Annotation of parser3/src/main/compile.y, revision 1.85
1.24 paf 1: /*
1.85 ! paf 2: $Id: compile.y,v 1.84 2001/03/10 15:17:46 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"
1.85 ! paf 23: #include "core.h"
1.39 paf 24:
1.85 ! paf 25: #define SELF_ELEMENT_NAME "self"
! 26: #define USE_CONTROL_METHOD_NAME "USE"
1.1 paf 27:
1.9 paf 28: int real_yyerror(parse_control *pc, char *s);
29: static void yyprint(FILE *file, int type, YYSTYPE value);
1.1 paf 30: int yylex(YYSTYPE *lvalp, void *pc);
31:
32:
1.8 paf 33: // local convinient inplace typecast & var
1.9 paf 34: #define PC ((parse_control *)pc)
1.25 paf 35: #define POOL *PC->pool
36: #undef NEW
37: #define NEW new(POOL)
1.1 paf 38: %}
39:
40: %pure_parser
41:
1.13 paf 42: %token EON
1.4 paf 43: %token STRING
1.1 paf 44: %token BOGUS
1.55 paf 45:
1.58 paf 46: %token BAD_STRING_COMPARISON_OPERATOR
47:
1.59 paf 48: %token LAND "&&"
1.58 paf 49: %token LOR "||"
1.59 paf 50: %token LXOR "##"
1.58 paf 51:
52: %token NLE "<="
53: %token NGE ">="
54: %token NEQ "=="
55: %token NNE "!="
56:
57: %token SLT "lt"
58: %token SGT "gt"
59: %token SLE "le"
60: %token SGE "ge"
61: %token SEQ "eq"
62: %token SNE "ne"
63:
1.67 paf 64: %token DEF "def"
65: %token IN "in"
66: %token FEXISTS "-f"
67:
1.57 paf 68: /* logical */
1.61 paf 69: %left "lt" "gt" "le" "ge"
70: %left "eq" "ne"
1.59 paf 71: %left '<' '>' "<=" ">=" "##"
1.57 paf 72: %left "==" "!="
73: %left "||"
74: %left "&&"
1.67 paf 75: %left "def" "in" "-f"
1.68 paf 76: %left '!'
1.57 paf 77:
78: /* bitwise */
1.59 paf 79: %left '#'
1.57 paf 80: %left '&' '|'
1.68 paf 81: %left '~'
1.57 paf 82:
1.56 paf 83: /* numerical */
1.55 paf 84: %left '-' '+'
1.57 paf 85: %left '*' '/' '%'
1.56 paf 86: %left NEG /* negation: unary - */
1.1 paf 87:
88: %%
89:
1.74 paf 90: all: /* TODO: у ^execute непременно задать какой-то name, см. 'RUN' */
1.10 paf 91: one_big_piece {
1.75 paf 92: Method& method=*NEW Method(POOL,
1.85 ! paf 93: *main_method_name,
1.81 paf 94: 0, 0, /*min, max numbered_params_count*/
1.75 paf 95: 0/*param_names*/, 0/*local_names*/,
96: $1/*parser_code*/, 0/*native_code*/);
1.85 ! paf 97: PC->vclass->add_method(*main_method_name, method);
1.10 paf 98: }
99: | methods;
100:
101: methods: method | methods method;
102: one_big_piece: maybe_codes;
103:
1.34 paf 104: method: control_method | code_method;
105:
106: control_method: '@' STRING '\n'
107: control_strings {
1.82 paf 108: const String& command=*SLA2S($2);
1.34 paf 109: YYSTYPE strings_code=$4;
1.37 paf 110: if(strings_code->size()<1*2) {
111: strcpy(PC->error, "@");
1.74 paf 112: strcat(PC->error, command.cstr());
1.37 paf 113: strcat(PC->error, " is empty");
114: YYERROR;
115: }
1.74 paf 116: if(command==CLASS_NAME) {
1.76 paf 117: if(PC->vclass!=&PC->request->root_class) { // already changed from default?
1.73 paf 118: strcpy(PC->error, "class already have a name '");
119: strncat(PC->error, PC->vclass->name().cstr(), 100);
120: strcat(PC->error, "'");
121: YYERROR;
122: }
123: if(strings_code->size()==1*2) {
124: // new class' name
1.82 paf 125: const String *name=SLA2S(strings_code);
1.73 paf 126: // creating the class
127: PC->vclass=NEW VClass(POOL);
128: PC->vclass->set_name(*name);
129: // defaulting base. may change with @BASE
1.76 paf 130: PC->vclass->set_base(PC->request->root_class);
1.73 paf 131: // append to request's classes
132: PC->request->classes_array()+=PC->vclass;
133: PC->request->classes().put(*name, PC->vclass);
134: } else {
1.34 paf 135: strcpy(PC->error, "@"CLASS_NAME" must contain sole name");
136: YYERROR;
137: }
138: } else {
1.85 ! paf 139: if(command==USE_CONTROL_METHOD_NAME) {
1.34 paf 140: for(int i=0; i<strings_code->size(); i+=2) {
1.82 paf 141: String file(*SLA2S(strings_code, i));
142: file.APPEND_CONST(".p");
143: PC->request->use(file.cstr(), 0);
1.34 paf 144: }
1.74 paf 145: } else if(command==BASE_NAME) {
1.76 paf 146: if(PC->vclass->base()!=&PC->request->root_class) { // already changed from default?
