Annotation of parser3/src/main/pa_string.C, revision 1.211
1.45 paf 1: /** @file
1.174 paf 2: Parser: string class. @see untalength_t.C.
1.46 paf 3:
1.203 paf 4: Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com)
1.138 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.164 paf 6: */
1.46 paf 7:
1.211 ! misha 8: static const char * const IDENT_STRING_C="$Date: 2008-07-16 17:06:28 $";
1.4 paf 9:
1.70 paf 10: #include "pcre.h"
11:
1.12 paf 12: #include "pa_string.h"
1.22 paf 13: #include "pa_exception.h"
1.61 paf 14: #include "pa_table.h"
1.101 parser 15: #include "pa_dictionary.h"
1.132 paf 16: #include "pa_charset.h"
1.60 paf 17:
1.185 paf 18: const String String::Empty;
19:
1.193 paf 20: int pa_atoi(const char* str, const String* problem_source) {
21: if(!str)
22: return 0;
23:
1.199 paf 24: while(*str && isspace((unsigned char)*str))
1.193 paf 25: str++;
26: if(!*str)
27: return 0;
28:
29: int result;
30: char *error_pos;
1.200 paf 31: bool negative=false;
32: if(str[0]=='-') {
33: negative=true;
34: str++;
35: } else if(str[0]=='+') {
36: str++;
37: }
1.193 paf 38: // 0xABC
39: if(str[0]=='0')
40: if(str[1]=='x' || str[1]=='X')
41: result=(int)(unsigned long)strtol(str, &error_pos, 0);
1.197 paf 42: else {
43: // skip leading 0000, to disable octal interpretation
44: do str++; while(*str=='0');
45: result=(int)strtol(str, &error_pos, 0);
46: }
1.193 paf 47: else
48: result=(int)strtol(str, &error_pos, 0);
1.200 paf 49: if(negative)
50: result=-result;
1.193 paf 51:
52: while(char c=*error_pos++)
1.199 paf 53: if(!isspace((unsigned char)c))
1.193 paf 54: throw Exception("number.format",
55: problem_source,
56: problem_source?"invalid number (int)": "'%s' is invalid number (int)", str);
57:
58: return result;
59: }
60:
61: double pa_atod(const char* str, const String* problem_source) {
62: if(!str)
63: return 0;
64:
1.199 paf 65: while(*str && isspace((unsigned char)*str))
1.193 paf 66: str++;
67: if(!*str)
68: return 0;
69:
70: double result;
71: char *error_pos;
1.200 paf 72: bool negative=false;
73: if(str[0]=='-') {
74: negative=true;
75: str++;
76: } else if(str[0]=='+') {
77: str++;
78: }
1.193 paf 79: // 0xABC
80: if(str[0]=='0')
81: if(str[1]=='x' || str[1]=='X')
82: result=(double)(unsigned long)strtol(str, &error_pos, 0);
1.200 paf 83: else {
84: // skip leading 0000, to disable octal interpretation
85: do str++; while(*str=='0');
86: result=(double)strtod(str, &error_pos);
87: }
1.193 paf 88: else
89: result=(double)strtod(str, &error_pos);
1.200 paf 90: if(negative)
91: result=-result;
1.193 paf 92:
93: while(char c=*error_pos++)
1.199 paf 94: if(!isspace((unsigned char)c))
1.193 paf 95: throw Exception("number.format",
96: problem_source,
97: problem_source?"invalid number (double)": "'%s' is invalid number (double)", str);
98:
99: return result;
100: }
101:
1.176 paf 102: // cord lib extension
103:
104: #ifndef DOXYGEN
105: typedef struct {
106: ssize_t countdown;
1.204 paf 107: int target; /* Character we're looking for */
1.176 paf 108: } chr_data;
109: #endif
110: static int CORD_range_contains_chr_greater_then_proc(char c, size_t size, void* client_data)
111: {
112: register chr_data * d = (chr_data *)client_data;
113:
114: if (d -> countdown<=0) return(2);
115: d -> countdown -= size;
116: if (c > d -> target) return(1);
117: return(0);
118: }
119: int CORD_range_contains_chr_greater_then(CORD x, size_t i, size_t n, int c)
120: {
121: chr_data d;
122:
123: d.countdown = n;
124: d.target = c;
125: return(CORD_block_iter(x, i, CORD_range_contains_chr_greater_then_proc, &d) == 1/*alternatives: 0 normally ended, 2=struck 'n'*/);
