440 lines
11 KiB
Plaintext
440 lines
11 KiB
Plaintext
%{
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/*=========================================================================
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Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
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Language: C++
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Date: $Date$
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Version: $Revision$
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Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
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See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
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/*
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This file must be translated to C and modified to build everywhere.
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Run flex like this:
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flex --prefix=cmListFileLexer_yy -ocmListFileLexer.c cmListFileLexer.in.l
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Modify cmListFileLexer.c:
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- remove TABs
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- remove the yyunput function
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- add a statement "(void)yyscanner;" to the top of these methods:
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yy_fatal_error, yyalloc, yyrealloc, yyfree
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- remove all YY_BREAK lines occurring right after return statements
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*/
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/* Disable features we do not need. */
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#define YY_NEVER_INTERACTIVE 1
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#define YY_NO_INPUT 1
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#define YY_NO_UNPUT 1
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#define YY_NO_UNISTD_H 1
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#define ECHO
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/* Setup the proper yylex declaration. */
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#define YY_EXTRA_TYPE cmListFileLexer*
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#define YY_DECL int cmListFileLexer_yylex (yyscan_t yyscanner, cmListFileLexer* lexer)
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/* Disable some warnings. */
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#if defined(_MSC_VER)
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# pragma warning ( disable : 4127 )
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# pragma warning ( disable : 4131 )
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# pragma warning ( disable : 4244 )
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# pragma warning ( disable : 4251 )
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# pragma warning ( disable : 4267 )
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# pragma warning ( disable : 4305 )
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# pragma warning ( disable : 4309 )
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# pragma warning ( disable : 4706 )
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# pragma warning ( disable : 4786 )
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#endif
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#include "cmListFileLexer.h"
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/*--------------------------------------------------------------------------*/
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struct cmListFileLexer_s
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{
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cmListFileLexer_Token token;
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int line;
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int column;
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int size;
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FILE* file;
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char* string_buffer;
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char* string_position;
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int string_left;
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yyscan_t scanner;
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};
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static void cmListFileLexerSetToken(cmListFileLexer* lexer, const char* text,
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int length);
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static void cmListFileLexerAppend(cmListFileLexer* lexer, const char* text,
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int length);
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static int cmListFileLexerInput(cmListFileLexer* lexer, char* buffer,
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size_t bufferSize);
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static void cmListFileLexerInit(cmListFileLexer* lexer);
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static void cmListFileLexerDestroy(cmListFileLexer* lexer);
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/* Replace the lexer input function. */
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#undef YY_INPUT
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#define YY_INPUT(buf, result, max_size) \
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{ result = cmListFileLexerInput(cmListFileLexer_yyget_extra(yyscanner), buf, max_size); }
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/*--------------------------------------------------------------------------*/
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%}
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%option reentrant
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%option yylineno
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%option noyywrap
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%pointer
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%x STRING
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MAKEVAR \$\([A-Za-z0-9_]*\)
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%%
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\n {
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lexer->token.type = cmListFileLexer_Token_Newline;
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cmListFileLexerSetToken(lexer, yytext, yyleng);
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++lexer->line;
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lexer->column = 1;
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return 1;
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}
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#.* {
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lexer->column += yyleng;
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}
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\( {
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lexer->token.type = cmListFileLexer_Token_ParenLeft;
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cmListFileLexerSetToken(lexer, yytext, yyleng);
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lexer->column += yyleng;
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return 1;
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}
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\) {
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lexer->token.type = cmListFileLexer_Token_ParenRight;
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cmListFileLexerSetToken(lexer, yytext, yyleng);
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lexer->column += yyleng;
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return 1;
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}
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[A-Za-z_][A-Za-z0-9_]+ {
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lexer->token.type = cmListFileLexer_Token_Identifier;
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cmListFileLexerSetToken(lexer, yytext, yyleng);
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lexer->column += yyleng;
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return 1;
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}
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({MAKEVAR}|[^ \t\r\n\(\)#\\\"]|\\.)({MAKEVAR}|[^ \t\r\n\(\)#\\\"]|\\.|\"({MAKEVAR}|[^\r\n\(\)#\\\"]|\\.)*\")* {
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lexer->token.type = cmListFileLexer_Token_ArgumentUnquoted;
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cmListFileLexerSetToken(lexer, yytext, yyleng);
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lexer->column += yyleng;
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return 1;
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}
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\" {
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lexer->token.type = cmListFileLexer_Token_ArgumentQuoted;
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cmListFileLexerSetToken(lexer, "", 0);
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lexer->column += yyleng;
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BEGIN(STRING);
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}
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<STRING>([^\\\n\"]|\\(.|\n))+ {
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cmListFileLexerAppend(lexer, yytext, yyleng);
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lexer->column += yyleng;
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}
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<STRING>\n {