1.73 paf 147: strcpy(PC->error, "there must be only one @"BASE_NAME);
148: YYERROR;
149: }
1.45 paf 150: if(strings_code->size()==1*2) {
1.73 paf 151: // TODO: преодолеть self и циклические base
1.82 paf 152: const String& base_name=*SLA2S(strings_code);
1.45 paf 153: VClass *base=static_cast<VClass *>(
154: PC->request->classes().get(base_name));
155: if(!base) {
156: strcpy(PC->error, base_name.cstr());
157: strcat(PC->error, ": undefined class in @"BASE_NAME);
1.34 paf 158: YYERROR;
159: }
1.45 paf 160: PC->vclass->set_base(*base);
161: } else {
162: strcpy(PC->error, "@"BASE_NAME" must contain sole name");
163: YYERROR;
1.34 paf 164: }
165: } else {
1.74 paf 166: strcpy(PC->error, command.cstr());
1.34 paf 167: strcat(PC->error, ": invalid special name. valid names are "
1.85 ! paf 168: CLASS_NAME", "USE_CONTROL_METHOD_NAME" and "BASE_NAME);
1.34 paf 169: YYERROR;
170: }
171: }
172: };
1.37 paf 173: control_strings: control_string | control_strings control_string { $$=$1; P($$, $2) };
174: control_string: maybe_string '\n';
175: maybe_string: empty | STRING;
1.34 paf 176:
177: code_method: '@' STRING bracketed_maybe_strings maybe_bracketed_strings maybe_comment '\n'
1.10 paf 178: maybe_codes {
1.38 paf 179: const String *name=SLA2S($2);
1.10 paf 180:
181: YYSTYPE params_names_code=$3;
1.75 paf 182: Array *params_names=0;
183: if(int size=params_names_code->size()) {
184: params_names=NEW Array(POOL);
185: for(int i=0; i<size; i+=2)
186: *params_names+=SLA2S(params_names_code, i);
187: }
1.10 paf 188:
189: YYSTYPE locals_names_code=$4;
1.75 paf 190: Array *locals_names=0;
191: if(int size=locals_names_code->size()) {
192: locals_names=NEW Array(POOL);
193: for(int i=0; i<size; i+=2)
194: *locals_names+=SLA2S(locals_names_code, i);
195: }
1.10 paf 196:
1.76 paf 197: Method& method=*NEW Method(POOL,
198: *name,
1.81 paf 199: 0, 0/*min,max numbered_params_count*/,
1.76 paf 200: params_names, locals_names,
201: $7, 0);
1.34 paf 202: PC->vclass->add_method(*name, method);
1.8 paf 203: };
1.10 paf 204:
205: maybe_bracketed_strings: empty | bracketed_maybe_strings;
206: bracketed_maybe_strings: '[' maybe_strings ']' {$$=$2};
207: maybe_strings: empty | strings;
208: strings: STRING | strings ';' STRING { $$=$1; P($$, $3) };
209:
210: maybe_comment: empty | STRING;
1.1 paf 211:
212: /* codes */
213:
1.10 paf 214: maybe_codes: empty | codes;
215:
1.1 paf 216: codes: code | codes code {
217: $$=$1;
1.9 paf 218: P($$, $2);
1.1 paf 219: };
1.81 paf 220: code: write_string | action;
1.1 paf 221: action: get | put | with | call;
222:
223: /* get */
224:
1.64 paf 225: get: get_value {
226: $$=$1; /* stack: resulting value */
1.66 paf 227: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
1.1 paf 228: };
1.64 paf 229: get_value: '$' get_name_value { $$=$2 }
230: get_name_value: name_without_curly_rdive EON | name_in_curly_rdive;
1.1 paf 231: name_in_curly_rdive: '{' name_without_curly_rdive '}' { $$=$2 };
1.44 paf 232: name_without_curly_rdive:
233: name_without_curly_rdive_read
234: | name_without_curly_rdive_root
235: | name_without_curly_rdive_class;
1.19 paf 236: name_without_curly_rdive_read: name_without_curly_rdive_code {
1.25 paf 237: $$=N(POOL);
1.22 paf 238: Array *diving_code=$1;
1.82 paf 239: const String *first_name=SLA2S(diving_code);
1.85 ! paf 240: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 241: O($$, OP_WITH_SELF); /* stack: starting context */
1.22 paf 242: P($$, diving_code,
243: /* skip over... */
244: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
245: } else {
1.54 paf 246: O($$, OP_WITH_READ); /* stack: starting context */
1.22 paf 247: P($$, diving_code);
248: }
249: /* diving code; stack: current context */
1.1 paf 250: };
