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https://github.com/topjohnwu/ndk-busybox.git
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66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Unicode support routines.
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*
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* Copyright (C) 2010 Denys Vlasenko
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*
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* Licensed under GPL version 2, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include "unicode.h"
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const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str)
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{
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static char *saved[4];
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static unsigned cur_saved; /* = 0 */
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char *dst;
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const char *s;
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s = str;
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while (1) {
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unsigned char c = *s;
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if (c == '\0') {
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/* 99+% of inputs do not need conversion */
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if (stats) {
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stats->byte_count = (s - str);
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stats->unicode_count = (s - str);
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stats->unicode_width = (s - str);
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}
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return str;
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}
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if (c < ' ')
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break;
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if (c >= 0x7f)
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break;
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s++;
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}
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#if ENABLE_UNICODE_SUPPORT
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dst = unicode_conv_to_printable(stats, str);
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#else
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{
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char *d = dst = xstrdup(str);
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while (1) {
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unsigned char c = *d;
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if (c == '\0')
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break;
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if (c < ' ' || c >= 0x7f)
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*d = '?';
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d++;
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}
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if (stats) {
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stats->byte_count = (d - dst);
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stats->unicode_count = (d - dst);
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stats->unicode_width = (d - dst);
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}
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}
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#endif
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free(saved[cur_saved]);
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saved[cur_saved] = dst;
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cur_saved = (cur_saved + 1) & (ARRAY_SIZE(saved)-1);
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return dst;
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}
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