Annotation of parser3/src/main/compile.y, revision 1.95
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:
1.95 ! paf 6: $Id: compile.y,v 1.94 2001/03/13 09:05:31 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"
1.85 paf 38: #include "core.h"
1.39 paf 39:
1.85 paf 40: #define SELF_ELEMENT_NAME "self"
1.92 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_array()+=PC->cclass;
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) {
1.91 paf 162: if(PC->cclass->base()!=&PC->request->root_class) { // 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 */
1.66 paf 243: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
1.1 paf 244: };
1.64 paf 245: get_value: '$' get_name_value { $$=$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 */
336: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
337: };
338: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 339: $$=$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: $$=N(POOL);
381: PCA($$, $1);
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: $$=$1;
389: O($$, OP_WRITE);
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($$, $1);
1.54 paf 423: O($$, OP_WRITE);
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);
457: O($$, OP_WRITE);
1.1 paf 458: };
1.53 paf 459:
1.56 paf 460: /* expr */
1.53 paf 461:
1.81 paf 462: expr_value: expr {
463: if(($$=$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($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 511: };
1.1 paf 512:
1.27 paf 513: /* basics */
1.1 paf 514:
1.81 paf 515: write_string: STRING {
1.84 paf 516: // optimized from OP_STRING+OP_WRITE to OP_STRING__WRITE
517: change_string_literal_to_write_string_literal($$=$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: %%
524:
525: /*
526: 000$111(2222)00
527: 000$111{3333}00
1.9 paf 528: $,^: push,=0
1.1 paf 529: 1:( { break=pop
530: 2:( ) pop
531: 3:{ } pop
532:
533: 000^111(2222)4444{33333}4000
1.9 paf 534: $,^: push,=0
1.1 paf 535: 1:( { break=pop
536: 2:( )=4
537: 3:{ }=4
538: 4:[^({]=pop
539: */
540:
541: int yylex(YYSTYPE *lvalp, void *pc) {
542: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 543: #define RC {result=c; goto break2; }
1.1 paf 544:
545: register int c;
546: int result;
547:
548: if(PC->pending_state) {
549: result=PC->pending_state;
550: PC->pending_state=0;
551: return result;
552: }
553:
1.91 paf 554: const char *begin=PC->source;
555: const char *end;
1.9 paf 556: int begin_line=PC->line;
1.67 paf 557: int skip_analized=0;
1.50 paf 558: while(true) {
1.9 paf 559: c=*(end=(PC->source++));
1.1 paf 560:
1.4 paf 561: if(c=='\n') {
1.1 paf 562: PC->line++;
1.8 paf 563: PC->col=0;
1.10 paf 564: } else
1.4 paf 565: PC->col++;
1.73 paf 566:
567: // todo: # in 0+1 column comment
1.1 paf 568:
1.48 paf 569: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
570: if(c=='^')
571: switch(*PC->source) {
572: case '^': case '$': case ';':
573: case '[': case ']':
574: case '{': case '}':
575: case '"':
1.40 paf 576: if(end!=begin) {
577: // append piece till ^
578: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
579: }
1.63 paf 580: // reset piece 'begin' position & line
1.40 paf 581: begin=PC->source; // ^
1.9 paf 582: begin_line=PC->line;
1.40 paf 583: // skip over ^ and _
1.50 paf 584: PC->source++; PC->col++;
1.40 paf 585: // skip analysis = forced literal
1.1 paf 586: continue;
587: }
588: switch(PC->ls) {
1.10 paf 589:
590: // USER'S = NOT OURS
1.1 paf 591: case LS_USER:
1.48 paf 592: switch(c) {
593: case '$':
1.10 paf 594: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 595: RC;
596: case '^':
597: push_LS(PC, LS_METHOD_NAME);
598: RC;
599: case '@':
600: if(PC->col==0+1) {
601: push_LS(PC, LS_DEF_NAME);
602: RC;
603: }
604: break;
1.1 paf 605: }
1.48 paf 606: break;
607:
608: // STRING IN EXPRESSION
609: case LS_EXPRESSION_STRING:
610: switch(c) {
611: case '"':
612: pop_LS(PC); //"abc".
