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Properly handle string and char constants when preprocessing: don't unescape and keep surrounding quotes

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This commit is contained in:
Wolfgang (Blub) Bumiller 2012-11-02 18:48:32 +01:00
parent b219d4b468
commit b5970707c0
2 changed files with 26 additions and 17 deletions
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16
lexer.c
View file

@ -381,10 +381,10 @@ static int lex_skipwhite(lex_file *lex)
if (ch == '/')
{
/* one line comment */
haswhite = true;
ch = lex_getch(lex);
if (lex->flags.preprocessing) {
haswhite = true;
if (!lex_tokench(lex, '/') ||
!lex_tokench(lex, '/'))
{
@ -408,8 +408,8 @@ static int lex_skipwhite(lex_file *lex)
if (ch == '*')
{
/* multiline comment */
haswhite = true;
if (lex->flags.preprocessing) {
haswhite = true;
if (!lex_tokench(lex, '/') ||
!lex_tokench(lex, '*'))
{
@ -550,7 +550,7 @@ static int GMQCC_WARN lex_finish_string(lex_file *lex, int quote)
if (ch == quote)
return TOKEN_STRINGCONST;
if (ch == '\\') {
if (!lex->flags.preprocessing && ch == '\\') {
ch = lex_getch(lex);
if (ch == EOF) {
lexerror(lex, "unexpected end of file");
@ -1066,8 +1066,12 @@ int lex_do(lex_file *lex)
if (ch == '"')
{
lex->flags.nodigraphs = true;
if (lex->flags.preprocessing && !lex_tokench(lex, ch))
return TOKEN_FATAL;
lex->tok.ttype = lex_finish_string(lex, '"');
while (lex->tok.ttype == TOKEN_STRINGCONST)
if (lex->flags.preprocessing && !lex_tokench(lex, ch))
return TOKEN_FATAL;
while (!lex->flags.preprocessing && lex->tok.ttype == TOKEN_STRINGCONST)
{
/* Allow c style "string" "continuation" */
ch = lex_skipwhite(lex);
@ -1091,7 +1095,11 @@ int lex_do(lex_file *lex)
* Likewise actual unescaping has to be done by the parser.
* The difference is we don't allow 'char' 'continuation'.
*/
if (lex->flags.preprocessing && !lex_tokench(lex, ch))
return TOKEN_FATAL;
lex->tok.ttype = lex_finish_string(lex, '\'');
if (lex->flags.preprocessing && !lex_tokench(lex, ch))
return TOKEN_FATAL;
if (!lex_endtoken(lex))
return (lex->tok.ttype = TOKEN_FATAL);

5
preprocess.c
View file

@ -9,7 +9,7 @@ bool preprocess(const char *filename)
do {
tok = lex_do(lex);
/*
#if 0
if (tok == TOKEN_EOL)
printf("EOL");
else if (tok >= TOKEN_START && tok <= TOKEN_FATAL)
@ -20,13 +20,14 @@ bool preprocess(const char *filename)
printf(">>%s<<\n", lex->tok.value);
else
printf("\n");
*/
#else
if (tok == TOKEN_EOL)
printf("\n");
else if (tok >= TOKEN_START && tok < TOKEN_EOF)
printf("%s", lex->tok.value);
else
printf("%c", tok);
#endif
} while (tok < TOKEN_EOF);
lex_close(lex);