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/*
* netstring.c:
* Write netstrings to strings.
*
* Copyright (c) 2006 UK Citizens Online Democracy. All rights reserved.
* Email: chris@mysociety.org; WWW: http://www.mysociety.org/
*
*/
static const char rcsid[] = "$Id: netstring.c,v 1.2 2006-09-20 13:24:08 chris Exp $";
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
/* netstring_write OUT BUFFER LEN
* Write the LEN-byte BUFFER to OUT as a netstring, returning the number of
* bytes. If OUT is NULL, returns the number of bytes required. */
size_t netstring_write(char *out, const void *buf, const size_t len) {
size_t l = 0;
char dummy[32];
l += sprintf(out ? out : dummy, "%u:", (unsigned)len);
if (out) memcpy(out + l, buf, len);
l += len;
if (out) out[l] = ',';
++l;
return l;
}
/* netstring_write_string OUT STRING
* Write the NUL-terminated STRING to OUT as a netstring, returning the number
* of bytes used. If OUT is NULL, return the number of bytes required. */
size_t netstring_write_string(char *out, const char *str) {
return netstring_write(out, str, strlen(str));
}
/* netstring_write_string OUT I
* Write I to OUT as a decimal integer formatted as a netstring, returning the
* number of bytes used. If OUT is NULL, return the number of bytes required. */
size_t netstring_write_int(char *out, const int i) {
char str[32];
sprintf(str, "%d", i);
return netstring_write_string(out, str);
}
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