120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include "chat.h"
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// Adapted from <https://github.com/cbreeden/fxhash/blob/master/lib.rs>.
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static uint32_t hashChar(uint32_t hash, char ch) {
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hash = (hash << 5) | (hash >> 27);
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hash ^= ch;
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hash *= 0x27220A95;
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return hash;
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}
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enum IRCColor formatColor(const char *str) {
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if (!str) return IRCDefault;
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uint32_t hash = 0;
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for (; str[0]; ++str) {
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hash = hashChar(hash, str[0]);
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}
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while (IRCBlack == (hash & IRCLightGray)) {
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hash = hashChar(hash, '\0');
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}
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return (hash & IRCLightGray);
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}
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void formatReset(struct Format *format) {
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format->bold = false;
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format->italic = false;
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format->underline = false;
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format->reverse = false;
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format->fg = IRCDefault;
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format->bg = IRCDefault;
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}
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static void parseColor(struct Format *format) {
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size_t len = MIN(wcsspn(format->str, L"0123456789"), 2);
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if (!len) {
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format->fg = IRCDefault;
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format->bg = IRCDefault;
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return;
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}
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format->fg = 0;
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for (size_t i = 0; i < len; ++i) {
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format->fg *= 10;
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format->fg += format->str[i] - L'0';
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}
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if (format->fg > IRCLightGray) format->fg = IRCDefault;
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format->str = &format->str[len];
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len = 0;
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if (format->str[0] == L',') {
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len = MIN(wcsspn(&format->str[1], L"0123456789"), 2);
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}
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if (!len) return;
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format->bg = 0;
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for (size_t i = 0; i < len; ++i) {
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format->bg *= 10;
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format->bg += format->str[1 + i] - L'0';
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}
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if (format->bg > IRCLightGray) format->bg = IRCDefault;
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format->str = &format->str[1 + len];
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}
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static const wchar_t Stops[] = {
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L' ',
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IRCBold, IRCColor, IRCReverse, IRCReset, IRCItalic, IRCUnderline,
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L'\0',
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};
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bool formatParse(struct Format *format, const wchar_t *split) {
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format->str += format->len;
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if (!format->str[0]) {
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if (split == format->str && !format->split) {
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format->len = 0;
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format->split = true;
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return true;
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}
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return false;
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}
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const wchar_t *init = format->str;
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switch (format->str[0]) {
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break; case IRCBold: format->str++; format->bold ^= true;
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break; case IRCItalic: format->str++; format->italic ^= true;
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break; case IRCUnderline: format->str++; format->underline ^= true;
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break; case IRCReverse: format->str++; format->reverse ^= true;
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break; case IRCColor: format->str++; parseColor(format);
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break; case IRCReset: format->str++; formatReset(format);
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}
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format->split = (split >= init && split <= format->str);
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if (format->str[0] == L' ') {
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format->len = 1 + wcscspn(&format->str[1], Stops);
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} else {
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format->len = wcscspn(format->str, Stops);
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}
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if (split > format->str && split < &format->str[format->len]) {
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format->len = split - format->str;
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}
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return true;
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}
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