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86 lines
1.8 KiB
C

#pragma once
#include "md.h"
typedef struct
{
MD_b8 failed;
MD_String8 why;
} SerError;
typedef struct
{
MD_u8 *data; // set to 0 to dry run and get maximum size. max doesn't matter in this case
MD_u64 cur;
MD_u64 max;
MD_Arena *arena; // allocate everything new on this, so that if serialization fails allocations can be undone
// Serializing should never allocate. So this can be null when you serialize
int version;
SerError cur_error;
MD_Arena *error_arena; // all error messages are allocated here
MD_b8 serializing;
} SerState;
void ser_bytes(SerState *ser, MD_u8 *bytes, MD_u64 bytes_size)
{
if(!ser->data && !ser->serializing)
{
ser->cur_error = (SerError){.failed = true, .why = MD_S8Lit("Deserializing but the data is null")};
}
if(!ser->cur_error.failed)
{
if(ser->data)
{
// maximum doesn't matter unless writing to data
if(ser->cur + bytes_size > ser->max)
{
ser->cur_error = (SerError){.failed = true, .why = MD_S8Lit("Too big bro")};
}
else
{
if(ser->serializing)
{
memcpy(ser->data + ser->cur, bytes, bytes_size);
}
else
{
memcpy(bytes, ser->data + ser->cur, bytes_size);
}
}
}
ser->cur += bytes_size;
}
}
#define SER_MAKE_FOR_TYPE(type) void ser_##type(SerState *ser, type *into) \
{ \
ser_bytes(ser, (MD_u8*)into, sizeof(*into)); \
}
SER_MAKE_FOR_TYPE(int);
SER_MAKE_FOR_TYPE(MD_u64);
// Embeds the string into the serialized binary. When deserializing copies the
// deserialized data onto a newly allocated buffer
void ser_MD_String8(SerState *ser, MD_String8 *s, MD_Arena *allocate_onto)
{
ser_MD_u64(ser, &s->size);
if(ser->serializing)
{
ser_bytes(ser, s->str, s->size);
}
else
{
s->str = MD_ArenaPush(allocate_onto, s->size);
ser_bytes(ser, s->str, s->size);
}
}