improve printutf8pad - stagit-gopher - A git gopher frontend. (mirror)
(HTM) git clone git://bitreich.org/stagit-gopher/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/stagit-gopher/
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---
(DIR) commit 22d8f0453a32ca7e9cc13382170fc38234597a88
(DIR) parent 33f9c2a548fa4d2b31c66530ea1d14f852573187
(HTM) Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Fri, 23 Jun 2017 12:26:28 +0200
improve printutf8pad
correct truncation and count of utf-8 runes using mbtowc
Diffstat:
M stagit-gopher-index.c | 34 ++++++++++++++++----------------
M stagit-gopher.c | 35 +++++++++++++++----------------
2 files changed, 34 insertions(+), 35 deletions(-)
---
(DIR) diff --git a/stagit-gopher-index.c b/stagit-gopher-index.c
@@ -25,32 +25,32 @@ static char *name = "";
#define pledge(p1,p2) 0
#endif
-#define ISUTF8(c) (((c) & 0xc0) != 0x80)
-
/* print `len' columns of characters. If string is shorter pad the rest
* with characters `pad`. */
void
printutf8pad(FILE *fp, const char *s, size_t len, int pad)
{
wchar_t w;
- size_t n = 0, i;
- int r;
+ size_t col = 0, i, slen;
+ int rl, wc;
+
+ if (!len)
+ return;
- for (i = 0; *s && n < len; i++, s++) {
- if (ISUTF8(*s)) {
- if ((r = mbtowc(&w, s, 4)) == -1)
- break;
- if ((r = wcwidth(w)) == -1)
- r = 1;
- n += (size_t)r;
- if (n >= len) {
- fputs("\xe2\x80\xa6", fp);
- break;
- }
+ slen = strlen(s);
+ for (i = 0; i < slen && col < len + 1; i += rl) {
+ if ((rl = mbtowc(&w, &s[i], slen - i < 4 ? slen - i : 4)) <= 0)
+ break;
+ if ((wc = wcwidth(w)) == -1)
+ wc = 1;
+ col += (size_t)wc;
+ if (col >= len && s[i + rl]) {
+ fputs("\xe2\x80\xa6", fp);
+ break;
}
- putc(*s, fp);
+ fwrite(&s[i], 1, rl, fp);
}
- for (; n < len; n++)
+ for (; col < len; col++)
putc(pad, fp);
}
(DIR) diff --git a/stagit-gopher.c b/stagit-gopher.c
@@ -68,33 +68,32 @@ static const char *cachefile;
#define pledge(p1,p2) 0
#endif
-#define ISUTF8(c) (((c) & 0xc0) != 0x80)
-
/* print `len' columns of characters. If string is shorter pad the rest
* with characters `pad`. */
void
printutf8pad(FILE *fp, const char *s, size_t len, int pad)
{
wchar_t w;
- size_t n = 0, i;
- int r;
+ size_t col = 0, i, slen;
+ int rl, wc;
- for (i = 0; *s && n < len; i++, s++) {
- if (ISUTF8(*s)) {
- if (mbtowc(&w, s, 4) == -1)
- break;
- if ((r = wcwidth(w)) == -1)
- r = 1;
- n += (size_t)r;
- if (n >= len) {
- fputs("\xe2\x80\xa6", fp);
- break;
- }
+ if (!len)
+ return;
+
+ slen = strlen(s);
+ for (i = 0; i < slen && col < len + 1; i += rl) {
+ if ((rl = mbtowc(&w, &s[i], slen - i < 4 ? slen - i : 4)) <= 0)
+ break;
+ if ((wc = wcwidth(w)) == -1)
+ wc = 1;
+ col += (size_t)wc;
+ if (col >= len && s[i + rl]) {
+ fputs("\xe2\x80\xa6", fp);
+ break;
}
- putc(*s, fp);
+ fwrite(&s[i], 1, rl, fp);
}
-
- for (; n < len; n++)
+ for (; col < len; col++)
putc(pad, fp);
}