126: }
127:
1.187 paf 128: static int CORD_block_count_proc(char /*c*/, size_t /*size*/, void* client_data)
1.178 paf 129: {
130: int* result=(int*)client_data;
131: (*result)++;
132: return(0); // 0=continue
133: }
134: size_t CORD_block_count(CORD x)
135: {
136: size_t result=0;
137: CORD_block_iter(x, 0, CORD_block_count_proc, &result);
138: return result;
139: }
140:
1.174 paf 141: // helpers
1.139 paf 142:
1.174 paf 143: /// String::match uses this as replace & global search table columns
1.139 paf 144:
1.174 paf 145: const int MAX_MATCH_GROUPS=100;
1.139 paf 146:
1.174 paf 147: class String_match_table_template_columns: public ArrayString {
148: public:
149: String_match_table_template_columns() {
150: *this+=new String("prematch");
151: *this+=new String("match");
152: *this+=new String("postmatch");
153: for(int i=0; i<MAX_MATCH_GROUPS; i++) {
1.176 paf 154: *this+=new String(String::Body::Format(1+i), String::L_CLEAN);
1.174 paf 155: }
156: }
157: };
158:
159: Table string_match_table_template(new String_match_table_template_columns);
160:
1.176 paf 161: // String::Body methods
1.140 paf 162:
1.176 paf 163: String::Body String::Body::Format(int value) {
1.174 paf 164: char local[MAX_NUMBER];
165: size_t length=snprintf(local, MAX_NUMBER, "%d", value);
1.176 paf 166: return String::Body(pa_strdup(local, length), length);
1.120 paf 167: }
168:
1.195 paf 169: String::Body String::Body::trim(String::Trim_kind kind, const char* chars,
170: size_t* out_start, size_t* out_length) const {
171: size_t our_length=length();
172: if(!our_length)
173: return *this;
174: if(!chars)
175: chars=" \t\n"; // white space
176:
177: size_t start=0;
178: size_t end=our_length;
1.196 paf 179: // from left...
180: if(kind!=TRIM_END) {
1.195 paf 181: CORD_pos pos; set_pos(pos, 0);
182: while(true) {
183: char c=CORD_pos_fetch(pos);
184: if(strchr(chars, c)) {
185: if(++start==our_length)
186: return 0; // all chars are empty, just return empty string
187: } else
188: break;
189:
190: CORD_next(pos);
191: }
192: }
1.196 paf 193: // from right..
194: if(kind!=TRIM_START) {
195: CORD_pos pos; set_pos(pos, end-1);
196: while(true) {
197: char c=CORD_pos_fetch(pos);
198: if(strchr(chars, c)) {
199: if(--end==0) // optimization: NO need to check for 'end>=start', that's(<) impossible
200: return 0; // all chars are empty, just return empty string
201: } else
202: break;
203:
204: CORD_prev(pos);
205: }
206: }
1.195 paf 207:
208: if(start==0 && end==our_length) // nobody moved a thing
209: return *this;
210:
211: if(out_start)
212: *out_start=start;
213: size_t new_length=end-start;
214: if(out_length)
215: *out_length=new_length;
216:
217: return mid(start, new_length);
218: }
219:
1.174 paf 220: static int CORD_batched_iter_fn_generic_hash_code(char c, void * client_data) {
221: uint& result=*static_cast<uint*>(client_data);
222: generic_hash_code(result, c);
223: return 0;
224: }
225: static int CORD_batched_iter_fn_generic_hash_code(const char* s, void * client_data) {
226: uint& result=*static_cast<uint*>(client_data);
227: generic_hash_code(result, s);
228: return 0;
229: };
1.176 paf 230: uint String::Body::hash_code() const {
1.174 paf 231: uint result=0;
232: CORD_iter5(body, 0,
233: CORD_batched_iter_fn_generic_hash_code,
234: CORD_batched_iter_fn_generic_hash_code, &result);
1.120 paf 235: return result;
1.94 parser 236: }
237:
1.174 paf 238: // String methods
239:
240: String::String(const char* cstr, size_t helper_length, bool tainted): body(CORD_EMPTY) {
241: append_help_length(cstr, helper_length, tainted?L_TAINTED:L_CLEAN);
1.115 paf 242: }
