Annotation of parser3/src/main/compile.y, revision 1.79
1.24 paf 1: /*
1.79 ! paf 2: $Id: compile.y,v 1.78 2001/03/08 17:08:14 paf Exp $
1.24 paf 3: */
4:
1.1 paf 5: %{
1.9 paf 6: #define YYSTYPE Array/*<op>*/ *
7: #define YYPARSE_PARAM pc
8: #define YYLEX_PARAM pc
9: #define YYDEBUG 1
1.1 paf 10: #define YYERROR_VERBOSE
1.9 paf 11: #define yyerror(msg) real_yyerror((parse_control *)pc, msg)
12: #define YYPRINT(file, type, value) yyprint(file, type, value)
1.1 paf 13:
14: #include <stdio.h>
15: #include <string.h>
16: #include <stdlib.h>
17:
18: #include "compile_tools.h"
1.8 paf 19: #include "pa_value.h"
1.12 paf 20: #include "pa_request.h"
1.39 paf 21: #include "pa_vobject.h"
1.52 paf 22: #include "pa_vdouble.h"
1.39 paf 23:
24: #define SELF_NAME "self"
1.72 paf 25: #define USE_NAME "USE"
1.1 paf 26:
1.9 paf 27: int real_yyerror(parse_control *pc, char *s);
28: static void yyprint(FILE *file, int type, YYSTYPE value);
1.1 paf 29: int yylex(YYSTYPE *lvalp, void *pc);
30:
31:
1.8 paf 32: // local convinient inplace typecast & var
1.9 paf 33: #define PC ((parse_control *)pc)
1.25 paf 34: #define POOL *PC->pool
35: #undef NEW
36: #define NEW new(POOL)
1.1 paf 37: %}
38:
39: %pure_parser
40:
1.13 paf 41: %token EON
1.4 paf 42: %token STRING
1.1 paf 43: %token BOGUS
1.55 paf 44:
1.58 paf 45: %token BAD_STRING_COMPARISON_OPERATOR
46:
1.59 paf 47: %token LAND "&&"
1.58 paf 48: %token LOR "||"
1.59 paf 49: %token LXOR "##"
1.58 paf 50:
51: %token NLE "<="
52: %token NGE ">="
53: %token NEQ "=="
54: %token NNE "!="
55:
56: %token SLT "lt"
57: %token SGT "gt"
58: %token SLE "le"
59: %token SGE "ge"
60: %token SEQ "eq"
61: %token SNE "ne"
62:
1.67 paf 63: %token DEF "def"
64: %token IN "in"
65: %token FEXISTS "-f"
66:
1.57 paf 67: /* logical */
1.61 paf 68: %left "lt" "gt" "le" "ge"
69: %left "eq" "ne"
1.59 paf 70: %left '<' '>' "<=" ">=" "##"
1.57 paf 71: %left "==" "!="
72: %left "||"
73: %left "&&"
1.67 paf 74: %left "def" "in" "-f"
1.68 paf 75: %left '!'
1.57 paf 76:
77: /* bitwise */
1.59 paf 78: %left '#'
1.57 paf 79: %left '&' '|'
1.68 paf 80: %left '~'
1.57 paf 81:
1.56 paf 82: /* numerical */
1.55 paf 83: %left '-' '+'
1.57 paf 84: %left '*' '/' '%'
1.56 paf 85: %left NEG /* negation: unary - */
1.1 paf 86:
87: %%
88:
1.74 paf 89: all: /* TODO: у ^execute непременно задать какой-то name, см. 'RUN' */
1.10 paf 90: one_big_piece {
1.75 paf 91: String& MAIN=*NEW String(POOL);
92: MAIN.APPEND_CONST(MAIN_METHOD_NAME);
93: Method& method=*NEW Method(POOL,
94: MAIN,
1.76 paf 95: 0, /*numbered_params_count*/
1.75 paf 96: 0/*param_names*/, 0/*local_names*/,
97: $1/*parser_code*/, 0/*native_code*/);
98: PC->vclass->add_method(MAIN, method);
1.10 paf 99: }
100: | methods;
101:
102: methods: method | methods method;
103: one_big_piece: maybe_codes;
104:
1.34 paf 105: method: control_method | code_method;
106:
107: control_method: '@' STRING '\n'
108: control_strings {
1.74 paf 109: String& command=*SLA2S($2);
1.34 paf 110: YYSTYPE strings_code=$4;
1.37 paf 111: if(strings_code->size()<1*2) {
112: strcpy(PC->error, "@");
1.74 paf 113: strcat(PC->error, command.cstr());
1.37 paf 114: strcat(PC->error, " is empty");
115: YYERROR;
116: }
1.74 paf 117: if(command==CLASS_NAME) {
1.76 paf 118: if(PC->vclass!=&PC->request->root_class) { // already changed from default?
