Annotation of parser3/src/main/compile.y, revision 1.92
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:
1.92 ! paf 6: $Id: compile.y,v 1.91 2001/03/12 09:08:50 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"
82:
1.57 paf 83: /* logical */
1.61 paf 84: %left "lt" "gt" "le" "ge"
85: %left "eq" "ne"
1.59 paf 86: %left '<' '>' "<=" ">=" "##"
1.57 paf 87: %left "==" "!="
88: %left "||"
89: %left "&&"
1.67 paf 90: %left "def" "in" "-f"
1.68 paf 91: %left '!'
1.57 paf 92:
93: /* bitwise */
1.59 paf 94: %left '#'
1.57 paf 95: %left '&' '|'
1.68 paf 96: %left '~'
1.57 paf 97:
1.56 paf 98: /* numerical */
1.55 paf 99: %left '-' '+'
1.57 paf 100: %left '*' '/' '%'
1.56 paf 101: %left NEG /* negation: unary - */
1.1 paf 102:
103: %%
1.88 paf 104: all:
1.10 paf 105: one_big_piece {
1.75 paf 106: Method& method=*NEW Method(POOL,
1.85 paf 107: *main_method_name,
1.81 paf 108: 0, 0, /*min, max numbered_params_count*/
1.75 paf 109: 0/*param_names*/, 0/*local_names*/,
110: $1/*parser_code*/, 0/*native_code*/);
1.91 paf 111: PC->cclass->add_method(*main_method_name, method);
1.10 paf 112: }
113: | methods;
114:
115: methods: method | methods method;
116: one_big_piece: maybe_codes;
117:
1.34 paf 118: method: control_method | code_method;
119:
120: control_method: '@' STRING '\n'
121: control_strings {
1.82 paf 122: const String& command=*SLA2S($2);
1.34 paf 123: YYSTYPE strings_code=$4;
1.37 paf 124: if(strings_code->size()<1*2) {
125: strcpy(PC->error, "@");
1.74 paf 126: strcat(PC->error, command.cstr());
1.37 paf 127: strcat(PC->error, " is empty");
128: YYERROR;
129: }
1.74 paf 130: if(command==CLASS_NAME) {
1.91 paf 131: if(PC->cclass!=&PC->request->root_class) { // already changed from default?
1.73 paf 132: strcpy(PC->error, "class already have a name '");
1.91 paf 133: strncat(PC->error, PC->cclass->name().cstr(), 100);
1.73 paf 134: strcat(PC->error, "'");
135: YYERROR;
136: }
137: if(strings_code->size()==1*2) {
138: // new class' name
1.82 paf 139: const String *name=SLA2S(strings_code);
1.73 paf 140: // creating the class
1.91 paf 141: PC->cclass=NEW VClass(POOL);
142: PC->cclass->set_name(*name);
1.73 paf 143: // defaulting base. may change with @BASE
1.91 paf 144: PC->cclass->set_base(PC->request->root_class);
1.73 paf 145: // append to request's classes
1.91 paf 146: PC->request->classes_array()+=PC->cclass;
147: PC->request->classes().put(*name, PC->cclass);
1.73 paf 148: } else {
1.34 paf 149: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
150: YYERROR;
151: }
152: } else {
1.85 paf 153: if(command==USE_CONTROL_METHOD_NAME) {
1.34 paf 154: for(int i=0; i<strings_code->size(); i+=2) {
1.82 paf 155: String file(*SLA2S(strings_code, i));
156: file.APPEND_CONST(".p");
1.91 paf 157: PC->request->use_file(file.cstr());
1.34 paf 158: }
1.74 paf 159: } else if(command==BASE_NAME) {
1.91 paf 160: if(PC->cclass->base()!=&PC->request->root_class) { // already changed from default?
