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569 lines
14 KiB
569 lines
14 KiB
%{
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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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 >= 2.6 like this:
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flex --nounistd -DFLEXINT_H --noline -ocmListFileLexer.c cmListFileLexer.in.l
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Modify cmListFileLexer.c:
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- remove trailing whitespace: sed -i 's/\s*$//' cmListFileLexer.c
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- remove blank lines at end of file: sed -i '${/^$/d;}' cmListFileLexer.c
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- #include "cmStandardLexer.h" at the top: sed -i '1i#include "cmStandardLexer.h"' cmListFileLexer.c
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*/
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/* IWYU pragma: no_forward_declare yyguts_t */
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#ifdef WIN32
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#include "cmsys/Encoding.h"
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#endif
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/* Setup the proper cmListFileLexer_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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#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 bracket;
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int comment;
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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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size_t cr;
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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 prefix="cmListFileLexer_yy"
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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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%x BRACKET
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%x BRACKETEND
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%x COMMENT
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MAKEVAR \$\([A-Za-z0-9_]*\)
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UNQUOTED ([^ \0\t\r\n\(\)#\\\"[=]|\\[^\0\n])
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LEGACY {MAKEVAR}|{UNQUOTED}|\"({MAKEVAR}|{UNQUOTED}|[ \t[=])*\"
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%%
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<INITIAL,COMMENT>\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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BEGIN(INITIAL);
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return 1;
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}
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#?\[=*\[\n? {
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const char* bracket = yytext;
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lexer->comment = yytext[0] == '#';
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if (lexer->comment) {
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lexer->token.type = cmListFileLexer_Token_CommentBracket;
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bracket += 1;
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} else {
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lexer->token.type = cmListFileLexer_Token_ArgumentBracket;
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}
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cmListFileLexerSetToken(lexer, "", 0);
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lexer->bracket = strchr(bracket+1, '[') - bracket;
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if (yytext[yyleng-1] == '\n') {
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++lexer->line;
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lexer->column = 1;
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} else {
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lexer->column += yyleng;
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}
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BEGIN(BRACKET);
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}
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# {
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lexer->column += yyleng;
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BEGIN(COMMENT);
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}
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<COMMENT>[^\0\n]* {
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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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<BRACKET>\]=* {
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/* Handle ]]====]=======]*/
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cmListFileLexerAppend(lexer, yytext, yyleng);
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lexer->column += yyleng;
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if (yyleng == lexer->bracket) {
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BEGIN(BRACKETEND);
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}
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}
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<BRACKETEND>\] {
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lexer->column += yyleng;
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/* Erase the partial bracket from the token. */
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lexer->token.length -= lexer->bracket;
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lexer->token.text[lexer->token.length] = 0;
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BEGIN(INITIAL);
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return 1;
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}
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<BRACKET>([^]\0\n])+ {
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cmListFileLexerAppend(lexer, yytext, yyleng);
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lexer->column += yyleng;
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}
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<BRACKET,BRACKETEND>\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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BEGIN(BRACKET);
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}
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<BRACKET,BRACKETEND>[^\0\n] {
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cmListFileLexerAppend(lexer, yytext, yyleng);
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lexer->column += yyleng;
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BEGIN(BRACKET);
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}
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<BRACKET,BRACKETEND><<EOF>> {
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lexer->token.type = cmListFileLexer_Token_BadBracket;
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BEGIN(INITIAL);
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return 1;
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}
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({UNQUOTED}|=|\[=*{UNQUOTED})({UNQUOTED}|[[=])* {
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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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({MAKEVAR}|{UNQUOTED}|=|\[=*{LEGACY})({LEGACY}|[[=])* {
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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_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>([^\\\0\n\"]|\\[^\0\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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/* Continuation: text is not part of string */
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++lexer->line;
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lexer->column = 1;
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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>[^\0\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><<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->token.type = cmListFileLexer_Token_Space;
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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_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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if (text && length < lexer->size) {
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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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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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} else {