1.73 paf 119: strcpy(PC->error, "class already have a name '");
120: strncat(PC->error, PC->vclass->name().cstr(), 100);
121: strcat(PC->error, "'");
122: YYERROR;
123: }
124: if(strings_code->size()==1*2) {
125: // new class' name
126: String *name=SLA2S(strings_code);
127: // creating the class
128: PC->vclass=NEW VClass(POOL);
129: PC->vclass->set_name(*name);
130: // defaulting base. may change with @BASE
1.76 paf 131: PC->vclass->set_base(PC->request->root_class);
1.73 paf 132: // append to request's classes
133: PC->request->classes_array()+=PC->vclass;
134: PC->request->classes().put(*name, PC->vclass);
135: } else {
1.34 paf 136: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
137: YYERROR;
138: }
139: } else {
1.74 paf 140: if(command==USE_NAME) {
1.34 paf 141: for(int i=0; i<strings_code->size(); i+=2) {
1.38 paf 142: String *file=SLA2S(strings_code, i);
1.35 paf 143: file->APPEND_CONST(".p");
144: PC->request->use(file->cstr(), 0);
1.34 paf 145: }
1.74 paf 146: } else if(command==BASE_NAME) {
1.76 paf 147: if(PC->vclass->base()!=&PC->request->root_class) { // already changed from default?
1.73 paf 148: strcpy(PC->error, "there must be only one @"BASE_NAME);
149: YYERROR;
150: }
1.45 paf 151: if(strings_code->size()==1*2) {
1.73 paf 152: // TODO: преодолеть self и циклические base
1.45 paf 153: String& base_name=*SLA2S(strings_code);
154: VClass *base=static_cast<VClass *>(
155: PC->request->classes().get(base_name));
156: if(!base) {
157: strcpy(PC->error, base_name.cstr());
158: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.34 paf 159: YYERROR;
160: }
1.45 paf 161: PC->vclass->set_base(*base);
162: } else {
163: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
164: YYERROR;
1.34 paf 165: }
166: } else {
1.74 paf 167: strcpy(PC->error, command.cstr());
1.34 paf 168: strcat(PC->error, ": invalid special name. valid names are "
1.72 paf 169: CLASS_NAME", "USE_NAME" and "BASE_NAME);
1.34 paf 170: YYERROR;
171: }
172: }
173: };
1.37 paf 174: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
175: control_string: maybe_string '\n';
176: maybe_string: empty | STRING;
1.34 paf 177:
178: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 179: maybe_codes {
1.38 paf 180: const String *name=SLA2S($2);
1.10 paf 181:
182: YYSTYPE params_names_code=$3;
1.75 paf 183: Array *params_names=0;
184: if(int size=params_names_code->size()) {
185: params_names=NEW Array(POOL);
186: for(int i=0; i<size; i+=2)
187: *params_names+=SLA2S(params_names_code, i);
188: }
1.10 paf 189:
190: YYSTYPE locals_names_code=$4;
1.75 paf 191: Array *locals_names=0;
192: if(int size=locals_names_code->size()) {
193: locals_names=NEW Array(POOL);
194: for(int i=0; i<size; i+=2)
195: *locals_names+=SLA2S(locals_names_code, i);
196: }
1.10 paf 197:
1.76 paf 198: Method& method=*NEW Method(POOL,
199: *name,
200: 0/*numbered_params_count*/,
201: params_names, locals_names,
202: $7, 0);
1.34 paf 203: PC->vclass->add_method(*name, method);
1.8 paf 204: };
1.10 paf 205:
206: maybe_bracketed_strings: empty | bracketed_maybe_strings;
207: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
208: maybe_strings: empty | strings;
209: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
210:
211: maybe_comment: empty | STRING;
1.1 paf 212:
213: /* codes */
214:
1.10 paf 215: maybe_codes: empty | codes;
216:
1.1 paf 217: codes: code | codes code {
218: $$=$1;
1.9 paf 219: P($$, $2);
1.1 paf 220: };
221: code: write_str_literal | action;
222: action: get | put | with | call;
223:
224: /* get */
225:
1.64 paf 226: get: get_value {
227: $$=$1; /* stack: resulting value */
1.66 paf 228: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
1.1 paf 229: };
1.64 paf 230: get_value: '$' get_name_value { $$=$2 }
