pushpull: new module.

[ccan] / ccan / pushpull / push.c

diff --git a/ccan/pushpull/push.c b/ccan/pushpull/push.c
new file mode 100644 (file)
index 0000000..c7c2250
--- /dev/null
+++ b/ccan/pushpull/push.c
@@ -0,0 +1,73 @@
+/* CC0 license (public domain) - see LICENSE file for details */
+#include "push.h"
+#include <ccan/endian/endian.h>
+#include <string.h>
+
+static void *(*push_reallocfn)(void *ptr, size_t size) = realloc;
+
+bool push_bytes(char **p, size_t *len, const void *src, size_t srclen)
+{
+       char *n = push_reallocfn(*p, *len + srclen);
+       if (!n)
+               return false;
+       *p = n;
+       if (src)
+               memcpy(*p + *len, src, srclen);
+       else
+               memset(*p + *len, 0, srclen);
+       *len += srclen;
+       return true;
+}
+
+bool push_u64(char **p, size_t *len, uint64_t val)
+{
+       leint64_t v = cpu_to_le64(val);
+       return push_bytes(p, len, &v, sizeof(v));
+}
+
+bool push_u32(char **p, size_t *len, uint32_t val)
+{
+       leint32_t v = cpu_to_le32(val);
+       return push_bytes(p, len, &v, sizeof(v));
+}
+
+bool push_u16(char **p, size_t *len, uint16_t val)
+{
+       leint16_t v = cpu_to_le16(val);
+       return push_bytes(p, len, &v, sizeof(v));
+}
+
+bool push_u8(char **p, size_t *len, uint8_t val)
+{
+       return push_bytes(p, len, &val, sizeof(val));
+}
+
+bool push_s64(char **p, size_t *len, int64_t val)
+{
+       return push_u64(p, len, val);
+}
+
+bool push_s32(char **p, size_t *len, int32_t val)
+{
+       return push_u32(p, len, val);
+}
+
+bool push_s16(char **p, size_t *len, int16_t val)
+{
+       return push_u16(p, len, val);
+}
+
+bool push_s8(char **p, size_t *len, int8_t val)
+{
+       return push_u8(p, len, val);
+}
+
+bool push_char(char **p, size_t *len, char val)
+{
+       return push_u8(p, len, val);
+}
+
+void push_set_realloc(void *(*reallocfn)(void *ptr, size_t size))
+{
+       push_reallocfn = reallocfn;
+}