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(scm_peek_char): Safe the column of the port around the getc/ungetc

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calls.  Thanks to Dr. Peter Ivanyi!
This commit is contained in:
Marius Vollmer 2003-06-09 20:02:20 +00:00
parent ae0bdfe00d
commit 1a973c42e2
1 changed files with 3 additions and 1 deletions
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4
libguile/ports.c
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@ -1198,15 +1198,17 @@ SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0,
"to @code{read-char} would have hung.}")
#define FUNC_NAME s_scm_peek_char
{
int c;
int c, column;
if (SCM_UNBNDP (port))
port = scm_cur_inp;
else
SCM_VALIDATE_OPINPORT (1, port);
column = SCM_COL(port);
c = scm_getc (port);
if (EOF == c)
return SCM_EOF_VAL;
scm_ungetc (c, port);
SCM_COL(port) = column;
return SCM_MAKE_CHAR (c);
}
#undef FUNC_NAME