231: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 232: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 233: name_without_curly_rdive:
234: name_without_curly_rdive_read
235: | name_without_curly_rdive_root
236: | name_without_curly_rdive_class;
1.19 paf 237: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 238: $$=N(POOL);
1.22 paf 239: Array *diving_code=$1;
1.38 paf 240: String *first_name=SLA2S(diving_code);
1.23 paf 241: if(first_name && *first_name==SELF_NAME) {
1.54 paf 242: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 243: P($$, diving_code,
244: /* skip over... */
245: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
246: } else {
1.54 paf 247: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 248: P($$, diving_code);
249: }
250: /* diving code; stack: current context */
1.1 paf 251: };
1.19 paf 252: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 253: $$=N(POOL);
1.54 paf 254: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 255: P($$, $2); /* diving code; stack: current context */
256: };
1.44 paf 257: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 258: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 259:
260: /* put */
261:
1.52 paf 262: put: '$' name_expr_wdive constructor_value {
1.20 paf 263: $$=$2; /* stack: context,name */
1.52 paf 264: P($$, $3); /* stack: context,name,constructor_value */
1.54 paf 265: O($$, OP_CONSTRUCT); /* value=pop; name=pop; context=pop; construct(context,name,value) */
1.20 paf 266: };
1.44 paf 267: name_expr_wdive:
268: name_expr_wdive_write
269: | name_expr_wdive_root
270: | name_expr_wdive_class;
1.28 paf 271: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 272: $$=N(POOL);
1.23 paf 273: Array *diving_code=$1;
1.38 paf 274: String *first_name=SLA2S(diving_code);
1.23 paf 275: if(first_name && *first_name==SELF_NAME) {
1.54 paf 276: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 277: P($$, diving_code,
278: /* skip over... */
279: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
280: } else {
1.54 paf 281: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 282: P($$, diving_code);
283: }
284: /* diving code; stack: current context */
1.20 paf 285: };
1.28 paf 286: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 287: $$=N(POOL);
1.54 paf 288: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 289: P($$, $2); /* diving code; stack: context,name */
1.1 paf 290: };
1.44 paf 291: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 292:
1.1 paf 293: constructor_value:
1.55 paf 294: '[' any_constructor_code_value ']' { $$=$2 }
1.56 paf 295: | '(' any_expr ')' { $$=$2 }
1.52 paf 296: ;
1.55 paf 297: any_constructor_code_value:
298: empty_string_value /* optimized $var[] case */
1.52 paf 299: | STRING /* optimized $var[STRING] case */
1.55 paf 300: | constructor_code_value /* $var[something complex] */
1.1 paf 301: ;
1.55 paf 302: constructor_code_value: constructor_code {
1.25 paf 303: $$=N(POOL);
1.54 paf 304: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 305: P($$, $1); /* some code that writes to that context */
1.54 paf 306: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 307: };
1.55 paf 308: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 309: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
310:
1.1 paf 311: /* call */
312:
1.66 paf 313: call: call_value {
314: $$=$1; /* stack: value */
315: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
316: };
317: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 318: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 319: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 320: P($$, $3); /* filling method_frame.store_params */
