X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Flyxlex.C;h=da19717fa9a9fd392fd6367affc22b42c9e75abe;hb=7b411194635cb97468046628e6f3bec928ad16af;hp=bb55e8b971382b7b75660fbd7e6e1e261512d496;hpb=8dccec5c46a1689fe3ea37144252e952771e1e1c;p=lyx.git diff --git a/src/lyxlex.C b/src/lyxlex.C index bb55e8b971..da19717fa9 100644 --- a/src/lyxlex.C +++ b/src/lyxlex.C @@ -1,523 +1,249 @@ -// Generalized simple lexical analizer. -// It can be used for simple syntax parsers, like lyxrc, -// texclass and others to come. [asierra30/03/96] -// -// (C) 1996 Lyx Team. +/** + * \file lyxlex.C + * Copyright 1996-2002 the LyX Team + * Read the file COPYING + * + * Generalized simple lexical analyzer. + * It can be used for simple syntax parsers, like lyxrc, + * texclass and others to come. + * + * \author Alejandro Aguilar Sierra + */ #include -#include - -#ifdef __GNUG__ -#pragma implementation "lyxlex.h" -#endif - #include "lyxlex.h" +#include "lyxlex_pimpl.h" #include "debug.h" #include "support/filetools.h" +#include "support/lstrings.h" + +using std::ostream; +using std::istream; +using std::endl; + LyXLex::LyXLex(keyword_item * tab, int num) - : is(&fb__), table(tab), no_items(num) + : pimpl_(new Pimpl(tab, num)) +{} + + +LyXLex::~LyXLex() +{ + delete pimpl_; +} + + +bool LyXLex::isOK() const +{ + return pimpl_->is.good(); +} + + +void LyXLex::setLineNo(int l) +{ + pimpl_->lineno = l; +} + + +int LyXLex::getLineNo() const +{ + return pimpl_->lineno; +} + + +string const LyXLex::text() const +{ + return pimpl_->getString(); +} + + +istream & LyXLex::getStream() { - - status = 0; - pushed = 0; + return pimpl_->is; } void LyXLex::pushTable(keyword_item * tab, int num) { - pushed_table * tmppu = new pushed_table; - tmppu->next = pushed; - tmppu->table_elem = table; - tmppu->table_siz = no_items; - pushed = tmppu; - table = tab; - no_items = num; + pimpl_->pushTable(tab, num); } void LyXLex::popTable() { - if (pushed == 0) - lyxerr << "LyXLex error: nothing to pop!" << endl; - - pushed_table * tmp; - tmp = pushed; - table = tmp->table_elem; - no_items = tmp->table_siz; - tmp->table_elem = 0; - pushed = tmp->next; - delete tmp; + pimpl_->popTable(); } -void LyXLex::printTable() +void LyXLex::printTable(ostream & os) { - lyxerr << "\nNumber of tags: " << no_items << endl; - for(int i= 0; i < no_items; ++i) - lyxerr << "table[" << i - << "]: tag: `" << table[i].tag - << "' code:" << table[i].code << endl; - lyxerr << endl; + pimpl_->printTable(os); } void LyXLex::printError(string const & message) const { - string tmpmsg = subst(message, "$$Token", GetString()); - lyxerr << "LyX: " << tmpmsg << " [around line " << lineno - << " of file " << MakeDisplayPath(name) << ']' << endl; + pimpl_->printError(message); } bool LyXLex::setFile(string const & filename) { - if (fb__.is_open()) - lyxerr << "Error in LyXLex::setFile: " - "file or stream already set." << endl; - fb__.open(filename.c_str(), ios::in); - is.rdbuf(&fb__); - name = filename; - lineno = 0; - return fb__.is_open() && is.good(); + return pimpl_->setFile(filename); } void LyXLex::setStream(istream & i) { - if (fb__.is_open() || is.rdbuf()->in_avail()) - lyxerr << "Error in LyXLex::setStream: " - "file or stream already set." << endl; - is.rdbuf(i.rdbuf()); - lineno = 0; + pimpl_->setStream(i); } +void LyXLex::setCommentChar(char c) +{ + pimpl_->setCommentChar(c); +} + int