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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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libc/nexgen32e/doc/cescapec.c Normal file
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/*-*- 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;
}
}
}
}