1.66 paf 321: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 322: };
323:
1.43 paf 324: call_name: name_without_curly_rdive;
1.38 paf 325:
1.9 paf 326: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 327: store_param:
328: store_square_param
329: | store_round_param
330: | store_curly_param
1.31 paf 331: ;
1.69 paf 332: store_square_param: '[' store_code_param_parts ']' {$$=$2};
333: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.10 paf 334: store_curly_param: '{' maybe_codes '}' {
1.25 paf 335: $$=N(POOL);
1.29 paf 336: PCA($$, $2);
1.1 paf 337: };
1.69 paf 338: store_code_param_parts:
339: store_code_param_part
340: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
341: ;
342: store_expr_param_parts:
343: store_expr_param_part
344: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
345: ;
346: store_code_param_part:
1.78 paf 347: empty /* optimized [] case */
348: | STRING { /* optimized [STRING] case */
1.32 paf 349: $$=$1;
1.54 paf 350: O($$, OP_STORE_PARAM);
1.32 paf 351: }
1.78 paf 352: | constructor_code_value { /* [something complex] */
1.32 paf 353: $$=$1;
1.77 paf 354: O($$, OP_STORE_PARAM);
1.32 paf 355: }
356: ;
1.69 paf 357: store_expr_param_part: write_expr_value {
358: $$=N(POOL);
359: PCA($$, $1);
360: };
361: write_expr_value: any_expr {
362: $$=$1;
363: O($$, OP_WRITE);
364: };
1.1 paf 365:
366: /* name */
367:
1.20 paf 368: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 369:
1.9 paf 370: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 371: name_step: name_advance1 '.';
372: name_advance1: name_expr_value {
373: /* stack: context */
374: $$=$1; /* stack: context,name */
1.54 paf 375: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 376: };
377: name_advance2: name_expr_value {
378: /* stack: context */
379: $$=$1; /* stack: context,name */
1.54 paf 380: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 381: }
1.4 paf 382: | STRING BOGUS
1.1 paf 383: ;
384: name_expr_value:
1.4 paf 385: STRING /* subname_is_const */
1.1 paf 386: | name_expr_subvar_value /* $subname_is_var_value */
387: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
388: ;
389: name_expr_subvar_value: '$' subvar_ref_name_rdive {
390: $$=$2;
1.54 paf 391: O($$, OP_GET_ELEMENT);
1.1 paf 392: };
1.4 paf 393: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 394: $$=N(POOL);
1.54 paf 395: O($$, OP_CREATE_EWPOOL);
1.9 paf 396: P($$, $1);
1.54 paf 397: O($$, OP_WRITE);
1.9 paf 398: P($$, $2);
1.54 paf 399: O($$, OP_REDUCE_EWPOOL);
1.1 paf 400: };
1.18 paf 401: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
402: subvar_ref_name_rdive_read: STRING {
1.25 paf 403: $$=N(POOL);
1.54 paf 404: O($$, OP_WITH_READ);
1.9 paf 405: P($$, $1);
1.1 paf 406: };
1.18 paf 407: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 408: $$=N(POOL);
1.54 paf 409: O($$, OP_WITH_ROOT);
1.18 paf 410: P($$, $2);
411: };
1.9 paf 412: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 413: subvar__get_write: '$' subvar_ref_name_rdive {
414: $$=$2;
1.54 paf 415: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 416: };
417:
1.44 paf 418: class_prefix: STRING ':' {
1.72 paf 419: $$=$1; // stack: class name string
420: O($$, OP_GET_CLASS);
1.1 paf 421: };
422:
423:
424: /* with */
425:
426: with: '$' name_without_curly_rdive '{' codes '}' {
427: $$=$2;
1.54 paf 428: O($$, OP_CREATE_RWPOOL);
1.9 paf 429: P($$, $4);
1.54 paf 430: O($$, OP_REDUCE_RWPOOL);
431: O($$, OP_WRITE);
1.1 paf 432: };
1.53 paf 433:
1.56 paf 434: /* expr */
1.53 paf 435:
1.56 paf 436: any_expr:
1.55 paf 437: empty_double_value /* optimized $var() case */
1.62 paf 438: | optimized_expr /* $var(something) */
1.53 paf 439: ;
1.62 paf 440: optimized_expr: expr {
441: if(($$=$1)->size()==2) { // only one string literal in there?
