Annotation of parser3/src/main/compile.y, revision 1.99
1.24 paf 1: /*
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:
1.99 ! paf 6: $Id: compile.y,v 1.98 2001/03/14 08:50:03 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)
1.1 paf 53: %}
54:
55: %pure_parser
56:
1.13 paf 57: %token EON
1.4 paf 58: %token STRING
1.1 paf 59: %token BOGUS
1.55 paf 60:
1.58 paf 61: %token BAD_STRING_COMPARISON_OPERATOR
62:
1.59 paf 63: %token LAND "&&"
1.58 paf 64: %token LOR "||"
1.59 paf 65: %token LXOR "##"
1.58 paf 66:
67: %token NLE "<="
68: %token NGE ">="
69: %token NEQ "=="
70: %token NNE "!="
71:
72: %token SLT "lt"
73: %token SGT "gt"
74: %token SLE "le"
75: %token SGE "ge"
76: %token SEQ "eq"
77: %token SNE "ne"
78:
1.67 paf 79: %token DEF "def"
80: %token IN "in"
81: %token FEXISTS "-f"
1.95 paf 82: %token IS "is"
1.67 paf 83:
1.57 paf 84: /* logical */
1.95 paf 85: %left "is"
1.61 paf 86: %left "lt" "gt" "le" "ge"
87: %left "eq" "ne"
1.59 paf 88: %left '<' '>' "<=" ">=" "##"
1.57 paf 89: %left "==" "!="
90: %left "||"
91: %left "&&"
1.67 paf 92: %left "def" "in" "-f"
1.68 paf 93: %left '!'
1.57 paf 94:
95: /* bitwise */
1.59 paf 96: %left '#'
1.57 paf 97: %left '&' '|'
1.68 paf 98: %left '~'
1.57 paf 99:
1.56 paf 100: /* numerical */
1.55 paf 101: %left '-' '+'
1.57 paf 102: %left '*' '/' '%'
1.56 paf 103: %left NEG /* negation: unary - */
1.1 paf 104:
105: %%
1.88 paf 106: all:
1.10 paf 107: one_big_piece {
1.75 paf 108: Method& method=*NEW Method(POOL,
1.85 paf 109: *main_method_name,
1.81 paf 110: 0, 0, /*min, max numbered_params_count*/
1.75 paf 111: 0/*param_names*/, 0/*local_names*/,
112: $1/*parser_code*/, 0/*native_code*/);
1.91 paf 113: PC->cclass->add_method(*main_method_name, method);
1.10 paf 114: }
115: | methods;
116:
117: methods: method | methods method;
118: one_big_piece: maybe_codes;
119:
1.34 paf 120: method: control_method | code_method;
121:
122: control_method: '@' STRING '\n'
123: control_strings {
1.82 paf 124: const String& command=*SLA2S($2);
1.34 paf 125: YYSTYPE strings_code=$4;
1.37 paf 126: if(strings_code->size()<1*2) {
127: strcpy(PC->error, "@");
1.74 paf 128: strcat(PC->error, command.cstr());
1.37 paf 129: strcat(PC->error, " is empty");
130: YYERROR;
131: }
1.74 paf 132: if(command==CLASS_NAME) {
1.91 paf 133: if(PC->cclass!=&PC->request->root_class) { // already changed from default?
1.73 paf 134: strcpy(PC->error, "class already have a name '");
1.91 paf 135: strncat(PC->error, PC->cclass->name().cstr(), 100);
1.73 paf 136: strcat(PC->error, "'");
137: YYERROR;
138: }
139: if(strings_code->size()==1*2) {
140: // new class' name
1.82 paf 141: const String *name=SLA2S(strings_code);
1.73 paf 142: // creating the class
1.91 paf 143: PC->cclass=NEW VClass(POOL);
144: PC->cclass->set_name(*name);
1.73 paf 145: // defaulting base. may change with @BASE
1.91 paf 146: PC->cclass->set_base(PC->request->root_class);
1.73 paf 147: // append to request's classes
1.91 paf 148: PC->request->classes().put(*name, PC->cclass);
1.73 paf 149: } else {
1.34 paf 150: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
151: YYERROR;
152: }
153: } else {
1.85 paf 154: if(command==USE_CONTROL_METHOD_NAME) {
1.34 paf 155: for(int i=0; i<strings_code->size(); i+=2) {
1.82 paf 156: String file(*SLA2S(strings_code, i));
157: file.APPEND_CONST(".p");
1.91 paf 158: PC->request->use_file(file.cstr());
1.34 paf 159: }
1.74 paf 160: } else if(command==BASE_NAME) {
1.91 paf 161: if(PC->cclass->base()!=&PC->request->root_class) { // already changed from default?