613: RC;
614: case '$':
615: push_LS(PC, LS_VAR_NAME_SIMPLE);
616: RC;
617: case '^':
1.10 paf 618: push_LS(PC, LS_METHOD_NAME);
1.48 paf 619: RC;
1.10 paf 620: }
621: break;
622:
623: // METHOD DEFINITION
624: case LS_DEF_NAME:
1.48 paf 625: switch(c) {
626: case '[':
1.10 paf 627: PC->ls=LS_DEF_PARAMS;
1.48 paf 628: RC;
629: case '\n':
630: PC->ls=LS_DEF_SPECIAL_BODY;
631: RC;
1.10 paf 632: }
633: break;
1.48 paf 634:
1.10 paf 635: case LS_DEF_PARAMS:
1.48 paf 636: switch(c) {
637: case ';':
638: RC;
639: case ']':
1.10 paf 640: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 641: RC;
1.49 paf 642: case '\n': // wrong. bailing out
1.10 paf 643: pop_LS(PC);
1.48 paf 644: RC;
1.10 paf 645: }
646: break;
1.48 paf 647:
1.10 paf 648: case LS_DEF_LOCALS:
1.48 paf 649: switch(c) {
650: case '[':
651: case ';':
652: RC;
653: case ']':
1.10 paf 654: PC->ls=LS_DEF_COMMENT;
1.48 paf 655: RC;
656: case '\n': // wrong. bailing out
1.10 paf 657: pop_LS(PC);
1.48 paf 658: RC;
1.10 paf 659: }
660: break;
1.48 paf 661:
1.10 paf 662: case LS_DEF_COMMENT:
663: if(c=='\n') {
664: pop_LS(PC);
1.48 paf 665: RC;
1.37 paf 666: }
667: break;
668:
1.48 paf 669: case LS_DEF_SPECIAL_BODY:
1.37 paf 670: if(c=='\n') {
1.48 paf 671: switch(*PC->source) {
672: case '@': case 0: // end of special_code
1.37 paf 673: pop_LS(PC);
1.48 paf 674: break;
675: }
676: RC;
677: }
678: break;
679:
680: // (EXPRESSION)
1.69 paf 681: case LS_VAR_ROUND:
682: case LS_METHOD_ROUND:
1.48 paf 683: switch(c) {
684: case ')':
685: if(--lexical_brackets_nestage==0)
1.69 paf 686: if(PC->ls==LS_METHOD_ROUND) // method round param ended
687: PC->ls=LS_METHOD_AFTER; // look for method end
688: else // PC->ls==LS_VAR_ROUND // variable constructor ended
689: pop_LS(PC); // return to normal life
1.48 paf 690: RC;
691: case '$':
1.69 paf 692: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 693: RC;
694: case '^':
695: push_LS(PC, LS_METHOD_NAME);
696: RC;
697: case '(':
698: lexical_brackets_nestage++;
699: RC;
1.67 paf 700: case '-':
701: if(*PC->source=='f') { // -f
702: skip_analized=1;
703: result=FEXISTS;
704: } else
705: result=c;
706: goto break2;
707: case '+': case '*': case '/': case '%':
1.58 paf 708: case '~':
1.48 paf 709: case ';':
710: RC;
1.59 paf 711: case '&': case '|': case '#':
1.58 paf 712: if(*PC->source==c) { // && ||
1.59 paf 713: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 714: skip_analized=1;
1.58 paf 715: } else
716: result=c;
717: goto break2;
718: case '<': case '>': case '=': case '!':
719: if(*PC->source=='=') { // <= >= == !=
1.67 paf 720: skip_analized=1;
1.58 paf 721: switch(c) {
722: case '<': result=NLE; break;
723: case '>': result=NGE; break;
724: case '=': result=NEQ; break;
725: case '!': result=NNE; break;
726: }
727: } else
728: result=c;
729: goto break2;
1.48 paf 730: case '"':
731: push_LS(PC, LS_EXPRESSION_STRING);
732: RC;
1.50 paf 733: case 'l': case 'g': case 'e': case 'n':
1.51 paf 734: if(end==begin) // right after whitespace
1.58 paf 735: switch(*PC->source) {
1.51 paf 736: // case '?': // ok [and bad cases, yacc would bark at them]
737: case 't': // lt gt [et nt]
1.62 paf 738: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 739: skip_analized=1;
1.58 paf 740: goto break2;
1.51 paf 741: case 'e': // le ge ne [ee]
1.58 paf 742: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 743: skip_analized=1;
1.58 paf 744: goto break2;
1.51 paf 745: case 'q': // eq [lq gq nq]
1.58 paf 746: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 747: skip_analized=1;
748: goto break2;
749: }
750: break;
751: case 'i':
752: if(end==begin) // right after whitespace
1.95 ! paf 753: switch(PC->source[0]) {
! 754: case 'n':
! 755: { // in
! 756: skip_analized=1;
! 757: result=IN;
! 758: goto break2;
! 759: }
! 760: case 's':
! 761: { // is
! 762: skip_analized=1;
! 763: result=IS;
! 764: goto break2;
! 765: }
1.67 paf 766: }
767: break;
768: case 'd':
769: if(end==begin) // right after whitespace
770: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
771: skip_analized=2;
772: result=DEF;
1.58 paf 773: goto break2;
1.50 paf 774: }
1.48 paf 775: break;
776: case ' ': case '\t': case '\n':
1.63 paf 777: if(end!=begin) { // there were a string after previous operator?