1.19 paf 251: name_without_curly_rdive_root: ':' name_without_curly_rdive_code {
1.25 paf 252: $$=N(POOL);
1.54 paf 253: O($$, OP_WITH_ROOT); /* stack: starting context */
1.19 paf 254: P($$, $2); /* diving code; stack: current context */
255: };
1.44 paf 256: name_without_curly_rdive_class: class_prefix name_without_curly_rdive_code { $$=$1; P($$, $2) };
1.19 paf 257: name_without_curly_rdive_code: name_advance2 | name_path name_advance2 { $$=$1; P($$, $2) };
1.1 paf 258:
259: /* put */
260:
1.81 paf 261: put: '$' name_expr_wdive construct {
1.20 paf 262: $$=$2; /* stack: context,name */
1.52 paf 263: P($$, $3); /* stack: context,name,constructor_value */
1.20 paf 264: };
1.44 paf 265: name_expr_wdive:
266: name_expr_wdive_write
267: | name_expr_wdive_root
268: | name_expr_wdive_class;
1.28 paf 269: name_expr_wdive_write: name_expr_dive_code {
1.44 paf 270: $$=N(POOL);
1.23 paf 271: Array *diving_code=$1;
1.82 paf 272: const String *first_name=SLA2S(diving_code);
1.85 ! paf 273: if(first_name && *first_name==SELF_ELEMENT_NAME) {
1.54 paf 274: O($$, OP_WITH_SELF); /* stack: starting context */
1.23 paf 275: P($$, diving_code,
276: /* skip over... */
277: diving_code->size()>2?3/*OP_+string+get_element*/:2/*OP_+string*/);
278: } else {
1.54 paf 279: O($$, OP_WITH_WRITE); /* stack: starting context */
1.23 paf 280: P($$, diving_code);
281: }
282: /* diving code; stack: current context */
1.20 paf 283: };
1.28 paf 284: name_expr_wdive_root: ':' name_expr_dive_code {
1.25 paf 285: $$=N(POOL);
1.54 paf 286: O($$, OP_WITH_ROOT); /* stack: starting context */
1.9 paf 287: P($$, $2); /* diving code; stack: context,name */
1.1 paf 288: };
1.44 paf 289: name_expr_wdive_class: class_prefix name_expr_dive_code { $$=$1; P($$, $2) };
1.20 paf 290:
1.81 paf 291: construct: construct_by_code | construct_by_expr;
292: construct_by_code: '[' any_constructor_code_value ']' {
293: $$=$2; /* stack: context, name, value */
294: O($$, OP_CONSTRUCT_VALUE); /* value=pop; name=pop; context=pop; construct(context,name,value) */
295: }
296: ;
297: construct_by_expr: '(' any_expr ')' {
298: $$=$2; /* stack: context, name, value */
299: O($$, OP_CONSTRUCT_EXPR); /* value=pop; name=pop; context=pop; construct(context,name,value) */
300: }
1.52 paf 301: ;
1.55 paf 302: any_constructor_code_value:
303: empty_string_value /* optimized $var[] case */
1.52 paf 304: | STRING /* optimized $var[STRING] case */
1.55 paf 305: | constructor_code_value /* $var[something complex] */
1.1 paf 306: ;
1.55 paf 307: constructor_code_value: constructor_code {
1.25 paf 308: $$=N(POOL);
1.54 paf 309: O($$, OP_CREATE_EWPOOL); /* stack: empty write context */
1.69 paf 310: P($$, $1); /* some code that writes to that context */
1.54 paf 311: O($$, OP_REDUCE_EWPOOL); /* context=pop; stack: context.value() */
1.1 paf 312: };
1.55 paf 313: constructor_code: codes__excluding_sole_str_literal;
1.27 paf 314: codes__excluding_sole_str_literal: action | code codes { $$=$1; P($$, $2) };
315:
1.1 paf 316: /* call */
317:
1.66 paf 318: call: call_value {
319: $$=$1; /* stack: value */
320: O($$, OP_WRITE); /* value=pop; wcontext.write(value) */
321: };
322: call_value: '^' call_name store_params EON { /* ^field.$method{vasya} */
1.42 paf 323: $$=$2; /* with_xxx,diving code; stack: context,method_junction */
1.54 paf 324: O($$, OP_GET_METHOD_FRAME); /* stack: context,method_frame */
1.9 paf 325: P($$, $3); /* filling method_frame.store_params */
1.66 paf 326: O($$, OP_CALL); /* method_frame=pop; ncontext=pop; call(ncontext,method_frame) stack: value */
1.1 paf 327: };
328:
1.43 paf 329: call_name: name_without_curly_rdive;
1.38 paf 330:
1.9 paf 331: store_params: store_param | store_params store_param { $$=$1; P($$, $2) };
1.69 paf 332: store_param:
333: store_square_param