1.174 paf 243: String::String(const String::C cstr, bool tainted): body(CORD_EMPTY) {
244: append_know_length(cstr.str, cstr.length, tainted?L_TAINTED:L_CLEAN);
1.5 paf 245: }
1.28 paf 246:
1.174 paf 247: String& String::append_know_length(const char* str, size_t known_length, Language lang) {
248: if(!known_length)
1.9 paf 249: return *this;
1.122 paf 250:
1.176 paf 251: // first: langs
252: langs.append(body, lang, known_length);
253: // next: letters themselves
1.174 paf 254: body.append_know_length(str, known_length);
1.1 paf 255:
1.174 paf 256: ASSERT_STRING_INVARIANT(*this);
1.1 paf 257: return *this;
258: }
1.174 paf 259: String& String::append_help_length(const char* str, size_t helper_length, Language lang) {
260: if(!str)
261: return *this;
262: size_t known_length=helper_length?helper_length:strlen(str);
263: if(!known_length)
264: return *this;
1.1 paf 265:
1.174 paf 266: return append_know_length(str, known_length, lang);
1.5 paf 267: }
1.174 paf 268: String& String::append_strdup(const char* str, size_t helper_length, Language lang) {
269: size_t known_length=helper_length?helper_length:strlen(str);
270: if(!known_length)
271: return *this;
1.5 paf 272:
1.176 paf 273: // first: langs
274: langs.append(body, lang, known_length);
275: // next: letters themselves
1.174 paf 276: body.append_strdup_know_length(str, known_length);
1.33 paf 277:
1.174 paf 278: ASSERT_STRING_INVARIANT(*this);
279: return *this;
1.5 paf 280: }
1.46 paf 281:
1.210 misha 282: size_t String::length(Charset& charset) const {
283: if(charset.isUTF8()){
284: const XMLByte* srcPtr=(const XMLByte*)cstrm();
285: return lengthUTF8(srcPtr, srcPtr+body.length());
286: } else
287: return body.length();
288: }
289:
1.174 paf 290: /// @todo check in doc: whether it documents NOW bad situation "abc".mid(-1, 3) =were?="ab"
291: String& String::mid(size_t substr_begin, size_t substr_end) const {
292: String& result=*new String;
293:
294: size_t self_length=length();
295: substr_begin=min(substr_begin, self_length);
296: substr_end=min(max(substr_end, substr_begin), self_length);
1.176 paf 297: size_t substr_length=substr_end-substr_begin;
298: if(!substr_length)
1.107 parser 299: return result;
1.53 paf 300:
1.176 paf 301: // first: their langs
302: result.langs.append(result.body, langs, substr_begin, substr_length);
303: // next: letters themselves
304: result.body=body.mid(substr_begin, substr_length);
1.174 paf 305:
306: ASSERT_STRING_INVARIANT(result);
1.53 paf 307: return result;
1.54 paf 308: }
309:
1.211 ! misha 310: // from, to and helper_length in characters, not in bytes (it's important for utf-8)
! 311: String& String::mid(Charset& charset, size_t from, size_t to, size_t helper_length) const {
1.210 misha 312: String& result=*new String;
313:
1.211 ! misha 314: size_t self_length=(helper_length)?helper_length:length(charset);
! 315:
! 316: if(!self_length)
! 317: return result;
! 318:
! 319: from=min(min(to, from), self_length);
1.210 misha 320: to=min(max(to, from), self_length);
1.211 ! misha 321:
1.210 misha 322: size_t substr_length=to-from;
1.211 ! misha 323:
1.210 misha 324: if(!substr_length)
325: return result;
326:
327: if(charset.isUTF8()){
328: const XMLByte* srcPtr=(const XMLByte*)cstrm();
1.211 ! misha 329: const XMLByte* srcEnd=srcPtr+body.length();
1.210 misha 330:
1.211 ! misha 331: // convert from and substr_length from 'characters' to 'bytes'
1.210 misha 332: from=getUTF8BytePos(srcPtr, srcEnd, from);
333: substr_length=getUTF8BytePos(srcPtr+from, srcEnd, substr_length);
334: if(!substr_length)
335: return result;
336: }
337:
338: // first: their langs
