108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
/*
|
|
* Licensed to the Apache Software Foundation (ASF) under one
|
|
* or more contributor license agreements. See the NOTICE file
|
|
* distributed with this work for additional information
|
|
* regarding copyright ownership. The ASF licenses this file
|
|
* to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing,
|
|
* software distributed under the License is distributed on an
|
|
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
* KIND, either express or implied. See the License for the
|
|
* specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "terminal/types.h"
|
|
|
|
#include <stdbool.h>
|
|
#include <unistd.h>
|
|
|
|
int guac_terminal_fit_to_range(int value, int min, int max) {
|
|
|
|
if (value < min) return min;
|
|
if (value > max) return max;
|
|
|
|
return value;
|
|
|
|
}
|
|
|
|
int guac_terminal_encode_utf8(int codepoint, char* utf8) {
|
|
|
|
int i;
|
|
int mask, bytes;
|
|
|
|
/* Determine size and initial byte mask */
|
|
if (codepoint <= 0x007F) {
|
|
mask = 0x00;
|
|
bytes = 1;
|
|
}
|
|
else if (codepoint <= 0x7FF) {
|
|
mask = 0xC0;
|
|
bytes = 2;
|
|
}
|
|
else if (codepoint <= 0xFFFF) {
|
|
mask = 0xE0;
|
|
bytes = 3;
|
|
}
|
|
else if (codepoint <= 0x1FFFFF) {
|
|
mask = 0xF0;
|
|
bytes = 4;
|
|
}
|
|
|
|
/* Otherwise, invalid codepoint */
|
|
else {
|
|
*(utf8++) = '?';
|
|
return 1;
|
|
}
|
|
|
|
/* Offset buffer by size */
|
|
utf8 += bytes - 1;
|
|
|
|
/* Add trailing bytes, if any */
|
|
for (i=1; i<bytes; i++) {
|
|
*(utf8--) = 0x80 | (codepoint & 0x3F);
|
|
codepoint >>= 6;
|
|
}
|
|
|
|
/* Set initial byte */
|
|
*utf8 = mask | codepoint;
|
|
|
|
/* Done */
|
|
return bytes;
|
|
|
|
}
|
|
|
|
bool guac_terminal_has_glyph(int codepoint) {
|
|
return
|
|
codepoint != 0
|
|
&& codepoint != ' '
|
|
&& codepoint != GUAC_CHAR_CONTINUATION;
|
|
}
|
|
|
|
int guac_terminal_write_all(int fd, const char* buffer, int size) {
|
|
|
|
int remaining = size;
|
|
while (remaining > 0) {
|
|
|
|
/* Attempt to write data */
|
|
int ret_val = write(fd, buffer, remaining);
|
|
if (ret_val <= 0)
|
|
return -1;
|
|
|
|
/* If successful, contine with what data remains (if any) */
|
|
remaining -= ret_val;
|
|
buffer += ret_val;
|
|
|
|
}
|
|
|
|
return size;
|
|
|
|
}
|
|
|