1.86 paf 162: strcpy(PC->error, "class already have a base '");
1.91 paf 163: strncat(PC->error, PC->cclass->base()->name().cstr(), 100);
1.86 paf 164: strcat(PC->error, "'");
1.73 paf 165: YYERROR;
166: }
1.45 paf 167: if(strings_code->size()==1*2) {
1.73 paf 168: // TODO: преодолеть self и циклические base
1.82 paf 169: const String& base_name=*SLA2S(strings_code);
1.45 paf 170: VClass *base=static_cast<VClass *>(
171: PC->request->classes().get(base_name));
172: if(!base) {
173: strcpy(PC->error, base_name.cstr());
174: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.34 paf 175: YYERROR;
176: }
1.91 paf 177: PC->cclass->set_base(*base);
1.45 paf 178: } else {
179: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
180: YYERROR;
1.34 paf 181: }
182: } else {
1.92 paf 183: strcpy(PC->error, "'");
1.93 paf 184: strncat(PC->error, command.cstr(), MAX_STRING/2);
1.92 paf 185: strcat(PC->error, "' invalid special name. valid names are "
186: "'"CLASS_NAME"', '"USE_CONTROL_METHOD_NAME"' and '"BASE_NAME"'");
1.34 paf 187: YYERROR;
188: }
189: }
190: };
1.37 paf 191: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
192: control_string: maybe_string '\n';
193: maybe_string: empty | STRING;
1.34 paf 194:
195: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 196: maybe_codes {
1.38 paf 197: const String *name=SLA2S($2);
1.10 paf 198:
199: YYSTYPE params_names_code=$3;
1.75 paf 200: Array *params_names=0;
201: if(int size=params_names_code->size()) {
202: params_names=NEW Array(POOL);
203: for(int i=0; i<size; i+=2)
204: *params_names+=SLA2S(params_names_code, i);
205: }
1.10 paf 206:
207: YYSTYPE locals_names_code=$4;
1.75 paf 208: Array *locals_names=0;
209: if(int size=locals_names_code->size()) {
210: locals_names=NEW Array(POOL);
211: for(int i=0; i<size; i+=2)
212: *locals_names+=SLA2S(locals_names_code, i);
213: }
1.10 paf 214:
1.76 paf 215: Method& method=*NEW Method(POOL,
216: *name,
1.81 paf 217: 0, 0/*min,max numbered_params_count*/,
1.76 paf 218: params_names, locals_names,
219: $7, 0);
1.91 paf 220: PC->cclass->add_method(*name, method);
1.8 paf 221: };
1.10 paf 222:
223: maybe_bracketed_strings: empty | bracketed_maybe_strings;
224: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
225: maybe_strings: empty | strings;
226: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
227:
228: maybe_comment: empty | STRING;
1.1 paf 229:
230: /* codes */
231:
1.10 paf 232: maybe_codes: empty | codes;
233:
1.90 paf 234: codes: code | codes code { $$=$1; P($$, $2) };
1.81 paf 235: code: write_string | action;
1.1 paf 236: action: get | put | with | call;
237:
238: /* get */
239:
1.64 paf 240: get: get_value {
241: $$=$1; /* stack: resulting value */
1.66 paf 242: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
1.1 paf 243: };
1.64 paf 244: get_value: '$' get_name_value { $$=$2 }
245: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 246: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 247: name_without_curly_rdive:
248: name_without_curly_rdive_read
249: | name_without_curly_rdive_root
250: | name_without_curly_rdive_class;
1.19 paf 251: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 252: $$=N(POOL);
1.22 paf 253: Array *diving_code=$1;
1.82 paf 254: const String *first_name=SLA2S(diving_code);
1.85 paf 255: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 256: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 257: P($$, diving_code,
258: /* skip over... */
259: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
260: } else {
1.54 paf 261: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 262: P($$, diving_code);
263: }
264: /* diving code; stack: current context */
1.1 paf 265: };
1.19 paf 266: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 267: $$=N(POOL);
1.54 paf 268: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 269: P($$, $2); /* diving code; stack: current context */
