1999-09-27 18:44:28 +00:00
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// Generalized simple lexical analizer.
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// It can be used for simple syntax parsers, like lyxrc,
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// texclass and others to come. [asierra30/03/96]
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//
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// (C) 1996 Lyx Team.
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#include <config.h>
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1999-10-02 16:21:10 +00:00
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#include <cstdlib>
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1999-09-27 18:44:28 +00:00
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#ifdef __GNUG__
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#pragma implementation "lyxlex.h"
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#endif
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#include "lyxlex.h"
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1999-10-07 18:44:17 +00:00
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#include "debug.h"
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1999-10-02 16:21:10 +00:00
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#include "support/filetools.h"
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1999-09-27 18:44:28 +00:00
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1999-10-02 16:21:10 +00:00
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LyXLex::LyXLex(keyword_item * tab, int num)
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1999-09-27 18:44:28 +00:00
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: table(tab), no_items(num)
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{
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1999-10-02 16:21:10 +00:00
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file = 0;
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1999-09-27 18:44:28 +00:00
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owns_file = false;
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status = 0;
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1999-10-02 16:21:10 +00:00
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pushed = 0;
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1999-09-27 18:44:28 +00:00
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}
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1999-10-02 16:21:10 +00:00
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void LyXLex::pushTable(keyword_item * tab, int num)
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1999-09-27 18:44:28 +00:00
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{
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1999-10-02 16:21:10 +00:00
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pushed_table * tmppu = new pushed_table;
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1999-09-27 18:44:28 +00:00
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tmppu->next = pushed;
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tmppu->table_elem = table;
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tmppu->table_siz = no_items;
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pushed = tmppu;
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table = tab;
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no_items = num;
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}
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void LyXLex::popTable()
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{
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1999-10-02 16:21:10 +00:00
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if (pushed == 0)
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1999-10-07 18:44:17 +00:00
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lyxerr << "LyXLex error: nothing to pop!" << endl;
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1999-09-27 18:44:28 +00:00
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1999-10-02 16:21:10 +00:00
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pushed_table * tmp;
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1999-09-27 18:44:28 +00:00
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tmp = pushed;
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table = tmp->table_elem;
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no_items = tmp->table_siz;
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1999-10-02 16:21:10 +00:00
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tmp->table_elem = 0;
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1999-09-27 18:44:28 +00:00
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pushed = tmp->next;
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delete tmp;
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}
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void LyXLex::printTable()
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{
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1999-10-07 18:44:17 +00:00
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lyxerr << "\nNumber of tags: " << no_items << endl;
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1999-09-27 18:44:28 +00:00
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for(int i=0; i<no_items; i++)
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1999-10-07 18:44:17 +00:00
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lyxerr << "table[" << i
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<< "]: tag: `" << table[i].tag
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<< "' code:" << table[i].code << endl;
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lyxerr << endl;
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1999-09-27 18:44:28 +00:00
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}
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1999-10-02 16:21:10 +00:00
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void LyXLex::printError(string const & message)
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1999-09-27 18:44:28 +00:00
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{
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1999-10-02 16:21:10 +00:00
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string tmpmsg = subst(message, "$$Token", GetString());
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1999-10-07 18:44:17 +00:00
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lyxerr << "LyX: " << tmpmsg << " [around line " << lineno
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<< " of file " << MakeDisplayPath(name) << ']' << endl;
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1999-09-27 18:44:28 +00:00
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}
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1999-10-02 16:21:10 +00:00
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bool LyXLex::setFile(string const & filename)
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1999-09-27 18:44:28 +00:00
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{
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if (file)
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1999-10-07 18:44:17 +00:00
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lyxerr << "Error in LyXLex::setFile: file already set." <<endl;
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1999-09-27 18:44:28 +00:00
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file = fopen(filename.c_str(), "r");
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name = filename;
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owns_file = true;
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lineno = 0;
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return (file ? true : false);
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}
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1999-10-02 16:21:10 +00:00
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void LyXLex::setFile(FILE * f)
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1999-09-27 18:44:28 +00:00
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{
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if (file)
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1999-10-07 18:44:17 +00:00
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lyxerr << "Error in LyXLex::setFile: file already set." << endl;
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1999-09-27 18:44:28 +00:00
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file = f;
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owns_file = false;
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lineno = 0; // this is bogus if the file already has been read from
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}
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int LyXLex::lex()
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{
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//NOTE: possible bug.