1.86 paf 161: strcpy(PC->error, "class already have a base '");
1.91 paf 162: strncat(PC->error, PC->cclass->base()->name().cstr(), 100);
1.86 paf 163: strcat(PC->error, "'");
1.73 paf 164: YYERROR;
165: }
1.45 paf 166: if(strings_code->size()==1*2) {
1.73 paf 167: // TODO: преодолеть self и циклические base
1.82 paf 168: const String& base_name=*SLA2S(strings_code);
1.45 paf 169: VClass *base=static_cast<VClass *>(
170: PC->request->classes().get(base_name));
171: if(!base) {
172: strcpy(PC->error, base_name.cstr());
173: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.34 paf 174: YYERROR;
175: }
1.91 paf 176: PC->cclass->set_base(*base);
1.45 paf 177: } else {
178: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
179: YYERROR;
1.34 paf 180: }
181: } else {
1.92 ! paf 182: strcpy(PC->error, "'");
! 183: strncat(PC->error, command.cstr(), MAX_STRING-1);
! 184: strcat(PC->error, "' invalid special name. valid names are "
! 185: "'"CLASS_NAME"', '"USE_CONTROL_METHOD_NAME"' and '"BASE_NAME"'");
1.34 paf 186: YYERROR;
187: }
188: }
189: };
1.37 paf 190: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
191: control_string: maybe_string '\n';
192: maybe_string: empty | STRING;
1.34 paf 193:
194: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 195: maybe_codes {
1.38 paf 196: const String *name=SLA2S($2);
1.10 paf 197:
198: YYSTYPE params_names_code=$3;
1.75 paf 199: Array *params_names=0;
200: if(int size=params_names_code->size()) {
201: params_names=NEW Array(POOL);
202: for(int i=0; i<size; i+=2)
203: *params_names+=SLA2S(params_names_code, i);
204: }
1.10 paf 205:
206: YYSTYPE locals_names_code=$4;
1.75 paf 207: Array *locals_names=0;
208: if(int size=locals_names_code->size()) {
209: locals_names=NEW Array(POOL);
210: for(int i=0; i<size; i+=2)
211: *locals_names+=SLA2S(locals_names_code, i);
212: }
1.10 paf 213:
1.76 paf 214: Method& method=*NEW Method(POOL,
215: *name,
1.81 paf 216: 0, 0/*min,max numbered_params_count*/,
1.76 paf 217: params_names, locals_names,
218: $7, 0);
1.91 paf 219: PC->cclass->add_method(*name, method);
1.8 paf 220: };
1.10 paf 221:
222: maybe_bracketed_strings: empty | bracketed_maybe_strings;
223: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
224: maybe_strings: empty | strings;
225: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
226:
227: maybe_comment: empty | STRING;
1.1 paf 228:
229: /* codes */
230:
1.10 paf 231: maybe_codes: empty | codes;
232:
1.90 paf 233: codes: code | codes code { $$=$1; P($$, $2) };
1.81 paf 234: code: write_string | action;
1.1 paf 235: action: get | put | with | call;
236:
237: /* get */
238:
1.64 paf 239: get: get_value {
240: $$=$1; /* stack: resulting value */
1.66 paf 241: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
1.1 paf 242: };
1.64 paf 243: get_value: '$' get_name_value { $$=$2 }
244: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 245: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 246: name_without_curly_rdive:
247: name_without_curly_rdive_read
248: | name_without_curly_rdive_root
249: | name_without_curly_rdive_class;
1.19 paf 250: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 251: $$=N(POOL);
1.22 paf 252: Array *diving_code=$1;
1.82 paf 253: const String *first_name=SLA2S(diving_code);
1.85 paf 254: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 255: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 256: P($$, diving_code,
257: /* skip over... */
258: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
259: } else {
1.54 paf 260: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 261: P($$, diving_code);
262: }
263: /* diving code; stack: current context */
1.1 paf 264: };
1.19 paf 265: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 266: $$=N(POOL);
1.54 paf 267: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 268: P($$, $2); /* diving code; stack: current context */
