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Allow escape sequences prefixed by '%' in strings. '%%' denotes a single

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percent sign, %O is the name of the output file.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4628 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2010-03-20 17:48:15 +00:00
parent b759e753e4
commit 7450c25404
1 changed files with 67 additions and 12 deletions
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79
src/ld65/scanner.c
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@ -164,6 +164,72 @@ static unsigned DigitVal (int C)
static void StrVal (void)
/* Parse a string value and expand escape sequences */
{
/* Skip the starting double quotes */
NextChar ();
/* Read input chars */
SB_Clear (&CfgSVal);
while (C != '\"') {
switch (C) {
case EOF:
case '\n':
CfgError ("Unterminated string");
break;
case '%':
NextChar ();
switch (C) {
case EOF:
case '\n':
case '\"':
CfgError ("Unterminated '%%' escape sequence");
break;
case '%':
SB_AppendChar (&CfgSVal, '%');
NextChar ();
break;
case 'O':
/* Replace by output file */
if (OutputName) {
SB_AppendStr (&CfgSVal, OutputName);
}
NextChar ();
break;
default:
CfgWarning ("Unkown escape sequence `%%%c'", C);
SB_AppendChar (&CfgSVal, '%');
SB_AppendChar (&CfgSVal, C);
NextChar ();
break;
}
break;
default:
SB_AppendChar (&CfgSVal, C);
NextChar ();
}
}
/* Skip the terminating double quotes */
NextChar ();
/* Terminate the string */
SB_Terminate (&CfgSVal);
/* We've read a string value */
CfgTok = CFGTOK_STRCON;
}
void CfgNextTok (void)
/* Read the next token from the input stream */
{
@ -286,18 +352,7 @@ Again:
break;
case '\"':
NextChar ();
SB_Clear (&CfgSVal);
while (C != '\"') {
if (C == EOF || C == '\n') {
CfgError ("Unterminated string");
}
SB_AppendChar (&CfgSVal, C);
NextChar ();
}
NextChar ();
SB_Terminate (&CfgSVal);
CfgTok = CFGTOK_STRCON;
StrVal ();
break;
case '#':