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compel: std_vprint_num returns a null-terminated string

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This function is an analogue to vsprintf(), and is used in very much the
same way. The caller expects the modified string pointer to be pointing to
a null-terminated string.

Signed-off-by: Joel Nider <joeln@il.ibm.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
This commit is contained in:
Joel Nider 2018-05-08 10:33:27 +03:00 • committed by Andrei Vagin
parent 5d3ea878fb
commit a80f1da90c
1 changed files with 3 additions and 3 deletions
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6
compel/plugins/std/log.c
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@ -143,6 +143,7 @@ int std_vprint_num(char *buf, int blen, int num, char **ps)
char *s;
s = &buf[blen - 1];
*s-- = 0; /* make sure the returned string is NULL terminated */
if (num < 0) {
neg = 1;
@ -166,15 +167,14 @@ int std_vprint_num(char *buf, int blen, int num, char **ps)
done:
s++;
*ps = s;
return blen - (s - buf);
return blen - (s - buf) - 1;
}
static void print_num(int num, struct simple_buf *b)
{
char buf[12], *s;
buf[11] = '\0';
std_vprint_num(buf, sizeof(buf) - 1, num, &s);
std_vprint_num(buf, sizeof(buf), num, &s);
print_string(s, b);
}