269: };
1.44 paf 270: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 271: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 272:
273: /* put */
274:
1.81 paf 275: put: '$' name_expr_wdive construct {
1.20 paf 276: $$=$2; /* stack: context,name */
1.52 paf 277: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 278: };
1.44 paf 279: name_expr_wdive:
280: name_expr_wdive_write
281: | name_expr_wdive_root
282: | name_expr_wdive_class;
1.28 paf 283: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 284: $$=N(POOL);
1.23 paf 285: Array *diving_code=$1;
1.82 paf 286: const String *first_name=SLA2S(diving_code);
1.85 paf 287: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 288: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 289: P($$, diving_code,
290: /* skip over... */
291: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
292: } else {
1.54 paf 293: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 294: P($$, diving_code);
295: }
296: /* diving code; stack: current context */
1.20 paf 297: };
1.28 paf 298: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 299: $$=N(POOL);
1.54 paf 300: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 301: P($$, $2); /* diving code; stack: context,name */
1.1 paf 302: };
1.44 paf 303: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 304:
1.81 paf 305: construct: construct_by_code | construct_by_expr;
306: construct_by_code: '[' any_constructor_code_value ']' {
307: $$=$2; /* stack: context, name, value */
308: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
309: }
310: ;
1.90 paf 311: construct_by_expr: '(' expr_value ')' {
1.81 paf 312: $$=$2; /* stack: context, name, value */
313: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
314: }
1.52 paf 315: ;
1.55 paf 316: any_constructor_code_value:
317: empty_string_value /* optimized $var[] case */
1.52 paf 318: | STRING /* optimized $var[STRING] case */
1.55 paf 319: | constructor_code_value /* $var[something complex] */
1.1 paf 320: ;
1.55 paf 321: constructor_code_value: constructor_code {
1.25 paf 322: $$=N(POOL);
1.54 paf 323: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 324: P($$, $1); /* some code that writes to that context */
1.54 paf 325: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 326: };
1.55 paf 327: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 328: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
329:
1.1 paf 330: /* call */
331:
1.66 paf 332: call: call_value {
333: $$=$1; /* stack: value */
334: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
335: };
336: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 337: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 338: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 339: P($$, $3); /* filling method_frame.store_params */
1.66 paf 340: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 341: };
342:
1.43 paf 343: call_name: name_without_curly_rdive;
1.38 paf 344:
1.9 paf 345: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 346: store_param:
347: store_square_param
348: | store_round_param
349: | store_curly_param
1.31 paf 350: ;
1.69 paf 351: store_square_param: '[' store_code_param_parts ']' {$$=$2};
352: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.10 paf 353: store_curly_param: '{' maybe_codes '}' {
1.25 paf 354: $$=N(POOL);
1.29 paf 355: PCA($$, $2);
1.1 paf 356: };
1.69 paf 357: store_code_param_parts:
358: store_code_param_part
359: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
360: ;
361: store_expr_param_parts:
362: store_expr_param_part
363: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
364: ;
365: store_code_param_part:
1.78 paf 366: empty /* optimized [] case */
367: | STRING { /* optimized [STRING] case */
1.32 paf 368: $$=$1;
1.54 paf 369: O($$, OP_STORE_PARAM);