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if (next() && status==LEX_TOKEN)
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return search_kw(buff);
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else
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return status;
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}
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int LyXLex::GetInteger()
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{
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if (buff[0]>' ')
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return atoi(buff);
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else {
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printError("Bad integer `$$Token'");
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return -1;
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}
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}
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float LyXLex::GetFloat()
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{
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if (buff[0]>' ')
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1999-10-02 16:21:10 +00:00
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return (float)strtod(buff, (char**)0);
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1999-09-27 18:44:28 +00:00
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else {
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printError("Bad float `$$Token'");
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return -1;
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}
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}
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1999-10-02 16:21:10 +00:00
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string LyXLex::GetString() const
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1999-09-27 18:44:28 +00:00
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{
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1999-10-02 16:21:10 +00:00
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return string(buff);
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1999-09-27 18:44:28 +00:00
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}
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// I would prefer to give a tag number instead of an explicit token
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// here, but it is not possible because Buffer::readLyXformat2 uses
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// explicit tokens (JMarc)
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1999-10-02 16:21:10 +00:00
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string LyXLex::getLongString(string const & endtoken)
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1999-09-27 18:44:28 +00:00
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{
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1999-10-02 16:21:10 +00:00
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string str, prefix;
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1999-09-27 18:44:28 +00:00
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bool firstline = true;
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while (IsOK()) {
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if (!EatLine())
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// blank line in the file being read
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continue;
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1999-10-02 16:21:10 +00:00
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string const token = frontStrip(strip(GetString()), " \t");
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1999-09-27 18:44:28 +00:00
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1999-10-07 18:44:17 +00:00
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lyxerr[Debug::PARSER] << "LongString: `"
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<< GetString() << '\'' << endl;
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1999-09-27 18:44:28 +00:00
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// We do a case independent comparison, like search_kw
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// does.
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1999-10-02 16:21:10 +00:00
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if (compare_no_case(token, endtoken) != 0) {
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string tmpstr = GetString();
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1999-09-27 18:44:28 +00:00
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if (firstline) {
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1999-10-02 16:21:10 +00:00
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unsigned int i = 0;
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1999-09-27 18:44:28 +00:00
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while(i < tmpstr.length()
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&& tmpstr[i] == ' ') {
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1999-10-02 16:21:10 +00:00
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++i;
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1999-09-27 18:44:28 +00:00
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prefix += ' ';
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}
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firstline = false;
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1999-10-07 18:44:17 +00:00
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lyxerr[Debug::PARSER] << "Prefix = `" << prefix
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<< '\'' << endl;
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1999-09-27 18:44:28 +00:00
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}
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if (!prefix.empty()
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1999-10-02 16:21:10 +00:00
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&& prefixIs(tmpstr, prefix.c_str())) {
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tmpstr.erase(0, prefix.length() - 1);
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1999-09-27 18:44:28 +00:00
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}
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str += tmpstr + '\n';
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}
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else // token == endtoken
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break;
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}
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if (!IsOK())
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printError("Long string not ended by `" + endtoken + '\'');
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return str;
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}
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bool LyXLex::GetBool()
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{
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1999-10-02 16:21:10 +00:00
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if (compare(buff, "true") == 0)
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1999-09-27 18:44:28 +00:00
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return true;
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1999-10-02 16:21:10 +00:00
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else if (compare(buff, "false") != 0)
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1999-09-27 18:44:28 +00:00
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printError("Bad boolean `$$Token'. Use \"false\" or \"true\"");
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return false;
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}
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bool LyXLex::EatLine()
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{
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int i=0;
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int c = '\0'; // getc() returns an int
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while (!feof(file) && c!='\n' && i!=(LEX_MAX_BUFF-1)) {
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c = getc(file);
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if (c != '\r')
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buff[i++] = c;
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}
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if (i==(LEX_MAX_BUFF-1) && c !='\n') {
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printError("Line too long");
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c = '\n'; // Pretend we had an end of line
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1999-10-02 16:21:10 +00:00
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--lineno; // but don't increase line counter (netto effect)
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++i; // and preserve last character read.