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cmListFileLexerAppend(lexer, yytext, yyleng);
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++lexer->line;
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lexer->column = 1;
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}
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<STRING>\" {
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lexer->column += yyleng;
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BEGIN(INITIAL);
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return 1;
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}
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<STRING>. {
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cmListFileLexerAppend(lexer, yytext, yyleng);
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lexer->column += yyleng;
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}
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<STRING><<EOF>> {
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lexer->token.type = cmListFileLexer_Token_BadString;
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BEGIN(INITIAL);
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return 1;
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}
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[ \t\r] {
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lexer->column += yyleng;
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}
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. {
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lexer->token.type = cmListFileLexer_Token_BadCharacter;
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cmListFileLexerSetToken(lexer, yytext, yyleng);
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lexer->column += yyleng;
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return 1;
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}
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<<EOF>> {
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lexer->token.type = cmListFileLexer_Token_None;
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cmListFileLexerSetToken(lexer, 0, 0);
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return 0;
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}
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%%
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/*--------------------------------------------------------------------------*/
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static void cmListFileLexerSetToken(cmListFileLexer* lexer, const char* text,
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int length)
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{
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/* Set the token line and column number. */
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lexer->token.line = lexer->line;
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lexer->token.column = lexer->column;
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/* Use the same buffer if possible. */
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if(lexer->token.text)
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{
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if(text && length < lexer->size)
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{
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strcpy(lexer->token.text, text);
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lexer->token.length = length;
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return;
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}
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free(lexer->token.text);
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lexer->token.text = 0;
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lexer->size = 0;
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}
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/* Need to extend the buffer. */
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if(text)
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{
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lexer->token.text = strdup(text);
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lexer->token.length = length;
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lexer->size = length+1;
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}
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else
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{
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lexer->token.length = 0;
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}
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}
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/*--------------------------------------------------------------------------*/
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static void cmListFileLexerAppend(cmListFileLexer* lexer, const char* text,
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int length)
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{
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char* temp;
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int newSize;
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/* If the appended text will fit in the buffer, do not reallocate. */
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newSize = lexer->token.length + length + 1;
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if(lexer->token.text && newSize <= lexer->size)
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{
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strcpy(lexer->token.text+lexer->token.length, text);
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lexer->token.length += length;
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return;
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}
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/* We need to extend the buffer. */
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temp = malloc(newSize);
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if(lexer->token.text)
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{
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memcpy(temp, lexer->token.text, lexer->token.length);
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free(lexer->token.text);
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}
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memcpy(temp+lexer->token.length, text, length);
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temp[lexer->token.length+length] = 0;
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lexer->token.text = temp;
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lexer->token.length += length;
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lexer->size = newSize;
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}
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/*--------------------------------------------------------------------------*/
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static int cmListFileLexerInput(cmListFileLexer* lexer, char* buffer,
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size_t bufferSize)
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{
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if(lexer)
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{
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if(lexer->file)
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{
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return (int)fread(buffer, 1, bufferSize, lexer->file);
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}
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else if(lexer->string_left)
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{
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int length = lexer->string_left;
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if((int)bufferSize < length) { length = (int)bufferSize; }
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memcpy(buffer, lexer->string_position, length);
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lexer->string_position += length;
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lexer->string_left -= length;
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return length;
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}
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}
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return 0;
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}
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/*--------------------------------------------------------------------------*/
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static void cmListFileLexerInit(cmListFileLexer* lexer)
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{
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if(lexer->file || lexer->string_buffer)
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{
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cmListFileLexer_yylex_init(&lexer->scanner);
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cmListFileLexer_yyset_extra(lexer, lexer->scanner);
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}
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}
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/*--------------------------------------------------------------------------*/
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static void cmListFileLexerDestroy(cmListFileLexer* lexer)
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{
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if(lexer->file || lexer->string_buffer)
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{
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cmListFileLexer_yylex_destroy(lexer->scanner);
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if(lexer->file)