1.32 paf 370: }
1.78 paf 371: | constructor_code_value { /* [something complex] */
1.32 paf 372: $$=$1;
1.77 paf 373: O($$, OP_STORE_PARAM);
1.32 paf 374: }
375: ;
1.69 paf 376: store_expr_param_part: write_expr_value {
377: $$=N(POOL);
378: PCA($$, $1);
379: };
1.90 paf 380: write_expr_value: expr_value {
1.69 paf 381: $$=$1;
382: O($$, OP_WRITE);
383: };
1.1 paf 384:
385: /* name */
386:
1.20 paf 387: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 388:
1.9 paf 389: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 390: name_step: name_advance1 '.';
391: name_advance1: name_expr_value {
392: /* stack: context */
393: $$=$1; /* stack: context,name */
1.54 paf 394: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 395: };
396: name_advance2: name_expr_value {
397: /* stack: context */
398: $$=$1; /* stack: context,name */
1.54 paf 399: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 400: }
1.4 paf 401: | STRING BOGUS
1.1 paf 402: ;
403: name_expr_value:
1.4 paf 404: STRING /* subname_is_const */
1.1 paf 405: | name_expr_subvar_value /* $subname_is_var_value */
406: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
407: ;
408: name_expr_subvar_value: '$' subvar_ref_name_rdive {
409: $$=$2;
1.54 paf 410: O($$, OP_GET_ELEMENT);
1.1 paf 411: };
1.4 paf 412: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 413: $$=N(POOL);
1.54 paf 414: O($$, OP_CREATE_EWPOOL);
1.9 paf 415: P($$, $1);
1.54 paf 416: O($$, OP_WRITE);
1.9 paf 417: P($$, $2);
1.54 paf 418: O($$, OP_REDUCE_EWPOOL);
1.1 paf 419: };
1.18 paf 420: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
421: subvar_ref_name_rdive_read: STRING {
1.25 paf 422: $$=N(POOL);
1.54 paf 423: O($$, OP_WITH_READ);
1.9 paf 424: P($$, $1);
1.1 paf 425: };
1.18 paf 426: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 427: $$=N(POOL);
1.54 paf 428: O($$, OP_WITH_ROOT);
1.18 paf 429: P($$, $2);
430: };
1.9 paf 431: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 432: subvar__get_write: '$' subvar_ref_name_rdive {
433: $$=$2;
1.54 paf 434: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 435: };
436:
1.44 paf 437: class_prefix: STRING ':' {
1.72 paf 438: $$=$1; // stack: class name string
439: O($$, OP_GET_CLASS);
1.1 paf 440: };
441:
442:
443: /* with */
444:
445: with: '$' name_without_curly_rdive '{' codes '}' {
446: $$=$2;
1.54 paf 447: O($$, OP_CREATE_RWPOOL);
1.9 paf 448: P($$, $4);
1.54 paf 449: O($$, OP_REDUCE_RWPOOL);
450: O($$, OP_WRITE);
1.1 paf 451: };
1.53 paf 452:
1.56 paf 453: /* expr */
1.53 paf 454:
1.81 paf 455: expr_value: expr {
456: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 457: change_string_literal_to_double_literal($$); // make that string literal Double
458: };
1.56 paf 459: expr:
1.62 paf 460: STRING
1.64 paf 461: | get_value
1.66 paf 462: | call_value
1.64 paf 463: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 464: | '(' expr ')' { $$ = $2; }
465: /* stack: operand // stack: @operand */
466: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 467: | '~' expr { $$=$2; O($$, OP_INV) }
468: | '!' expr { $$=$2; O($$, OP_NOT) }
469: | "def" expr { $$=$2; O($$, OP_DEF) }
470: | "in" expr { $$=$2; O($$, OP_IN) }
471: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 472: /* stack: a,b // stack: a@b */
473: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
474: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
475: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
476: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
477: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
478: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
479: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
480: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
481: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
