richterm

commit 27bfa1b56b9959562be1cb7463833a8023d5d047
parent a169bc9ed6aad8ecf8e6ce1e89b2924f5c46b072
Author: glenda <glenda@9front.local>
Date:   Thu, 12 Aug 2021 16:48:55 +0000

do commit array source files

Diffstat:
A
array.c
 | 
47
+++++++++++++++++++++++++++++++++++++++++++++++
A
array.h
 | 
14
++++++++++++++

2 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/array.c b/array.c
@@ -0,0 +1,47 @@
+#include <u.h>
+#include <libc.h>
+
+#include "array.h"
+
+Array * 
+arraycreate(usize size, long n, void (*free)(void *))
+{
+	Array *ap;
+	ap = mallocz(sizeof(Array), 1);
+	ap->size = size;
+	ap->count = 0;
+	ap->n = n;
+	ap->mem = mallocz(size * n, 1);
+	ap->free = free;
+	return ap;
+}
+
+void 
+arrayfree(Array *ap)
+{
+	int i;
+	if (ap->free != nil) {
+		for (i = 0; i < ap->count; i ++) {
+			void *v;
+			v = arrayget(ap, i);
+			ap->free(v);
+		}
+	}
+	free(ap);
+	/* stub */
+}
+
+void * 
+arrayadd(Array *ap)
+{
+	ap->count++;
+	if (ap->count > ap->n) ap->n += ap->n;
+	ap->mem = realloc(ap->mem, ap->size * ap->n);
+	return memset(arrayget(ap, ap->count - 1), 0, ap->size);
+}
+
+void * 
+arrayget(Array *ap, long n)
+{
+	return (void *)(ap->mem + ap->size * n);
+}
diff --git a/array.h b/array.h
@@ -0,0 +1,14 @@
+typedef struct Array Array;
+
+struct Array {
+	usize size;
+	usize n;
+	long count;
+	char *mem;
+	void (*free)(void *);
+};
+
+Array * arraycreate(usize, long, void (*free)(void *));
+void arrayfree(Array *);
+void * arrayadd(Array *);
+void * arrayget(Array *, long);