First commit

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 29 insertions, 0 deletions

diff --git a/libcmap_find_script.c b/libcmap_find_script.c
new file mode 100644
index 0000000..f8787f8
--- /dev/null
+++ b/libcmap_find_script.c
@@ -0,0 +1,29 @@
+/* See LICENSE file for copyright and license details. */
+#include "libcmap.h"
+
+
+const struct libcmap_script *
+libcmap_find_script(uint32_t codepoint, size_t *offset_out, size_t *subrange_out)
+{
+	const struct libcmap_script *list = libcmap_script_list;
+	size_t i, j, n = libcmap_script_list_size;
+	size_t skipped;
+	for (i = 0; i < n; i++) {
+		skipped = 0;
+		for (j = 0; j < list[i].nranges; j++) {
+			if (list[i].ranges[j].first <= codepoint && list[i].ranges[j].last <= codepoint) {
+				if (offset_out)
+					*offset_out = skipped + (size_t)(codepoint - list[i].ranges[j].first);
+				if (subrange_out)
+					*subrange_out = j;
+				return &list[i];
+			}
+			skipped += (size_t)(list[i].ranges[j].last - list[i].ranges[j].first) + 1U;
+		}
+	}
+	if (offset_out)
+		*offset_out = (size_t)codepoint;
+	if (subrange_out)
+		*subrange_out = 0;
+	return NULL;
+}