guacamole-spice-protocol/src/common/guac_iconv.c

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/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "guac_iconv.h"
#include <guacamole/unicode.h>
#include <stdint.h>
void guac_iconv(guac_iconv_read* reader, char** input, int in_remaining,
guac_iconv_write* writer, char** output, int out_remaining) {
while (in_remaining > 0 && out_remaining > 0) {
int value;
char* read_start;
char* write_start;
/* Read character */
read_start = *input;
value = reader(input, in_remaining);
in_remaining -= *input - read_start;
/* Write character */
write_start = *output;
writer(output, out_remaining, value);
out_remaining -= *output - write_start;
/* Stop if null terminator reached */
if (value == 0)
break;
}
}
int GUAC_READ_UTF8(char** input, int remaining) {
int value;
*input += guac_utf8_read(*input, remaining, &value);
return value;
}
int GUAC_READ_UTF16(char** input, int remaining) {
int value;
/* Bail if not enough data */
if (remaining < 2)
return 0;
/* Read two bytes as integer */
value = *((uint16_t*) *input);
*input += 2;
return value;
}
void GUAC_WRITE_UTF8(char** output, int remaining, int value) {
*output += guac_utf8_write(value, *output, remaining);
}
void GUAC_WRITE_UTF16(char** output, int remaining, int value) {
/* Bail if not enough data */
if (remaining < 2)
return;
/* Write two bytes as integer */
*((uint16_t*) *output) = value;
*output += 2;
}