--- parser3/src/main/pa_string.C 2001/07/20 09:40:46 1.95 +++ parser3/src/main/pa_string.C 2001/10/19 12:43:30 1.112 @@ -2,10 +2,10 @@ Parser: string class. @see untasize_t.C. Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) + + $Id: pa_string.C,v 1.112 2001/10/19 12:43:30 parser Exp $ */ -static const char *RCSId="$Id: pa_string.C,v 1.95 2001/07/20 09:40:46 parser Exp $"; #include "pa_config_includes.h" @@ -20,6 +20,7 @@ static const char *RCSId="$Id: pa_string #include "pa_array.h" #include "pa_globals.h" #include "pa_table.h" +#include "pa_dictionary.h" String::String(Pool& apool, const char *src, size_t src_size, bool tainted) : Pooled(apool), @@ -46,6 +47,7 @@ String::String(const String& src) : size_t src_used_rows=src.fused_rows; if(src_used_rows<=head.count) { // all new rows fit size_to preallocated area + last_chunk=&head; size_t curr_chunk_rows=head.count; memcpy(head.rows, src.head.rows, sizeof(Chunk::Row)*src_used_rows); append_here=&head.rows[src_used_rows]; @@ -64,15 +66,15 @@ String::String(const String& src) : memcpy(head.rows, src.head.rows, sizeof(Chunk::Row)*head.count); // remaining rows size_to new_chunk size_t curr_chunk_rows=src_used_rows-head.count; - Chunk *new_chunk=static_cast( + last_chunk=static_cast( malloc(sizeof(size_t)+sizeof(Chunk::Row)*curr_chunk_rows+sizeof(Chunk *))); - new_chunk->count=curr_chunk_rows; - head.preallocated_link=new_chunk; - append_here=link_row=&new_chunk->rows[new_chunk->count]; + last_chunk->count=curr_chunk_rows; + head.preallocated_link=last_chunk; + append_here=link_row=&last_chunk->rows[last_chunk->count]; Chunk *old_chunk=src.head.preallocated_link; - Chunk::Row *new_rows=new_chunk->rows; - size_t rows_left_to_copy=new_chunk->count; + Chunk::Row *new_rows=last_chunk->rows; + size_t rows_left_to_copy=last_chunk->count; while(true) { size_t old_count=old_chunk->count; Chunk *next_chunk=old_chunk->rows[old_count].link; @@ -149,6 +151,15 @@ String& String::real_append(STRING_APPEN return *this; } +char String::first_char() const { + if(!fused_rows) + throw Exception(0, 0, + this, + "getting first char of empty string"); + + return *head.rows[0].item.ptr; +} + uint String::hash_code() const { uint result=0; @@ -329,10 +340,10 @@ int String::cmp(int& partial, const char #ifndef NO_STRING_ORIGIN const Origin& String::origin() const { - if(!fused_rows) - THROW(0, 0, - 0, - "String::origin() of empty string called"); + if(!fused_rows) { + static const Origin empty_origin={"empty string"}; + return empty_origin; + } // determining origin by last appended piece // because first one frequently constant. @@ -346,12 +357,12 @@ const Origin& String::origin() const { #endif String& String::mid(size_t start, size_t finish) const { + String& result=*NEW String(pool()); + start=max(0, start); finish=min(size(), finish); if(start==finish) - return *empty_string; - - String& result=*NEW String(pool()); + return result; size_t pos=0; const Chunk *chunk=&head; @@ -497,7 +508,7 @@ bool String::match(const unsigned char * bool *was_global) const { if(!regexp.size()) - THROW(0, 0, + throw Exception(0, 0, aorigin, "regexp is empty"); const char *pattern=regexp.cstr(UL_AS_IS); @@ -511,14 +522,14 @@ bool String::match(const unsigned char * pcre_tables); if(!code) - THROW(0, 0, + throw Exception(0, 0, ®exp.mid(erroffset, regexp.size()), "regular expression syntax error - %s", errptr); int info_substrings=pcre_info(code, 0, 0); if(info_substrings<0) { - (*pcre_free)(code); - THROW(0, 0, + pcre_free(code); + throw Exception(0, 0, aorigin, "pcre_info error (%d)", info_substrings); @@ -551,14 +562,14 @@ bool String::match(const unsigned char * exec_option_bits, ovector, ovecsize); if(exec_substrings==PCRE_ERROR_NOMATCH) { - (*pcre_free)(code); - (*row_action)(**table, 0/*last time, no row*/, 0, 0, info); + pcre_free(code); + row_action(**table, 0/*last time, no row*/, 0, 0, info); return option_bits[1]!=0; // global=true+table, not global=false } if(exec_substrings<0) { - (*pcre_free)(code); - THROW(0, 0, + pcre_free(code); + throw Exception(0, 0, aorigin, "regular expression execute error (%d)", exec_substrings); @@ -574,13 +585,14 @@ bool String::match(const unsigned char * row+=&mid(ovector[i*2+0], ovector[i*2+1]); // .i column value } - (*row_action)(**table, &row, startoffset, ovector[0], info); + row_action(**table, &row, startoffset, ovector[0], info); - if(!option_bits[1] || !