Viewing file:  circarray.c (1.25 KB) -rw-rw-r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* circarray.c
* Copyright (c) 2012, Peter Ohler
* All rights reserved.
*/
#include "circarray.h"
CircArray
oj_circ_array_new() {
CircArray ca;
if (0 == (ca = ALLOC(struct _circArray))) {
rb_raise(rb_eNoMemError, "not enough memory\n");
}
ca->objs = ca->obj_array;
ca->size = sizeof(ca->obj_array) / sizeof(VALUE);
ca->cnt = 0;
return ca;
}
void
oj_circ_array_free(CircArray ca) {
if (ca->objs != ca->obj_array) {
xfree(ca->objs);
}
xfree(ca);
}
void
oj_circ_array_set(CircArray ca, VALUE obj, unsigned long id) {
if (0 < id && 0 != ca) {
unsigned long i;
if (ca->size < id) {
unsigned long cnt = id + 512;
if (ca->objs == ca->obj_array) {
if (0 == (ca->objs = ALLOC_N(VALUE, cnt))) {
rb_raise(rb_eNoMemError, "not enough memory\n");
}
memcpy(ca->objs, ca->obj_array, sizeof(VALUE) * ca->cnt);
} else {
REALLOC_N(ca->objs, VALUE, cnt);
}
ca->size = cnt;
}
id--;
for (i = ca->cnt; i < id; i++) {
ca->objs[i] = Qnil;
}
ca->objs[id] = obj;
if (ca->cnt <= id) {
ca->cnt = id + 1;
}
}
}
VALUE
oj_circ_array_get(CircArray ca, unsigned long id) {
VALUE obj = Qnil;
if (id <= ca->cnt && 0 != ca) {
obj = ca->objs[id - 1];
}
return obj;
}
|