Initial Commit

libs/libgrapheme-2.0.2/benchmark/utf8-decode.c

@@ -0,0 +1,95 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../grapheme.h"
+#include "../gen/character-test.h"
+#include "util.h"
+
+#include <utf8proc.h>
+
+#define NUM_ITERATIONS 100000
+
+struct utf8_benchmark_payload {
+	char *buf;
+	utf8proc_uint8_t *buf_utf8proc;
+	size_t buflen;
+};
+
+void
+libgrapheme(const void *payload)
+{
+	const struct utf8_benchmark_payload *p = payload;
+	uint_least32_t cp;
+	size_t ret, off;
+
+	for (off = 0; off < p->buflen; off += ret) {
+		if ((ret = grapheme_decode_utf8(p->buf + off,
+		                                p->buflen - off, &cp)) >
+		    (p->buflen - off)) {
+			break;
+		}
+		(void)cp;
+	}
+}
+
+void
+libutf8proc(const void *payload)
+{
+	const struct utf8_benchmark_payload *p = payload;
+	utf8proc_int32_t cp;
+	utf8proc_ssize_t ret;
+	size_t off;
+
+	for (off = 0; off < p->buflen; off += (size_t)ret) {
+		if ((ret = utf8proc_iterate(p->buf_utf8proc + off,
+		                            (utf8proc_ssize_t)(p->buflen - off),
+				            &cp)) < 0) {
+			break;
+		}
+		(void)cp;
+	}
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct utf8_benchmark_payload p;
+	size_t i;
+	double baseline = (double)NAN;
+
+	(void)argc;
+
+	p.buf = generate_utf8_test_buffer(character_break_test,
+	                                  LEN(character_break_test),
+	                                  &(p.buflen));
+
+	/* convert cp-buffer to stupid custom libutf8proc-uint8-type */
+	if ((p.buf_utf8proc = malloc(p.buflen)) == NULL) {
+		fprintf(stderr, "malloc: %s\n", strerror(errno));
+		exit(1);
+	}
+	for (i = 0; i < p.buflen; i++) {
+		/* 
+		 * even if char is larger than 8 bit, it will only have
+		 * any of the first 8 bits set (by construction).
+		 */
+		p.buf_utf8proc[i] = (utf8proc_uint8_t)p.buf[i];
+	}
+
+	printf("%s\n", argv[0]);
+	run_benchmark(libgrapheme, &p, "libgrapheme ", NULL,
+	              "byte", &baseline, NUM_ITERATIONS, p.buflen);
+	run_benchmark(libutf8proc, &p, "libutf8proc ",
+	              "but unsafe (does not detect overlong encodings)",
+	              "byte", &baseline, NUM_ITERATIONS, p.buflen);
+
+	free(p.buf);
+	free(p.buf_utf8proc);
+
+	return 0;
+}