482: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
483: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
484: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
485: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
486: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
487: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
488: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
489: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 490: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
491: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
492: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
493: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
494: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
495: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.56 paf 496: ;
1.55 paf 497:
1.65 paf 498: string_inside_quotes_value: maybe_codes {
1.64 paf 499: $$=N(POOL);
500: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 501: P($$, $1); /* some code that writes to that context */
1.64 paf 502: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 503: };
1.1 paf 504:
1.27 paf 505: /* basics */
1.1 paf 506:
1.81 paf 507: write_string: STRING {
1.84 paf 508: // optimized from OP_STRING+OP_WRITE to OP_STRING__WRITE
509: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 510: };
511:
1.81 paf 512: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 513: empty: /* empty */ { $$=N(POOL) };
1.1 paf 514:
515: %%
516:
517: /*
518: 000$111(2222)00
519: 000$111{3333}00
1.9 paf 520: $,^: push,=0
1.1 paf 521: 1:( { break=pop
522: 2:( ) pop
523: 3:{ } pop
524:
525: 000^111(2222)4444{33333}4000
1.9 paf 526: $,^: push,=0
1.1 paf 527: 1:( { break=pop
528: 2:( )=4
529: 3:{ }=4
530: 4:[^({]=pop
531: */
532:
533: int yylex(YYSTYPE *lvalp, void *pc) {
534: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 535: #define RC {result=c; goto break2; }
1.1 paf 536:
537: register int c;
538: int result;
539:
540: if(PC->pending_state) {
541: result=PC->pending_state;
542: PC->pending_state=0;
543: return result;
544: }
545:
1.91 paf 546: const char *begin=PC->source;
547: const char *end;
1.9 paf 548: int begin_line=PC->line;
1.67 paf 549: int skip_analized=0;
1.50 paf 550: while(true) {
1.9 paf 551: c=*(end=(PC->source++));
1.1 paf 552:
1.4 paf 553: if(c=='\n') {
1.1 paf 554: PC->line++;
1.8 paf 555: PC->col=0;
1.10 paf 556: } else
1.4 paf 557: PC->col++;
1.73 paf 558:
559: // todo: # in 0+1 column comment
1.1 paf 560:
1.48 paf 561: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
562: if(c=='^')
563: switch(*PC->source) {
564: case '^': case '$': case ';':
565: case '[': case ']':
566: case '{': case '}':
567: case '"':
1.40 paf 568: if(end!=begin) {
569: // append piece till ^
570: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
571: }
1.63 paf 572: // reset piece 'begin' position & line
1.40 paf 573: begin=PC->source; // ^
1.9 paf 574: begin_line=PC->line;
1.40 paf 575: // skip over ^ and _
1.50 paf 576: PC->source++; PC->col++;
1.40 paf 577: // skip analysis = forced literal
1.1 paf 578: continue;
579: }
580: switch(PC->ls) {
1.10 paf 581:
582: // USER'S = NOT OURS
1.1 paf 583: case LS_USER:
1.48 paf 584: switch(c) {
585: case '$':
1.10 paf 586: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 587: RC;
588: case '^':
589: push_LS(PC, LS_METHOD_NAME);
590: RC;
591: case '@':
592: if(PC->col==0+1) {
593: push_LS(PC, LS_DEF_NAME);
594: RC;
595: }
596: break;
1.1 paf 597: }
1.48 paf 598: break;
599:
600: // STRING IN EXPRESSION
601: case LS_EXPRESSION_STRING:
602: switch(c) {
603: case '"':
604: pop_LS(PC); //"abc".
605: RC;
606: case '$':
607: push_LS(PC, LS_VAR_NAME_SIMPLE);
608: RC;
609: case '^':
1.10 paf 610: push_LS(PC, LS_METHOD_NAME);
1.48 paf 611: RC;
1.10 paf 612: }
613: break;
614:
615: // METHOD DEFINITION
616: case LS_DEF_NAME:
1.48 paf 617: switch(c) {
