[hackers] [PATCH] rev, tail: replace hardcoded code by UTF8_POINT macro

[Elie Le Vaillant]

---
 rev.c  | 2 +-
 tail.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/rev.c b/rev.c
index 2d89df1..9ac1da6 100644
--- a/rev.c
+++ b/rev.c
@@ -25,7 +25,7 @@ rev(FILE *fp)
                lf = n && line[n - 1] == '\n';
                i = n -= lf;
                for (n = 0; i--;) {
-                       if ((line[i] & 0xC0) == 0x80) {
+                       if (UTF8_POINT(line[i])) {
                                n++;
                        } else {
                                fwrite(line + i, 1, n + 1, stdout);
diff --git a/tail.c b/tail.c
index ce3be9d..bbc5ad5 100644
--- a/tail.c
+++ b/tail.c
@@ -122,7 +122,7 @@ taketail(int fd, const char *fname, size_t count)
                case 'm':  /* runes */
                        for (p = buf + len - 1, left = count; p >= buf; p--) {
                                /* skip utf-8 continuation bytes */
-                               if ((*p & 0xc0) == 0x80)
+                               if (UTF8_POINT(*p))
                                        continue;
                                left--;
                                if (!left)
-- 
2.47.1