339: result.langs.append(result.body, langs, from, substr_length);
340: // next: letters themselves
341: result.body=body.mid(from, substr_length);
342:
343: ASSERT_STRING_INVARIANT(result);
344: return result;
345: }
346:
1.176 paf 347: size_t String::pos(const String::Body substr, size_t this_offset, Language lang) const {
1.183 paf 348: size_t substr_length=substr.length();
349: while(true) {
350: size_t substr_begin=body.pos(substr, this_offset);
351:
352: if(substr_begin==CORD_NOT_FOUND)
353: return STRING_NOT_FOUND;
1.174 paf 354:
1.183 paf 355: if(langs.check_lang(lang, substr_begin, substr_length))
356: return substr_begin;
357:
358: this_offset=substr_begin+substr_length;
359: }
1.58 paf 360: }
361:
1.174 paf 362: size_t String::pos(const String& substr,
363: size_t this_offset, Language lang) const {
364: return pos(substr.body, this_offset, lang);
1.60 paf 365: }
366:
1.210 misha 367: size_t String::pos(Charset& charset, const String& substr,
368: size_t this_offset, Language lang) const {
369:
370: size_t result=pos(substr.body, this_offset, lang);
371: if(result==CORD_NOT_FOUND)
372: return STRING_NOT_FOUND;
373:
374: if(charset.isUTF8()){
375: const XMLByte* srcPtr=(const XMLByte*)cstrm();
376: result=getUTF8CharPos(srcPtr, srcPtr+body.length(), result);
377: }
378:
379: return result;
380: }
381:
1.174 paf 382: void String::split(ArrayString& result,
383: size_t& pos_after,
384: const char* delim,
385: Language lang, int limit) const {
386: size_t self_length=length();
387: if(size_t delim_length=strlen(delim)) {
1.186 paf 388: size_t pos_before;
1.60 paf 389: // while we have 'delim'...
1.174 paf 390: for(; (pos_before=pos(delim, pos_after, lang))!=STRING_NOT_FOUND && limit; limit--) {
1.69 paf 391: result+=&mid(pos_after, pos_before);
1.174 paf 392: pos_after=pos_before+delim_length;
1.60 paf 393: }
394: // last piece
1.174 paf 395: if(pos_after<self_length && limit) {
396: result+=&mid(pos_after, self_length);
397: pos_after=self_length;
1.60 paf 398: }
399: } else { // empty delim
400: result+=this;
1.174 paf 401: pos_after+=self_length;
1.60 paf 402: }
403: }
404:
1.174 paf 405: void String::split(ArrayString& result,
406: size_t& pos_after,
407: const String& delim, Language lang,
408: int limit) const {
1.140 paf 409: if(!delim.is_empty()) {
1.186 paf 410: size_t pos_before;
1.60 paf 411: // while we have 'delim'...
1.174 paf 412: for(; (pos_before=pos(delim, pos_after, lang))!=STRING_NOT_FOUND && limit; limit--) {
1.69 paf 413: result+=&mid(pos_after, pos_before);
1.174 paf 414: pos_after=pos_before+delim.length();
1.60 paf 415: }
416: // last piece
1.174 paf 417: if(pos_after<length() && limit) {
418: result+=&mid(pos_after, length());
419: pos_after=length();
1.60 paf 420: }
421: } else { // empty delim
422: result+=this;
1.174 paf 423: pos_after+=length();
1.60 paf 424: }
1.61 paf 425: }
426:
1.209 misha 427: enum Match_feature {
428: MF_NEED_PRE_POST_MATCH = 0x01,
429: MF_JUST_COUNT_MATCHES = 0x02
430: };
431:
432: static void regex_options(const String* options, int* result, int* match_features){
1.63 paf 433: struct Regex_option {
1.174 paf 434: const char* keyL;
435: const char* keyU;
1.209 misha 436: int clear;
437: int set;
1.63 paf 438: int *result;
1.209 misha 439: int flag;
1.63 paf 440: } regex_option[]={
1.189 paf 441: {"i", "I", 0, PCRE_CASELESS, result, 0}, // a=A
442: {"s", "S", 0, PCRE_DOTALL, result, 0}, // \n\n$ [default]
443: {"x", "U", 0, PCRE_EXTENDED, result, 0}, // whitespace in regex ignored
444: {"m", "M", PCRE_DOTALL, PCRE_MULTILINE, result, 0}, // ^aaa\n$^bbb\n$
445: {"g", "G", 0, 1, result+1, 0}, // many rows
