| /* |
| * 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; |
| |
| } |
| |