void marshal_skshash(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
const struct skshash *hash)
{
uint32_t len;
len = htonl(sizeof(hash->hash));
putchar_func(ctx, sizeof(len), &len);
putchar_func(ctx, sizeof(hash->hash), (void *) hash->hash);
}
void marshal_string(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
const char *string)
{
uint32_t len, nlen;
len = strlen(string);
nlen = htonl(len);
putchar_func(ctx, sizeof(nlen), &nlen);
putchar_func(ctx, len, &string);
}
/*
* use putchar_func to print a string
* @putchar_func is a function pointer to print a character
* @format is the control format string (e.g. "%d + %d = %d")
* @data is the address of the first variable argument
* please implement it.
*/
int
vfprintf(void (*putchar_func)(char), const char *format, void **data) {
int cnt=0; //number of the printed char
char ch;
char *pbuf;
while(1){
while((ch=*format++)!='%'){
if(ch=='\0'){
return cnt;
}
putchar_func(ch);
cnt++;
}
switch ((ch=*format++)){
case 'c':
putchar_func(*(char *)data++); //Notice data=data+1, data proceeds 4 bytes,
cnt++; //beacause of 4 bytes of alignment.
break;
case 'd':
pbuf=itoa(*(int *)data++,10);
while((ch=*pbuf++)!=0){
putchar_func(ch);
cnt++;
}
break;
case 'x':
pbuf=utoa(*(unsigned int *)data++,16);
while((ch=*pbuf++)!=0){
putchar_func(ch);
cnt++;
}
break;
case 's':
pbuf=*(char **)data++;
while((ch=*pbuf++)!=0){
putchar_func(ch);
cnt++;
}
break;
default :
// If this foramt specifier is invalid, print it out
// with '%' as const string. Specifically, if it's '\0' which
// ends the whole format string, the pointer format needs to
// go back, thus, we can return to the while loop safely, or unexpected
// behavior happens
putchar_func('%');
cnt++;
if(ch!='\0'){
putchar_func(ch);
cnt++;
}
else format--;
}
}
}
void marshal_publickey(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
const struct openpgp_publickey *key)
{
uint32_t len;
struct openpgp_packet_list *packets = NULL, *list_end = NULL;
struct buffer_ctx buf;
buf.buffer = calloc(1, 1024);
buf.size = 1024;
buf.offset = 0;
flatten_publickey((struct openpgp_publickey *) key, &packets,
&list_end);
write_openpgp_stream(buffer_putchar, &buf, packets);
len = htonl(buf.offset);
putchar_func(ctx, sizeof(len), &len);
putchar_func(ctx, buf.offset, buf.buffer);
free_packet_list(packets);
}
void marshal_array(int (*putchar_func)(void *ctx, size_t count,
void *c),
void *ctx,
void (*marshal_func)(int
(*putchar_func)(void *ctx,
size_t count, void *c),
void *ctx, const void *item),
void **array,
int size)
{
uint32_t len;
int i;
len = htonl(size);
putchar_func(ctx, sizeof(len), &len);
for (i = 0; i < size; i++) {
marshal_func(putchar_func, ctx, array[i]);
}
}