270: };
1.44 paf 271: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 272: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 273:
274: /* put */
275:
1.81 paf 276: put: '$' name_expr_wdive construct {
1.20 paf 277: $$=$2; /* stack: context,name */
1.52 paf 278: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 279: };
1.44 paf 280: name_expr_wdive:
281: name_expr_wdive_write
282: | name_expr_wdive_root
283: | name_expr_wdive_class;
1.28 paf 284: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 285: $$=N(POOL);
1.23 paf 286: Array *diving_code=$1;
1.82 paf 287: const String *first_name=SLA2S(diving_code);
1.85 paf 288: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 289: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 290: P($$, diving_code,
291: /* skip over... */
292: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
293: } else {
1.54 paf 294: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 295: P($$, diving_code);
296: }
297: /* diving code; stack: current context */
1.20 paf 298: };
1.28 paf 299: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 300: $$=N(POOL);
1.54 paf 301: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 302: P($$, $2); /* diving code; stack: context,name */
1.1 paf 303: };
1.44 paf 304: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 305:
1.81 paf 306: construct: construct_by_code | construct_by_expr;
307: construct_by_code: '[' any_constructor_code_value ']' {
308: $$=$2; /* stack: context, name, value */
309: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
310: }
311: ;
1.90 paf 312: construct_by_expr: '(' expr_value ')' {
1.81 paf 313: $$=$2; /* stack: context, name, value */
314: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
315: }
1.52 paf 316: ;
1.55 paf 317: any_constructor_code_value:
318: empty_string_value /* optimized $var[] case */
1.52 paf 319: | STRING /* optimized $var[STRING] case */
1.55 paf 320: | constructor_code_value /* $var[something complex] */
1.1 paf 321: ;
1.55 paf 322: constructor_code_value: constructor_code {
1.25 paf 323: $$=N(POOL);
1.54 paf 324: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 325: P($$, $1); /* some code that writes to that context */
1.54 paf 326: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 327: };
1.55 paf 328: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 329: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
330:
1.1 paf 331: /* call */
332:
1.66 paf 333: call: call_value {
334: $$=$1; /* stack: value */
335: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
336: };
337: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 338: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 339: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 340: P($$, $3); /* filling method_frame.store_params */
1.66 paf 341: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 342: };
343:
1.43 paf 344: call_name: name_without_curly_rdive;
1.38 paf 345:
1.9 paf 346: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 347: store_param:
348: store_square_param
349: | store_round_param
350: | store_curly_param
1.31 paf 351: ;
1.69 paf 352: store_square_param: '[' store_code_param_parts ']' {$$=$2};
353: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.94 paf 354: store_curly_param: '{' store_curly_param_parts '}' {$$=$2};
1.69 paf 355: store_code_param_parts:
356: store_code_param_part
357: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
358: ;
359: store_expr_param_parts:
360: store_expr_param_part
361: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
362: ;
1.94 paf 363: store_curly_param_parts:
364: store_curly_param_part
365: | store_curly_param_parts ';' store_curly_param_part { $$=$1; P($$, $3) }
366: ;
1.69 paf 367: store_code_param_part:
1.78 paf 368: empty /* optimized [] case */
