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dgamelaunch
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Avoid calling lseek() on a descriptor managed by stdio. 

This often leads to undefined behaviour.
Function: set_seek_offset_clrscr()


git-svn-id: svn://katsu.triplehelix.org/dgamelaunch/trunk@153 db0b04b0-f4d1-0310-9a6d-de3e77497b0e
This commit is contained in:
Jilles Tjoelker 2004-01-23 18:21:07 +00:00
parent e52f31146b
commit eaaf80eb43
1 changed files with 6 additions and 6 deletions
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12
ttyplay.c
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@ -258,7 +258,7 @@ ttyplay (FILE * fp, double speed, ReadFunc read_func,
/* for dtype's attempt to get the last clrscr and playback from there */
if (offset)
{
lseek (fileno (fp), offset, SEEK_SET);
fseek (fp, offset, SEEK_SET);
}
while (1)
@ -293,10 +293,10 @@ set_seek_offset_clrscr (FILE * fp)
int i;
int bytesread;
lseek (fileno (fp), 0, SEEK_SET);
fstat (fileno (fp), &mystat);
buf = malloc (mystat.st_size);
bytesread = read (fileno (fp), buf, mystat.st_size);
fseek (fp, 0, SEEK_SET);
bytesread = fread (buf, 1, mystat.st_size, fp);
/* one byte at at time sucks, but is a simple hack for the temp
* being to avoid looking for wraparounds */
@ -332,7 +332,7 @@ set_seek_offset_clrscr (FILE * fp)
free (buf);
/* now find last filepos that is less than seek offset */
lseek (fileno (fp), 0, SEEK_SET);
fseek (fp, 0, SEEK_SET);
while (1)
{
char *buf;
@ -343,9 +343,9 @@ set_seek_offset_clrscr (FILE * fp)
break;
}
if (lseek (fileno (fp), 0, SEEK_CUR) < raw_seek_offset)
if (ftell (fp) < raw_seek_offset)
{
seek_offset_clrscr = lseek (fileno (fp), 0, SEEK_CUR);
seek_offset_clrscr = ftell (fp);
}
free (buf);