1.209 misha 446: {"'", 0, 0, 0, 0, MF_NEED_PRE_POST_MATCH},
447: {"n", "N", 0, 0, 0, MF_JUST_COUNT_MATCHES},
1.189 paf 448: {0, 0, 0, 0, 0, 0}
1.63 paf 449: };
1.171 paf 450: result[0]=PCRE_EXTRA | PCRE_DOTALL | PCRE_DOLLAR_ENDONLY;
1.63 paf 451: result[1]=0;
452:
1.174 paf 453: if(options && !options->is_empty())
1.153 paf 454: for(Regex_option *o=regex_option; o->keyL; o++)
1.209 misha 455: if(
456: options->pos(o->keyL)!=STRING_NOT_FOUND
457: || (o->keyU && options->pos(o->keyU)!=STRING_NOT_FOUND)
458: ){
459: if(o->flag){
460: (*match_features) |= o->flag;
461: } else {
1.154 paf 462: *o->result &= ~o->clear;
463: *o->result |= o->set;
464: }
1.63 paf 465: }
466: }
467:
1.174 paf 468: Table* String::match(Charset& source_charset,
469: const String& regexp,
470: const String* options,
471: Row_action row_action, void *info,
1.209 misha 472: int& matches_count) const {
1.140 paf 473: if(regexp.is_empty())
1.149 paf 474: throw Exception(0,
1.174 paf 475: 0,
1.73 paf 476: "regexp is empty");
1.154 paf 477:
1.205 paf 478: const char* pattern=regexp.cstr(String::L_UNSPECIFIED); // fix any tainted with L_REGEX
1.174 paf 479: const char* errptr;
1.62 paf 480: int erroffset;
1.209 misha 481: int option_bits[2]={0};
482: int match_features=0;
483: regex_options(options, option_bits, &match_features);
484: bool need_pre_post_match=(match_features & MF_NEED_PRE_POST_MATCH) != 0;
485: bool just_count_matches=(match_features & MF_JUST_COUNT_MATCHES) != 0;
1.174 paf 486: bool global=option_bits[1]!=0;
1.63 paf 487: pcre *code=pcre_compile(pattern, option_bits[0],
1.62 paf 488: &errptr, &erroffset,
1.174 paf 489: source_charset.pcre_tables);
1.62 paf 490:
1.67 paf 491: if(!code)
1.149 paf 492: throw Exception(0,
1.174 paf 493: ®exp.mid(erroffset, regexp.length()),
1.74 paf 494: "regular expression syntax error - %s", errptr);
1.62 paf 495:
1.174 paf 496: int subpatterns=pcre_info(code, 0, 0);
497: if(subpatterns<0) {
1.100 parser 498: pcre_free(code);
1.149 paf 499: throw Exception(0,
1.174 paf 500: ®exp,
1.76 paf 501: "pcre_info error (%d)",
1.174 paf 502: subpatterns);
1.63 paf 503: }
504:
1.174 paf 505: const char* subject=cstr();
506: size_t subject_length=strlen(subject);
507: const int oveclength=(1/*match*/+MAX_MATCH_GROUPS)*3;
508: int ovector[oveclength];
1.155 paf 509:
510: // create table
1.173 paf 511: Table::Action_options table_options;
1.174 paf 512: Table& table=*new Table(string_match_table_template, table_options);
1.63 paf 513:
1.64 paf 514: int exec_option_bits=0;
1.154 paf 515: int prestart=0;
516: int poststart=0;
1.174 paf 517: int postfinish=length();
1.63 paf 518: while(true) {
519: int exec_substrings=pcre_exec(code, 0,
1.174 paf 520: subject, subject_length, prestart,
521: exec_option_bits, ovector, oveclength);
1.63 paf 522:
523: if(exec_substrings==PCRE_ERROR_NOMATCH) {
1.100 parser 524: pcre_free(code);
1.174 paf 525: row_action(table, 0/*last time, no raw*/, 0, 0, poststart, postfinish, info);
1.208 misha 526: // if(global || subpatterns)
527: // return &table; // global or with subpatterns=true+result
528: // else {
529: // just_matched=false; return 0; // not global=no result
530: // }
1.209 misha 531: return just_count_matches ? 0 : &table;
1.63 paf 532: }
533:
534: if(exec_substrings<0) {
1.100 parser 535: pcre_free(code);
1.149 paf 536: throw Exception(0,
1.174 paf 537: ®exp,
1.76 paf 538: "regular expression execute error (%d)",
1.63 paf 539: exec_substrings);
540: }
541:
1.154 paf 542: int prefinish=ovector[0];
543: poststart=ovector[1];
1.174 paf 544: ArrayString* row=new ArrayString;
545: if(need_pre_post_match) {
546: *row+=&mid(0, prefinish); // .prematch column value