369: | STRING { /* optimized [STRING] case */
1.32 paf 370: $$=$1;
1.54 paf 371: O($$, OP_STORE_PARAM);
1.32 paf 372: }
1.78 paf 373: | constructor_code_value { /* [something complex] */
1.32 paf 374: $$=$1;
1.77 paf 375: O($$, OP_STORE_PARAM);
1.32 paf 376: }
377: ;
1.69 paf 378: store_expr_param_part: write_expr_value {
379: $$=N(POOL);
380: PCA($$, $1);
381: };
1.94 paf 382: store_curly_param_part: maybe_codes {
383: $$=N(POOL);
384: PCA($$, $1);
385: };
1.90 paf 386: write_expr_value: expr_value {
1.69 paf 387: $$=$1;
388: O($$, OP_WRITE);
389: };
1.1 paf 390:
391: /* name */
392:
1.20 paf 393: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 394:
1.9 paf 395: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 396: name_step: name_advance1 '.';
397: name_advance1: name_expr_value {
398: /* stack: context */
399: $$=$1; /* stack: context,name */
1.54 paf 400: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 401: };
402: name_advance2: name_expr_value {
403: /* stack: context */
404: $$=$1; /* stack: context,name */
1.54 paf 405: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 406: }
1.4 paf 407: | STRING BOGUS
1.1 paf 408: ;
409: name_expr_value:
1.4 paf 410: STRING /* subname_is_const */
1.1 paf 411: | name_expr_subvar_value /* $subname_is_var_value */
412: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
413: ;
414: name_expr_subvar_value: '$' subvar_ref_name_rdive {
415: $$=$2;
1.54 paf 416: O($$, OP_GET_ELEMENT);
1.1 paf 417: };
1.4 paf 418: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 419: $$=N(POOL);
1.54 paf 420: O($$, OP_CREATE_EWPOOL);
1.9 paf 421: P($$, $1);
1.54 paf 422: O($$, OP_WRITE);
1.9 paf 423: P($$, $2);
1.54 paf 424: O($$, OP_REDUCE_EWPOOL);
1.1 paf 425: };
1.18 paf 426: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
427: subvar_ref_name_rdive_read: STRING {
1.25 paf 428: $$=N(POOL);
1.54 paf 429: O($$, OP_WITH_READ);
1.9 paf 430: P($$, $1);
1.1 paf 431: };
1.18 paf 432: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 433: $$=N(POOL);
1.54 paf 434: O($$, OP_WITH_ROOT);
1.18 paf 435: P($$, $2);
436: };
1.9 paf 437: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 438: subvar__get_write: '$' subvar_ref_name_rdive {
439: $$=$2;
1.54 paf 440: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 441: };
442:
1.44 paf 443: class_prefix: STRING ':' {
1.72 paf 444: $$=$1; // stack: class name string
445: O($$, OP_GET_CLASS);
1.1 paf 446: };
447:
448:
449: /* with */
450:
451: with: '$' name_without_curly_rdive '{' codes '}' {
452: $$=$2;
1.54 paf 453: O($$, OP_CREATE_RWPOOL);
1.9 paf 454: P($$, $4);
1.54 paf 455: O($$, OP_REDUCE_RWPOOL);
456: O($$, OP_WRITE);
1.1 paf 457: };
1.53 paf 458:
1.56 paf 459: /* expr */
1.53 paf 460:
1.81 paf 461: expr_value: expr {
462: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 463: change_string_literal_to_double_literal($$); // make that string literal Double
464: };
1.56 paf 465: expr:
1.62 paf 466: STRING
1.64 paf 467: | get_value
1.66 paf 468: | call_value
1.64 paf 469: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 470: | '(' expr ')' { $$ = $2; }
471: /* stack: operand // stack: @operand */
472: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 473: | '~' expr { $$=$2; O($$, OP_INV) }
474: | '!' expr { $$=$2; O($$, OP_NOT) }
475: | "def" expr { $$=$2; O($$, OP_DEF) }
476: | "in" expr { $$=$2; O($$, OP_IN) }
477: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 478: /* stack: a,b // stack: a@b */
479: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
480: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
481: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
482: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
483: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
484: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
