CMake/Source/cmListFileLexer.in.l

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%{
/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
/*
This file must be translated to C and modified to build everywhere.
Run flex like this:
flex --prefix=cmListFileLexer_yy -ocmListFileLexer.c cmListFileLexer.in.l
Modify cmListFileLexer.c:
- remove TABs
- remove use of the 'register' storage class specifier
- remove the yyunput function
- add a statement "(void)yyscanner;" to the top of these methods:
yy_fatal_error, cmListFileLexer_yyalloc, cmListFileLexer_yyrealloc, cmListFileLexer_yyfree
- remove statement "yyscanner = NULL;" from cmListFileLexer_yylex_destroy
- remove all YY_BREAK lines occurring right after return statements
- remove the isatty forward declaration
*/
#include "cmStandardLexer.h"
/* Setup the proper cmListFileLexer_yylex declaration. */
#define YY_EXTRA_TYPE cmListFileLexer*
#define YY_DECL int cmListFileLexer_yylex (yyscan_t yyscanner, cmListFileLexer* lexer)
#include "cmListFileLexer.h"
/*--------------------------------------------------------------------------*/
struct cmListFileLexer_s
{
cmListFileLexer_Token token;
int bracket;
int comment;
int line;
int column;
int size;
FILE* file;
size_t cr;
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(cmListFileLexer_yyget_extra(yyscanner), buf, max_size); }
/*--------------------------------------------------------------------------*/
%}
%option reentrant
%option yylineno
%option noyywrap
%pointer
%x STRING
%x BRACKET
%x BRACKETEND
%x COMMENT
MAKEVAR \$\([A-Za-z0-9_]*\)
UNQUOTED ([^ \t\r\n\(\)#\\\"[=]|\\.)
LEGACY {MAKEVAR}|{UNQUOTED}|\"({MAKEVAR}|{UNQUOTED}|[ \t[=])*\"
%%
<INITIAL,COMMENT>\n {
lexer->token.type = cmListFileLexer_Token_Newline;
cmListFileLexerSetToken(lexer, yytext, yyleng);
++lexer->line;
lexer->column = 1;
BEGIN(INITIAL);
return 1;
}
#?\[=*\[\n? {
const char* bracket = yytext;
lexer->comment = yytext[0] == '#';
if(lexer->comment)
{
lexer->token.type = cmListFileLexer_Token_CommentBracket;
bracket += 1;
}
else
{
lexer->token.type = cmListFileLexer_Token_ArgumentBracket;
}
cmListFileLexerSetToken(lexer, "", 0);
lexer->bracket = (int)(strchr(bracket+1, '[') - bracket);
if(yytext[yyleng-1] == '\n')
{
++lexer->line;
lexer->column = 1;
}
else
{
lexer->column += yyleng;
}
BEGIN(BRACKET);
}
# {
lexer->column += yyleng;
BEGIN(COMMENT);
}
<COMMENT>.* {
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;
}
<BRACKET>\]=* {
/* Handle ]]====]=======]*/
cmListFileLexerAppend(lexer, yytext, yyleng);
lexer->column += yyleng;
if(yyleng == lexer->bracket)
{
BEGIN(BRACKETEND);
}
}
<BRACKETEND>\] {
lexer->column += yyleng;
/* Erase the partial bracket from the token. */
lexer->token.length -= lexer->bracket;
lexer->token.text[lexer->token.length] = 0;
BEGIN(INITIAL);
return 1;
}
<BRACKET>([^]\n])+ {
cmListFileLexerAppend(lexer, yytext, yyleng);
lexer->column += yyleng;
}
<BRACKET,BRACKETEND>\n {
cmListFileLexerAppend(lexer, yytext, yyleng);
++lexer->line;
lexer->column = 1;
BEGIN(BRACKET);
}
<BRACKET,BRACKETEND>. {
cmListFileLexerAppend(lexer, yytext, yyleng);
lexer->column += yyleng;
BEGIN(BRACKET);
}
<BRACKET,BRACKETEND><<EOF>> {
lexer->token.type = cmListFileLexer_Token_BadBracket;
BEGIN(INITIAL);
return 1;
}
({UNQUOTED}|=|\[=*{UNQUOTED})({UNQUOTED}|[[=])* {
lexer->token.type = cmListFileLexer_Token_ArgumentUnquoted;
cmListFileLexerSetToken(lexer, yytext, yyleng);
lexer->column += yyleng;
return 1;
}
({MAKEVAR}|{UNQUOTED}|=|\[=*{LEGACY})({LEGACY}|[[=])* {
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\"]|\\.)+ {
cmListFileLexerAppend(lexer, yytext, yyleng);
lexer->column += yyleng;
}
<STRING>\\\n {
/* Continuation: text is not part of string */
++lexer->line;
lexer->column = 1;
}
<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;
}
<STRING><<EOF>> {