334: | store_round_param
335: | store_curly_param
1.31 paf 336: ;
1.69 paf 337: store_square_param: '[' store_code_param_parts ']' {$$=$2};
338: store_round_param: '(' store_expr_param_parts ')' {$$=$2};
1.10 paf 339: store_curly_param: '{' maybe_codes '}' {
1.25 paf 340: $$=N(POOL);
1.29 paf 341: PCA($$, $2);
1.1 paf 342: };
1.69 paf 343: store_code_param_parts:
344: store_code_param_part
345: | store_code_param_parts ';' store_code_param_part { $$=$1; P($$, $3) }
346: ;
347: store_expr_param_parts:
348: store_expr_param_part
349: | store_expr_param_parts ';' store_expr_param_part { $$=$1; P($$, $3) }
350: ;
351: store_code_param_part:
1.78 paf 352: empty /* optimized [] case */
353: | STRING { /* optimized [STRING] case */
1.32 paf 354: $$=$1;
1.54 paf 355: O($$, OP_STORE_PARAM);
1.32 paf 356: }
1.78 paf 357: | constructor_code_value { /* [something complex] */
1.32 paf 358: $$=$1;
1.77 paf 359: O($$, OP_STORE_PARAM);
1.32 paf 360: }
361: ;
1.69 paf 362: store_expr_param_part: write_expr_value {
363: $$=N(POOL);
364: PCA($$, $1);
365: };
366: write_expr_value: any_expr {
367: $$=$1;
368: O($$, OP_WRITE);
369: };
1.1 paf 370:
371: /* name */
372:
1.20 paf 373: name_expr_dive_code: name_expr_value | name_path name_expr_value { $$=$1; P($$, $2) };
1.1 paf 374:
1.9 paf 375: name_path: name_step | name_path name_step { $$=$1; P($$, $2) };
1.1 paf 376: name_step: name_advance1 '.';
377: name_advance1: name_expr_value {
378: /* stack: context */
379: $$=$1; /* stack: context,name */
1.54 paf 380: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 381: };
382: name_advance2: name_expr_value {
383: /* stack: context */
384: $$=$1; /* stack: context,name */
1.54 paf 385: O($$, OP_GET_ELEMENT); /* name=pop; context=pop; stack: context.get_element(name) */
1.1 paf 386: }
1.4 paf 387: | STRING BOGUS
1.1 paf 388: ;
389: name_expr_value:
1.4 paf 390: STRING /* subname_is_const */
1.1 paf 391: | name_expr_subvar_value /* $subname_is_var_value */
392: | name_expr_with_subvar_value /* xxx$part_of_subname_is_var_value[$...] */
393: ;
394: name_expr_subvar_value: '$' subvar_ref_name_rdive {
395: $$=$2;
1.54 paf 396: O($$, OP_GET_ELEMENT);
1.1 paf 397: };
1.4 paf 398: name_expr_with_subvar_value: STRING subvar_get_writes {
1.25 paf 399: $$=N(POOL);
1.54 paf 400: O($$, OP_CREATE_EWPOOL);
1.9 paf 401: P($$, $1);
1.54 paf 402: O($$, OP_WRITE);
1.9 paf 403: P($$, $2);
1.54 paf 404: O($$, OP_REDUCE_EWPOOL);
1.1 paf 405: };
1.18 paf 406: subvar_ref_name_rdive: subvar_ref_name_rdive_read | subvar_ref_name_rdive_root;
407: subvar_ref_name_rdive_read: STRING {
1.25 paf 408: $$=N(POOL);
1.54 paf 409: O($$, OP_WITH_READ);
1.9 paf 410: P($$, $1);
1.1 paf 411: };
1.18 paf 412: subvar_ref_name_rdive_root: ':' STRING {
1.25 paf 413: $$=N(POOL);
1.54 paf 414: O($$, OP_WITH_ROOT);
1.18 paf 415: P($$, $2);
416: };
1.9 paf 417: subvar_get_writes: subvar__get_write | subvar_get_writes subvar__get_write { $$=$1; P($$, $2) };
1.1 paf 418: subvar__get_write: '$' subvar_ref_name_rdive {
419: $$=$2;
1.54 paf 420: O($$, OP_GET_ELEMENT__WRITE);
1.42 paf 421: };
422:
1.44 paf 423: class_prefix: STRING ':' {
1.72 paf 424: $$=$1; // stack: class name string
425: O($$, OP_GET_CLASS);
1.1 paf 426: };
427:
428:
429: /* with */
430:
431: with: '$' name_without_curly_rdive '{' codes '}' {
432: $$=$2;
1.54 paf 433: O($$, OP_CREATE_RWPOOL);
1.9 paf 434: P($$, $4);
1.54 paf 435: O($$, OP_REDUCE_RWPOOL);
436: O($$, OP_WRITE);
1.1 paf 437: };
1.53 paf 438:
1.56 paf 439: /* expr */
1.53 paf 440:
1.56 paf 441: any_expr:
1.55 paf 442: empty_double_value /* optimized $var() case */
1.81 paf 443: | expr_value /* $var(something) */
1.53 paf 444: ;
1.81 paf 445: expr_value: expr {
446: if(($$=$1)->size()==2) // only one string literal in there?