618: case '[':
1.10 paf 619: PC->ls=LS_DEF_PARAMS;
1.48 paf 620: RC;
621: case '\n':
622: PC->ls=LS_DEF_SPECIAL_BODY;
623: RC;
1.10 paf 624: }
625: break;
1.48 paf 626:
1.10 paf 627: case LS_DEF_PARAMS:
1.48 paf 628: switch(c) {
629: case ';':
630: RC;
631: case ']':
1.10 paf 632: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 633: RC;
1.49 paf 634: case '\n': // wrong. bailing out
1.10 paf 635: pop_LS(PC);
1.48 paf 636: RC;
1.10 paf 637: }
638: break;
1.48 paf 639:
1.10 paf 640: case LS_DEF_LOCALS:
1.48 paf 641: switch(c) {
642: case '[':
643: case ';':
644: RC;
645: case ']':
1.10 paf 646: PC->ls=LS_DEF_COMMENT;
1.48 paf 647: RC;
648: case '\n': // wrong. bailing out
1.10 paf 649: pop_LS(PC);
1.48 paf 650: RC;
1.10 paf 651: }
652: break;
1.48 paf 653:
1.10 paf 654: case LS_DEF_COMMENT:
655: if(c=='\n') {
656: pop_LS(PC);
1.48 paf 657: RC;
1.37 paf 658: }
659: break;
660:
1.48 paf 661: case LS_DEF_SPECIAL_BODY:
1.37 paf 662: if(c=='\n') {
1.48 paf 663: switch(*PC->source) {
664: case '@': case 0: // end of special_code
1.37 paf 665: pop_LS(PC);
1.48 paf 666: break;
667: }
668: RC;
669: }
670: break;
671:
672: // (EXPRESSION)
1.69 paf 673: case LS_VAR_ROUND:
674: case LS_METHOD_ROUND:
1.48 paf 675: switch(c) {
676: case ')':
677: if(--lexical_brackets_nestage==0)
1.69 paf 678: if(PC->ls==LS_METHOD_ROUND) // method round param ended
679: PC->ls=LS_METHOD_AFTER; // look for method end
680: else // PC->ls==LS_VAR_ROUND // variable constructor ended
681: pop_LS(PC); // return to normal life
1.48 paf 682: RC;
683: case '$':
1.69 paf 684: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 685: RC;
686: case '^':
687: push_LS(PC, LS_METHOD_NAME);
688: RC;
689: case '(':
690: lexical_brackets_nestage++;
691: RC;
1.67 paf 692: case '-':
693: if(*PC->source=='f') { // -f
694: skip_analized=1;
695: result=FEXISTS;
696: } else
697: result=c;
698: goto break2;
699: case '+': case '*': case '/': case '%':
1.58 paf 700: case '~':
1.48 paf 701: case ';':
702: RC;
1.59 paf 703: case '&': case '|': case '#':
1.58 paf 704: if(*PC->source==c) { // && ||
1.59 paf 705: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 706: skip_analized=1;
1.58 paf 707: } else
708: result=c;
709: goto break2;
710: case '<': case '>': case '=': case '!':
711: if(*PC->source=='=') { // <= >= == !=
1.67 paf 712: skip_analized=1;
1.58 paf 713: switch(c) {
714: case '<': result=NLE; break;
715: case '>': result=NGE; break;
716: case '=': result=NEQ; break;
717: case '!': result=NNE; break;
718: }
719: } else
720: result=c;
721: goto break2;
1.48 paf 722: case '"':
723: push_LS(PC, LS_EXPRESSION_STRING);
724: RC;
1.50 paf 725: case 'l': case 'g': case 'e': case 'n':
1.51 paf 726: if(end==begin) // right after whitespace
1.58 paf 727: switch(*PC->source) {
1.51 paf 728: // case '?': // ok [and bad cases, yacc would bark at them]
729: case 't': // lt gt [et nt]
1.62 paf 730: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 731: skip_analized=1;
1.58 paf 732: goto break2;
1.51 paf 733: case 'e': // le ge ne [ee]
1.58 paf 734: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 735: skip_analized=1;
1.58 paf 736: goto break2;
1.51 paf 737: case 'q': // eq [lq gq nq]
1.58 paf 738: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 739: skip_analized=1;
740: goto break2;
741: }
742: break;
743: case 'i':
744: if(end==begin) // right after whitespace
745: if(PC->source[0]=='n') { // in
746: skip_analized=1;
747: result=IN;
748: goto break2;
749: }
750: break;
751: case 'd':
752: if(end==begin) // right after whitespace
753: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
754: skip_analized=2;
755: result=DEF;
1.58 paf 756: goto break2;
1.50 paf 757: }
1.48 paf 758: break;
759: case ' ': case '\t': case '\n':
1.63 paf 760: if(end!=begin) { // there were a string after previous operator?
