CMake/Source/cmListFileLexer.in.l

411 lines
9.7 KiB
Plaintext
Raw Normal View History

%{
/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
/*
This file must be translated to C and modified to build everywhere.
Run flex like this:
flex -ocmListFileLexer.c cmListFileLexer.in.l
Modify cmListFileLexer.c:
- remove TABs
- remove the yyunput function
- add a statement "(void)yyscanner;" to the top of these methods:
yy_fatal_error, yyalloc, yyrealloc, yyfree
- remove all YY_BREAK lines occurring right after return statements
*/
/* Disable features we do not need. */
#define YY_NEVER_INTERACTIVE 1
#define YY_NO_UNPUT 1
#define YY_NO_UNISTD_H 1
#define ECHO
/* Setup the proper yylex declaration. */
#define YY_EXTRA_TYPE cmListFileLexer*
#define YY_DECL int yylex (yyscan_t yyscanner, cmListFileLexer* lexer)
/* Disable some warnings. */
#if defined(_MSC_VER)
# pragma warning ( disable : 4127 )
# pragma warning ( disable : 4131 )
# pragma warning ( disable : 4244 )
# pragma warning ( disable : 4251 )
# pragma warning ( disable : 4267 )
# pragma warning ( disable : 4305 )
# pragma warning ( disable : 4309 )
# pragma warning ( disable : 4706 )
# pragma warning ( disable : 4786 )
#endif
#include "cmListFileLexer.h"
/*--------------------------------------------------------------------------*/
struct cmListFileLexer_s
{
cmListFileLexer_Token token;
int line;
int column;
int size;
FILE* file;
char* string_buffer;
char* string_position;
int string_left;
yyscan_t scanner;
};
static void cmListFileLexerSetToken(cmListFileLexer* lexer, const char* text,
int length);
static void cmListFileLexerAppend(cmListFileLexer* lexer, const char* text,
int length);
static int cmListFileLexerInput(cmListFileLexer* lexer, char* buffer,
size_t bufferSize);
static void cmListFileLexerInit(cmListFileLexer* lexer);
static void cmListFileLexerDestroy(cmListFileLexer* lexer);
/* Replace the lexer input function. */
#undef YY_INPUT
#define YY_INPUT(buf, result, max_size) \
{ result = cmListFileLexerInput(yyget_extra(yyscanner), buf, max_size); }
/*--------------------------------------------------------------------------*/
%}
%option reentrant
%option yylineno
%option noyywrap
%pointer
%x STRING
%%
\n {
lexer->token.type = cmListFileLexer_Token_Newline;
cmListFileLexerSetToken(lexer, yytext, yyleng);
++lexer->line;
lexer->column = 1;
return 1;
}
#.* {
lexer->column += yyleng;
}
\( {
lexer->token.type = cmListFileLexer_Token_ParenLeft;
cmListFileLexerSetToken(lexer, yytext, yyleng);
lexer->column += yyleng;
return 1;
}
\) {
lexer->token.type = cmListFileLexer_Token_ParenRight;
cmListFileLexerSetToken(lexer, yytext, yyleng);
lexer->column += yyleng;
return 1;
}
[A-Za-z_][A-Za-z0-9_]+ {
lexer->token.type = cmListFileLexer_Token_Identifier;
cmListFileLexerSetToken(lexer, yytext, yyleng);
lexer->column += yyleng;
return 1;
}
([^ \t\r\n\(\)\"\\]|\\.)+ {
lexer->token.type = cmListFileLexer_Token_ArgumentUnquoted;
cmListFileLexerSetToken(lexer, yytext, yyleng);
lexer->column += yyleng;
return 1;
}
\" {
lexer->token.type = cmListFileLexer_Token_ArgumentQuoted;
cmListFileLexerSetToken(lexer, "", 0);
lexer->column += yyleng;
BEGIN(STRING);
}
<STRING>([^\\\n\"]|\\(.|\n))+ {
cmListFileLexerAppend(lexer, yytext, yyleng);
lexer->column += yyleng;
}
<STRING>\n {
cmListFileLexerAppend(lexer, yytext, yyleng);
++lexer->line;
lexer->column = 1;
}
<STRING>\" {
lexer->column += yyleng;
BEGIN(INITIAL);
return 1;
}
<STRING>. {
cmListFileLexerAppend(lexer, yytext, yyleng);
lexer->column += yyleng;
}
[ \t\r] {
lexer->column += yyleng;
}
. {
lexer->token.type = cmListFileLexer_Token_Error;
cmListFileLexerSetToken(lexer, yytext, yyleng);
lexer->column += yyleng;
return 1;
}
<<EOF>> {
lexer->token.type = cmListFileLexer_Token_None;
cmListFileLexerSetToken(lexer, 0, 0);
return 0;
}
%%
/*--------------------------------------------------------------------------*/
static void cmListFileLexerSetToken(cmListFileLexer* lexer, const char* text,
int length)
{
/* Set the token line and column number. */
lexer->token.line = lexer->line;
lexer->token.column = lexer->column;
/* Use the same buffer if possible. */
if(lexer->token.text)
{
if(text && length < lexer->size)
{
strcpy(lexer->token.text, text);
lexer->token.length = length;