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{
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fclose(lexer->file);
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lexer->file = 0;
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}
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if(lexer->string_buffer)
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{
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free(lexer->string_buffer);
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lexer->string_buffer = 0;
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lexer->string_left = 0;
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lexer->string_position = 0;
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}
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}
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}
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/*--------------------------------------------------------------------------*/
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cmListFileLexer* cmListFileLexer_New()
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{
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cmListFileLexer* lexer = (cmListFileLexer*)malloc(sizeof(cmListFileLexer));
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if(!lexer)
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{
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return 0;
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}
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memset(lexer, 0, sizeof(*lexer));
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lexer->line = 1;
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lexer->column = 1;
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return lexer;
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}
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/*--------------------------------------------------------------------------*/
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void cmListFileLexer_Delete(cmListFileLexer* lexer)
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{
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cmListFileLexer_SetFileName(lexer, 0);
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free(lexer);
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}
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/*--------------------------------------------------------------------------*/
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int cmListFileLexer_SetFileName(cmListFileLexer* lexer, const char* name)
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{
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int result = 1;
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cmListFileLexerDestroy(lexer);
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if(name)
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{
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lexer->file = fopen(name, "r");
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if(!lexer->file)
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{
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result = 0;
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}
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}
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cmListFileLexerInit(lexer);
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return result;
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}
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/*--------------------------------------------------------------------------*/
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int cmListFileLexer_SetString(cmListFileLexer* lexer, const char* text)
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{
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int result = 1;
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cmListFileLexerDestroy(lexer);
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if(text)
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{
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int length = (int)strlen(text);
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lexer->string_buffer = (char*)malloc(length+1);
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if(lexer->string_buffer)
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{
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strcpy(lexer->string_buffer, text);
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lexer->string_position = lexer->string_buffer;
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lexer->string_left = length;
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}
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else
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{
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result = 0;
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}
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}
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cmListFileLexerInit(lexer);
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return result;
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}
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/*--------------------------------------------------------------------------*/
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cmListFileLexer_Token* cmListFileLexer_Scan(cmListFileLexer* lexer)
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{
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if(!lexer->file)
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{
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return 0;
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}
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if(cmListFileLexer_yylex(lexer->scanner, lexer))
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{
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return &lexer->token;
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}
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else
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{
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cmListFileLexer_SetFileName(lexer, 0);
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return 0;
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}
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}
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/*--------------------------------------------------------------------------*/
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long cmListFileLexer_GetCurrentLine(cmListFileLexer* lexer)
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{
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if(lexer->file)
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{
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return lexer->line;
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}
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else
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{
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return 0;
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}
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}
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/*--------------------------------------------------------------------------*/
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long cmListFileLexer_GetCurrentColumn(cmListFileLexer* lexer)
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{
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if(lexer->file)
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{
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return lexer->column;
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}
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else
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{
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return 0;
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}
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}
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/*--------------------------------------------------------------------------*/
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const char* cmListFileLexer_GetTypeAsString(cmListFileLexer* lexer,
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cmListFileLexer_Type type)
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{
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(void)lexer;
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switch(type)
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{
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case cmListFileLexer_Token_None: return "nothing";
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case cmListFileLexer_Token_Newline: return "newline";
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case cmListFileLexer_Token_Identifier: return "identifier";
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case cmListFileLexer_Token_ParenLeft: return "left paren";
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case cmListFileLexer_Token_ParenRight: return "right paren";
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case cmListFileLexer_Token_ArgumentUnquoted: return "unquoted argument";
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case cmListFileLexer_Token_ArgumentQuoted: return "quoted argument";
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case cmListFileLexer_Token_BadCharacter: return "bad character";
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case cmListFileLexer_Token_BadString: return "unterminated string";
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}
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return "unknown token";
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}
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