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1999-09-27 18:44:28 +00:00
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}
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if (c=='\n') {
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1999-10-02 16:21:10 +00:00
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++lineno;
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1999-09-27 18:44:28 +00:00
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buff[--i] = '\0'; // i can never be 0 here, so no danger
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status = LEX_DATA;
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return true;
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} else {
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buff[i] = '\0';
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return false;
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}
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}
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int LyXLex::search_kw(char const * const tag) const
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{
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int m, k=0 , l= 0, r=no_items;
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while (l < r) {
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m = (l+r)/2;
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1999-10-07 18:44:17 +00:00
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if (lyxerr.debugging(Debug::PARSER)) {
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lyxerr << "LyXLex::search_kw: elem " << m
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<< " tag " << table[m].tag
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<< " search tag " << tag
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<< endl;
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1999-09-27 18:44:28 +00:00
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}
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if (table[m].tag)
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1999-10-02 16:21:10 +00:00
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k = compare_no_case(table[m].tag, tag);
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1999-09-27 18:44:28 +00:00
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if (k==0)
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return table[m].code;
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else
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if (k<0) l = m+1; else r = m;
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}
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return -1;
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}
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bool LyXLex::next(bool esc)
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{
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if (!esc) {
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int c; // getc() returns an int
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1999-10-07 18:44:17 +00:00
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//int i;
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1999-09-27 18:44:28 +00:00
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status = 0;
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while (!feof(file) && !status) {
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c = getc(file);
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if (c=='#') {
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// Read rest of line (fast :-)
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fgets(buff, sizeof(buff), file);
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1999-10-02 16:21:10 +00:00
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++lineno;
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1999-09-27 18:44:28 +00:00
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continue;
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}
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if (c=='\"') {
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1999-10-07 18:44:17 +00:00
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int i = -1;
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1999-09-27 18:44:28 +00:00
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do {
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c = getc(file);
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if (c != '\r')
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buff[++i] = c;
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} while (c!='\"' && c!='\n' && !feof(file) &&
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i!=(LEX_MAX_BUFF-2));
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if (i==(LEX_MAX_BUFF-2)) {
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printError("Line too long");
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c = '\"'; // Pretend we got a "
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1999-10-02 16:21:10 +00:00
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++i;
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1999-09-27 18:44:28 +00:00
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}
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if (c!='\"') {
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printError("Missing quote");
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if (c=='\n')
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1999-10-02 16:21:10 +00:00
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++lineno;
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1999-09-27 18:44:28 +00:00
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}
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buff[i] = '\0';
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status = LEX_DATA;
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break;
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}
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if (c==',')
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continue; /* Skip ','s */
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if (c > ' ' && !feof(file)) {
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1999-10-07 18:44:17 +00:00
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int i = 0;
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1999-09-27 18:44:28 +00:00
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do {
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buff[i++] = c;
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c = getc(file);
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} while (c > ' ' && c != ',' && !feof(file) &&
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(i != LEX_MAX_BUFF-1) );
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if (i == LEX_MAX_BUFF-1) {