lexer->token.type = cmListFileLexer_Token_BadString;
BEGIN(INITIAL);
return 1;
}
[ \t\r]+ {
lexer->token.type = cmListFileLexer_Token_Space;
cmListFileLexerSetToken(lexer, yytext, yyleng);
lexer->column += yyleng;
return 1;
}
. {
lexer->token.type = cmListFileLexer_Token_BadCharacter;
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)
{
/* Convert CRLF -> LF explicitly. The C FILE "t"ext mode
does not convert newlines on all platforms. Move any
trailing CR to the start of the buffer for the next read. */
size_t cr = lexer->cr;
size_t n;
buffer[0] = '\r';
n = fread(buffer+cr, 1, bufferSize-cr, lexer->file);
if(n)
{
char* o = buffer;
const char* i = buffer;
const char* e;
n += cr;
cr = (buffer[n-1] == '\r')? 1:0;
e = buffer + n - cr;
while(i != e)
{
if(i[0] == '\r' && i[1] == '\n')
{
++i;
}
*o++ = *i++;
}
n = o - buffer;
}
else
{
n = cr;
cr = 0;
}
lexer->cr = cr;
return n;
}
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)
{
cmListFileLexer_yylex_init(&lexer->scanner);
cmListFileLexer_yyset_extra(lexer, lexer->scanner);
}
}
/*--------------------------------------------------------------------------*/
static void cmListFileLexerDestroy(cmListFileLexer* lexer)
{
cmListFileLexerSetToken(lexer, 0, 0);
if(lexer->file || lexer->string_buffer)
{
cmListFileLexer_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, 0);
free(lexer);
}
/*--------------------------------------------------------------------------*/
static cmListFileLexer_BOM cmListFileLexer_ReadBOM(FILE* f)
{
unsigned char b[2];
if(fread(b, 1, 2, f) == 2)
{
if(b[0] == 0xEF && b[1] == 0xBB)
{
if(fread(b, 1, 1, f) == 1 && b[0] == 0xBF)
{
return cmListFileLexer_BOM_UTF8;
}
}
else if(b[0] == 0xFE && b[1] == 0xFF)
{
/* UTF-16 BE */
return cmListFileLexer_BOM_UTF16BE;
}
else if(b[0] == 0 && b[1] == 0)
{
if(fread(b, 1, 2, f) == 2 && b[0] == 0xFE && b[1] == 0xFF)
{
return cmListFileLexer_BOM_UTF32BE;
}
}
else if(b[0] == 0xFF && b[1] == 0xFE)
{
fpos_t p;
fgetpos(f, &p);
if(fread(b, 1, 2, f) == 2 && b[0] == 0 && b[1] == 0)
{
return cmListFileLexer_BOM_UTF32LE;
}
fsetpos(f, &p);
return cmListFileLexer_BOM_UTF16LE;
}
}
rewind(f);
return cmListFileLexer_BOM_None;
}
/*--------------------------------------------------------------------------*/
int cmListFileLexer_SetFileName(cmListFileLexer* lexer, const char* name,
cmListFileLexer_BOM* bom)
{
int result = 1;
cmListFileLexerDestroy(lexer);
if(name)
{
lexer->file = fopen(name, "rb");
if(lexer->file)
{
if(bom)
{
*bom = cmListFileLexer_ReadBOM(lexer->file);
}
}
else
{
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(cmListFileLexer_yylex(lexer->scanner, lexer))
{
return &lexer->token;
}
else
{
cmListFileLexer_SetFileName(lexer, 0, 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;
}
}
/*--------------------------------------------------------------------------*/
const char* cmListFileLexer_GetTypeAsString(cmListFileLexer* lexer,
cmListFileLexer_Type type)
{
(void)lexer;
switch(type)
{
case cmListFileLexer_Token_None: return "nothing";
case cmListFileLexer_Token_Space: return "space";
case cmListFileLexer_Token_Newline: return "newline";
case cmListFileLexer_Token_Identifier: return "identifier";
case cmListFileLexer_Token_ParenLeft: return "left paren";
case cmListFileLexer_Token_ParenRight: return "right paren";
case cmListFileLexer_Token_ArgumentUnquoted: return "unquoted argument";
case cmListFileLexer_Token_ArgumentQuoted: return "quoted argument";
case cmListFileLexer_Token_ArgumentBracket: return "bracket argument";
case cmListFileLexer_Token_CommentBracket: return "bracket comment";
case cmListFileLexer_Token_BadCharacter: return "bad character";
case cmListFileLexer_Token_BadBracket: return "unterminated bracket";
case cmListFileLexer_Token_BadString: return "unterminated string";
}
return "unknown token";
}