547: *row+=&mid(prefinish, poststart); // .match
548: *row+=&mid(poststart, postfinish); // .postmatch
549: } else {
1.185 paf 550: *row+=&Empty; // .prematch column value
551: *row+=&Empty; // .match
552: *row+=&Empty; // .postmatch
1.174 paf 553: }
1.63 paf 554:
555: for(int i=1; i<exec_substrings; i++) {
1.69 paf 556: // -1:-1 case handled peacefully by mid() itself
1.174 paf 557: *row+=&mid(ovector[i*2+0], ovector[i*2+1]); // .i column value
1.63 paf 558: }
559:
1.209 misha 560: matches_count++;
1.174 paf 561: row_action(table, row, prestart, prefinish, poststart, postfinish, info);
1.63 paf 562:
1.174 paf 563: if(!global || prestart==poststart) { // not global | going to hang
1.100 parser 564: pcre_free(code);
1.174 paf 565: row_action(table, 0/*last time, no row*/, 0, 0, poststart, postfinish, info);
1.209 misha 566: return just_count_matches ? 0 : &table;
567: // return &table;
1.63 paf 568: }
1.154 paf 569: prestart=poststart;
1.63 paf 570:
571: /*
572: if(option_bits[0] & PCRE_MULTILINE)
1.64 paf 573: exec_option_bits|=PCRE_NOTBOL; // start of subject+startoffset not BOL
1.63 paf 574: */
575: }
1.82 parser 576: }
577:
1.174 paf 578: String& String::change_case(Charset& source_charset, Change_case_kind kind) const {
579: String& result=*new String();
580: if(is_empty())
581: return result;
582:
583: char* new_cstr=cstrm();
1.192 paf 584: size_t new_cstr_len=length();
1.181 paf 585: if(source_charset.isUTF8()) {
586: switch(kind) {
587: case CC_UPPER:
1.192 paf 588: change_case_UTF8((const XMLByte*)new_cstr, new_cstr_len, (XMLByte*)new_cstr, new_cstr_len, UTF8CaseToUpper);
1.181 paf 589: break;
590: case CC_LOWER:
1.192 paf 591: change_case_UTF8((const XMLByte*)new_cstr, new_cstr_len, (XMLByte*)new_cstr, new_cstr_len, UTF8CaseToLower);
1.181 paf 592: break;
593: default:
594: assert(!"unknown change case kind");
595: break; // never
596: }
597:
598: } else {
599: const unsigned char *tables=source_charset.pcre_tables;
1.82 parser 600:
1.181 paf 601: const unsigned char *a;
602: const unsigned char *b;
603: switch(kind) {
604: case CC_UPPER:
605: a=tables+lcc_offset;
606: b=tables+fcc_offset;
607: break;
608: case CC_LOWER:
609: a=tables+lcc_offset;
610: b=0;
611: break;
612: default:
613: assert(!"unknown change case kind");
614: a=b=0; // calm, compiler
615: break; // never
616: }
617:
1.192 paf 618: char *dest=new_cstr;
1.181 paf 619: unsigned char index;
1.190 paf 620: for(const char* current=new_cstr; (index=(unsigned char)*current); current++) {
1.181 paf 621: unsigned char c=a[index];
622: if(b)
623: c=b[c];
624:
625: *dest++=(char)c;
626: }
1.174 paf 627: }
1.176 paf 628: result.langs=langs;
1.174 paf 629: result.body=new_cstr;
1.89 parser 630:
1.101 parser 631: return result;
632: }
633:
1.174 paf 634: const String& String::replace(const Dictionary& dict) const {
635: String& result=*new String();
636: const char* old_cstr=cstr();
637: const char* prematch_begin=old_cstr;
638:
639: const char* current=old_cstr;
640: while(*current) {
1.184 paf 641: if(Dictionary::Subst subst=dict.first_that_begins(current)) {
1.174 paf 642: // prematch
643: if(size_t prematch_length=current-prematch_begin) {
1.179 paf 644: result.langs.append(result.body, langs, prematch_begin-old_cstr, prematch_length);
1.174 paf 645: result.body.append_strdup_know_length(prematch_begin, prematch_length);
1.101 parser 646: }
647:
1.174 paf 648: // match
649: // skip 'a' in 'current'; move prematch_begin
1.184 paf 650: current+=subst.from_length; prematch_begin=current;
1.174 paf 651:
1.184 paf 652: if(const String* b=subst.to) // are there any b?
