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