Last change
on this file since 3668 was 3621, checked in by Bruno Cornec, 8 years ago |
New 3?3 banch for incorporation of latest busybox 1.25. Changing minor version to handle potential incompatibilities.
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Property svn:eol-style
set to
native
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File size:
1000 bytes
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Utility routines.
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4 | *
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5 | * Copyright (C) 2007 Denys Vlasenko
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6 | *
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7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | #include "libbb.h"
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11 |
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12 | void FAST_FUNC fputc_printable(int ch, FILE *file)
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13 | {
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14 | if ((ch & (0x80 + PRINTABLE_META)) == (0x80 + PRINTABLE_META)) {
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15 | fputs("M-", file);
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16 | ch &= 0x7f;
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17 | }
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18 | ch = (unsigned char) ch;
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19 | if (ch == 0x9b) {
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20 | /* VT100's CSI, aka Meta-ESC, is not printable on vt-100 */
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21 | ch = '{';
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22 | goto print_caret;
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23 | }
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24 | if (ch < ' ') {
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25 | ch += '@';
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26 | goto print_caret;
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27 | }
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28 | if (ch == 0x7f) {
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29 | ch = '?';
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30 | print_caret:
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31 | fputc('^', file);
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32 | }
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33 | fputc(ch, file);
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34 | }
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35 |
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36 | void FAST_FUNC visible(unsigned ch, char *buf, int flags)
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37 | {
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38 | if (ch == '\t' && !(flags & VISIBLE_SHOW_TABS)) {
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39 | goto raw;
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40 | }
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41 | if (ch == '\n') {
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42 | if (flags & VISIBLE_ENDLINE)
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43 | *buf++ = '$';
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44 | } else {
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45 | if (ch >= 128) {
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46 | ch -= 128;
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47 | *buf++ = 'M';
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48 | *buf++ = '-';
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49 | }
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50 | if (ch < 32 || ch == 127) {
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51 | *buf++ = '^';
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52 | ch ^= 0x40;
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53 | }
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54 | }
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55 | raw:
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56 | *buf++ = ch;
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57 | *buf = '\0';
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58 | }
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