1.62 paf 447: change_string_literal_to_double_literal($$); // make that string literal Double
448: };
1.56 paf 449: expr:
1.62 paf 450: STRING
1.64 paf 451: | get_value
1.66 paf 452: | call_value
1.64 paf 453: | '"' string_inside_quotes_value '"' { $$ = $2; }
1.60 paf 454: | '(' expr ')' { $$ = $2; }
455: /* stack: operand // stack: @operand */
456: | '-' expr %prec NEG { $$=$2; O($$, OP_NEG) }
1.68 paf 457: | '~' expr { $$=$2; O($$, OP_INV) }
458: | '!' expr { $$=$2; O($$, OP_NOT) }
459: | "def" expr { $$=$2; O($$, OP_DEF) }
460: | "in" expr { $$=$2; O($$, OP_IN) }
461: | "-f" expr { $$=$2; O($$, OP_FEXISTS) }
1.60 paf 462: /* stack: a,b // stack: a@b */
463: | expr '-' expr { $$=$1; P($$, $3); O($$, OP_SUB) }
464: | expr '+' expr { $$=$1; P($$, $3); O($$, OP_ADD) }
465: | expr '*' expr { $$=$1; P($$, $3); O($$, OP_MUL) }
466: | expr '/' expr { $$=$1; P($$, $3); O($$, OP_DIV) }
467: | expr '%' expr { $$=$1; P($$, $3); O($$, OP_MOD) }
468: | expr '&' expr { $$=$1; P($$, $3); O($$, OP_BIN_AND) }
469: | expr '|' expr { $$=$1; P($$, $3); O($$, OP_BIN_OR) }
470: | expr '#' expr { $$=$1; P($$, $3); O($$, OP_BIN_XOR) }
471: | expr "&&" expr { $$=$1; P($$, $3); O($$, OP_LOG_AND) }
472: | expr "||" expr { $$=$1; P($$, $3); O($$, OP_LOG_OR) }
473: | expr "##" expr { $$=$1; P($$, $3); O($$, OP_LOG_XOR) }
474: | expr '<' expr { $$=$1; P($$, $3); O($$, OP_NUM_LT) }
475: | expr '>' expr { $$=$1; P($$, $3); O($$, OP_NUM_GT) }
476: | expr "<=" expr { $$=$1; P($$, $3); O($$, OP_NUM_LE) }
477: | expr ">=" expr { $$=$1; P($$, $3); O($$, OP_NUM_GE) }
478: | expr "==" expr { $$=$1; P($$, $3); O($$, OP_NUM_EQ) }
479: | expr "!=" expr { $$=$1; P($$, $3); O($$, OP_NUM_NE) }
1.61 paf 480: | expr "lt" expr { $$=$1; P($$, $3); O($$, OP_STR_LT) }
481: | expr "gt" expr { $$=$1; P($$, $3); O($$, OP_STR_GT) }
482: | expr "le" expr { $$=$1; P($$, $3); O($$, OP_STR_LE) }
483: | expr "ge" expr { $$=$1; P($$, $3); O($$, OP_STR_GE) }
484: | expr "eq" expr { $$=$1; P($$, $3); O($$, OP_STR_EQ) }
485: | expr "ne" expr { $$=$1; P($$, $3); O($$, OP_STR_NE) }
1.56 paf 486: ;
1.55 paf 487:
1.65 paf 488: string_inside_quotes_value: maybe_codes {
1.64 paf 489: $$=N(POOL);
490: O($$, OP_CREATE_SWPOOL); /* stack: empty write context */
1.69 paf 491: P($$, $1); /* some code that writes to that context */
1.64 paf 492: O($$, OP_REDUCE_SWPOOL); /* context=pop; stack: context.get_string() */
1.53 paf 493: };
1.1 paf 494:
1.27 paf 495: /* basics */
1.1 paf 496:
1.81 paf 497: write_string: STRING {
1.84 paf 498: // optimized from OP_STRING+OP_WRITE to OP_STRING__WRITE
499: change_string_literal_to_write_string_literal($$=$1)
1.54 paf 500: };
501:
1.79 paf 502: empty_double_value: /* empty */ { $$=VL(NEW VDouble(POOL, 0)) };
1.81 paf 503: empty_string_value: /* empty */ { $$=VL(NEW VString(POOL)) };
1.25 paf 504: empty: /* empty */ { $$=N(POOL) };
1.1 paf 505:
506: %%
507:
508: /*
509: 000$111(2222)00
510: 000$111{3333}00
1.9 paf 511: $,^: push,=0
1.1 paf 512: 1:( { break=pop
513: 2:( ) pop
514: 3:{ } pop
515:
516: 000^111(2222)4444{33333}4000
1.9 paf 517: $,^: push,=0
1.1 paf 518: 1:( { break=pop
519: 2:( )=4
520: 3:{ }=4
521: 4:[^({]=pop
522: */
523:
524: int yylex(YYSTYPE *lvalp, void *pc) {
525: #define lexical_brackets_nestage PC->brackets_nestages[PC->sp]
1.48 paf 526: #define RC {result=c; goto break2; }
1.1 paf 527:
528: register int c;
529: int result;
530:
531: if(PC->pending_state) {
532: result=PC->pending_state;
533: PC->pending_state=0;
534: return result;
535: }
536:
1.9 paf 537: char *begin=PC->source;
538: char *end;
539: int begin_line=PC->line;
1.67 paf 540: int skip_analized=0;
1.50 paf 541: while(true) {
1.9 paf 542: c=*(end=(PC->source++));
1.1 paf 543:
1.4 paf 544: if(c=='\n') {
1.1 paf 545: PC->line++;
1.8 paf 546: PC->col=0;
1.10 paf 547: } else
1.4 paf 548: PC->col++;
1.73 paf 549:
550: // todo: # in 0+1 column comment
1.1 paf 551:
1.48 paf 552: // escaping: ^^ ^$ ^; ^) ^} ^( ^{ ^"
553: if(c=='^')
554: switch(*PC->source) {
555: case '^': case '$': case ';':
556: case '[': case ']':
557: case '{': case '}':
558: case '"':
1.40 paf 559: if(end!=begin) {
560: // append piece till ^
561: PC->string->APPEND(begin, end-begin, PC->file, begin_line);
562: }
1.63 paf 563: // reset piece 'begin' position & line
1.40 paf 564: begin=PC->source; // ^
1.9 paf 565: begin_line=PC->line;
1.40 paf 566: // skip over ^ and _
1.50 paf 567: PC->source++; PC->col++;
1.40 paf 568: // skip analysis = forced literal
1.1 paf 569: continue;
570: }
571: switch(PC->ls) {
1.10 paf 572:
573: // USER'S = NOT OURS
1.1 paf 574: case LS_USER:
1.48 paf 575: switch(c) {
576: case '$':
1.10 paf 577: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 578: RC;
579: case '^':
580: push_LS(PC, LS_METHOD_NAME);
581: RC;
582: case '@':
583: if(PC->col==0+1) {
584: push_LS(PC, LS_DEF_NAME);
585: RC;
586: }
587: break;
1.1 paf 588: }
1.48 paf 589: break;
590:
591: // STRING IN EXPRESSION
592: case LS_EXPRESSION_STRING:
593: switch(c) {
594: case '"':
595: pop_LS(PC); //"abc".