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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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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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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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if (lexer->file) {
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/* Convert CRLF -> LF explicitly. The C FILE "t"ext mode
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does not convert newlines on all platforms. Move any
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trailing CR to the start of the buffer for the next read. */
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size_t cr = lexer->cr;
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size_t n;
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buffer[0] = '\r';
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n = fread(buffer + cr, 1, bufferSize - cr, lexer->file);
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if (n) {
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char* o = buffer;
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const char* i = buffer;
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const char* e;
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n += cr;
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cr = (buffer[n - 1] == '\r') ? 1 : 0;
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e = buffer + n - cr;
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while (i != e) {
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if (i[0] == '\r' && i[1] == '\n') {
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++i;
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}
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*o++ = *i++;
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}
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n = o - buffer;
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} else {
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n = cr;
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cr = 0;
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}
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lexer->cr = cr;
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return n;
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} else if (lexer->string_left) {
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int length = lexer->string_left;
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if ((int)bufferSize < length) {
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length = (int)bufferSize;
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}
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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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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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cmListFileLexerSetToken(lexer, 0, 0);
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if (lexer->file || lexer->string_buffer) {
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cmListFileLexer_yylex_destroy(lexer->scanner);
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if (lexer->file) {
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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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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(void)
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{
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cmListFileLexer* lexer = (cmListFileLexer*)malloc(sizeof(cmListFileLexer));
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if (!lexer) {
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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, 0);
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free(lexer);
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}
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/*--------------------------------------------------------------------------*/
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static cmListFileLexer_BOM cmListFileLexer_ReadBOM(FILE* f)
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{
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unsigned char b[2];
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if (fread(b, 1, 2, f) == 2) {
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if (b[0] == 0xEF && b[1] == 0xBB) {
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if (fread(b, 1, 1, f) == 1 && b[0] == 0xBF) {
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return cmListFileLexer_BOM_UTF8;
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}
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} else if (b[0] == 0xFE && b[1] == 0xFF) {
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/* UTF-16 BE */
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return cmListFileLexer_BOM_UTF16BE;
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|
} else if (b[0] == 0 && b[1] == 0) {
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if (fread(b, 1, 2, f) == 2 && b[0] == 0xFE && b[1] == 0xFF) {
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return cmListFileLexer_BOM_UTF32BE;
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}
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|
} else if (b[0] == 0xFF && b[1] == 0xFE) {
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fpos_t p;
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fgetpos(f, &p);
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if (fread(b, 1, 2, f) == 2 && b[0] == 0 && b[1] == 0) {
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return cmListFileLexer_BOM_UTF32LE;
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}
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|
if (fsetpos(f, &p) != 0) {
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return cmListFileLexer_BOM_Broken;
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|
}
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|
return cmListFileLexer_BOM_UTF16LE;
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|
}
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|
}
|
|
if (fseek(f, 0, SEEK_SET) != 0) {
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|
return cmListFileLexer_BOM_Broken;
|
|
}
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|
return cmListFileLexer_BOM_None;
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|
}
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|
|
|
/*--------------------------------------------------------------------------*/
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|
int cmListFileLexer_SetFileName(cmListFileLexer* lexer, const char* name,
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|
cmListFileLexer_BOM* bom)
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|
{
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|
int result = 1;
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|
cmListFileLexerDestroy(lexer);
|
|
if (name) {
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|
#ifdef _WIN32
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|
wchar_t* wname = cmsysEncoding_DupToWide(name);
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lexer->file = _wfopen(wname, L"rb");
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|
free(wname);
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|
#else
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|
lexer->file = fopen(name, "rb");
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|
#endif
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|
if (lexer->file) {
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|
if (bom) {
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|
*bom = cmListFileLexer_ReadBOM(lexer->file);
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|
}
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|
} else {
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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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|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
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);
|
|
if (text) {
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|
int length = (int)strlen(text);
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|
lexer->string_buffer = (char*)malloc(length + 1);
|
|
if (lexer->string_buffer) {
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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;
|
|
} else {
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|
result = 0;
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|
}
|
|
}
|
|
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";
|
|
}
|