LyXLex::lex() { - //NOTE: possible bug. - if (next() && status == LEX_TOKEN) - return search_kw(buff); - else - return status; + return pimpl_->lex(); } -int LyXLex::GetInteger() const +int LyXLex::getInteger() const { - if (buff[0] > ' ') - return atoi(buff); - else { - printError("Bad integer `$$Token'"); - return -1; - } + if (isStrInt(pimpl_->getString())) + return strToInt(pimpl_->getString()); + pimpl_->printError("Bad integer `$$Token'"); + return -1; } -float LyXLex::GetFloat() const +float LyXLex::getFloat() const { - if (buff[0] > ' ') - return atof(buff); - else { - printError("Bad float `$$Token'"); + // replace comma with dot in case the file was written with + // the wrong locale (should be rare, but is easy enough to + // avoid). + string str = subst(pimpl_->getString(), ",", "."); + if (isStrDbl(str)) + return strToDbl(str); + pimpl_->printError("Bad float `$$Token'"); return -1; - } } -string LyXLex::GetString() const +string const LyXLex::getString() const { - return string(buff); + return pimpl_->getString(); } // I would prefer to give a tag number instead of an explicit token -// here, but it is not possible because Buffer::readLyXformat2 uses -// explicit tokens (JMarc) -string LyXLex::getLongString(string const & endtoken) +// here, but it is not possible because Buffer::readBody uses +// explicit tokens (JMarc) +string const LyXLex::getLongString(string const & endtoken) { string str, prefix; bool firstline = true; - while (IsOK()) { - if (!EatLine()) + while (isOK()) { + if (!eatLine()) // blank line in the file being read continue; - - string const token = frontStrip(strip(GetString()), " \t"); - + + string const token = trim(getString(), " \t"); + lyxerr[Debug::PARSER] << "LongString: `" - << GetString() << '\'' << endl; + << getString() << '\'' << endl; // We do a case independent comparison, like search_kw // does. - if (compare_no_case(token, endtoken) != 0) { - string tmpstr = GetString(); - if (firstline) { - unsigned int i = 0; - while(i < tmpstr.length() - && tmpstr[i] == ' ') { - ++i; - prefix += ' '; - } - firstline = false; - lyxerr[Debug::PARSER] << "Prefix = `" << prefix - << '\'' << endl; - } - - if (!prefix.empty() - && prefixIs(tmpstr, prefix.c_str())) { - tmpstr.erase(0, prefix.length() - 1); - } - str += tmpstr + '\n'; - } - else // token == endtoken + if (compare_ascii_no_case(token, endtoken) == 0) break; + + string tmpstr = getString(); + if (firstline) { + string::size_type i(tmpstr.find_first_not_of(' ')); + if (i != string::npos) + prefix = tmpstr.substr(0, i); + firstline = false; + lyxerr[Debug::PARSER] + << "Prefix = `" << prefix << "\'" << endl; + } + + // further lines in long strings may have the same + // whitespace prefix as the first line. Remove it. + if (prefix.length() && prefixIs(tmpstr, prefix)) { + tmpstr.erase(0, prefix.length() - 1); + } + + str += ltrim(tmpstr, "\t") + '\n'; } - if (!IsOK()) + + if (!isOK()) { printError("Long string not ended by `" + endtoken + '\''); + } return str; } -bool LyXLex::GetBool() const +bool LyXLex::getBool() const { - if (compare(buff, "true") == 0) + if (pimpl_->getString() == "true") { return true; - else if (compare(buff, "false") != 0) - printError("Bad boolean `$$Token'. Use \"false\" or \"true\""); + } else if (pimpl_->getString() != "false") { + pimpl_->printError("Bad boolean `$$Token'. Use \"false\" or \"true\""); + } return