485: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
486: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
487: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
488: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
489: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
490: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
491: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
492: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
493: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
494: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
495: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 496: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
497: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
498: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
499: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
500: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
501: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.95 paf 502: | expr "is" expr { $$=$1; P($$, $3); O($$, OP_IS) }
1.56 paf 503: ;
1.55 paf 504:
1.65 paf 505: string_inside_quotes_value: maybe_codes {
1.64 paf 506: $$=N(POOL);
507: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 508: P($$, $1); /* some code that writes to that context */
1.64 paf 509: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 510: };
1.1 paf 511:
1.27 paf 512: /* basics */
1.1 paf 513:
1.81 paf 514: write_string: STRING {
1.84 paf 515: // optimized from OP_STRING+OP_WRITE to OP_STRING__WRITE
516: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 517: };
518:
1.81 paf 519: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 520: empty: /* empty */ { $$=N(POOL) };
1.1 paf 521:
522: %%
523:
524: /*
525: 000$111(2222)00
526: 000$111{3333}00
1.9 paf 527: $,^: push,=0
1.1 paf 528: 1:( { break=pop
529: 2:( ) pop
530: 3:{ } pop
531:
532: 000^111(2222)4444{33333}4000
1.9 paf 533: $,^: push,=0
1.1 paf 534: 1:( { break=pop
535: 2:( )=4
536: 3:{ }=4
537: 4:[^({]=pop
538: */
539:
540: int yylex(YYSTYPE *lvalp, void *pc) {
541: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 542: #define RC {result=c; goto break2; }
1.1 paf 543:
544: register int c;
545: int result;
546:
547: if(PC->pending_state) {
548: result=PC->pending_state;
549: PC->pending_state=0;
550: return result;
551: }
552:
1.91 paf 553: const char *begin=PC->source;
554: const char *end;
1.9 paf 555: int begin_line=PC->line;
1.67 paf 556: int skip_analized=0;
1.50 paf 557: while(true) {
1.9 paf 558: c=*(end=(PC->source++));
1.1 paf 559:
1.4 paf 560: if(c=='\n') {
1.1 paf 561: PC->line++;
1.8 paf 562: PC->col=0;
1.10 paf 563: } else
1.4 paf 564: PC->col++;
1.73 paf 565:
566: // todo: # in 0+1 column comment
1.1 paf 567:
1.48 paf 568: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
569: if(c=='^')
570: switch(*PC->source) {
571: case '^': case '$': case ';':
572: case '[': case ']':
573: case '{': case '}':
574: case '"':
1.40 paf 575: if(end!=begin) {
576: // append piece till ^
577: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
578: }
1.63 paf 579: // reset piece 'begin' position & line
1.40 paf 580: begin=PC->source; // ^
1.9 paf 581: begin_line=PC->line;
1.40 paf 582: // skip over ^ and _
1.50 paf 583: PC->source++; PC->col++;
1.40 paf 584: // skip analysis = forced literal
1.1 paf 585: continue;
586: }
587: switch(PC->ls) {
1.10 paf 588:
589: // USER'S = NOT OURS
1.1 paf 590: case LS_USER:
1.48 paf 591: switch(c) {
592: case '$':
1.10 paf 593: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 594: RC;
595: case '^':
596: push_LS(PC, LS_METHOD_NAME);
597: RC;
598: case '@':
599: if(PC->col==0+1) {
600: push_LS(PC, LS_DEF_NAME);
601: RC;
602: }
603: break;
1.1 paf 604: }
1.48 paf 605: break;
606:
607: // STRING IN EXPRESSION
608: case LS_EXPRESSION_STRING:
609: switch(c) {
610: case '"':
611: pop_LS(PC); //"abc".