442: change_string_literal_to_double_literal($$); // make that string literal Double
443: }
444: };
1.56 paf 445: expr:
1.62 paf 446: STRING
1.64 paf 447: | get_value
1.66 paf 448: | call_value
1.64 paf 449: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 450: | '(' expr ')' { $$ = $2; }
451: /* stack: operand // stack: @operand */
452: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 453: | '~' expr { $$=$2; O($$, OP_INV) }
454: | '!' expr { $$=$2; O($$, OP_NOT) }
455: | "def" expr { $$=$2; O($$, OP_DEF) }
456: | "in" expr { $$=$2; O($$, OP_IN) }
457: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 458: /* stack: a,b // stack: a@b */
459: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
460: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
461: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
462: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
463: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
464: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
465: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
466: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
467: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
468: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
469: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
470: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
471: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
472: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
473: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
474: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
475: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 476: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
477: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
478: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
479: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
480: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
481: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.56 paf 482: ;
1.55 paf 483:
1.65 paf 484: string_inside_quotes_value: maybe_codes {
1.64 paf 485: $$=N(POOL);
486: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 487: P($$, $1); /* some code that writes to that context */
1.64 paf 488: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 489: };
1.1 paf 490:
1.27 paf 491: /* basics */
1.1 paf 492:
1.4 paf 493: write_str_literal: STRING {
1.59 paf 494: $$=$1;
495: O($$, OP_WRITE);
1.54 paf 496: };
497:
1.79 ! paf 498: empty_double_value: /* empty */ { $$=VL(NEW VDouble(POOL, 0)) };
1.55 paf 499: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 500: empty: /* empty */ { $$=N(POOL) };
1.1 paf 501:
502: %%
503:
504: /*
505: 000$111(2222)00
506: 000$111{3333}00
1.9 paf 507: $,^: push,=0
1.1 paf 508: 1:( { break=pop
509: 2:( ) pop
510: 3:{ } pop
511:
512: 000^111(2222)4444{33333}4000
1.9 paf 513: $,^: push,=0
1.1 paf 514: 1:( { break=pop
515: 2:( )=4
516: 3:{ }=4
517: 4:[^({]=pop
518: */
519:
520: int yylex(YYSTYPE *lvalp, void *pc) {
521: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 522: #define RC {result=c; goto break2; }
1.1 paf 523:
524: register int c;
525: int result;
526:
527: if(PC->pending_state) {
528: result=PC->pending_state;
529: PC->pending_state=0;
530: return result;
531: }
532:
1.9 paf 533: char *begin=PC->source;
534: char *end;
535: int begin_line=PC->line;
1.67 paf 536: int skip_analized=0;
1.50 paf 537: while(true) {
1.9 paf 538: c=*(end=(PC->source++));
1.1 paf 539:
1.4 paf 540: if(c=='\n') {
1.1 paf 541: PC->line++;
1.8 paf 542: PC->col=0;
1.10 paf 543: } else
1.4 paf 544: PC->col++;
1.73 paf 545:
546: // todo: # in 0+1 column comment
1.1 paf 547:
1.48 paf 548: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
549: if(c=='^')
550: switch(*PC->source) {
551: case '^': case '$': case ';':
552: case '[': case ']':
553: case '{': case '}':
554: case '"':
1.40 paf 555: if(end!=begin) {
556: // append piece till ^
557: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
558: }
1.63 paf 559: // reset piece 'begin' position & line
1.40 paf 560: begin=PC->source; // ^
1.9 paf 561: begin_line=PC->line;
1.40 paf 562: // skip over ^ and _
1.50 paf 563: PC->source++; PC->col++;
1.40 paf 564: // skip analysis = forced literal
1.1 paf 565: continue;
566: }
567: switch(PC->ls) {
1.10 paf 568:
569: // USER'S = NOT OURS
1.1 paf 570: case LS_USER:
1.48 paf 571: switch(c) {
572: case '$':
1.10 paf 573: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 574: RC;
575: case '^':
576: push_LS(PC, LS_METHOD_NAME);
577: RC;
578: case '@':
579: if(PC->col==0+1) {
580: push_LS(PC, LS_DEF_NAME);
581: RC;
582: }
583: break;
1.1 paf 584: }
1.48 paf 585: break;
586:
587: // STRING IN EXPRESSION
588: case LS_EXPRESSION_STRING:
589: switch(c) {
590: case '"':
591: pop_LS(PC); //"abc".
