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#include "yaml_private.h"
/*
* Declarations.
*/
static int
yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem);
YAML_DECLARE(int)
yaml_emitter_flush(yaml_emitter_t *emitter);
/*
* Set the writer error and return 0.
*/
static int
yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem)
{
emitter->error = YAML_WRITER_ERROR;
emitter->problem = problem;
return 0;
}
/*
* Flush the output buffer.
*/
YAML_DECLARE(int)
yaml_emitter_flush(yaml_emitter_t *emitter)
{
int low, high;
assert(emitter); /* Non-NULL emitter object is expected. */
assert(emitter->write_handler); /* Write handler must be set. */
assert(emitter->encoding); /* Output encoding must be set. */
emitter->buffer.last = emitter->buffer.pointer;
emitter->buffer.pointer = emitter->buffer.start;
/* Check if the buffer is empty. */
if (emitter->buffer.start == emitter->buffer.last) {
return 1;
}
/* If the output encoding is UTF-8, we don't need to recode the buffer. */
if (emitter->encoding == YAML_UTF8_ENCODING)
{
if (emitter->write_handler(emitter->write_handler_data,
emitter->buffer.start,
emitter->buffer.last - emitter->buffer.start)) {
emitter->buffer.last = emitter->buffer.start;
emitter->buffer.pointer = emitter->buffer.start;
return 1;
}
else {
return yaml_emitter_set_writer_error(emitter, "write error");
}
}
/* Recode the buffer into the raw buffer. */
low = (emitter->encoding == YAML_UTF16LE_ENCODING ? 0 : 1);
high = (emitter->encoding == YAML_UTF16LE_ENCODING ? 1 : 0);
while (emitter->buffer.pointer != emitter->buffer.last)
{
unsigned char octet;
unsigned int width;
unsigned int value;
size_t k;
/*
* See the "reader.c" code for more details on UTF-8 encoding. Note
* that we assume that the buffer contains a valid UTF-8 sequence.
*/
/* Read the next UTF-8 character. */
octet = emitter->buffer.pointer[0];
width = (octet & 0x80) == 0x00 ? 1 :
(octet & 0xE0) == 0xC0 ? 2 :
(octet & 0xF0) == 0xE0 ? 3 :
(octet & 0xF8) == 0xF0 ? 4 : 0;
value = (octet & 0x80) == 0x00 ? octet & 0x7F :
(octet & 0xE0) == 0xC0 ? octet & 0x1F :
(octet & 0xF0) == 0xE0 ? octet & 0x0F :
(octet & 0xF8) == 0xF0 ? octet & 0x07 : 0;
for (k = 1; k < width; k ++) {
octet = emitter->buffer.pointer[k];
value = (value << 6) + (octet & 0x3F);
}
emitter->buffer.pointer += width;
/* Write the character. */
if (value < 0x10000)
{
emitter->raw_buffer.last[high] = value >> 8;
emitter->raw_buffer.last[low] = value & 0xFF;
emitter->raw_buffer.last += 2;
}
else
{
/* Write the character using a surrogate pair (check "reader.c"). */
value -= 0x10000;
emitter->raw_buffer.last[high] = 0xD8 + (value >> 18);
emitter->raw_buffer.last[low] = (value >> 10) & 0xFF;
emitter->raw_buffer.last[high+2] = 0xDC + ((value >> 8) & 0xFF);
emitter->raw_buffer.last[low+2] = value & 0xFF;
emitter->raw_buffer.last += 4;
}
}
/* Write the raw buffer. */
if (emitter->write_handler(emitter->write_handler_data,
emitter->raw_buffer.start,
emitter->raw_buffer.last - emitter->raw_buffer.start)) {
emitter->buffer.last = emitter->buffer.start;
emitter->buffer.pointer = emitter->buffer.start;
emitter->raw_buffer.last = emitter->raw_buffer.start;
emitter->raw_buffer.pointer = emitter->raw_buffer.start;
return 1;
}
else {
return yaml_emitter_set_writer_error(emitter, "write error");
}
}
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