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