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Add string slicing

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Nicolas Williams committed 2013-12-04 18:21:39 -06:00
1 parent 5aadaa79eb
commit 884e6c7d8b
3 files changed
+72 -2
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jv_aux.c
+14 -2
View File
@@ -3,15 +3,19 @@
#include <assert.h>
#include "jv_alloc.h"
static int parse_slice(jv array, jv slice, int* pstart, int* pend) {
static int parse_slice(jv j, jv slice, int* pstart, int* pend) {
// Array slices
int len = jv_array_length(jv_copy(array));
jv start_jv = jv_object_get(jv_copy(slice), jv_string("start"));
jv end_jv = jv_object_get(slice, jv_string("end"));
if (jv_get_kind(start_jv) == JV_KIND_NULL) {
jv_free(start_jv);
start_jv = jv_number(0);
}
int len;
if (jv_get_kind(j) == JV_KIND_ARRAY)
len = jv_array_length(jv_copy(j));
else
len = jv_string_length_codepoints(jv_copy(j));
if (jv_get_kind(end_jv) == JV_KIND_NULL) {
jv_free(end_jv);
end_jv = jv_number(len);
@@ -61,6 +65,14 @@ jv jv_get(jv t, jv k) {
v = jv_invalid_with_msg(jv_string_fmt("Start and end indices of an array slice must be numbers"));
jv_free(t);
}
} else if (jv_get_kind(t) == JV_KIND_STRING && jv_get_kind(k) == JV_KIND_OBJECT) {
int start, end;
if (parse_slice(t, k, &start, &end)) {
v = jv_string_slice(t, start, end);
} else {
v = jv_invalid_with_msg(jv_string_fmt("Start and end indices of an string slice must be numbers"));
jv_free(t);
}
} else if (jv_get_kind(t) == JV_KIND_NULL &&
(jv_get_kind(k) == JV_KIND_STRING ||
jv_get_kind(k) == JV_KIND_NUMBER ||