592: RC;
593: case '$':
594: push_LS(PC, LS_VAR_NAME_SIMPLE);
595: RC;
596: case '^':
1.10 paf 597: push_LS(PC, LS_METHOD_NAME);
1.48 paf 598: RC;
1.10 paf 599: }
600: break;
601:
602: // METHOD DEFINITION
603: case LS_DEF_NAME:
1.48 paf 604: switch(c) {
605: case '[':
1.10 paf 606: PC->ls=LS_DEF_PARAMS;
1.48 paf 607: RC;
608: case '\n':
609: PC->ls=LS_DEF_SPECIAL_BODY;
610: RC;
1.10 paf 611: }
612: break;
1.48 paf 613:
1.10 paf 614: case LS_DEF_PARAMS:
1.48 paf 615: switch(c) {
616: case ';':
617: RC;
618: case ']':
1.10 paf 619: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 620: RC;
1.49 paf 621: case '\n': // wrong. bailing out
1.10 paf 622: pop_LS(PC);
1.48 paf 623: RC;
1.10 paf 624: }
625: break;
1.48 paf 626:
1.10 paf 627: case LS_DEF_LOCALS:
1.48 paf 628: switch(c) {
629: case '[':
630: case ';':
631: RC;
632: case ']':
1.10 paf 633: PC->ls=LS_DEF_COMMENT;
1.48 paf 634: RC;
635: case '\n': // wrong. bailing out
1.10 paf 636: pop_LS(PC);
1.48 paf 637: RC;
1.10 paf 638: }
639: break;
1.48 paf 640:
1.10 paf 641: case LS_DEF_COMMENT:
642: if(c=='\n') {
643: pop_LS(PC);
1.48 paf 644: RC;
1.37 paf 645: }
646: break;
647:
1.48 paf 648: case LS_DEF_SPECIAL_BODY:
1.37 paf 649: if(c=='\n') {
1.48 paf 650: switch(*PC->source) {
651: case '@': case 0: // end of special_code
1.37 paf 652: pop_LS(PC);
1.48 paf 653: break;
654: }
655: RC;
656: }
657: break;
658:
659: // (EXPRESSION)
1.69 paf 660: case LS_VAR_ROUND:
661: case LS_METHOD_ROUND:
1.48 paf 662: switch(c) {
663: case ')':
664: if(--lexical_brackets_nestage==0)
1.69 paf 665: if(PC->ls==LS_METHOD_ROUND) // method round param ended
666: PC->ls=LS_METHOD_AFTER; // look for method end
667: else // PC->ls==LS_VAR_ROUND // variable constructor ended
668: pop_LS(PC); // return to normal life
1.48 paf 669: RC;
670: case '$':
1.69 paf 671: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 672: RC;
673: case '^':
674: push_LS(PC, LS_METHOD_NAME);
675: RC;
676: case '(':
677: lexical_brackets_nestage++;
678: RC;
1.67 paf 679: case '-':
680: if(*PC->source=='f') { // -f
681: skip_analized=1;
682: result=FEXISTS;
683: } else
684: result=c;
685: goto break2;
686: case '+': case '*': case '/': case '%':
1.58 paf 687: case '~':
1.48 paf 688: case ';':
689: RC;
1.59 paf 690: case '&': case '|': case '#':
1.58 paf 691: if(*PC->source==c) { // && ||
1.59 paf 692: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 693: skip_analized=1;
1.58 paf 694: } else
695: result=c;
696: goto break2;
697: case '<': case '>': case '=': case '!':
698: if(*PC->source=='=') { // <= >= == !=
1.67 paf 699: skip_analized=1;
1.58 paf 700: switch(c) {
701: case '<': result=NLE; break;
702: case '>': result=NGE; break;
703: case '=': result=NEQ; break;
704: case '!': result=NNE; break;
705: }
706: } else
707: result=c;
708: goto break2;
1.48 paf 709: case '"':
710: push_LS(PC, LS_EXPRESSION_STRING);
711: RC;
1.50 paf 712: case 'l': case 'g': case 'e': case 'n':
1.51 paf 713: if(end==begin) // right after whitespace
1.58 paf 714: switch(*PC->source) {
1.51 paf 715: // case '?': // ok [and bad cases, yacc would bark at them]
716: case 't': // lt gt [et nt]
1.62 paf 717: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 718: skip_analized=1;
1.58 paf 719: goto break2;
1.51 paf 720: case 'e': // le ge ne [ee]
1.58 paf 721: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 722: skip_analized=1;
1.58 paf 723: goto break2;
1.51 paf 724: case 'q': // eq [lq gq nq]
1.58 paf 725: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 726: skip_analized=1;
727: goto break2;
728: }
729: break;
730: case 'i':
731: if(end==begin) // right after whitespace
732: if(PC->source[0]=='n') { // in
733: skip_analized=1;
734: result=IN;
735: goto break2;
736: }
737: break;
738: case 'd':
739: if(end==begin) // right after whitespace
740: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
741: skip_analized=2;
742: result=DEF;
1.58 paf 743: goto break2;
1.50 paf 744: }
1.48 paf 745: break;
746: case ' ': case '\t': case '\n':
1.63 paf 747: if(end!=begin) { // there were a string after previous operator?
