
762: { // is
763: skip_analized=1;
764: result=IS;
765: goto break2;
766: }
1.67 paf 767: }
768: break;
769: case 'd':
770: if(end==begin) // right after whitespace
771: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
772: skip_analized=2;
773: result=DEF;
1.58 paf 774: goto break2;
1.50 paf 775: }
1.48 paf 776: break;
777: case ' ': case '\t': case '\n':
1.63 paf 778: if(end!=begin) { // there were a string after previous operator?
779: result=0; // return that string
780: goto break2;
1.48 paf 781: }
1.63 paf 782: // that's a leading|traling space or after-operator-space
783: // ignoring it
784: // reset piece 'begin' position & line
1.58 paf 785: begin=PC->source; // after whitespace char
1.48 paf 786: begin_line=PC->line;
787: continue;
1.1 paf 788: }
789: break;
790:
1.10 paf 791: // VARIABLE GET/PUT/WITH
1.1 paf 792: case LS_VAR_NAME_SIMPLE:
1.69 paf 793: case LS_EXPRESSION_VAR_NAME:
794: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 795: // name in expr ends also before binary operators
1.48 paf 796: switch(c) {
1.92 paf 797: case '-':
1.48 paf 798: pop_LS(PC);
799: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
800: result=EON;
801: goto break2;
802: }
803: }
804: switch(c) {
805: case 0:
806: case ' ': case '\t': case '\n':
807: case ';':
1.64 paf 808: case ']': case '}': case ')': case '"':
1.83 paf 809: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 810: case '+': case '*': case '/': case '%':
811: case '&': case '|':
812: case '=': case '!':
1.99 paf 813: // common delimiters
1.101 paf 814: case '\'': case ',':
1.1 paf 815: pop_LS(PC);
1.32 paf 816: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 817: result=EON;
1.1 paf 818: goto break2;
1.48 paf 819: case '[':
820: PC->ls=LS_VAR_SQUARE;
1.1 paf 821: lexical_brackets_nestage=1;
1.48 paf 822: RC;
823: case '{':
824: if(begin==end) { // ${name}, no need of EON, switching LS
825: PC->ls=LS_VAR_NAME_CURLY;
826: } else {
827: PC->ls=LS_VAR_CURLY;
828: lexical_brackets_nestage=1;
829: }
1.69 paf 830:
1.48 paf 831: RC;
832: case '(':
1.69 paf 833: PC->ls=LS_VAR_ROUND;
1.1 paf 834: lexical_brackets_nestage=1;
1.48 paf 835: RC;
836: case '.': // name part delim
837: case '$': // name part subvar
838: case ':': // ':name' or 'class:name'
839: RC;
1.1 paf 840: }
841: break;
1.48 paf 842:
1.1 paf 843: case LS_VAR_NAME_CURLY:
1.48 paf 844: switch(c) {
845: case '}': // ${name} finished, restoring LS
1.1 paf 846: pop_LS(PC);
1.48 paf 847: RC;
848: case '.': // name part delim
849: case '$': // name part subvar
850: case ':': // ':name' or 'class:name'
851: RC;
1.1 paf 852: }
853: break;
1.48 paf 854:
855: case LS_VAR_SQUARE:
856: switch(c) {
857: case '$':
1.10 paf 858: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 859: RC;
860: case '^':
1.10 paf 861: push_LS(PC, LS_METHOD_NAME);
1.48 paf 862: RC;
863: case ']':
1.1 paf 864: if(--lexical_brackets_nestage==0) {
865: pop_LS(PC);
1.48 paf 866: RC;
1.1 paf 867: }
1.48 paf 868: break;
869: case ';': // operator_or_fmt;value delim
870: RC;
871: case '[':
872: lexical_brackets_nestage++;
873: break;
1.1 paf 874: }
875: break;
1.48 paf 876:
1.1 paf 877: case LS_VAR_CURLY:
1.48 paf 878: switch(c) {
879: case '$':
1.10 paf 880: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 881: RC;
882: case '^':
1.10 paf 883: push_LS(PC, LS_METHOD_NAME);
1.48 paf 884: RC;
885: case '}':
1.1 paf 886: if(--lexical_brackets_nestage==0) {
887: pop_LS(PC);
1.48 paf 888: RC;
1.1 paf 889: }
1.48 paf 890: break;
891: case '{':
1.1 paf 892: lexical_brackets_nestage++;
1.48 paf 893: break;
894: }
1.1 paf 895: break;
896:
1.10 paf 897: // METHOD CALL