596: RC;
597: case '$':
598: push_LS(PC, LS_VAR_NAME_SIMPLE);
599: RC;
600: case '^':
1.10 paf 601: push_LS(PC, LS_METHOD_NAME);
1.48 paf 602: RC;
1.10 paf 603: }
604: break;
605:
606: // METHOD DEFINITION
607: case LS_DEF_NAME:
1.48 paf 608: switch(c) {
609: case '[':
1.10 paf 610: PC->ls=LS_DEF_PARAMS;
1.48 paf 611: RC;
612: case '\n':
613: PC->ls=LS_DEF_SPECIAL_BODY;
614: RC;
1.10 paf 615: }
616: break;
1.48 paf 617:
1.10 paf 618: case LS_DEF_PARAMS:
1.48 paf 619: switch(c) {
620: case ';':
621: RC;
622: case ']':
1.10 paf 623: PC->ls=*PC->source=='['?LS_DEF_LOCALS:LS_DEF_COMMENT;
1.48 paf 624: RC;
1.49 paf 625: case '\n': // wrong. bailing out
1.10 paf 626: pop_LS(PC);
1.48 paf 627: RC;
1.10 paf 628: }
629: break;
1.48 paf 630:
1.10 paf 631: case LS_DEF_LOCALS:
1.48 paf 632: switch(c) {
633: case '[':
634: case ';':
635: RC;
636: case ']':
1.10 paf 637: PC->ls=LS_DEF_COMMENT;
1.48 paf 638: RC;
639: case '\n': // wrong. bailing out
1.10 paf 640: pop_LS(PC);
1.48 paf 641: RC;
1.10 paf 642: }
643: break;
1.48 paf 644:
1.10 paf 645: case LS_DEF_COMMENT:
646: if(c=='\n') {
647: pop_LS(PC);
1.48 paf 648: RC;
1.37 paf 649: }
650: break;
651:
1.48 paf 652: case LS_DEF_SPECIAL_BODY:
1.37 paf 653: if(c=='\n') {
1.48 paf 654: switch(*PC->source) {
655: case '@': case 0: // end of special_code
1.37 paf 656: pop_LS(PC);
1.48 paf 657: break;
658: }
659: RC;
660: }
661: break;
662:
663: // (EXPRESSION)
1.69 paf 664: case LS_VAR_ROUND:
665: case LS_METHOD_ROUND:
1.48 paf 666: switch(c) {
667: case ')':
668: if(--lexical_brackets_nestage==0)
1.69 paf 669: if(PC->ls==LS_METHOD_ROUND) // method round param ended
670: PC->ls=LS_METHOD_AFTER; // look for method end
671: else // PC->ls==LS_VAR_ROUND // variable constructor ended
672: pop_LS(PC); // return to normal life
1.48 paf 673: RC;
674: case '$':
1.69 paf 675: push_LS(PC, LS_EXPRESSION_VAR_NAME);
1.48 paf 676: RC;
677: case '^':
678: push_LS(PC, LS_METHOD_NAME);
679: RC;
680: case '(':
681: lexical_brackets_nestage++;
682: RC;
1.67 paf 683: case '-':
684: if(*PC->source=='f') { // -f
685: skip_analized=1;
686: result=FEXISTS;
687: } else
688: result=c;
689: goto break2;
690: case '+': case '*': case '/': case '%':
1.58 paf 691: case '~':
1.48 paf 692: case ';':
693: RC;
1.59 paf 694: case '&': case '|': case '#':
1.58 paf 695: if(*PC->source==c) { // && ||
1.59 paf 696: result=c=='#'?LXOR:c=='&'?LAND:LOR;
1.67 paf 697: skip_analized=1;
1.58 paf 698: } else
699: result=c;
700: goto break2;
701: case '<': case '>': case '=': case '!':
702: if(*PC->source=='=') { // <= >= == !=
1.67 paf 703: skip_analized=1;
1.58 paf 704: switch(c) {
705: case '<': result=NLE; break;
706: case '>': result=NGE; break;
707: case '=': result=NEQ; break;
708: case '!': result=NNE; break;
709: }
710: } else
711: result=c;
712: goto break2;
1.48 paf 713: case '"':
714: push_LS(PC, LS_EXPRESSION_STRING);
715: RC;
1.50 paf 716: case 'l': case 'g': case 'e': case 'n':
1.51 paf 717: if(end==begin) // right after whitespace
1.58 paf 718: switch(*PC->source) {
1.51 paf 719: // case '?': // ok [and bad cases, yacc would bark at them]
720: case 't': // lt gt [et nt]
1.62 paf 721: result=c=='l'?SLT:c=='g'?SGT:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 722: skip_analized=1;
1.58 paf 723: goto break2;
1.51 paf 724: case 'e': // le ge ne [ee]
1.58 paf 725: result=c=='l'?SLE:c=='g'?SGE:c=='n'?SNE:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 726: skip_analized=1;
1.58 paf 727: goto break2;
1.51 paf 728: case 'q': // eq [lq gq nq]
1.58 paf 729: result=c=='e'?SEQ:BAD_STRING_COMPARISON_OPERATOR;
1.67 paf 730: skip_analized=1;
731: goto break2;
732: }
733: break;
734: case 'i':
735: if(end==begin) // right after whitespace
736: if(PC->source[0]=='n') { // in
737: skip_analized=1;
738: result=IN;
739: goto break2;
740: }
741: break;
742: case 'd':
743: if(end==begin) // right after whitespace
744: if(PC->source[0]=='e' && PC->source[1]=='f') { // def
745: skip_analized=2;
746: result=DEF;
1.58 paf 747: goto break2;
1.50 paf 748: }
1.48 paf 749: break;
750: case ' ': case '\t': case '\n':
1.63 paf 751: if(end!=begin) { // there were a string after previous operator?