748: result=0; // return that string
749: goto break2;
1.48 paf 750: }
1.63 paf 751: // that's a leading|traling space or after-operator-space
752: // ignoring it
753: // reset piece 'begin' position & line
1.58 paf 754: begin=PC->source; // after whitespace char
1.48 paf 755: begin_line=PC->line;
756: continue;
1.1 paf 757: }
758: break;
759:
1.10 paf 760: // VARIABLE GET/PUT/WITH
1.1 paf 761: case LS_VAR_NAME_SIMPLE:
1.69 paf 762: case LS_EXPRESSION_VAR_NAME:
763: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 764: // name in expr ends also before binary operators
1.48 paf 765: switch(c) {
766: case '+': case '-': case '*': case '/': case '%':
767: case '&': case '|':
768: case '<': case '>': case '=': case '!':
769: pop_LS(PC);
770: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
771: result=EON;
772: goto break2;
773: }
774: }
775: switch(c) {
776: case 0:
777: case ' ': case '\t': case '\n':
778: case ';':
1.64 paf 779: case ']': case '}': case ')': case '"':
1.1 paf 780: pop_LS(PC);
1.32 paf 781: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 782: result=EON;
1.1 paf 783: goto break2;
1.48 paf 784: case '[':
785: PC->ls=LS_VAR_SQUARE;
1.1 paf 786: lexical_brackets_nestage=1;
1.48 paf 787: RC;
788: case '{':
789: if(begin==end) { // ${name}, no need of EON, switching LS
790: PC->ls=LS_VAR_NAME_CURLY;
791: } else {
792: PC->ls=LS_VAR_CURLY;
793: lexical_brackets_nestage=1;
794: }
1.69 paf 795:
1.48 paf 796: RC;
797: case '(':
1.69 paf 798: PC->ls=LS_VAR_ROUND;
1.1 paf 799: lexical_brackets_nestage=1;
1.48 paf 800: RC;
801: case '.': // name part delim
802: case '$': // name part subvar
803: case ':': // ':name' or 'class:name'
804: RC;
1.1 paf 805: }
806: break;
1.48 paf 807:
1.1 paf 808: case LS_VAR_NAME_CURLY:
1.48 paf 809: switch(c) {
810: case '}': // ${name} finished, restoring LS
1.1 paf 811: pop_LS(PC);
1.48 paf 812: RC;
813: case '.': // name part delim
814: case '$': // name part subvar
815: case ':': // ':name' or 'class:name'
816: RC;
1.1 paf 817: }
818: break;
1.48 paf 819:
820: case LS_VAR_SQUARE:
821: switch(c) {
822: case '$':
1.10 paf 823: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 824: RC;
825: case '^':
1.10 paf 826: push_LS(PC, LS_METHOD_NAME);
1.48 paf 827: RC;
828: case ']':
1.1 paf 829: if(--lexical_brackets_nestage==0) {
830: pop_LS(PC);
1.48 paf 831: RC;
1.1 paf 832: }
1.48 paf 833: break;
834: case ';': // operator_or_fmt;value delim
835: RC;
836: case '[':
837: lexical_brackets_nestage++;
838: break;
1.1 paf 839: }
840: break;
1.48 paf 841:
1.1 paf 842: case LS_VAR_CURLY:
1.48 paf 843: switch(c) {
844: case '$':
1.10 paf 845: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 846: RC;
847: case '^':
1.10 paf 848: push_LS(PC, LS_METHOD_NAME);
1.48 paf 849: RC;
850: case '}':
1.1 paf 851: if(--lexical_brackets_nestage==0) {
852: pop_LS(PC);
1.48 paf 853: RC;
1.1 paf 854: }
1.48 paf 855: break;
856: case '{':
1.1 paf 857: lexical_brackets_nestage++;
1.48 paf 858: break;
859: }
1.1 paf 860: break;
861:
1.10 paf 862: // METHOD CALL
1.1 paf 863: case LS_METHOD_NAME:
1.48 paf 864: switch(c) {
865: case '[':
866: PC->ls=LS_METHOD_SQUARE;
1.1 paf 867: lexical_brackets_nestage=1;
1.48 paf 868: RC;
869: case '{':
1.1 paf 870: PC->ls=LS_METHOD_CURLY;
871: lexical_brackets_nestage=1;
1.48 paf 872: RC;
1.69 paf 873: case '(':
