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path: root/vendor/librune/lib/utf8/u8prev.c
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Diffstat (limited to 'vendor/librune/lib/utf8/u8prev.c')
-rw-r--r--vendor/librune/lib/utf8/u8prev.c40
1 files changed, 0 insertions, 40 deletions
diff --git a/vendor/librune/lib/utf8/u8prev.c b/vendor/librune/lib/utf8/u8prev.c
deleted file mode 100644
index a219ae9..0000000
--- a/vendor/librune/lib/utf8/u8prev.c
+++ /dev/null
@@ -1,40 +0,0 @@
-#define _RUNE_NO_MACRO_WRAPPER 1
-#include "rune.h"
-#include "utf8.h"
-
-#include "internal/common.h"
-
-int
-u8prev(rune *ch, const char8_t **p, const char8_t *start)
-{
- int off;
- bool match = true;
- const char8_t *s = *p;
- ptrdiff_t d = s - start;
-
- if (d <= 0) {
- return 0;
- } else if (U1(s[-1])) {
- *ch = s[-1];
- off = 1;
- } else if (d > 1 && UC(s[-1]) && U2(s[-2])) {
- *ch = ((s[-2] & 0x1F) << 6) | (s[-1] & 0x3F);
- off = 2;
- } else if (d > 2 && UC(s[-1]) && UC(s[-2]) && U3(s[-3])) {
- *ch = ((s[-3] & 0x0F) << 12) | ((s[-2] & 0x3F) << 6) | (s[-1] & 0x3F);
- off = 3;
- } else if (d > 3 && UC(s[-1]) && UC(s[-2]) && UC(s[-3]) && U4(s[-4])) {
- *ch = ((s[-4] & 0x07) << 18) | ((s[-3] & 0x3F) << 12)
- | ((s[-2] & 0x3F) << 6) | (s[-1] & 0x3F);
- off = 4;
- } else
- match = false;
-
- if (!(match && u8chkr(*ch))) {
- *ch = RUNE_ERROR;
- off = 1;
- }
-
- *p -= off;
- return off;
-}