busybox/libbb/printable_string.c
Denys Vlasenko 0ef64bdb40 *: make GNU licensing statement forms more regular
This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-08-16 20:14:46 +02:00

66 lines
1.2 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Unicode support routines.
*
* Copyright (C) 2010 Denys Vlasenko
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#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_UNICODE_SUPPORT
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;
}