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