1.174 paf 653: result<<*b;
654: } else // simply advance
655: current++;
656: }
1.156 paf 657:
1.174 paf 658: // postmatch
659: if(size_t postmatch_length=current-prematch_begin) {
1.179 paf 660: result.langs.append(result.body, langs, prematch_begin-old_cstr, postmatch_length);
1.174 paf 661: result.body.append_strdup_know_length(prematch_begin, postmatch_length);
662: }
1.156 paf 663:
1.174 paf 664: ASSERT_STRING_INVARIANT(result);
1.82 parser 665: return result;
1.61 paf 666: }
1.113 parser 667:
1.180 paf 668: static int serialize_body_char(char c, char** cur) {
669: *((*cur)++)=c;
670: return 0; // 0=continue
671: };
1.174 paf 672: static int serialize_body_piece(const char* s, char** cur) {
673: size_t length=strlen(s);
674: memcpy(*cur, s, length); *cur+=length;
1.178 paf 675: return 0; // 0=continue
1.174 paf 676: };
1.178 paf 677: static int serialize_lang_piece(char alang, size_t asize, char** cur) {
678: // lang
1.191 paf 679: **cur=alang; (*cur)++;
680: // length [WARNING: not cast, addresses must be %4=0 on sparc]
1.178 paf 681: memcpy(*cur, &asize, sizeof(asize)); *cur+=sizeof(asize);
682:
683: return 0; // 0=continue
684: }
1.174 paf 685: String::Cm String::serialize(size_t prolog_length) const {
1.178 paf 686: size_t fragments_count=langs.count();
1.202 paf 687: size_t body_length=body.length();
1.174 paf 688: size_t buf_length=
1.178 paf 689: prolog_length //1
690: +sizeof(size_t) //2
1.202 paf 691: +body_length //3
692: +1 // 4 for zero terminator used in deserialize
693: +sizeof(size_t) //5
694: +fragments_count*(sizeof(char)+sizeof(size_t)); //6
695:
1.174 paf 696: String::Cm result(new(PointerFreeGC) char[buf_length], buf_length);
697:
698: // 1: prolog
699: char *cur=result.str+prolog_length;
1.202 paf 700: // 2: chars.count [WARNING: not cast, addresses must be %4=0 on sparc]
701: memcpy(cur, &body_length, sizeof(body_length)); cur+=sizeof(body_length);
702: // 3: letters
703: body.for_each(serialize_body_char, serialize_body_piece, &cur);
704: // 4: zero terminator
705: *cur++=0;
706: // 5: langs.count [WARNING: not cast, addresses must be %4=0 on sparc]
1.174 paf 707: memcpy(cur, &fragments_count, sizeof(fragments_count)); cur+=sizeof(fragments_count);
1.202 paf 708: // 6: lang info
1.178 paf 709: langs.for_each(body, serialize_lang_piece, &cur);
1.113 parser 710:
1.174 paf 711: return result;
1.113 parser 712: }
1.202 paf 713: bool String::deserialize(size_t prolog_size, void *buf, size_t buf_size) {
714: size_t in_buf=buf_size;
715: if(in_buf<=prolog_size)
1.148 paf 716: return false;
1.202 paf 717: in_buf-=prolog_size;
1.135 paf 718:
1.174 paf 719: // 1: prolog
1.202 paf 720: const char* cur=(const char* )buf+prolog_size;
1.113 parser 721:
1.207 paf 722: // 2: chars.count
1.202 paf 723: size_t body_length;
724: if(in_buf<sizeof(body_length)) // body.length don't fit?
725: return false;
726: // [WARNING: not cast, addresses must be %4=0 on sparc]
727: memcpy(&body_length, cur, sizeof(body_length)); cur+=sizeof(body_length);
728: in_buf-=sizeof(body_length);
729:
730: if(in_buf<body_length+1) // letters+terminator don't fit?
731: return false;
732: // 4: zero terminator
733: if(cur[body_length] != 0) // in place?
