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Add support for ungetc, fix non standard compliant behaviour

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git-svn-id: svn://svn.cc65.org/cc65/trunk@3037 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2004-05-13 21:54:01 +00:00
parent dc16edb6b2
commit d44cdad9ce
1 changed files with 15 additions and 4 deletions
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17
libsrc/common/ftell.c
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@ -1,7 +1,8 @@
/*
* ftell.c
*
* Christian Groessler, 07-Aug-2000
* Christian Groessler, 2000-08-07
* Ullrich von Bassewitz, 2004-05-13
*/
@ -19,7 +20,7 @@
long __fastcall__ ftell (FILE* f)
long __fastcall__ ftell (register FILE* f)
{
long pos;
@ -29,7 +30,17 @@ long __fastcall__ ftell (FILE* f)
return -1L;
}
/* Call the low level function */
pos = lseek (f->f_fd, 0L, SEEK_CUR);
return pos; /* -1 for error, comes from lseek() */
/* If we didn't have an error, correct the return value in case we have
* a pushed back character.
*/
if (pos > 0 && (f->f_flags & _FPUSHBACK)) {
--pos;
}
/* -1 for error, comes from lseek() */
return pos;
}