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command: added check_unsigned() / check_bool()

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Many command arguments must not be negative; add a separate
parser/checker function for that.  For the same reason, add
check_bool().  This eliminates two strange special cases handlers from
check_int().
This commit is contained in:
Max Kellermann 2008-10-23 09:53:35 +02:00
parent 3958457256
commit 95ae1d9e9e
1 changed files with 57 additions and 13 deletions
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70
src/command.c
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@ -79,8 +79,6 @@ static const char need_positive[] = "need a positive integer"; /* no-op */
/* FIXME: redundant error messages */
static const char check_integer[] = "\"%s\" is not a integer";
static const char need_integer[] = "need an integer";
static const char check_boolean[] = "\"%s\" is not 0 or 1";
static const char check_non_negative[] = "\"%s\" is not an integer >= 0";
static const char *current_command;
static int command_list_num;
@ -137,9 +135,7 @@ check_int(struct client *client, int *dst,
char *test;
*dst = strtol(s, &test, 10);
if (*test != '\0' ||
(fmt == check_boolean && *dst != 0 && *dst != 1) ||
(fmt == check_non_negative && *dst < 0)) {
if (*test != '\0') {
va_list args;
va_start(args, fmt);
command_error_v(client, ACK_ERROR_ARG, fmt, args);
@ -149,6 +145,52 @@ check_int(struct client *client, int *dst,
return true;
}
static bool
check_unsigned(struct client *client, unsigned *value_r, const char *s)
{
unsigned long value;
char *endptr;
value = strtoul(s, &endptr, 10);
if (*endptr != 0) {
command_error(client, ACK_ERROR_ARG,
"Integer expected: %s", s);
return false;
}
if (value > UINT_MAX) {
command_error(client, ACK_ERROR_ARG,
"Number too large: %s", s);
return false;
}
*value_r = (unsigned)value;
return true;
}
static bool
check_bool(struct client *client, bool *value_r, const char *s)
{
long value;
char *endptr;
value = strtol(s, &endptr, 10);
if (*endptr != 0 || value != 0 || value != 1) {
command_error(client, ACK_ERROR_ARG,
"Boolean (0/1) expected: %s", s);
return false;
}
if (value > UINT_MAX) {
command_error(client, ACK_ERROR_ARG,
"Number too large: %s", s);
return false;
}
*value_r = !!value;
return true;
}
static enum command_return
print_playlist_result(struct client *client,
enum playlist_result result)
@ -291,8 +333,8 @@ handle_pause(struct client *client,
int argc, char *argv[])
{
if (argc == 2) {
int pause_flag;
if (!check_int(client, &pause_flag, argv[1], check_boolean, argv[1]))
bool pause_flag;
if (!check_bool(client, &pause_flag, argv[1]))
return COMMAND_RETURN_ERROR;
playerSetPause(pause_flag);
return COMMAND_RETURN_OK;
@ -1098,9 +1140,9 @@ handle_password(struct client *client, mpd_unused int argc, char *argv[])
static enum command_return
handle_crossfade(struct client *client, mpd_unused int argc, char *argv[])
{
int xfade_time;
unsigned xfade_time;
if (!check_int(client, &xfade_time, argv[1], check_non_negative, argv[1]))
if (!check_unsigned(client, &xfade_time, argv[1]))
return COMMAND_RETURN_ERROR;
setPlayerCrossFade(xfade_time);
@ -1110,9 +1152,10 @@ handle_crossfade(struct client *client, mpd_unused int argc, char *argv[])
static enum command_return
handle_enableoutput(struct client *client, mpd_unused int argc, char *argv[])
{
int device, ret;
unsigned device;
int ret;
if (!check_int(client, &device, argv[1], check_non_negative, argv[1]))
if (!check_unsigned(client, &device, argv[1]))
return COMMAND_RETURN_ERROR;
ret = enableAudioDevice(device);
@ -1126,9 +1169,10 @@ handle_enableoutput(struct client *client, mpd_unused int argc, char *argv[])
static enum command_return
handle_disableoutput(struct client *client, mpd_unused int argc, char *argv[])
{
int device, ret;
unsigned device;
int ret;
if (!check_int(client, &device, argv[1], check_non_negative, argv[1]))
if (!check_unsigned(client, &device, argv[1]))
return COMMAND_RETURN_ERROR;
ret = disableAudioDevice(device);