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/* CC0 license (public domain) - see LICENSE file for details */
#include "pull.h"
#include <ccan/endian/endian.h>
#include <string.h>
bool pull_bytes(const char **p, size_t *max_len, void *dst, size_t len)
{
if (*max_len < len) {
*p = NULL;
*max_len = 0;
return false;
}
if (dst)
memcpy(dst, *p, len);
*max_len -= len;
*p += len;
return true;
}
bool pull_u64(const char **p, size_t *max_len, uint64_t *val)
{
leint64_t v;
if (pull_bytes(p, max_len, &v, sizeof(v))) {
if (val)
*val = le64_to_cpu(v);
return true;
}
return false;
}
bool pull_u32(const char **p, size_t *max_len, uint32_t *val)
{
leint32_t v;
if (pull_bytes(p, max_len, &v, sizeof(v))) {
if (val)
*val = le32_to_cpu(v);
return true;
}
return false;
}
bool pull_u16(const char **p, size_t *max_len, uint16_t *val)
{
leint16_t v;
if (pull_bytes(p, max_len, &v, sizeof(v))) {
if (val)
*val = le16_to_cpu(v);
return true;
}
return false;
}
bool pull_u8(const char **p, size_t *max_len, uint8_t *val)
{
return pull_bytes(p, max_len, val, sizeof(*val));
}
bool pull_s64(const char **p, size_t *max_len, int64_t *val)
{
leint64_t v;
if (pull_bytes(p, max_len, &v, sizeof(v))) {
if (val)
*val = le64_to_cpu(v);
return true;
}
return false;
}
bool pull_s32(const char **p, size_t *max_len, int32_t *val)
{
leint32_t v;
if (pull_bytes(p, max_len, &v, sizeof(v))) {
if (val)
*val = le32_to_cpu(v);
return true;
}
return false;
}
bool pull_s16(const char **p, size_t *max_len, int16_t *val)
{
leint16_t v;
if (pull_bytes(p, max_len, &v, sizeof(v))) {
if (val)
*val = le16_to_cpu(v);
return true;
}
return false;
}
bool pull_s8(const char **p, size_t *max_len, int8_t *val)
{
return pull_bytes(p, max_len, val, sizeof(*val));
}
bool pull_char(const char **p, size_t *max_len, char *val)
{
return pull_bytes(p, max_len, val, sizeof(*val));
}
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