mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-22 21:32:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Add NetBSD support

Browse source
This commit is contained in:
Justine Tunney 2021-02-05 06:16:20 -08:00
parent 2fdc19e7a7
commit 23ae9dfceb
4020 changed files with 8955 additions and 8128 deletions
Download patch file Download diff file Expand all files Collapse all files

25
libc/unicode/strnwidth.c
View file

@ -16,7 +16,12 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/pcmpgtb.h"
#include "libc/intrin/pmovmskb.h"
#include "libc/intrin/psubb.h"
#include "libc/macros.h"
#include "libc/nexgen32e/bsf.h"
#include "libc/str/str.h"
#include "libc/str/thompike.h"
#include "libc/unicode/unicode.h"
@ -24,25 +29,31 @@
* Returns monospace display width of UTF-8 string.
*
* - Control codes are discounted
*
* - ANSI escape sequences are discounted
*
* - East asian glyphs, emoji, etc. count as two
*
* @param s is NUL-terminated string
* @param n is max bytes to consider
* @param o is offset for doing tabs
* @return monospace display width
*/
int strnwidth(const char *s, size_t n) {
int strnwidth(const char *s, size_t n, size_t o) {
size_t i;
wint_t c, w;
unsigned l, r;
unsigned l, r, k;
enum { kAscii, kUtf8, kEsc, kCsi } t;
for (w = r = t = l = 0; n--;) {
if ((c = *s++ & 0xff)) {
for (w = r = t = l = i = 0; i < n;) {
if ((c = s[i++] & 0xff)) {
switch (t) {
case kAscii:
if (0x20 <= c && c <= 0x7E || c == '\t') {
if (0x20 <= c && c <= 0x7E) {
++l;
} else if (c == '\t') {
if ((k = (o + i - 1) & 7)) {
l += 8 - k;
} else {
l += 8;
}
} else if (c == 033) {
t = kEsc;
} else if (c >= 0300) {