101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/*
|
|
* vim:ts=4:sw=4:expandtab
|
|
*
|
|
* i3 - an improved dynamic tiling window manager
|
|
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
|
|
*
|
|
* ucs2_to_utf8.c: Converts between UCS-2 and UTF-8, both of which are used in
|
|
* different contexts in X11.
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <err.h>
|
|
#include <iconv.h>
|
|
|
|
#include "libi3.h"
|
|
|
|
static iconv_t conversion_descriptor = 0;
|
|
static iconv_t conversion_descriptor2 = 0;
|
|
|
|
/*
|
|
* Returns the input string, but converted from UCS-2 to UTF-8. Memory will be
|
|
* allocated, thus the caller has to free the output.
|
|
*
|
|
*/
|
|
char *convert_ucs_to_utf8(char *input) {
|
|
size_t input_size = 2;
|
|
/* UTF-8 may consume up to 4 byte */
|
|
int buffer_size = 8;
|
|
|
|
char *buffer = scalloc(buffer_size);
|
|
size_t output_size = buffer_size;
|
|
/* We need to use an additional pointer, because iconv() modifies it */
|
|
char *output = buffer;
|
|
|
|
/* We convert the input into UCS-2 big endian */
|
|
if (conversion_descriptor == 0) {
|
|
conversion_descriptor = iconv_open("UTF-8", "UCS-2BE");
|
|
if (conversion_descriptor == 0) {
|
|
fprintf(stderr, "error opening the conversion context\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/* Get the conversion descriptor back to original state */
|
|
iconv(conversion_descriptor, NULL, NULL, NULL, NULL);
|
|
|
|
/* Convert our text */
|
|
int rc = iconv(conversion_descriptor, (void*)&input, &input_size, &output, &output_size);
|
|
if (rc == (size_t)-1) {
|
|
perror("Converting to UCS-2 failed");
|
|
return NULL;
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
/*
|
|
* Converts the given string to UCS-2 big endian for use with
|
|
* xcb_image_text_16(). The amount of real glyphs is stored in real_strlen,
|
|
* a buffer containing the UCS-2 encoded string (16 bit per glyph) is
|
|
* returned. It has to be freed when done.
|
|
*
|
|
*/
|
|
char *convert_utf8_to_ucs2(char *input, int *real_strlen) {
|
|
size_t input_size = strlen(input) + 1;
|
|
/* UCS-2 consumes exactly two bytes for each glyph */
|
|
int buffer_size = input_size * 2;
|
|
|
|
char *buffer = smalloc(buffer_size);
|
|
size_t output_size = buffer_size;
|
|
/* We need to use an additional pointer, because iconv() modifies it */
|
|
char *output = buffer;
|
|
|
|
/* We convert the input into UCS-2 big endian */
|
|
if (conversion_descriptor2 == 0) {
|
|
conversion_descriptor2 = iconv_open("UCS-2BE", "UTF-8");
|
|
if (conversion_descriptor2 == 0) {
|
|
fprintf(stderr, "error opening the conversion context\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/* Get the conversion descriptor back to original state */
|
|
iconv(conversion_descriptor2, NULL, NULL, NULL, NULL);
|
|
|
|
/* Convert our text */
|
|
int rc = iconv(conversion_descriptor2, (void*)&input, &input_size, &output, &output_size);
|
|
if (rc == (size_t)-1) {
|
|
perror("Converting to UCS-2 failed");
|
|
if (real_strlen != NULL)
|
|
*real_strlen = 0;
|
|
return NULL;
|
|
}
|
|
|
|
if (real_strlen != NULL)
|
|
*real_strlen = ((buffer_size - output_size) / 2) - 1;
|
|
|
|
return buffer;
|
|
}
|