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command: add a parser for range arguments

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A range argument looks like start[:end] and is used to specify the entries
of a list that should be returned (rather than the whole list).
This commit is contained in:
Thomas Jansen 2009-01-09 17:06:40 +01:00 committed by Max Kellermann
parent 5e93d3682f
commit 8ed3cf3e6b
1 changed files with 48 additions and 0 deletions
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48
src/command.c
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@ -160,6 +160,54 @@ check_int(struct client *client, int *value_r,
return true;
}
static bool G_GNUC_PRINTF(5, 6)
check_range(struct client *client, int *value_r1, int *value_r2,
const char *s, const char *fmt, ...)
{
char *test, *test2;
long value;
value = strtol(s, &test, 10);
if (*test != '\0' && *test != ':') {
va_list args;
va_start(args, fmt);
command_error_v(client, ACK_ERROR_ARG, fmt, args);
va_end(args);
return false;
}
#if LONG_MAX > INT_MAX
if (value < INT_MIN || value > INT_MAX) {
command_error(client, ACK_ERROR_ARG,
"Number too large: %s", s);
return false;
}
#endif
*value_r1 = (int)value;
if (*test == ':') {
value = strtol(++test, &test2, 10);
if (*test2 != '\0' || test == test2) {
va_list args;
va_start(args, fmt);
command_error_v(client, ACK_ERROR_ARG, fmt, args);
va_end(args);
return false;
}
#if LONG_MAX > INT_MAX
if (value < INT_MIN || value > INT_MAX) {
command_error(client, ACK_ERROR_ARG,
"Number too large: %s", s);
return false;
}
#endif
*value_r2 = (int)value;
}
return true;
}
static bool
check_unsigned(struct client *client, unsigned *value_r, const char *s)
{