761: result=0; // return that string
762: goto break2;
1.48 paf 763: }
1.63 paf 764: // that's a leading|traling space or after-operator-space
765: // ignoring it
766: // reset piece 'begin' position & line
1.58 paf 767: begin=PC->source; // after whitespace char
1.48 paf 768: begin_line=PC->line;
769: continue;
1.1 paf 770: }
771: break;
772:
1.10 paf 773: // VARIABLE GET/PUT/WITH
1.1 paf 774: case LS_VAR_NAME_SIMPLE:
1.69 paf 775: case LS_EXPRESSION_VAR_NAME:
776: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 777: // name in expr ends also before binary operators
1.48 paf 778: switch(c) {
1.92 ! paf 779: case '-':
1.48 paf 780: pop_LS(PC);
781: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
782: result=EON;
783: goto break2;
784: }
785: }
786: switch(c) {
787: case 0:
788: case ' ': case '\t': case '\n':
789: case ';':
1.64 paf 790: case ']': case '}': case ')': case '"':
1.83 paf 791: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.92 ! paf 792: case '+': case '*': case '/': case '%':
! 793: case '&': case '|':
! 794: case '=': case '!':
1.1 paf 795: pop_LS(PC);
1.32 paf 796: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 797: result=EON;
1.1 paf 798: goto break2;
1.48 paf 799: case '[':
800: PC->ls=LS_VAR_SQUARE;
1.1 paf 801: lexical_brackets_nestage=1;
1.48 paf 802: RC;
803: case '{':
804: if(begin==end) { // ${name}, no need of EON, switching LS
805: PC->ls=LS_VAR_NAME_CURLY;
806: } else {
807: PC->ls=LS_VAR_CURLY;
808: lexical_brackets_nestage=1;
809: }
1.69 paf 810:
1.48 paf 811: RC;
812: case '(':
1.69 paf 813: PC->ls=LS_VAR_ROUND;
1.1 paf 814: lexical_brackets_nestage=1;
1.48 paf 815: RC;
816: case '.': // name part delim
817: case '$': // name part subvar
818: case ':': // ':name' or 'class:name'
819: RC;
1.1 paf 820: }
821: break;
1.48 paf 822:
1.1 paf 823: case LS_VAR_NAME_CURLY:
1.48 paf 824: switch(c) {
825: case '}': // ${name} finished, restoring LS
1.1 paf 826: pop_LS(PC);
1.48 paf 827: RC;
828: case '.': // name part delim
829: case '$': // name part subvar
830: case ':': // ':name' or 'class:name'
831: RC;
1.1 paf 832: }
833: break;
1.48 paf 834:
835: case LS_VAR_SQUARE:
836: switch(c) {
837: case '$':
1.10 paf 838: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 839: RC;
840: case '^':
1.10 paf 841: push_LS(PC, LS_METHOD_NAME);
1.48 paf 842: RC;
843: case ']':
1.1 paf 844: if(--lexical_brackets_nestage==0) {
845: pop_LS(PC);
1.48 paf 846: RC;
1.1 paf 847: }
1.48 paf 848: break;
849: case ';': // operator_or_fmt;value delim
850: RC;
851: case '[':
852: lexical_brackets_nestage++;
853: break;
1.1 paf 854: }
855: break;
1.48 paf 856:
1.1 paf 857: case LS_VAR_CURLY:
1.48 paf 858: switch(c) {
859: case '$':
1.10 paf 860: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 861: RC;
862: case '^':
1.10 paf 863: push_LS(PC, LS_METHOD_NAME);
1.48 paf 864: RC;
865: case '}':
1.1 paf 866: if(--lexical_brackets_nestage==0) {
867: pop_LS(PC);
1.48 paf 868: RC;
1.1 paf 869: }
1.48 paf 870: break;
871: case '{':
1.1 paf 872: lexical_brackets_nestage++;
1.48 paf 873: break;
874: }
1.1 paf 875: break;
876:
1.10 paf 877: // METHOD CALL
1.1 paf 878: case LS_METHOD_NAME:
1.48 paf 879: switch(c) {
880: case '[':
881: PC->ls=LS_METHOD_SQUARE;
1.1 paf 882: lexical_brackets_nestage=1;
