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#include <errno.h>
#include "sys_net.h"
#include "allocate.h"
#include "marshal.h"
#define dprintf(fmt, args...) IOStream_print(iostdout, "[DEBUG] %s" fmt, __FUNCTION__, ##args)
#define wprintf(fmt, args...) IOStream_print(iostderr, "[WARN] %s" fmt, __FUNCTION__, ##args)
#define iprintf(fmt, args...) IOStream_print(iostdout, "[INFO] %s" fmt, __FUNCTION__, ##args)
#define eprintf(fmt, args...) IOStream_print(iostderr, "[ERROR] %s" fmt, __FUNCTION__, ##args)
#define ARRAY_SIZE(ary) (sizeof(ary)/sizeof((ary)[0]))
/* Messages are coded as msgid followed by message fields.
* Initial message on any channel is hello - so can check version
* compatibility.
*
* char* -> uint16_t:n <n bytes>
* ints/uints go as suitable number of bytes (e.g. uint16_t is 2 bytes).
* optional fields go as '1' <val> or '0' (the 0/1 is 1 byte).
* lists go as ('1' <elt>)* '0'
*/
int marshal_flush(IOStream *io){
int err = 0;
err = IOStream_flush(io);
return err;
}
int marshal_bytes(IOStream *io, void *s, uint32_t s_n){
int err = 0;
int n;
n = IOStream_write(io, s, s_n);
if(n < 0){
err = n;
} else if (n < s_n){
wprintf("> Wanted %d, got %d\n", s_n, n);
err = -EIO;
}
return err;
}
int unmarshal_bytes(IOStream *io, void *s, uint32_t s_n){
int err = 0;
int n;
//dprintf("> s_n=%d\n", s_n);
n = IOStream_read(io, s, s_n);
//dprintf("> n=%d\n", n);
if(n < 0){
err = n;
} else if(n < s_n){
wprintf("> Wanted %d, got %d\n", s_n, n);
err = -EIO;
}
//dprintf("< err=%d\n", err);
return err;
}
int marshal_uint8(IOStream *io, uint8_t x){
return marshal_bytes(io, &x, sizeof(x));
}
int unmarshal_uint8(IOStream *io, uint8_t *x){
return unmarshal_bytes(io, x, sizeof(*x));
}
int marshal_uint16(IOStream *io, uint16_t x){
x = htons(x);
return marshal_bytes(io, &x, sizeof(x));
}
int unmarshal_uint16(IOStream *io, uint16_t *x){
int err = 0;
err = unmarshal_bytes(io, x, sizeof(*x));
*x = ntohs(*x);
return err;
}
int marshal_int32(IOStream *io, int32_t x){
int err = 0;
//dprintf("> x=%d\n", x);
x = htonl(x);
err = marshal_bytes(io, &x, sizeof(x));
//dprintf("< err=%d\n", err);
return err;
}
int unmarshal_int32(IOStream *io, int32_t *x){
int err = 0;
//dprintf(">\n");
err = unmarshal_bytes(io, x, sizeof(*x));
*x = ntohl(*x);
//dprintf("< err=%d x=%d\n", err, *x);
return err;
}
int marshal_uint32(IOStream *io, uint32_t x){
int err = 0;
//dprintf("> x=%u\n", x);
x = htonl(x);
err = marshal_bytes(io, &x, sizeof(x));
//dprintf("< err=%d\n", err);
return err;
}
int unmarshal_uint32(IOStream *io, uint32_t *x){
int err = 0;
//dprintf(">\n");
err = unmarshal_bytes(io, x, sizeof(*x));
*x = ntohl(*x);
//dprintf("< err=%d x=%u\n", err, *x);
return err;
}
int marshal_uint64(IOStream *io, uint64_t x){
int err;
err = marshal_uint32(io, (uint32_t) ((x >> 32) & 0xffffffff));
if(err) goto exit;
err = marshal_uint32(io, (uint32_t) ( x & 0xffffffff));
exit:
return err;
}
int unmarshal_uint64(IOStream *io, uint64_t *x){
int err = 0;
uint32_t hi, lo;
err = unmarshal_uint32(io, &hi);
if(err) goto exit;
err = unmarshal_uint32(io, &lo);
*x = (((uint64_t) hi) << 32) | lo;
exit:
return err;
}
int marshal_net16(IOStream *io, net16_t x){
return marshal_bytes(io, &x, sizeof(x));
}
int unmarshal_net16(IOStream *io, net16_t *x){
int err = 0;
err = unmarshal_bytes(io, x, sizeof(*x));
return err;
}
int marshal_net32(IOStream *io, net32_t x){
return marshal_bytes(io, &x, sizeof(x));
}
int unmarshal_net32(IOStream *io, net32_t *x){
int err = 0;
err = unmarshal_bytes(io, x, sizeof(*x));
return err;
}
int marshal_string(IOStream *io, char *s, uint32_t s_n){
int err;
//dprintf("> s=%s\n", s);
err = marshal_uint32(io, s_n);
if(err) goto exit;
err = marshal_bytes(io, s, s_n);
exit:
//dprintf("< err=%d\n", err);
return err;
}
int unmarshal_string(IOStream *io, char *s, uint32_t s_n){
int err = 0, val_n = 0;
//dprintf(">\n");
err = unmarshal_uint32(io, &val_n);
if(err) goto exit;
if(val_n >= s_n){
err = -EINVAL;
goto exit;
}
err = unmarshal_bytes(io, s, val_n);
if(err) goto exit;
s[val_n] = '\0';
exit:
//dprintf("< err=%d s=%s\n", err, s);
return err;
}
int unmarshal_new_string(IOStream *io, char **s, uint32_t *s_n){
int err = 0, val_n = 0;
char *val = NULL;
//dprintf(">\n");
err = unmarshal_uint32(io, &val_n);
if(err) goto exit;
val = allocate(val_n + 1);
if(!val){
err = -ENOMEM;
goto exit;
}
err = unmarshal_bytes(io, val, val_n);
if(err) goto exit;
val[val_n] = '\0';
exit:
if(err){
if(val) deallocate(val);
val = NULL;
val_n = 0;
}
*s = val;
if(s_n) *s_n = val_n;
//dprintf("< err=%d s=%s\n", err, *s);
return err;
}
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