778: result=0; // return that string
779: goto break2;
1.48 paf 780: }
1.63 paf 781: // that's a leading|traling space or after-operator-space
782: // ignoring it
783: // reset piece 'begin' position & line
1.58 paf 784: begin=PC->source; // after whitespace char
1.48 paf 785: begin_line=PC->line;
786: continue;
1.1 paf 787: }
788: break;
789:
1.10 paf 790: // VARIABLE GET/PUT/WITH
1.1 paf 791: case LS_VAR_NAME_SIMPLE:
1.69 paf 792: case LS_EXPRESSION_VAR_NAME:
793: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 794: // name in expr ends also before binary operators
1.48 paf 795: switch(c) {
1.92 paf 796: case '-':
1.48 paf 797: pop_LS(PC);
798: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
799: result=EON;
800: goto break2;
801: }
802: }
803: switch(c) {
804: case 0:
805: case ' ': case '\t': case '\n':
806: case ';':
1.64 paf 807: case ']': case '}': case ')': case '"':
1.83 paf 808: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 paf 809: case '+': case '*': case '/': case '%':
810: case '&': case '|':
811: case '=': case '!':
1.1 paf 812: pop_LS(PC);
1.32 paf 813: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 814: result=EON;
1.1 paf 815: goto break2;
1.48 paf 816: case '[':
817: PC->ls=LS_VAR_SQUARE;
1.1 paf 818: lexical_brackets_nestage=1;
1.48 paf 819: RC;
820: case '{':
821: if(begin==end) { // ${name}, no need of EON, switching LS
822: PC->ls=LS_VAR_NAME_CURLY;
823: } else {
824: PC->ls=LS_VAR_CURLY;
825: lexical_brackets_nestage=1;
826: }
1.69 paf 827:
1.48 paf 828: RC;
829: case '(':
1.69 paf 830: PC->ls=LS_VAR_ROUND;
1.1 paf 831: lexical_brackets_nestage=1;
1.48 paf 832: RC;
833: case '.': // name part delim
834: case '$': // name part subvar
835: case ':': // ':name' or 'class:name'
836: RC;
1.1 paf 837: }
838: break;
1.48 paf 839:
1.1 paf 840: case LS_VAR_NAME_CURLY:
1.48 paf 841: switch(c) {
842: case '}': // ${name} finished, restoring LS
1.1 paf 843: pop_LS(PC);
1.48 paf 844: RC;
845: case '.': // name part delim
846: case '$': // name part subvar
847: case ':': // ':name' or 'class:name'
848: RC;
1.1 paf 849: }
850: break;
1.48 paf 851:
852: case LS_VAR_SQUARE:
853: switch(c) {
854: case '$':
1.10 paf 855: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 856: RC;
857: case '^':
1.10 paf 858: push_LS(PC, LS_METHOD_NAME);
1.48 paf 859: RC;
860: case ']':
1.1 paf 861: if(--lexical_brackets_nestage==0) {
862: pop_LS(PC);
1.48 paf 863: RC;
1.1 paf 864: }
1.48 paf 865: break;
866: case ';': // operator_or_fmt;value delim
867: RC;
868: case '[':
869: lexical_brackets_nestage++;
870: break;
1.1 paf 871: }
872: break;
1.48 paf 873:
1.1 paf 874: case LS_VAR_CURLY:
1.48 paf 875: switch(c) {
876: case '$':
1.10 paf 877: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 878: RC;
879: case '^':
1.10 paf 880: push_LS(PC, LS_METHOD_NAME);
1.48 paf 881: RC;
882: case '}':
1.1 paf 883: if(--lexical_brackets_nestage==0) {
884: pop_LS(PC);
1.48 paf 885: RC;
1.1 paf 886: }
1.48 paf 887: break;
888: case '{':
1.1 paf 889: lexical_brackets_nestage++;
1.48 paf 890: break;
891: }
1.1 paf 892: break;
893:
1.10 paf 894: // METHOD CALL
1.1 paf 895: case LS_METHOD_NAME:
1.48 paf 896: switch(c) {
897: case '[':
898: PC->ls=LS_METHOD_SQUARE;
1.1 paf 899: lexical_brackets_nestage=1;
1.48 paf 900: RC;
901: case '{':
1.1 paf 902: PC->ls=LS_METHOD_CURLY;
903: lexical_brackets_nestage=1;
1.48 paf 904: RC;
1.69 paf 905: case '(':