612: RC;
613: case '$':
614: push_LS(PC, LS_VAR_NAME_SIMPLE);
615: RC;
616: case '^':
1.10 paf 617: push_LS(PC, LS_METHOD_NAME);
1.48 paf 618: RC;
1.10 paf 619: }
620: break;
621:
622: // METHOD DEFINITION
623: case LS_DEF_NAME:
1.48 paf 624: switch(c) {
625: case '[':
1.10 paf 626: PC->ls=LS_DEF_PARAMS;
1.48 paf 627: RC;
628: case '\n':
629: PC->ls=LS_DEF_SPECIAL_BODY;
630: RC;
1.10 paf 631: }
632: break;
1.48 paf 633:
1.10 paf 634: case LS_DEF_PARAMS:
1.48 paf 635: switch(c) {
636: case ';':
637: RC;
638: case ']':
1.10 paf 639: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 640: RC;
1.49 paf 641: case '\n': // wrong. bailing out
1.10 paf 642: pop_LS(PC);
1.48 paf 643: RC;
1.10 paf 644: }
645: break;
1.48 paf 646:
1.10 paf 647: case LS_DEF_LOCALS:
1.48 paf 648: switch(c) {
649: case '[':
650: case ';':
651: RC;
652: case ']':
1.10 paf 653: PC->ls=LS_DEF_COMMENT;
1.48 paf 654: RC;
655: case '\n': // wrong. bailing out
1.10 paf 656: pop_LS(PC);
1.48 paf 657: RC;
1.10 paf 658: }
659: break;
1.48 paf 660:
1.10 paf 661: case LS_DEF_COMMENT:
662: if(c=='\n') {
663: pop_LS(PC);
1.48 paf 664: RC;
1.37 paf 665: }
666: break;
667:
1.48 paf 668: case LS_DEF_SPECIAL_BODY:
1.37 paf 669: if(c=='\n') {
1.48 paf 670: switch(*PC->source) {
671: case '@': case 0: // end of special_code
1.37 paf 672: pop_LS(PC);
1.48 paf 673: break;
674: }
675: RC;
676: }
677: break;
678:
679: // (EXPRESSION)
1.69 paf 680: case LS_VAR_ROUND:
681: case LS_METHOD_ROUND:
1.48 paf 682: switch(c) {
683: case ')':
684: if(--lexical_brackets_nestage==0)
1.69 paf 685: if(PC->ls==LS_METHOD_ROUND) // method round param ended
686: PC->ls=LS_METHOD_AFTER; // look for method end
687: else // PC->ls==LS_VAR_ROUND // variable constructor ended
688: pop_LS(PC); // return to normal life
1.48 paf 689: RC;
690: case '$':
1.69 paf 691: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 692: RC;
693: case '^':
694: push_LS(PC, LS_METHOD_NAME);
695: RC;
696: case '(':
697: lexical_brackets_nestage++;
698: RC;
1.67 paf 699: case '-':
700: if(*PC->source=='f') { // -f
701: skip_analized=1;
702: result=FEXISTS;
703: } else
704: result=c;
705: goto break2;
706: case '+': case '*': case '/': case '%':
1.58 paf 707: case '~':
1.48 paf 708: case ';':
709: RC;
1.59 paf 710: case '&': case '|': case '#':
1.58 paf 711: if(*PC->source==c) { // && ||
1.59 paf 712: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 713: skip_analized=1;
1.58 paf 714: } else
715: result=c;
716: goto break2;
717: case '<': case '>': case '=': case '!':
718: if(*PC->source=='=') { // <= >= == !=
1.67 paf 719: skip_analized=1;
1.58 paf 720: switch(c) {
721: case '<': result=NLE; break;
722: case '>': result=NGE; break;
723: case '=': result=NEQ; break;
724: case '!': result=NNE; break;
725: }
726: } else
727: result=c;
728: goto break2;
1.48 paf 729: case '"':
730: push_LS(PC, LS_EXPRESSION_STRING);
731: RC;
1.50 paf 732: case 'l': case 'g': case 'e': case 'n':
1.51 paf 733: if(end==begin) // right after whitespace
1.58 paf 734: switch(*PC->source) {
1.51 paf 735: // case '?': // ok [and bad cases, yacc would bark at them]
736: case 't': // lt gt [et nt]
1.62 paf 737: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 738: skip_analized=1;
1.58 paf 739: goto break2;
1.51 paf 740: case 'e': // le ge ne [ee]
1.58 paf 741: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 742: skip_analized=1;
1.58 paf 743: goto break2;
1.51 paf 744: case 'q': // eq [lq gq nq]
1.58 paf 745: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 746: skip_analized=1;
747: goto break2;
748: }
749: break;
750: case 'i':
751: if(end==begin) // right after whitespace
1.95 paf 752: switch(PC->source[0]) {
753: case 'n':
754: { // in
755: skip_analized=1;
756: result=IN;
757: goto break2;
758: }
759: case 's':
760: { // is
761: skip_analized=1;
762: result=IS;
763: goto break2;
764: }
1.67 paf 765: }
766: break;
767: case 'd':
768: if(end==begin) // right after whitespace
769: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
770: skip_analized=2;
771: result=DEF;
1.58 paf 772: goto break2;
1.50 paf 773: }
1.48 paf 774: break;
775: case ' ': case '\t': case '\n':
1.63 paf 776: if(end!=begin) { // there were a string after previous operator?
