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Add ltrimstr and rtrimstr functions

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This commit is contained in:
Nicolas Williams
2013-11-30 00:44:14 -06:00
parent fa316ac430
commit 346da34432
1 changed files with 29 additions and 0 deletions
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29
builtin.c
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@@ -108,6 +108,33 @@ static jv f_endswith(jv a, jv b) {
return ret;
}
static jv f_ltrimstr(jv input, jv left) {
if (jv_get_kind(f_startswith(jv_copy(input), jv_copy(left))) != JV_KIND_TRUE) {
jv_free(left);
return input;
}
/*
* FIXME It'd be better to share the suffix with the original input --
* that we could do, we just can't share prefixes.
*/
int prefixlen = jv_string_length_bytes(left);
jv res = jv_string_sized(jv_string_value(input) + prefixlen,
jv_string_length_bytes(jv_copy(input)) - prefixlen);
jv_free(input);
return res;
}
static jv f_rtrimstr(jv input, jv right) {
if (jv_get_kind(f_endswith(jv_copy(input), jv_copy(right))) == JV_KIND_TRUE) {
jv res = jv_string_sized(jv_string_value(input),
jv_string_length_bytes(jv_copy(input)) - jv_string_length_bytes(right));
jv_free(input);
return res;
}
jv_free(right);
return input;
}
static jv f_minus(jv input, jv a, jv b) {
jv_free(input);
if (jv_get_kind(a) == JV_KIND_NUMBER && jv_get_kind(b) == JV_KIND_NUMBER) {
@@ -556,6 +583,8 @@ static const struct cfunction function_list[] = {
{(cfunction_ptr)f_keys, "keys", 1},
{(cfunction_ptr)f_startswith, "startswith", 2},
{(cfunction_ptr)f_endswith, "endswith", 2},
{(cfunction_ptr)f_ltrimstr, "ltrimstr", 2},
{(cfunction_ptr)f_rtrimstr, "rtrimstr", 2},
{(cfunction_ptr)jv_string_split, "split", 2},
{(cfunction_ptr)jv_string_explode, "explode", 1},
{(cfunction_ptr)jv_string_implode, "implode", 1},