906: PC->ls=LS_METHOD_ROUND;
907: lexical_brackets_nestage=1;
908: RC;
1.48 paf 909: case '.': // name part delim
910: case '$': // name part subvar
911: case ':': // ':name' or 'class:name'
912: RC;
1.1 paf 913: }
914: break;
1.48 paf 915:
916: case LS_METHOD_SQUARE:
917: switch(c) {
918: case '$':
1.10 paf 919: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 920: RC;
921: case '^':
1.10 paf 922: push_LS(PC, LS_METHOD_NAME);
1.48 paf 923: RC;
924: case ';': // param delim
925: RC;
926: case ']':
1.1 paf 927: if(--lexical_brackets_nestage==0) {
928: PC->ls=LS_METHOD_AFTER;
1.48 paf 929: RC;
1.1 paf 930: }
1.48 paf 931: break;
932: case '[':
1.1 paf 933: lexical_brackets_nestage++;
1.48 paf 934: break;
935: }
1.1 paf 936: break;
1.48 paf 937:
1.1 paf 938: case LS_METHOD_CURLY:
1.48 paf 939: switch(c) {
940: case '$':
1.10 paf 941: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 942: RC;
943: case '^':
1.10 paf 944: push_LS(PC, LS_METHOD_NAME);
1.94 paf 945: RC;
946: case ';': // param delim
1.48 paf 947: RC;
948: case '}':
1.1 paf 949: if(--lexical_brackets_nestage==0) {
950: PC->ls=LS_METHOD_AFTER;
1.48 paf 951: RC;
1.1 paf 952: }
1.48 paf 953: break;
954: case '{':
1.1 paf 955: lexical_brackets_nestage++;
1.48 paf 956: break;
957: }
1.1 paf 958: break;
1.48 paf 959:
1.1 paf 960: case LS_METHOD_AFTER:
1.69 paf 961: if(c=='[') {/* ][ }[ )[ */
1.48 paf 962: PC->ls=LS_METHOD_SQUARE;
1.1 paf 963: lexical_brackets_nestage=1;
1.48 paf 964: RC;
1.1 paf 965: }
1.69 paf 966: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 967: PC->ls=LS_METHOD_CURLY;
1.69 paf 968: lexical_brackets_nestage=1;
969: RC;
970: }
971: if(c=='(') {/* ]( }( )( */
972: PC->ls=LS_METHOD_ROUND;
1.1 paf 973: lexical_brackets_nestage=1;
1.48 paf 974: RC;
1.1 paf 975: }
976: pop_LS(PC);
1.32 paf 977: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 978: result=EON;
1.1 paf 979: goto break2;
980: }
1.9 paf 981: if(c==0) {
1.1 paf 982: result=-1;
983: break;
984: }
985: }
986:
987: break2:
1.59 paf 988: if(end!=begin) { // there is last piece?
989: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
990: // strip last \n
1.10 paf 991: end--;
1.59 paf 992: }
993: if(end!=begin) { // last piece still alive?
994: // append it
1.30 paf 995: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
996: }
1.59 paf 997: }
998: if(PC->string->size()) { // something accumulated?
1.17 paf 999: // create STRING value: array of OP_VALUE+vstring
1.55 paf 1000: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 1001: // new pieces storage
1.25 paf 1002: PC->string=NEW String(POOL);
1.58 paf 1003: // make current result be pending for next call, return STRING for now
1004: PC->pending_state=result; result=STRING;
1005: }
1.67 paf 1006: if(skip_analized) {
1007: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 1008: }
1.58 paf 1009: return result;
1.1 paf 1010: }
1011:
1.9 paf 1012: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 1013: {
1.16 paf 1014: //fprintf(stderr, "[%s]\n", s);
1.6 paf 1015:
1.46 paf 1016: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 1017: return 1;
1018: }
1019:
1020: static void
1.9 paf 1021: yyprint(
1.1 paf 1022: FILE *file,
1023: int type,
1024: YYSTYPE value)
1025: {
1.9 paf 1026: if(type==STRING)
1.38 paf 1027: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 1028: }
1029:
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