false; } -bool LyXLex::EatLine() +bool LyXLex::eatLine() { - int i = 0; - unsigned char c = '\0'; - - while(is && c != '\n' && i != (LEX_MAX_BUFF - 1)) { - is.get(c); - if (c != '\r') - buff[i++] = c; - } - if (i == (LEX_MAX_BUFF - 1) && c != '\n') { - printError("Line too long"); - c = '\n'; // Pretend we had an end of line - --lineno; // but don't increase line counter (netto effect) - ++i; // and preserve last character read. - } - if (c == '\n') { - ++lineno; - buff[--i] = '\0'; // i can never be 0 here, so no danger - status = LEX_DATA; - return true; - } else { - buff[i] = '\0'; - return false; - } + return pimpl_->eatLine(); } -int LyXLex::search_kw(char const * const tag) const +bool LyXLex::next(bool esc) { - int m, k = 0 , l = 0, r = no_items; - - while (l < r) { - m = (l + r) / 2; + return pimpl_->next(esc); +} - if (lyxerr.debugging(Debug::PARSER)) { - lyxerr << "LyXLex::search_kw: elem " << m - << " tag " << table[m].tag - << " search tag " << tag - << endl; - } - if (table[m].tag) - k = compare_no_case(table[m].tag, tag); - if (k == 0) - return table[m].code; - else - if (k < 0) l = m + 1; else r = m; - } - return LEX_UNDEF; +bool LyXLex::nextToken() +{ + return pimpl_->nextToken(); } -bool LyXLex::next(bool esc) +void LyXLex::pushToken(string const & pt) { - if (!esc) { - unsigned char c; // getc() returns an int - - status = 0; - while (is && !status) { - is.get(c); - if (c == '#') { - // Read rest of line (fast :-) - is.get(buff, sizeof(buff)); - lyxerr[Debug::LYXLEX] << "Comment read: " << c << buff << endl; - ++lineno; - continue; - } - - if (c == '\"') { - int i = -1; - do { - is.get(c); - if (c != '\r') - buff[++i] = c; - } while (c != '\"' && c != '\n' && is && - i != (LEX_MAX_BUFF - 2)); - - if (i == (LEX_MAX_BUFF - 2)) { - printError("Line too long"); - c = '\"'; // Pretend we got a " - ++i; - } - - if (c != '\"') { - printError("Missing quote"); - if (c == '\n') - ++lineno; - } - - buff[i] = '\0'; - status = LEX_DATA; - break; - } - - if (c == ',') - continue; /* Skip ','s */ - - // using relational operators with chars other - // than == and != is not safe. And if it is done - // the type _have_ to be unsigned. It usually a - // lot better to use the functions from cctype - if (c > ' ' && is) { -#warning Verify this! (Lgb) - //if (isalnum(static_cast(c)) && is) { - int i = 0; - do { - buff[i++] = c; - is.get(c); - } while (c > ' ' && c != ',' && is - //} while (isalnum(static_cast(c)) - //&& c != ',' && is - && (i != LEX_MAX_BUFF - 1) ); - if (i == LEX_MAX_BUFF - 1) { - printError("Line too long"); - } - buff[i] = '\0'; - status = LEX_TOKEN; - } - - if (c == '\r' && is) { - // The Windows support has lead to the - // possibility of "\r\n" at the end of - // a line. This will stop LyX choking - // when it expected to find a '\n' - is.get(c); - } - - if (c == '\n') - ++lineno; - - } - if (status) return true; - - status = is.eof() ? LEX_FEOF: LEX_UNDEF; - buff[0] = '\0'; - return false; - } else { - unsigned char c; // getc() returns an int - - status = 0; - while (is && !status) { - is.get(c); - - // skip ','s - if (c == ',') continue; - - if (c == '\\') { - // escape - int i = 0; - do { - if (c == '\\') { - // escape the next char - is.get(c); - } - buff[i++] = c; - is.get(c); - } while (c > ' ' && c != ',' && is - //} while (isalnum(static_cast(c)) - //&& c != ',' && is - && (i != LEX_MAX_BUFF - 