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#include "git-compat-util.h"
#include "gettext.h"
#include "parse.h"
static uintmax_t get_unit_factor(const char *end)
{
if (!*end)
return 1;
else if (!strcasecmp(end, "k"))
return 1024;
else if (!strcasecmp(end, "m"))
return 1024 * 1024;
else if (!strcasecmp(end, "g"))
return 1024 * 1024 * 1024;
return 0;
}
int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
{
if (value && *value) {
char *end;
intmax_t val;
intmax_t factor;
if (max < 0)
BUG("max must be a positive integer");
errno = 0;
val = strtoimax(value, &end, 0);
if (errno == ERANGE)
return 0;
if (end == value) {
errno = EINVAL;
return 0;
}
factor = get_unit_factor(end);
if (!factor) {
errno = EINVAL;
return 0;
}
if ((val < 0 && -max / factor > val) ||
(val > 0 && max / factor < val)) {
errno = ERANGE;
return 0;
}
val *= factor;
*ret = val;
return 1;
}
errno = EINVAL;
return 0;
}
static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
{
if (value && *value) {
char *end;
uintmax_t val;
uintmax_t factor;
/* negative values would be accepted by strtoumax */
if (strchr(value, '-')) {
errno = EINVAL;
return 0;
}
errno = 0;
val = strtoumax(value, &end, 0);
if (errno == ERANGE)
return 0;
if (end == value) {
errno = EINVAL;
return 0;
}
factor = get_unit_factor(end);
if (!factor) {
errno = EINVAL;
return 0;
}
if (unsigned_mult_overflows(factor, val) ||
factor * val > max) {
errno = ERANGE;
return 0;
}
val *= factor;
*ret = val;
return 1;
}
errno = EINVAL;
return 0;
}
int git_parse_int(const char *value, int *ret)
{
intmax_t tmp;
if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
return 0;
*ret = tmp;
return 1;
}
int git_parse_int64(const char *value, int64_t *ret)
{
intmax_t tmp;
if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
return 0;
*ret = tmp;
return 1;
}
int git_parse_ulong(const char *value, unsigned long *ret)
{
uintmax_t tmp;
if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
return 0;
*ret = tmp;
return 1;
}
int git_parse_ssize_t(const char *value, ssize_t *ret)
{
intmax_t tmp;
if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
return 0;
*ret = tmp;
return 1;
}
int git_parse_maybe_bool_text(const char *value)
{
if (!value)
return 1;
if (!*value)
return 0;
if (!strcasecmp(value, "true")
|| !strcasecmp(value, "yes")
|| !strcasecmp(value, "on"))
return 1;
if (!strcasecmp(value, "false")
|| !strcasecmp(value, "no")
|| !strcasecmp(value, "off"))
return 0;
return -1;
}
int git_parse_maybe_bool(const char *value)
{
int v = git_parse_maybe_bool_text(value);
if (0 <= v)
return v;
if (git_parse_int(value, &v))
return !!v;
return -1;
}
/*
* Parse environment variable 'k' as a boolean (in various
* possible spellings); if missing, use the default value 'def'.
*/
int git_env_bool(const char *k, int def)
{
const char *v = getenv(k);
int val;
if (!v)
return def;
val = git_parse_maybe_bool(v);
if (val < 0)
die(_("bad boolean environment value '%s' for '%s'"),
v, k);
return val;
}
/*
* Parse environment variable 'k' as ulong with possibly a unit
* suffix; if missing, use the default value 'val'.
*/
unsigned long git_env_ulong(const char *k, unsigned long val)
{
const char *v = getenv(k);
if (v && !git_parse_ulong(v, &val))
die(_("failed to parse %s"), k);
return val;
}
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