57 lines
2.7 KiB
C
57 lines
2.7 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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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 General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/internal.h"
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unsigned cescapec(int c) {
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unsigned char ch = c;
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switch (ch) {
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case '\a':
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return '\\' | 'a' << 8;
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case '\b':
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return '\\' | 'b' << 8;
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case '\v':
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return '\\' | 'v' << 8;
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case '\f':
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return '\\' | 'f' << 8;
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case '\?':
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return '\\' | '?' << 8;
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case '\n':
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return '\\' | 'n' << 8;
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case '\r':
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return '\\' | 'r' << 8;
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case '\t':
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return '\\' | 't' << 8;
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case '\"':
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return '\\' | '"' << 8;
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case '\'':
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return '\\' | '\'' << 8;
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case '\\':
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return '\\' | '\\' << 8;
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default: {
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if (ch >= 0x80 || !isprint(ch)) {
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return '\\' | (ch / 64 + '0') << 8 | (ch % 64 / 8 + '0') << 16 |
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(ch % 8 + '0') << 24;
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} else {
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return ch;
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}
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}
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}
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}
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