752: result=0; // return that string
753: goto break2;
1.48 paf 754: }
1.63 paf 755: // that's a leading|traling space or after-operator-space
756: // ignoring it
757: // reset piece 'begin' position & line
1.58 paf 758: begin=PC->source; // after whitespace char
1.48 paf 759: begin_line=PC->line;
760: continue;
1.1 paf 761: }
762: break;
763:
1.10 paf 764: // VARIABLE GET/PUT/WITH
1.1 paf 765: case LS_VAR_NAME_SIMPLE:
1.69 paf 766: case LS_EXPRESSION_VAR_NAME:
767: if(PC->ls==LS_EXPRESSION_VAR_NAME) {
1.56 paf 768: // name in expr ends also before binary operators
1.48 paf 769: switch(c) {
770: case '+': case '-': case '*': case '/': case '%':
771: case '&': case '|':
1.83 paf 772: case '=': case '!':
1.48 paf 773: pop_LS(PC);
774: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
775: result=EON;
776: goto break2;
777: }
778: }
779: switch(c) {
780: case 0:
781: case ' ': case '\t': case '\n':
782: case ';':
1.64 paf 783: case ']': case '}': case ')': case '"':
1.83 paf 784: case '<': case '>': // these stand for HTML brackets and expression binary ops
1.1 paf 785: pop_LS(PC);
1.32 paf 786: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 787: result=EON;
1.1 paf 788: goto break2;
1.48 paf 789: case '[':
790: PC->ls=LS_VAR_SQUARE;
1.1 paf 791: lexical_brackets_nestage=1;
1.48 paf 792: RC;
793: case '{':
794: if(begin==end) { // ${name}, no need of EON, switching LS
795: PC->ls=LS_VAR_NAME_CURLY;
796: } else {
797: PC->ls=LS_VAR_CURLY;
798: lexical_brackets_nestage=1;
799: }
1.69 paf 800:
1.48 paf 801: RC;
802: case '(':
1.69 paf 803: PC->ls=LS_VAR_ROUND;
1.1 paf 804: lexical_brackets_nestage=1;
1.48 paf 805: RC;
806: case '.': // name part delim
807: case '$': // name part subvar
808: case ':': // ':name' or 'class:name'
809: RC;
1.1 paf 810: }
811: break;
1.48 paf 812:
1.1 paf 813: case LS_VAR_NAME_CURLY:
1.48 paf 814: switch(c) {
815: case '}': // ${name} finished, restoring LS
1.1 paf 816: pop_LS(PC);
1.48 paf 817: RC;
818: case '.': // name part delim
819: case '$': // name part subvar
820: case ':': // ':name' or 'class:name'
821: RC;
1.1 paf 822: }
823: break;
1.48 paf 824:
825: case LS_VAR_SQUARE:
826: switch(c) {
827: case '$':
1.10 paf 828: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 829: RC;
830: case '^':
1.10 paf 831: push_LS(PC, LS_METHOD_NAME);
1.48 paf 832: RC;
833: case ']':
1.1 paf 834: if(--lexical_brackets_nestage==0) {
835: pop_LS(PC);
1.48 paf 836: RC;
1.1 paf 837: }
1.48 paf 838: break;
839: case ';': // operator_or_fmt;value delim
840: RC;
841: case '[':
842: lexical_brackets_nestage++;
843: break;
1.1 paf 844: }
845: break;
1.48 paf 846:
1.1 paf 847: case LS_VAR_CURLY:
1.48 paf 848: switch(c) {
849: case '$':
1.10 paf 850: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 851: RC;
852: case '^':
1.10 paf 853: push_LS(PC, LS_METHOD_NAME);
1.48 paf 854: RC;
855: case '}':
1.1 paf 856: if(--lexical_brackets_nestage==0) {
857: pop_LS(PC);
1.48 paf 858: RC;
1.1 paf 859: }
1.48 paf 860: break;
861: case '{':
1.1 paf 862: lexical_brackets_nestage++;
1.48 paf 863: break;
864: }
1.1 paf 865: break;
866:
1.10 paf 867: // METHOD CALL
1.1 paf 868: case LS_METHOD_NAME:
1.48 paf 869: switch(c) {
870: case '[':
871: PC->ls=LS_METHOD_SQUARE;
1.1 paf 872: lexical_brackets_nestage=1;
1.48 paf 873: RC;
874: case '{':
1.1 paf 875: PC->ls=LS_METHOD_CURLY;
876: lexical_brackets_nestage=1;
1.48 paf 877: RC;
1.69 paf 878: case '(':