874: PC->ls=LS_METHOD_ROUND;
875: lexical_brackets_nestage=1;
876: RC;
1.48 paf 877: case '.': // name part delim
878: case '$': // name part subvar
879: case ':': // ':name' or 'class:name'
880: RC;
1.1 paf 881: }
882: break;
1.48 paf 883:
884: case LS_METHOD_SQUARE:
885: switch(c) {
886: case '$':
1.10 paf 887: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 888: RC;
889: case '^':
1.10 paf 890: push_LS(PC, LS_METHOD_NAME);
1.48 paf 891: RC;
892: case ';': // param delim
893: RC;
894: case ']':
1.1 paf 895: if(--lexical_brackets_nestage==0) {
896: PC->ls=LS_METHOD_AFTER;
1.48 paf 897: RC;
1.1 paf 898: }
1.48 paf 899: break;
900: case '[':
1.1 paf 901: lexical_brackets_nestage++;
1.48 paf 902: break;
903: }
1.1 paf 904: break;
1.48 paf 905:
1.1 paf 906: case LS_METHOD_CURLY:
1.48 paf 907: switch(c) {
908: case '$':
1.10 paf 909: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 910: RC;
911: case '^':
1.10 paf 912: push_LS(PC, LS_METHOD_NAME);
1.48 paf 913: RC;
914: case '}':
1.1 paf 915: if(--lexical_brackets_nestage==0) {
916: PC->ls=LS_METHOD_AFTER;
1.48 paf 917: RC;
1.1 paf 918: }
1.48 paf 919: break;
920: case '{':
1.1 paf 921: lexical_brackets_nestage++;
1.48 paf 922: break;
923: }
1.1 paf 924: break;
1.48 paf 925:
1.1 paf 926: case LS_METHOD_AFTER:
1.69 paf 927: if(c=='[') {/* ][ }[ )[ */
1.48 paf 928: PC->ls=LS_METHOD_SQUARE;
1.1 paf 929: lexical_brackets_nestage=1;
1.48 paf 930: RC;
1.1 paf 931: }
1.69 paf 932: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 933: PC->ls=LS_METHOD_CURLY;
1.69 paf 934: lexical_brackets_nestage=1;
935: RC;
936: }
937: if(c=='(') {/* ]( }( )( */
938: PC->ls=LS_METHOD_ROUND;
1.1 paf 939: lexical_brackets_nestage=1;
1.48 paf 940: RC;
1.1 paf 941: }
942: pop_LS(PC);
1.32 paf 943: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 944: result=EON;
1.1 paf 945: goto break2;
946: }
1.9 paf 947: if(c==0) {
1.1 paf 948: result=-1;
949: break;
950: }
951: }
952:
953: break2:
1.59 paf 954: if(end!=begin) { // there is last piece?
955: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
956: // strip last \n
1.10 paf 957: end--;
1.59 paf 958: }
959: if(end!=begin) { // last piece still alive?
960: // append it
1.30 paf 961: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
962: }
1.59 paf 963: }
964: if(PC->string->size()) { // something accumulated?
1.17 paf 965: // create STRING value: array of OP_VALUE+vstring
1.55 paf 966: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 967: // new pieces storage
1.25 paf 968: PC->string=NEW String(POOL);
1.58 paf 969: // make current result be pending for next call, return STRING for now
970: PC->pending_state=result; result=STRING;
971: }
1.67 paf 972: if(skip_analized) {
973: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 974: }
1.58 paf 975: return result;
1.1 paf 976: }
977:
1.9 paf 978: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 979: {
1.16 paf 980: //fprintf(stderr, "[%s]\n", s);
1.6 paf 981:
1.46 paf 982: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 983: return 1;
984: }
985:
986: static void
1.9 paf 987: yyprint(
1.1 paf 988: FILE *file,
989: int type,
990: YYSTYPE value)
991: {
1.9 paf 992: if(type==STRING)
1.38 paf 993: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 994: }
995:
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