1.48 paf 883: RC;
884: case '{':
1.1 paf 885: PC->ls=LS_METHOD_CURLY;
886: lexical_brackets_nestage=1;
1.48 paf 887: RC;
1.69 paf 888: case '(':
889: PC->ls=LS_METHOD_ROUND;
890: lexical_brackets_nestage=1;
891: RC;
1.48 paf 892: case '.': // name part delim
893: case '$': // name part subvar
894: case ':': // ':name' or 'class:name'
895: RC;
1.1 paf 896: }
897: break;
1.48 paf 898:
899: case LS_METHOD_SQUARE:
900: switch(c) {
901: case '$':
1.10 paf 902: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 903: RC;
904: case '^':
1.10 paf 905: push_LS(PC, LS_METHOD_NAME);
1.48 paf 906: RC;
907: case ';': // param delim
908: RC;
909: case ']':
1.1 paf 910: if(--lexical_brackets_nestage==0) {
911: PC->ls=LS_METHOD_AFTER;
1.48 paf 912: RC;
1.1 paf 913: }
1.48 paf 914: break;
915: case '[':
1.1 paf 916: lexical_brackets_nestage++;
1.48 paf 917: break;
918: }
1.1 paf 919: break;
1.48 paf 920:
1.1 paf 921: case LS_METHOD_CURLY:
1.48 paf 922: switch(c) {
923: case '$':
1.10 paf 924: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 925: RC;
926: case '^':
1.10 paf 927: push_LS(PC, LS_METHOD_NAME);
1.48 paf 928: RC;
929: case '}':
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_AFTER:
1.69 paf 942: if(c=='[') {/* ][ }[ )[ */
1.48 paf 943: PC->ls=LS_METHOD_SQUARE;
1.1 paf 944: lexical_brackets_nestage=1;
1.48 paf 945: RC;
1.1 paf 946: }
1.69 paf 947: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 948: PC->ls=LS_METHOD_CURLY;
1.69 paf 949: lexical_brackets_nestage=1;
950: RC;
951: }
952: if(c=='(') {/* ]( }( )( */
953: PC->ls=LS_METHOD_ROUND;
1.1 paf 954: lexical_brackets_nestage=1;
1.48 paf 955: RC;
1.1 paf 956: }
957: pop_LS(PC);
1.32 paf 958: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 959: result=EON;
1.1 paf 960: goto break2;
961: }
1.9 paf 962: if(c==0) {
1.1 paf 963: result=-1;
964: break;
965: }
966: }
967:
968: break2:
1.59 paf 969: if(end!=begin) { // there is last piece?
970: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
971: // strip last \n
1.10 paf 972: end--;
1.59 paf 973: }
974: if(end!=begin) { // last piece still alive?
975: // append it
1.30 paf 976: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
977: }
1.59 paf 978: }
979: if(PC->string->size()) { // something accumulated?
1.17 paf 980: // create STRING value: array of OP_VALUE+vstring
1.55 paf 981: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 982: // new pieces storage
1.25 paf 983: PC->string=NEW String(POOL);
1.58 paf 984: // make current result be pending for next call, return STRING for now
985: PC->pending_state=result; result=STRING;
986: }
1.67 paf 987: if(skip_analized) {
988: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 989: }
1.58 paf 990: return result;
1.1 paf 991: }
992:
1.9 paf 993: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 994: {
1.16 paf 995: //fprintf(stderr, "[%s]\n", s);
1.6 paf 996:
1.46 paf 997: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 998: return 1;
999: }
1000:
1001: static void
1.9 paf 1002: yyprint(
1.1 paf 1003: FILE *file,
1004: int type,
1005: YYSTYPE value)
1006: {
1.9 paf 1007: if(type==STRING)
1.38 paf 1008: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 1009: }
1010:
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