879: PC->ls=LS_METHOD_ROUND;
880: lexical_brackets_nestage=1;
881: RC;
1.48 paf 882: case '.': // name part delim
883: case '$': // name part subvar
884: case ':': // ':name' or 'class:name'
885: RC;
1.1 paf 886: }
887: break;
1.48 paf 888:
889: case LS_METHOD_SQUARE:
890: switch(c) {
891: case '$':
1.10 paf 892: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 893: RC;
894: case '^':
1.10 paf 895: push_LS(PC, LS_METHOD_NAME);
1.48 paf 896: RC;
897: case ';': // param delim
898: RC;
899: case ']':
1.1 paf 900: if(--lexical_brackets_nestage==0) {
901: PC->ls=LS_METHOD_AFTER;
1.48 paf 902: RC;
1.1 paf 903: }
1.48 paf 904: break;
905: case '[':
1.1 paf 906: lexical_brackets_nestage++;
1.48 paf 907: break;
908: }
1.1 paf 909: break;
1.48 paf 910:
1.1 paf 911: case LS_METHOD_CURLY:
1.48 paf 912: switch(c) {
913: case '$':
1.10 paf 914: push_LS(PC, LS_VAR_NAME_SIMPLE);
1.48 paf 915: RC;
916: case '^':
1.10 paf 917: push_LS(PC, LS_METHOD_NAME);
1.48 paf 918: RC;
919: case '}':
1.1 paf 920: if(--lexical_brackets_nestage==0) {
921: PC->ls=LS_METHOD_AFTER;
1.48 paf 922: RC;
1.1 paf 923: }
1.48 paf 924: break;
925: case '{':
1.1 paf 926: lexical_brackets_nestage++;
1.48 paf 927: break;
928: }
1.1 paf 929: break;
1.48 paf 930:
1.1 paf 931: case LS_METHOD_AFTER:
1.69 paf 932: if(c=='[') {/* ][ }[ )[ */
1.48 paf 933: PC->ls=LS_METHOD_SQUARE;
1.1 paf 934: lexical_brackets_nestage=1;
1.48 paf 935: RC;
1.1 paf 936: }
1.69 paf 937: if(c=='{') {/* ]{ }{ ){ */
1.1 paf 938: PC->ls=LS_METHOD_CURLY;
1.69 paf 939: lexical_brackets_nestage=1;
940: RC;
941: }
942: if(c=='(') {/* ]( }( )( */
943: PC->ls=LS_METHOD_ROUND;
1.1 paf 944: lexical_brackets_nestage=1;
1.48 paf 945: RC;
1.1 paf 946: }
947: pop_LS(PC);
1.32 paf 948: PC->source--; if(--PC->col<0) { PC->line--; PC->col=-1; }
1.13 paf 949: result=EON;
1.1 paf 950: goto break2;
951: }
1.9 paf 952: if(c==0) {
1.1 paf 953: result=-1;
954: break;
955: }
956: }
957:
958: break2:
1.59 paf 959: if(end!=begin) { // there is last piece?
960: if((c=='@' || c==0) && end[-1]=='\n') { // we are before LS_DEF_NAME or EOF?
961: // strip last \n
1.10 paf 962: end--;
1.59 paf 963: }
964: if(end!=begin) { // last piece still alive?
965: // append it
1.30 paf 966: PC->string->APPEND(begin, end-begin, PC->file, begin_line/*, start_col*/);
967: }
1.59 paf 968: }
969: if(PC->string->size()) { // something accumulated?
1.17 paf 970: // create STRING value: array of OP_VALUE+vstring
1.55 paf 971: *lvalp=VL(NEW VString(*PC->string));
1.10 paf 972: // new pieces storage
1.25 paf 973: PC->string=NEW String(POOL);
1.58 paf 974: // make current result be pending for next call, return STRING for now
975: PC->pending_state=result; result=STRING;
976: }
1.67 paf 977: if(skip_analized) {
978: PC->source+=skip_analized; PC->col+=skip_analized;
1.1 paf 979: }
1.58 paf 980: return result;
1.1 paf 981: }
982:
1.9 paf 983: int real_yyerror(parse_control *pc, char *s) /* Called by yyparse on error */
1.1 paf 984: {
1.16 paf 985: //fprintf(stderr, "[%s]\n", s);
1.6 paf 986:
1.46 paf 987: strncpy(pc->error, s, MAX_STRING); // TODO: перепроверить с треклятым последним байтом
1.1 paf 988: return 1;
989: }
990:
991: static void
1.9 paf 992: yyprint(
1.1 paf 993: FILE *file,
994: int type,
995: YYSTYPE value)
996: {
1.9 paf 997: if(type==STRING)
1.38 paf 998: fprintf(file, " \"%s\"", SLA2S(value)->cstr());
1.1 paf 999: }
1000:
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