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printError("Line too long");
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}
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buff[i] = '\0';
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status = LEX_TOKEN;
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}
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1999-10-02 16:21:10 +00:00
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if (c== '\r' && !feof(file)) {
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1999-09-27 18:44:28 +00:00
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// The Windows support has lead to the
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// possibility of "\r\n" at the end of
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// a line. This will stop LyX choking
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// when it expected to find a '\n'
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c = getc(file);
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}
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if (c=='\n')
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1999-10-02 16:21:10 +00:00
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++lineno;
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1999-09-27 18:44:28 +00:00
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}
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if (status) return true;
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status = (feof(file)) ? LEX_FEOF: LEX_UNDEF;
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buff[0] = '\0';
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return false;
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} else {
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int c; // getc() returns an int
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1999-10-07 18:44:17 +00:00
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//int i;
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1999-09-27 18:44:28 +00:00
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status = 0;
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while (!feof(file) && !status) {
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c = getc(file);
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// skip ','s
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if (c==',') continue;
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if (c=='\\') {
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// escape
|
1999-10-07 18:44:17 +00:00
|
|
|
int i = 0;
|
1999-09-27 18:44:28 +00:00
|
|
|
do {
|
|
|
|
if (c == '\\') {
|
|
|
|
// escape the next char
|
|
|
|
c = getc(file);
|
|
|
|
}
|
|
|
|
buff[i++] = c;
|
|
|
|
c = getc(file);
|
|
|
|
} while (c > ' ' && c != ',' && !feof(file) &&
|
|
|
|
(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 :-)
|
|
|
|
fgets(buff, sizeof(buff), file);
|
1999-10-02 16:21:10 +00:00
|
|
|
++lineno;
|
1999-09-27 18:44:28 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
// string
|
|
|
|
if (c=='\"') {
|
1999-10-07 18:44:17 +00:00
|
|
|
int i = -1;
|
1999-09-27 18:44:28 +00:00
|
|
|
bool escaped = false;
|
|
|
|
do {
|
|
|
|
escaped = false;
|
|
|
|
c = getc(file);
|
|
|
|
if (c == '\r') continue;
|
|
|
|
if (c == '\\') {
|
|
|
|
// escape the next char
|
|
|
|
c = getc(file);
|
|
|
|
escaped = true;
|
|
|
|
}
|
|
|
|
buff[++i] = c;
|
|
|
|
|
|
|
|
if (!escaped && c == '\"') break;
|
|
|
|
} while (c!='\n' && !feof(file) &&
|
|
|
|
i!=(LEX_MAX_BUFF-2));
|
|
|
|
|
|
|
|
if (i==(LEX_MAX_BUFF-2)) {
|
|
|
|
printError("Line too long");
|
|
|
|
c = '\"'; // Pretend we got a "
|
1999-10-02 16:21:10 +00:00
|
|
|
++i;
|
1999-09-27 18:44:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (c!='\"') {
|
|
|
|
printError("Missing quote");
|
|
|
|
if (c=='\n')
|
1999-10-02 16:21:10 +00:00
|
|
|
++lineno;
|
1999-09-27 18:44:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
buff[i] = '\0';
|
|
|
|
status = LEX_DATA;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (c > ' ' && !feof(file)) {
|
1999-10-07 18:44:17 +00:00
|
|
|
int i = 0;
|
1999-09-27 18:44:28 +00:00
|
|
|
do {
|
|
|
|
if (c == '\\') {
|
|
|
|
// escape the next char
|
|
|
|
c = getc(file);
|
|
|
|
//escaped = true;
|
|
|
|
}
|
|
|
|
buff[i++] = c;
|
|
|
|
c = getc(file);
|
|
|
|
} while (c > ' ' && c != ',' && !feof(file) &&
|
|
|
|
(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')
|
1999-10-02 16:21:10 +00:00
|
|
|
++lineno;
|
1999-09-27 18:44:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (status) return true;
|
|
|
|
|
|
|
|
status = (feof(file)) ? LEX_FEOF: LEX_UNDEF;
|
|
|
|
buff[0] = '\0';
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
bool LyXLex::nextToken()
|
|
|
|
{
|
|
|
|
int c; // getc() returns an int
|
|
|
|
int i;
|
|
|
|
|
|
|
|
status = 0;
|
|
|
|
while (!feof(file) && !status) {
|
|
|
|
c = getc(file);
|
|
|
|
|
|
|
|
if (c >= ' ' && !feof(file)) {
|
|
|
|
i = 0;
|
|
|
|
if (c == '\\') { // first char == '\\'
|
|
|
|
do {
|
|
|
|
buff[i++] = c;
|
|
|
|
c = getc(file);
|
|
|
|
} while (c > ' ' && c != '\\' && !feof(file) &&
|
|
|
|
i != (LEX_MAX_BUFF-1));
|
|
|
|
} else {
|
|
|
|
do {
|
|
|
|
buff[i++] = c;
|
|
|
|
c = getc(file);
|
|
|
|
} while (c >= ' ' && c != '\\' && !feof(file)
|
|
|
|
&& i != (LEX_MAX_BUFF-1));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i == (LEX_MAX_BUFF-1)) {
|
|
|
|
printError("Line too long");
|
|
|
|
}
|
|
|
|
|
|
|
|
if (c == '\\') ungetc(c,file); // put it back
|
|
|
|
buff[i] = '\0';
|
|
|
|
status = LEX_TOKEN;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (c=='\n')
|
1999-10-02 16:21:10 +00:00
|
|
|
++lineno;
|
1999-09-27 18:44:28 +00:00
|
|
|
|
|
|
|
}
|
|
|
|
if (status) return true;
|
|
|
|
|
|
|
|
status = (feof(file)) ? LEX_FEOF: LEX_UNDEF;
|
|
|
|
buff[0] = '\0';
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
1999-10-02 16:21:10 +00:00
|
|
|
int LyXLex::FindToken(char const * str[])
|
1999-09-27 18:44:28 +00:00
|
|
|
{
|
|
|
|
int i = -1;
|
|
|
|
|
|
|
|
if (next()) {
|
1999-10-02 16:21:10 +00:00
|
|
|
if (compare(buff, "default")) {
|
|
|
|
for (i = 0; str[i][0] && compare(str[i], buff); ++i);
|
|
|
|
if (!str[i][0]) {
|
1999-09-27 18:44:28 +00:00
|
|
|
printError("Unknown argument `$$Token'");
|
|
|
|
i = -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
printError("file ended while scanning string token");
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
1999-10-02 16:21:10 +00:00
|
|
|
int LyXLex::CheckToken(char const * str[], int print_error)
|
1999-09-27 18:44:28 +00:00
|
|
|
{
|
|
|
|
int i = -1;
|
|
|
|
|
1999-10-02 16:21:10 +00:00
|
|
|
if (compare(buff, "default")) {
|
|
|
|
for (i = 0; str[i][0] && compare(str[i], buff); i++);
|
|
|
|
if (!str[i][0]) {
|
1999-09-27 18:44:28 +00:00
|
|
|
if (print_error)
|
|
|
|
printError("Unknown argument `$$Token'");
|
|
|
|
i = -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return i;
|
|
|
|
}
|