777: result=0; // return that string
778: goto break2;
1.48 paf 779: }
1.63 paf 780: // that's a leading|traling space or after-operator-space
781: // ignoring it
782: // reset piece 'begin' position & line
1.58 paf 783: begin=PC->source; // after whitespace char
1.48 paf 784: begin_line=PC->line;
785: continue;
1.1 paf 786: }
787: break;
788:
1.10 paf 789: // VARIABLE GET/PUT/WITH
1.1 paf 790: case LS_VAR_NAME_SIMPLE:
1.69 paf 791: case LS_EXPRESSION_VAR_NAME:
792: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 793: // name in expr ends also before binary operators
1.48 paf 794: switch(c) {
1.92 paf 795: case '-':
1.48 paf 796: pop_LS(PC);
797: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
798: result=EON;
799: goto break2;
800: }
801: }
802: switch(c) {
803: case 0:
804: case ' ': case '\t': case '\n':
805: case ';':
1.64 paf 806: case ']': case '}': case ')': case '"':
1.83 paf 807: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 808: case '+': case '*': case '/': case '%':
809: case '&': case '|':
810: case '=': case '!':
1.99 ! paf 811: // common delimiters
! 812: case '\'':
1.1 paf 813: pop_LS(PC);
1.32 paf 814: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 815: result=EON;
1.1 paf 816: goto break2;
1.48 paf 817: case '[':
818: PC->ls=LS_VAR_SQUARE;
1.1 paf 819: lexical_brackets_nestage=1;
1.48 paf 820: RC;
821: case '{':
822: if(begin==end) { // ${name}, no need of EON, switching LS
823: PC->ls=LS_VAR_NAME_CURLY;
824: } else {
825: PC->ls=LS_VAR_CURLY;
826: lexical_brackets_nestage=1;
827: }
1.69 paf 828:
1.48 paf 829: RC;
830: case '(':
1.69 paf 831: PC->ls=LS_VAR_ROUND;
1.1 paf 832: lexical_brackets_nestage=1;
1.48 paf 833: RC;
834: case '.': // name part delim
835: case '$': // name part subvar
836: case ':': // ':name' or 'class:name'
837: RC;
1.1 paf 838: }
839: break;
1.48 paf 840:
1.1 paf 841: case LS_VAR_NAME_CURLY:
1.48 paf 842: switch(c) {
843: case '}': // ${name} finished, restoring LS
1.1 paf 844: pop_LS(PC);
1.48 paf 845: RC;
846: case '.': // name part delim
847: case '$': // name part subvar
848: case ':': // ':name' or 'class:name'
849: RC;
1.1 paf 850: }
851: break;
1.48 paf 852:
853: case LS_VAR_SQUARE:
854: switch(c) {
855: case '$':
1.10 paf 856: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 857: RC;
858: case '^':
1.10 paf 859: push_LS(PC, LS_METHOD_NAME);
1.48 paf 860: RC;
861: case ']':
1.1 paf 862: if(--lexical_brackets_nestage==0) {
863: pop_LS(PC);
1.48 paf 864: RC;
1.1 paf 865: }
1.48 paf 866: break;
867: case ';': // operator_or_fmt;value delim
868: RC;
869: case '[':
870: lexical_brackets_nestage++;
871: break;
1.1 paf 872: }
873: break;
1.48 paf 874:
1.1 paf 875: case LS_VAR_CURLY:
1.48 paf 876: switch(c) {
877: case '$':
1.10 paf 878: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 879: RC;
880: case '^':
1.10 paf 881: push_LS(PC, LS_METHOD_NAME);
1.48 paf 882: RC;
883: case '}':
1.1 paf 884: if(--lexical_brackets_nestage==0) {
885: pop_LS(PC);
1.48 paf 886: RC;
1.1 paf 887: }
1.48 paf 888: break;
889: case '{':
1.1 paf 890: lexical_brackets_nestage++;
1.48 paf 891: break;
892: }
1.1 paf 893: break;
894:
1.10 paf 895: // METHOD CALL
1.1 paf 896: case LS_METHOD_NAME:
1.48 paf 897: switch(c) {
898: case '[':
899: PC->ls=LS_METHOD_SQUARE;
