/* Extra room for the ending NUL-byte, necessary even when the buffer has
* SOL_BUFFER_FLAGS_NO_NUL_BYTE because vsnprintf always write the '\0'. */
SOL_API int
sol_buffer_append_vprintf(struct sol_buffer *buf, const char *fmt, va_list args)
{
va_list args_copy;
size_t space;
char *p;
ssize_t done;
int r;
SOL_NULL_CHECK(buf, -EINVAL);
SOL_NULL_CHECK(fmt, -EINVAL);
/* We need to copy args since we first try to do one vsnprintf()
* to the existing space and if it doesn't fit we do a second
* one. The second one would fail since args may be changed by
* vsnprintf(), so the copy.
*/
va_copy(args_copy, args);
space = buf->capacity - buf->used;
p = sol_buffer_at_end(buf);
done = vsnprintf(p, space, fmt, args_copy);
if (done < 0) {
r = -errno;
goto end;
} else if ((size_t)done >= space) {
size_t new_size;
r = sol_util_size_add(buf->used, done, &new_size);
if (r < 0)
goto end;
/* Extra room for the ending NUL-byte. */
if (new_size >= SIZE_MAX - 1) {
r = -EOVERFLOW;
goto end;
}
r = sol_buffer_ensure(buf, new_size + 1);
if (r < 0)
goto end;
space = buf->capacity - buf->used;
p = sol_buffer_at_end(buf);
done = vsnprintf(p, space, fmt, args);
if (done < 0) {
r = -errno;
goto end;
}
}
buf->used += done;
r = 0;
end:
va_end(args_copy);
return r;
}
SOL_API int
sol_buffer_append_char(struct sol_buffer *buf, const char c)
{
char *p;
size_t new_size;
int err;
SOL_NULL_CHECK(buf, -EINVAL);
err = sol_util_size_add(buf->used, 1, &new_size);
if (err < 0)
return err;
err = sol_buffer_ensure(buf, new_size);
if (err < 0)
return err;
p = sol_buffer_at_end(buf);
*p = c;
buf->used++;
if (nul_byte_size(buf))
return sol_buffer_ensure_nul_byte(buf);
return 0;
}
SOL_API int
sol_buffer_append_slice(struct sol_buffer *buf, const struct sol_str_slice slice)
{
const size_t nul_size = nul_byte_size(buf);
char *p;
size_t new_size;
int err;
SOL_NULL_CHECK(buf, -EINVAL);
err = sol_util_size_add(buf->used, slice.len, &new_size);
if (err < 0)
return err;
/* Extra room for the ending NUL-byte. */
if (new_size >= SIZE_MAX - nul_size)
return -EOVERFLOW;
err = sol_buffer_ensure(buf, new_size + nul_size);
if (err < 0)
return err;
p = sol_buffer_at_end(buf);
memcpy(p, slice.data, slice.len);
if (nul_size)
p[slice.len] = '\0';
buf->used += slice.len;
return 0;
}
SOL_API const char *
sol_network_link_addr_to_str(const struct sol_network_link_addr *addr,
struct sol_buffer *buf)
{
char *p;
int i;
bool sep = false, skipping = false, treated_zeroes = false;
SOL_NULL_CHECK(addr, NULL);
SOL_NULL_CHECK(buf, NULL);
if (sol_bluetooth_is_family(addr->family))
return sol_bluetooth_addr_to_str(addr, buf);
if (addr->family != SOL_NETWORK_FAMILY_INET6)
return NULL;
if (buf->capacity - buf->used < SOL_NETWORK_INET_ADDR_STR_LEN)
return NULL;
p = sol_buffer_at_end(buf);
for (i = 0; i < 16; i += 2) {
uint16_t part;
part = ((uint16_t)addr->addr.in6[i] << 8) | addr->addr.in6[i + 1];
if (part && skipping) {
skipping = false;
treated_zeroes = true;
sep = true;
}
if (!part && !treated_zeroes) {
if (!skipping) {
skipping = true;
sep = true;
}
}
if (sep) {
sol_buffer_append_char(buf, ':');
if (skipping)
sep = false;
}
if (skipping)
continue;
sol_buffer_append_printf(buf, "%" PRIx16, part);
sep = true;
}
if (skipping)
sol_buffer_append_char(buf, ':');
return p;
}
SOL_API int
sol_buffer_append_from_base16(struct sol_buffer *buf, const struct sol_str_slice slice, enum sol_decode_case decode_case)
{
char *p;
size_t new_size;
ssize_t decoded_size, r;
const size_t nul_size = nul_byte_size(buf);
int err;
SOL_NULL_CHECK(buf, -EINVAL);
if (slice.len == 0)
return 0;
decoded_size = sol_util_base16_calculate_decoded_len(slice);
if (decoded_size < 0)
return decoded_size;
err = sol_util_size_add(buf->used, decoded_size, &new_size);
if (err < 0)
return err;
if (nul_size) {
err = sol_util_size_add(new_size, nul_size, &new_size);
if (err < 0)
return err;
}
err = sol_buffer_ensure(buf, new_size);
if (err < 0)
return err;
p = sol_buffer_at_end(buf);
r = sol_util_base16_decode(p, decoded_size, slice, decode_case);
if (r != decoded_size) {
if (nul_size)
sol_buffer_ensure_nul_byte(buf);
if (r < 0)
return r;
else
return -EINVAL;
}
buf->used += decoded_size;
