mirror of
https://github.com/MidnightCommander/mc
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79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
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/* Copyright (c) 1992, 1999, 2001, 2002 John E. Davis
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* This file is part of the S-Lang library.
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*
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* Trimmed down for use in GNU Midnight Commander.
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Perl Artistic License.
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*/
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#include "slinclud.h"
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#include "slang.h"
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#include "_slang.h"
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/* p and ch may point to the same buffer */
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char *_SLexpand_escaped_char(char *p, char *ch)
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{
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int i = 0;
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int max = 0, num, base = 0;
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char ch1;
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ch1 = *p++;
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switch (ch1)
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{
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default: num = ch1; break;
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case 'n': num = '\n'; break;
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case 't': num = '\t'; break;
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case 'v': num = '\v'; break;
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case 'b': num = '\b'; break;
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case 'r': num = '\r'; break;
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case 'f': num = '\f'; break;
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case 'E': case 'e': num = 27; break;
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case 'a': num = 7;
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break;
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/* octal */
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case '0': case '1': case '2': case '3':
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case '4': case '5': case '6': case '7':
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max = '7';
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base = 8; i = 2; num = ch1 - '0';
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break;
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case 'd': /* decimal -- S-Lang extension */
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base = 10;
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i = 3;
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max = '9';
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num = 0;
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break;
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case 'x': /* hex */
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base = 16;
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max = '9';
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i = 2;
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num = 0;
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break;
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}
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while (i--)
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{
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ch1 = *p;
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if ((ch1 <= max) && (ch1 >= '0'))
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{
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num = base * num + (ch1 - '0');
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}
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else if (base == 16)
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{
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ch1 |= 0x20;
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if ((ch1 < 'a') || ((ch1 > 'f'))) break;
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num = base * num + 10 + (ch1 - 'a');
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}
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else break;
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p++;
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}
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*ch = (char) num;
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return p;
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}
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