1.1 paf 900: lexical_brackets_nestage=1;
1.48 paf 901: RC;
902: case '{':
1.1 paf 903: PC->ls=LS_METHOD_CURLY;
904: lexical_brackets_nestage=1;
1.48 paf 905: RC;
1.69 paf 906: case '(':
907: PC->ls=LS_METHOD_ROUND;
908: lexical_brackets_nestage=1;
909: RC;
1.48 paf 910: case '.': // name part delim
911: case '$': // name part subvar
912: case ':': // ':name' or 'class:name'
913: RC;
1.1 paf 914: }
915: break;
1.48 paf 916:
917: case LS_METHOD_SQUARE:
918: switch(c) {
919: case '$':
1.10 paf 920: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 921: RC;
922: case '^':
1.10 paf 923: push_LS(PC, LS_METHOD_NAME);
1.48 paf 924: RC;
925: case ';': // param delim
926: RC;
927: case ']':
1.1 paf 928: if(--lexical_brackets_nestage==0) {
929: PC->ls=LS_METHOD_AFTER;
1.48 paf 930: RC;
1.1 paf 931: }
1.48 paf 932: break;
933: case '[':
1.1 paf 934: lexical_brackets_nestage++;
1.48 paf 935: break;
936: }
1.1 paf 937: break;
1.48 paf 938:
1.1 paf 939: case LS_METHOD_CURLY:
1.48 paf 940: switch(c) {
941: case '$':
1.10 paf 942: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 943: RC;
944: case '^':
1.10 paf 945: push_LS(PC, LS_METHOD_NAME);
1.94 paf 946: RC;
947: case ';': // param delim
1.48 paf 948: RC;
949: case '}':
1.1 paf 950: if(--lexical_brackets_nestage==0) {
951: PC->ls=LS_METHOD_AFTER;
1.48 paf 952: RC;
1.1 paf 953: }
1.48 paf 954: break;
955: case '{':
1.1 paf 956: lexical_brackets_nestage++;
1.48 paf 957: break;
958: }
1.1 paf 959: break;
1.48 paf 960:
1.1 paf 961: case LS_METHOD_AFTER:
1.69 paf 962: if(c=='[') {/* ][ }[ )[ */
1.48 paf 963: PC->ls=LS_METHOD_SQUARE;
1.1 paf 964: lexical_brackets_nestage=1;
1.48 paf 965: RC;
1.1 paf 966: }
1.69 paf 967: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 968: PC->ls=LS_METHOD_CURLY;
1.69 paf 969: lexical_brackets_nestage=1;
970: RC;
971: }
972: if(c=='(') {/* ]( }( )( */
973: PC->ls=LS_METHOD_ROUND;
1.1 paf 974: lexical_brackets_nestage=1;
1.48 paf 975: RC;
1.1 paf 976: }
977: pop_LS(PC);
1.32 paf 978: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 979: result=EON;
1.1 paf 980: goto break2;
981: }
1.9 paf 982: if(c==0) {
1.1 paf 983: result=-1;
984: break;
985: }
986: }
987:
988: break2:
1.59 paf 989: if(end!=begin) { // there is last piece?
990: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
991: // strip last \n
1.10 paf 992: end--;
1.59 paf 993: }
994: if(end!=begin) { // last piece still alive?
995: // append it
1.30 paf 996: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
997: }
1.59 paf 998: }
999: if(PC->string->size()) { // something accumulated?
1.17 paf 1000: // create STRING value: array of OP_VALUE+vstring
1.55 paf 1001: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 1002: // new pieces storage
1.25 paf 1003: PC->string=NEW String(POOL);
1.58 paf 1004: // make current result be pending for next call, return STRING for now
1005: PC->pending_state=result; result=STRING;
1006: }
1.67 paf 1007: if(skip_analized) {
1008: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 1009: }
1.58 paf 1010: return result;
1.1 paf 1011: }
1012:
1.9 paf 1013: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 1014: {
1.16 paf 1015: //fprintf(stderr, "[%s]\n", s);
1.6 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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