return;
}
free(lexer->token.text);
lexer->token.text = 0;
lexer->size = 0;
}
/* Need to extend the buffer. */
if(text)
{
lexer->token.text = strdup(text);
lexer->token.length = length;
lexer->size = length+1;
}
else
{
lexer->token.length = 0;
}
}
/*--------------------------------------------------------------------------*/
static void cmListFileLexerAppend(cmListFileLexer* lexer, const char* text,
int length)
{
char* temp;
int newSize;
/* If the appended text will fit in the buffer, do not reallocate. */
newSize = lexer->token.length + length + 1;
if(lexer->token.text && newSize <= lexer->size)
{
strcpy(lexer->token.text+lexer->token.length, text);
lexer->token.length += length;
return;
}
/* We need to extend the buffer. */
temp = malloc(newSize);
if(lexer->token.text)
{
memcpy(temp, lexer->token.text, lexer->token.length);
free(lexer->token.text);
}
memcpy(temp+lexer->token.length, text, length);
temp[lexer->token.length+length] = 0;
lexer->token.text = temp;
lexer->token.length += length;
lexer->size = newSize;
}
/*--------------------------------------------------------------------------*/
static int cmListFileLexerInput(cmListFileLexer* lexer, char* buffer,
size_t bufferSize)
{
if(lexer)
{
if(lexer->file)
{
return (int)fread(buffer, 1, bufferSize, lexer->file);
}
else if(lexer->string_left)
{
int length = lexer->string_left;
if((int)bufferSize < length) { length = (int)bufferSize; }
memcpy(buffer, lexer->string_position, length);
lexer->string_position += length;
lexer->string_left -= length;
return length;
}
}
return 0;
}
/*--------------------------------------------------------------------------*/
static void cmListFileLexerInit(cmListFileLexer* lexer)
{
if(lexer->file || lexer->string_buffer)
{
yylex_init(&lexer->scanner);
yyset_extra(lexer, lexer->scanner);
}
}
/*--------------------------------------------------------------------------*/
static void cmListFileLexerDestroy(cmListFileLexer* lexer)
{
if(lexer->file || lexer->string_buffer)
{
yylex_destroy(lexer->scanner);
if(lexer->file)
{
fclose(lexer->file);
lexer->file = 0;
}
if(lexer->string_buffer)
{
free(lexer->string_buffer);
lexer->string_buffer = 0;
lexer->string_left = 0;
lexer->string_position = 0;
}
}
}
/*--------------------------------------------------------------------------*/
cmListFileLexer* cmListFileLexer_New()
{
cmListFileLexer* lexer = (cmListFileLexer*)malloc(sizeof(cmListFileLexer));
if(!lexer)
{
return 0;
}
memset(lexer, 0, sizeof(*lexer));
lexer->line = 1;
lexer->column = 1;
return lexer;
}
/*--------------------------------------------------------------------------*/
void cmListFileLexer_Delete(cmListFileLexer* lexer)
{
cmListFileLexer_SetFileName(lexer, 0);
free(lexer);
}
/*--------------------------------------------------------------------------*/
int cmListFileLexer_SetFileName(cmListFileLexer* lexer, const char* name)
{
int result = 1;
cmListFileLexerDestroy(lexer);
if(name)
{
lexer->file = fopen(name, "r");
if(!lexer->file)
{
result = 0;
}
}
cmListFileLexerInit(lexer);
return result;
}
/*--------------------------------------------------------------------------*/
int cmListFileLexer_SetString(cmListFileLexer* lexer, const char* text)
{
int result = 1;
cmListFileLexerDestroy(lexer);
if(text)
{
int length = (int)strlen(text);
lexer->string_buffer = (char*)malloc(length+1);
if(lexer->string_buffer)
{
strcpy(lexer->string_buffer, text);
lexer->string_position = lexer->string_buffer;
lexer->string_left = length;
}
else
{
result = 0;
}
}
cmListFileLexerInit(lexer);
return result;
}
/*--------------------------------------------------------------------------*/
cmListFileLexer_Token* cmListFileLexer_Scan(cmListFileLexer* lexer)
{
if(!lexer->file)
{
return 0;
}
if(yylex(lexer->scanner, lexer))
{
return &lexer->token;
}
else
{
cmListFileLexer_SetFileName(lexer, 0);
return 0;
}
}
/*--------------------------------------------------------------------------*/
long cmListFileLexer_GetCurrentLine(cmListFileLexer* lexer)
{
if(lexer->file)
{
return lexer->line;
}
else
{
return 0;
}
}
/*--------------------------------------------------------------------------*/
long cmListFileLexer_GetCurrentColumn(cmListFileLexer* lexer)
{
if(lexer->file)
{
return lexer->column;
}
else
{
return 0;
}
}