if (nul_size)
return sol_buffer_ensure_nul_byte(buf);
return 0;
}
SOL_API int
sol_buffer_append_as_base64(struct sol_buffer *buf, const struct sol_str_slice slice, const char base64_map[SOL_STATIC_ARRAY_SIZE(65)])
{
char *p;
size_t new_size;
ssize_t encoded_size, r;
const size_t nul_size = nul_byte_size(buf);
int err;
SOL_NULL_CHECK(buf, -EINVAL);
if (slice.len == 0)
return 0;
encoded_size = sol_util_base64_calculate_encoded_len(slice, base64_map);
if (encoded_size < 0)
return encoded_size;
err = sol_util_size_add(buf->used, encoded_size, &new_size);
if (err < 0)
return err;
if (nul_size) {
err = sol_util_size_add(new_size, nul_size, &new_size);
if (err < 0)
return err;
}
err = sol_buffer_ensure(buf, new_size);
if (err < 0)
return err;
p = sol_buffer_at_end(buf);
r = sol_util_base64_encode(p, encoded_size, slice, base64_map);
if (r != encoded_size) {
if (nul_size)
sol_buffer_ensure_nul_byte(buf);
if (r < 0)
return r;
else
return -EINVAL;
}
buf->used += encoded_size;
if (nul_size)
return sol_buffer_ensure_nul_byte(buf);
return 0;
}
SOL_API int
sol_buffer_ensure_nul_byte(struct sol_buffer *buf)
{
SOL_NULL_CHECK(buf, -EINVAL);
if (buf->flags & SOL_BUFFER_FLAGS_NO_NUL_BYTE)
return -EINVAL;
if (buf->used && *((char *)sol_buffer_at_end(buf) - 1) == '\0')
return 0;
if (buf->used >= SIZE_MAX - 1 ||
sol_buffer_ensure(buf, buf->used + 1) < 0)
return -ENOMEM;
*((char *)buf->data + buf->used) = '\0';
return 0;
}
SOL_API char *
sol_util_strerror(int errnum, struct sol_buffer *buf)
{
char *ret;
int err;
SOL_NULL_CHECK(buf, NULL);
#define CHUNK_SIZE (512)
#ifdef HAVE_XSI_STRERROR_R
/* XSI-compliant strerror_r returns int */
while (1) {
errno = 0;
ret = sol_buffer_at_end(buf);
err = strerror_r(errnum, ret, buf->capacity - buf->used);
if (err == ERANGE || (err < 0 && errno == ERANGE)) {
err = sol_buffer_expand(buf, CHUNK_SIZE);
SOL_INT_CHECK(err, < 0, NULL);
} else if (err != 0)
SOL_API char *
sol_json_escape_string(const char *str, struct sol_buffer *buf)
{
char *out, *r_str;
size_t i, escaped_len;
int r;
SOL_NULL_CHECK(str, NULL);
SOL_NULL_CHECK(buf, NULL);
escaped_len = sol_json_calculate_escaped_string_len(str);
r = sol_buffer_expand(buf, escaped_len);
SOL_INT_CHECK(r, < 0, NULL);
r_str = out = sol_buffer_at_end(buf);
for (i = 0; *str && i < escaped_len; str++, i++) {
if (memchr(sol_json_escapable_chars, *str, sizeof(sol_json_escapable_chars))) {
*out++ = '\\';
switch (*str) {
case '"': *out++ = '"'; break;
case '\\': *out++ = '\\'; break;
case '/': *out++ = '/'; break;
case '\b': *out++ = 'b'; break;
case '\f': *out++ = 'f'; break;
case '\n': *out++ = 'n'; break;
case '\r': *out++ = 'r'; break;
case '\t': *out++ = 't'; break;
}
} else {
*out++ = *str;
}
}
*out++ = '\0';
buf->used += escaped_len - 1;
return r_str;
}
SOL_API int
sol_buffer_insert_slice(struct sol_buffer *buf, size_t pos, const struct sol_str_slice slice)
{
const size_t nul_size = nul_byte_size(buf);
char *p;
size_t new_size;
int err;
SOL_NULL_CHECK(buf, -EINVAL);
SOL_INT_CHECK(pos, > buf->used, -EINVAL);
if (pos == buf->used)
return sol_buffer_append_slice(buf, slice);
err = sol_util_size_add(buf->used, slice.len, &new_size);
if (err < 0)
return err;
/* Extra room for the ending NUL-byte. */
if (new_size >= SIZE_MAX - nul_size)
return -EOVERFLOW;
err = sol_buffer_ensure(buf, new_size + nul_size);
if (err < 0)
return err;
p = sol_buffer_at(buf, pos);
memmove(p + slice.len, p, buf->used - pos);
memcpy(p, slice.data, slice.len);
buf->used += slice.len;
if (nul_size) {
p = sol_buffer_at_end(buf);
p[0] = '\0';
}
return 0;
}
const char *r;
SOL_NULL_CHECK(addr, NULL);
SOL_NULL_CHECK(buf, NULL);
if (addr->family != SOL_NETWORK_FAMILY_INET6)
return NULL;
if (buf->capacity - buf->used < IPV6_ADDR_MAX_STR_LEN) {
int err;
err = sol_buffer_expand(buf, IPV6_ADDR_MAX_STR_LEN);
SOL_INT_CHECK(err, < 0, NULL);
}
r = ipv6_addr_to_str(sol_buffer_at_end(buf), (ipv6_addr_t *)&addr->addr,
IPV6_ADDR_MAX_STR_LEN);
if (r)
buf->used += strlen(r);
return r;
#else
return NULL;
#endif
}
SOL_API const struct sol_network_link_addr *
sol_network_link_addr_from_str(struct sol_network_link_addr *addr, const char *buf)
{