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#include <stdlib.h>
#include <string.h>
#include <endian.h>
#include "ser.h"
void ser_bytes(strbuf *w, size_t len, uint8_t *x)
{
while (w->buf.len + len > w->cap)
w->buf.data = realloc(w->buf.data, w->cap = w->cap ? w->cap * 2 : 1);
memcpy(w->buf.data, x, len);
w->buf.len += len;
}
void ser_str(strbuf *w, str x)
{
ser_u16(w, x.len);
ser_bytes(w, x.len, (uint8_t *) x.data);
}
void ser_u8(strbuf *w, uint8_t x)
{
ser_bytes(w, 1, &x);
}
void ser_u16(strbuf *w, uint16_t x)
{
x = htole16(x);
ser_bytes(w, 2, (uint8_t *) &x);
}
void ser_u32(strbuf *w, uint32_t x)
{
x = htole32(x);
ser_bytes(w, 4, (uint8_t *) &x);
}
void ser_u64(strbuf *w, uint64_t x)
{
x = htole64(x);
ser_bytes(w, 8, (uint8_t *) &x);
}
#define SER_SIGN(N) void ser_i##N(strbuf *w, int##N##_t x) { ser_u##N(w, x); };
SER_SIGN(16)
SER_SIGN(32)
SER_SIGN(64)
#undef SER_SIGN
bool deser_bytes(str *r, size_t len, uint8_t *buf)
{
if (len > r->len)
return false;
memcpy(buf, r->data, len);
*r = str_advance(*r, len);
return true;
}
bool deser_str(str *r, str *buf)
{
uint16_t len;
if (!deser_u16(r, &len))
return false;
if (len > r->len)
return false;
*buf = (str) { len, r->data };
*r = str_advance(*r, len);
return true;
}
bool deser_u8(str *r, uint8_t *buf)
{
return deser_bytes(r, 1, buf);
}
bool deser_u16(str *r, uint16_t *buf)
{
if (!deser_bytes(r, 2, (uint8_t *) buf))
return false;
*buf = le16toh(*buf);
return true;
}
bool deser_u32(str *r, uint32_t *buf)
{
if (!deser_bytes(r, 4, (uint8_t *) buf))
return false;
*buf = le32toh(*buf);
return true;
}
bool deser_u64(str *r, uint64_t *buf)
{
if (!deser_bytes(r, 8, (uint8_t *) buf))
return false;
*buf = le64toh(*buf);
return true;
}
#define DESER_SIGN(N) \
bool deser_i##N(str *r, int##N##_t *buf) \
{ \
uint##N##_t x; \
if (!deser_u##N(r, &x)) \
return false; \
*buf = x; \
return true; \
}
DESER_SIGN(8)
DESER_SIGN(16)
DESER_SIGN(32)
DESER_SIGN(64)
#undef DESER_SIGN
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