734: return false;
735: // 3: letters
736: body=String::Body(cur, body_length);
737: cur+=body_length+1;
738: in_buf-=body_length+1;
739:
740: // 5: langs.count
1.191 paf 741: size_t fragments_count;
1.202 paf 742: if(in_buf<sizeof(fragments_count)) // langs.count don't fit?
1.174 paf 743: return false;
1.191 paf 744: // [WARNING: not cast, addresses must be %4=0 on sparc]
745: memcpy(&fragments_count, cur, sizeof(fragments_count)); cur+=sizeof(fragments_count);
1.202 paf 746: in_buf-=sizeof(fragments_count);
1.174 paf 747:
748: if(fragments_count) {
1.202 paf 749: // 6: lang info
1.174 paf 750: size_t total_length=0;
751: for(size_t f=0; f<fragments_count; f++) {
1.191 paf 752: char lang;
753: size_t fragment_length;
754: size_t piece_length=sizeof(lang)+sizeof(fragment_length);
1.202 paf 755: if(in_buf<piece_length) // lang+length
1.174 paf 756: return false;
757:
1.191 paf 758: // lang
759: lang=*cur++;
760: // length [WARNING: not cast, addresses must be %4=0 on sparc]
761: memcpy(&fragment_length, cur, sizeof(fragment_length)); cur+=sizeof(fragment_length);
762:
1.206 paf 763: size_t combined_length=total_length+fragment_length;
764: if(combined_length>body_length)
765: return false; // file curruption
1.191 paf 766: // uchar needed to prevent propagating 0x80 bit to upper bytes
767: langs.append(total_length, (String::Language)(uchar)lang, fragment_length);
1.206 paf 768: total_length=combined_length;
1.202 paf 769: in_buf-=piece_length;
1.174 paf 770: }
1.128 paf 771:
1.202 paf 772: if(total_length!=body_length) // length(all language fragments) vs length(letters)
1.148 paf 773: return false;
1.174 paf 774: }
1.202 paf 775: if(in_buf!=0) // some strange extra bytes
776: return false;
1.113 parser 777:
1.174 paf 778: ASSERT_STRING_INVARIANT(*this);
1.148 paf 779: return true;
1.176 paf 780: }
781:
782: const char* String::Body::v() const {
783: return CORD_to_const_char_star(body);
784: }
1.201 paf 785: void String::Body::dump() const {
786: CORD_dump(body);
787: }
788:
1.176 paf 789: const char* String::Languages::v() const {
1.177 paf 790: if(opt.is_not_just_lang)
1.176 paf 791: return CORD_to_const_char_star(langs);
792: else
793: return (const char*)&langs;
794: }
1.201 paf 795: void String::Languages::dump() const {
796: if(opt.is_not_just_lang)
797: CORD_dump(langs);
798: else
799: puts((const char*)&langs);
800: }
1.176 paf 801: const char* String::v() const {
1.198 paf 802: const uint LIMIT_VIEW=20;
1.176 paf 803: char* buf=(char*)malloc(MAX_STRING);
804: const char*body_view=body.v();
805: const char*langs_view=langs.v();
806: snprintf(buf, MAX_STRING,
1.178 paf 807: "%d:%.*s%s} "
1.176 paf 808: "{%d:%s",
1.178 paf 809: langs.count(), LIMIT_VIEW, langs_view, strlen(langs_view)>LIMIT_VIEW?"...":"",
1.176 paf 810: strlen(body_view), body_view
811: );
812:
813: return buf;
1.113 parser 814: }
1.201 paf 815: void String::dump() const {
816: body.dump();
817: langs.dump();
818: }
1.195 paf 819: const String& String::trim(String::Trim_kind kind, const char* chars) const {
820: if(!length())
821: return *this;
822:
823: size_t substr_begin, substr_length;
824: Body new_body=body.trim(kind, chars, &substr_begin, &substr_length);
825: if(new_body==body) // we received unchanged pointer, do likewise
826: return *this;
827: // new_body differs from body, adjust langs along
828:
829: String& result=*new String;
830: if(!new_body) // body.trim produced empty result
831: return result;
832: // body.trim produced nonempty result
833:
834: // first: their langs
835: result.langs.append(result.body, langs, substr_begin, substr_length);
836: // next: letters themselves
837: result.body=new_body;
838:
839: ASSERT_STRING_INVARIANT(result);
840: return result;
1.198 paf 841: }
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