(startoffset=ovector[1])) { // not global | going to hang - (*pcre_free)(code); - (*row_action)(**table, 0/*last time, no row*/, 0, 0, info); + if(!option_bits[1] || startoffset==ovector[1]) { // not global | going to hang + pcre_free(code); + row_action(**table, 0/*last time, no row*/, 0, 0, info); return true; } + startoffset=ovector[1]; /* if(option_bits[0] & PCRE_MULTILINE) @@ -605,7 +617,7 @@ String& String::change_case(Pool& pool, b=0; break; default: - PTHROW(0, 0, + throw Exception(0, 0, this, "unknown change case kind #%d", static_cast(kind)); // never @@ -642,18 +654,167 @@ break2: return result; } +void String::join_chain(Pool& pool, + size_t& ai, const Chunk*& achunk, const Chunk::Row*& arow, + Untaint_lang& joined_lang, const char *& joined_ptr, size_t& joined_size) const { + joined_lang=arow->item.lang; + + // calc size + joined_size=0; + { + size_t start_i=ai; + const Chunk::Row *start_row=arow; + const Chunk *chunk=achunk; + do { + const Chunk::Row *row=start_row; + for(size_t i=start_i; icount; i++, row++) { + if(row==append_here) + goto break21; + + if(row->item.lang==joined_lang) + joined_size+=row->item.size; + else + break; + } + if(chunk=row->link) { + start_i=0; + start_row=chunk->rows; + } else + break; + } while(true); +break21:; + } + + // if one row, return simply itself + if(joined_size==arow->item.size) { + joined_ptr=arow->item.ptr; + ai++; arow++; + if(ai==achunk->count) + achunk=arow->link; + } else { + // join adjacent rows + char *ptr=(char *)pool.malloc(joined_size); + joined_ptr=ptr; + size_t start_i=ai; + const Chunk::Row *start_row=arow; + const Chunk *chunk=achunk; + size_t i; + const Chunk::Row *row; + do { + row=start_row; + for(i=start_i; icount; i++, row++) { + if(row==append_here) + goto break22; + + if(row->item.lang==joined_lang) { + memcpy(ptr, row->item.ptr, row->item.size); + ptr+=row->item.size; + } else + break; + } + if(chunk=row->link) { + start_i=0; + start_row=chunk->rows; + } else + break; + } while(true); +break22:; + + // return joined rows + ai=i; + arow=row; + achunk=chunk; + } +} + +String& String::reconstruct(Pool& pool) const { + //_asm int 3; + String& result=*new(pool) String(pool); + const Chunk *chunk=&head; + do { + const Chunk::Row *row=chunk->rows; + for(size_t i=0; icount; ) { + if(row==append_here) + goto break2; + + Untaint_lang joined_lang; + const char *joined_ptr; + size_t joined_size; + join_chain(pool, i, chunk, row, + joined_lang, joined_ptr, joined_size); + + result.APPEND(joined_ptr, joined_size, + joined_lang, + row->item.origin.file, row->item.origin.line); + if(!chunk) + goto break2; + } + } while(true); +break2: + + return result; +}; + +String& String::replace_in_reconstructed(Pool& pool, Dictionary& dict) const { + //_asm int 3; + String& result=*new(pool) String(pool); + const Chunk *chunk=&head; + do { + const Chunk::Row *row=chunk->rows; + for(size_t i=0; icount; i++, row++) { + if(row==append_here) + goto break2; + + const char *src=row->item.ptr; + size_t src_size=row->item.size; + char *new_cstr=(char *)pool.malloc((size_t)ceil(src_size*dict.max_ratio())); + char *dest=new_cstr; + while(src_size) { + // there is a row where first column starts 'src' + if(Table::Item *item=dict.first_that_starts(src, src_size)) { + // get a=>b values + const String& a=*static_cast(item)->get_string(0); + const String& b=*static_cast(item)->get_string(1); + // skip 'a' in 'src' && reduce work size + src+=a.size(); src_size-=a.size(); + // write 'b' to 'dest' && skip 'b' in 'dest' + b.store_to(dest); dest+=b.size(); + } else { + // write a char to b && reduce work size + *dest++=*src++; src_size--; + } + } + + result.APPEND(new_cstr, dest-new_cstr, + row->item.lang, + row->item.origin.file, row->item.origin.line); + } + chunk=row->link; + } while(chunk); + +break2: + return result; +} + +String& String::replace(Pool& pool, Dictionary& dict) const { + return reconstruct(pool).replace_in_reconstructed(pool, dict); +} + double String::as_double() const { double result; const char *cstr=this->cstr(); - char *error_pos=0; + char *error_pos; // 0xABC - if(cstr[0]=='0' && (cstr[1]=='x' || cstr[1]=='X')) - result=(double)(unsigned long)strtol(cstr, &error_pos, 0); + if(cstr[0]=='0') + if(cstr[1]=='x' || cstr[1]=='X') + result=(double)(unsigned long)strtol(cstr, &error_pos, 0); + else + result=(double)strtod(cstr+1/*skip leading 0*/, &error_pos); else - result=strtod(cstr, &error_pos); + result=(double)strtod(cstr, &error_pos); - if(error_pos && *error_pos) - THROW(0, 0, + if(*error_pos/*not EOS*/) + throw Exception(0, 0, this, "invalid number (double)"); @@ -662,15 +823,18 @@ double String::as_double() const { int String::as_int() const { int result; const char *cstr=this->cstr(); - char *error_pos=0; + char *error_pos; // 0xABC - if(cstr[0]=='0' && (cstr[1]=='x' || cstr[1]=='X')) - result=(int)(unsigned long)strtol(cstr, &error_pos, 0); + if(cstr[0]=='0') + if(cstr[1]=='x' || cstr[1]=='X') + result=(int)(unsigned long)strtol(cstr, &error_pos, 0); + else + result=(int)strtol(cstr+1/*skip leading 0*/, &error_pos, 0); else result=(int)strtol(cstr, &error_pos, 0); - if(error_pos && *error_pos) - THROW(0, 0, + if(*error_pos/*not EOS*/) + throw Exception(0, 0, this, "invalid number (int)");