SOL_API int
sol_buffer_set_char_at(struct sol_buffer *buf, size_t pos, char c)
{
int err;
const size_t nul_size = nul_byte_size(buf);
SOL_NULL_CHECK(buf, -EINVAL);
if (buf->used < pos) {
return -EINVAL;
}
/* Extra room for the ending NUL-byte. */
if (1 >= SIZE_MAX - nul_size - pos)
return -EOVERFLOW;
err = sol_buffer_ensure(buf, pos + 1 + nul_size);
if (err < 0)
return err;
*((char *)buf->data + pos) = c;
if (pos + 1 >= buf->used)
buf->used = pos + 1;
if (nul_byte_size(buf))
return sol_buffer_ensure_nul_byte(buf);
return 0;
}
SOL_API int
sol_buffer_insert_char(struct sol_buffer *buf, size_t pos, const char c)
{
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_char(buf, c);
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(buf, pos);
memmove(p + 1, p, buf->used - pos);
*p = c;
buf->used++;
if (nul_byte_size(buf))
return sol_buffer_ensure_nul_byte(buf);
return 0;
}
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_set_slice_at(struct sol_buffer *buf, size_t pos, const struct sol_str_slice slice)
{
int err;
const size_t nul_size = nul_byte_size(buf);
SOL_NULL_CHECK(buf, -EINVAL);
if (buf->used < pos) {
return -EINVAL;
}
/* Extra room for the ending NUL-byte. */
if (slice.len >= SIZE_MAX - nul_size - pos)
return -EOVERFLOW;
err = sol_buffer_ensure(buf, pos + slice.len + nul_size);
if (err < 0)
return err;
/* deal with possible overlaps with memmove */
memmove((char *)buf->data + pos, slice.data, slice.len);
if (pos + slice.len >= buf->used) {
buf->used = pos + slice.len;
/* only terminate if we're growing */
((char *)buf->data)[buf->used] = 0;
}
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 int
sol_buffer_ensure(struct sol_buffer *buf, size_t min_size)
{
int err;
SOL_NULL_CHECK(buf, -EINVAL);
if (min_size >= SIZE_MAX - nul_byte_size(buf))
return -EINVAL;
if (buf->capacity >= min_size)
return 0;
err = sol_buffer_resize(buf, align_power2(min_size + nul_byte_size(buf)));
if (err == -EPERM)
return -ENOMEM;
return err;
}
SOL_API int
sol_buffer_set_slice(struct sol_buffer *buf, const struct sol_str_slice slice)
{
int err;
SOL_NULL_CHECK(buf, -EINVAL);
/* Extra room for the ending NUL-byte. */
if (slice.len >= SIZE_MAX - nul_byte_size(buf))
return -EOVERFLOW;
err = sol_buffer_ensure(buf, slice.len + nul_byte_size(buf));
if (err < 0)
return err;
sol_str_slice_copy(buf->data, slice);
buf->used = slice.len;
return 0;
}
SOL_API int
sol_buffer_insert_from_base16(struct sol_buffer *buf, size_t pos, 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);
SOL_INT_CHECK(pos, > buf->used, -EINVAL);
if (slice.len == 0)
return 0;
if (pos == buf->used)
return sol_buffer_append_from_base16(buf, slice, decode_case);
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(buf, pos);
memmove(p + decoded_size, p, buf->used - pos);
r = sol_util_base16_decode(p, decoded_size, slice, decode_case);
if (r != decoded_size) {
memmove(p, p + decoded_size, buf->used - pos);
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_insert_as_base64(struct sol_buffer *buf, size_t pos, 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);
SOL_INT_CHECK(pos, > buf->used, -EINVAL);
if (slice.len == 0)
return 0;
if (pos == buf->used)
return sol_buffer_append_as_base64(buf, slice, base64_map);
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(buf, pos);
memmove(p + encoded_size, p, buf->used - pos);
r = sol_util_base64_encode(p, encoded_size, slice, base64_map);
if (r != encoded_size) {
memmove(p, p + encoded_size, buf->used - pos);
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_append_as_base16(struct sol_buffer *buf, const struct sol_str_slice slice, bool uppercase)
{
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_base16_calculate_encoded_len(slice);
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_base16_encode(p, encoded_size, slice, uppercase);
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_append_from_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 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_base64_calculate_decoded_len(slice, base64_map);
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_base64_decode(p, decoded_size, slice, base64_map);
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_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;
}