1) ); - if (i == LEX_MAX_BUFF - 1) { - printError("Line too long"); - } - buff[i] = '\0'; - status = LEX_TOKEN; - continue; - } - - if (c == '#') { - // Read rest of line (fast :-) - is.get(buff, sizeof(buff)); - lyxerr[Debug::LYXLEX] << "Comment read: " << c << buff << endl; - ++lineno; - continue; - } - - // string - if (c == '\"') { - int i = -1; - bool escaped = false; - do { - escaped = false; - is.get(c); - if (c == '\r') continue; - if (c == '\\') { - // escape the next char - is.get(c); - escaped = true; - } - buff[++i] = c; - - if (!escaped && c == '\"') break; - } while (c != '\n' && is && - i != (LEX_MAX_BUFF - 2)); - - if (i == (LEX_MAX_BUFF - 2)) { - printError("Line too long"); - c = '\"'; // Pretend we got a " - ++i; - } - - if (c != '\"') { - printError("Missing quote"); - if (c == '\n') - ++lineno; - } - - buff[i] = '\0'; - status = LEX_DATA; - break; - } - - if (c > ' ' && is) { - //if (isalnum(static_cast(c)) && is) { - int i = 0; - do { - if (c == '\\') { - // escape the next char - is.get(c); - //escaped = true; - } - buff[i++] = c; - is.get(c); - } while (c > ' ' && c != ',' && is - //} while (isalnum(static_cast(c)) - //!= ',' && is - && (i != LEX_MAX_BUFF-1) ); - if (i == LEX_MAX_BUFF-1) { - printError("Line too long"); - } - buff[i] = '\0'; - status = LEX_TOKEN; - } - // new line - if (c == '\n') - ++lineno; - } - - if (status) return true; - - status = is.eof() ? LEX_FEOF: LEX_UNDEF; - buff[0] = '\0'; - return false; - } + pimpl_->pushToken(pt); } -bool LyXLex::nextToken() +int LyXLex::findToken(char const * str[]) { - status = 0; - while (is && !status) { - unsigned char c; - is.get(c); - - if (c >= ' ' && is) { - //if (isprint(static_cast(c)) && is) { - int i = 0; - if (c == '\\') { // first char == '\\' - do { - buff[i++] = c; - is.get(c); - } while (c > ' ' && c != '\\' && is - //} while (isalnum(static_cast(c)) - // && c != '\\' && is - && i != (LEX_MAX_BUFF-1)); - } else { - do { - buff[i++] = c; - is.get(c); - } while (c >= ' ' && c != '\\' && is - //} while (isprint(static_cast(c)) - // && c != '\\' && is - && i != (LEX_MAX_BUFF-1)); - } - - if (i == (LEX_MAX_BUFF - 1)) { - printError("Line too long"); - } - - if (c == '\\') is.putback(c); // put it back - buff[i] = '\0'; - status = LEX_TOKEN; - } - - if (c == '\n') - ++lineno; - + if (!next()) { + pimpl_->printError("file ended while scanning string token"); + return -1; } - if (status) return true; - - status = is.eof() ? LEX_FEOF: LEX_UNDEF; - buff[0] = '\0'; - return false; -} + int i = 0; -int LyXLex::FindToken(char const * str[]) -{ - int i = -1; - - if (next()) { - if (compare(buff, "default")) { - for (i = 0; str[i][0] && compare(str[i], buff); ++i); - if (!str[i][0]) { - printError("Unknown argument `$$Token'"); - i = -1; - } - } - } else - printError("file ended while scanning string token"); - return i; -} + string const search_token = pimpl_->getString(); + if (search_token != "default") { + while (str[i][0] && str[i] != search_token) { + ++i; + } + if (!str[i][0]) { + pimpl_->printError("Unknown argument `$$Token'"); + i = -1; + } + } -int LyXLex::CheckToken(char const * str[], int print_error) -{ - int i = -1; - - if (compare(buff, "default")) { - for (i = 0; str[i][0] && compare(str[i], buff); ++i); - if (!str[i][0]) { - if (print_error) - printError("Unknown argument `$$Token'"); - i = -1; - } - } - return i; + return i; }