1.1 paf 898: case LS_METHOD_NAME:
1.48 paf 899: switch(c) {
900: case '[':
901: PC->ls=LS_METHOD_SQUARE;
1.1 paf 902: lexical_brackets_nestage=1;
1.48 paf 903: RC;
904: case '{':
1.1 paf 905: PC->ls=LS_METHOD_CURLY;
906: lexical_brackets_nestage=1;
1.48 paf 907: RC;
1.69 paf 908: case '(':
909: PC->ls=LS_METHOD_ROUND;
910: lexical_brackets_nestage=1;
911: RC;
1.48 paf 912: case '.': // name part delim
913: case '$': // name part subvar
914: case ':': // ':name' or 'class:name'
915: RC;
1.1 paf 916: }
917: break;
1.48 paf 918:
919: case LS_METHOD_SQUARE:
920: switch(c) {
921: case '$':
1.10 paf 922: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 923: RC;
924: case '^':
1.10 paf 925: push_LS(PC, LS_METHOD_NAME);
1.48 paf 926: RC;
927: case ';': // param delim
928: RC;
929: case ']':
1.1 paf 930: if(--lexical_brackets_nestage==0) {
931: PC->ls=LS_METHOD_AFTER;
1.48 paf 932: RC;
1.1 paf 933: }
1.48 paf 934: break;
935: case '[':
1.1 paf 936: lexical_brackets_nestage++;
1.48 paf 937: break;
938: }
1.1 paf 939: break;
1.48 paf 940:
1.1 paf 941: case LS_METHOD_CURLY:
1.48 paf 942: switch(c) {
943: case '$':
1.10 paf 944: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 945: RC;
946: case '^':
1.10 paf 947: push_LS(PC, LS_METHOD_NAME);
1.94 paf 948: RC;
949: case ';': // param delim
1.48 paf 950: RC;
951: case '}':
1.1 paf 952: if(--lexical_brackets_nestage==0) {
953: PC->ls=LS_METHOD_AFTER;
1.48 paf 954: RC;
1.1 paf 955: }
1.48 paf 956: break;
957: case '{':
1.1 paf 958: lexical_brackets_nestage++;
1.48 paf 959: break;
960: }
1.1 paf 961: break;
1.48 paf 962:
1.1 paf 963: case LS_METHOD_AFTER:
1.69 paf 964: if(c=='[') {/* ][ }[ )[ */
1.48 paf 965: PC->ls=LS_METHOD_SQUARE;
1.1 paf 966: lexical_brackets_nestage=1;
1.48 paf 967: RC;
1.1 paf 968: }
1.69 paf 969: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 970: PC->ls=LS_METHOD_CURLY;
1.69 paf 971: lexical_brackets_nestage=1;
972: RC;
973: }
974: if(c=='(') {/* ]( }( )( */
975: PC->ls=LS_METHOD_ROUND;
1.1 paf 976: lexical_brackets_nestage=1;
1.48 paf 977: RC;
1.1 paf 978: }
979: pop_LS(PC);
1.32 paf 980: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 981: result=EON;
1.1 paf 982: goto break2;
983: }
1.9 paf 984: if(c==0) {
1.1 paf 985: result=-1;
986: break;
987: }
988: }
989:
990: break2:
1.59 paf 991: if(end!=begin) { // there is last piece?
992: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
993: // strip last \n
1.10 paf 994: end--;
1.59 paf 995: }
996: if(end!=begin) { // last piece still alive?
997: // append it
1.30 paf 998: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
999: }
1.59 paf 1000: }
1001: if(PC->string->size()) { // something accumulated?
1.17 paf 1002: // create STRING value: array of OP_VALUE+vstring
1.55 paf 1003: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 1004: // new pieces storage
1.25 paf 1005: PC->string=NEW String(POOL);
1.58 paf 1006: // make current result be pending for next call, return STRING for now
1007: PC->pending_state=result; result=STRING;
1008: }
1.67 paf 1009: if(skip_analized) {
1010: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 1011: }
1.58 paf 1012: return result;
1.1 paf 1013: }
1014:
1.9 paf 1015: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 1016: {
1.46 paf 1017: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 1018: return 1;
1019: }
1020:
1021: static void
1.9 paf 1022: yyprint(
1.1 paf 1023: FILE *file,
1024: int type,
1025: YYSTYPE value)
1026: {
1.9 paf 1027: if(type==STRING)
1.38 paf 1028: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 1029: }
1030:
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