1 /* See LICENSE file for copyright and license details. */
2 #include <stddef.h>
3 #include <stdint.h>
4 #include <stdio.h>
5 #include <string.h>
6 
7 #include "../grapheme.h"
8 #include "util.h"
9 
10 static const struct {
11 	uint_least32_t cp;      /* input codepoint */
12 	char          *exp_arr; /* expected UTF-8 byte sequence */
13 	size_t         exp_len; /* expected length of UTF-8 sequence */
14 } enc_test[] = {
15 	{
16 		/* invalid codepoint (UTF-16 surrogate half) */
17 		.cp      = UINT32_C(0xD800),
18 		.exp_arr = (char *)(unsigned char[]){ 0xEF, 0xBF, 0xBD },
19 		.exp_len = 3,
20 	},
21 	{
22 		/* invalid codepoint (UTF-16-unrepresentable) */
23 		.cp      = UINT32_C(0x110000),
24 		.exp_arr = (char *)(unsigned char[]){ 0xEF, 0xBF, 0xBD },
25 		.exp_len = 3,
26 	},
27 	{
28 		/* codepoint encoded to a 1-byte sequence */
29 		.cp      = 0x01,
30 		.exp_arr = (char *)(unsigned char[]){ 0x01 },
31 		.exp_len = 1,
32 	},
33 	{
34 		/* codepoint encoded to a 2-byte sequence */
35 		.cp      = 0xFF,
36 		.exp_arr = (char *)(unsigned char[]){ 0xC3, 0xBF },
37 		.exp_len = 2,
38 	},
39 	{
40 		/* codepoint encoded to a 3-byte sequence */
41 		.cp      = 0xFFF,
42 		.exp_arr = (char *)(unsigned char[]){ 0xE0, 0xBF, 0xBF },
43 		.exp_len = 3,
44 	},
45 	{
46 		/* codepoint encoded to a 4-byte sequence */
47 		.cp      = UINT32_C(0xFFFFF),
48 		.exp_arr = (char *)(unsigned char[]){ 0xF3, 0xBF, 0xBF, 0xBF },
49 		.exp_len = 4,
50 	},
51 };
52 
53 int
54 main(int argc, char *argv[])
55 {
56 	size_t i, j, failed;
57 
58 	(void)argc;
59 
60 	/* UTF-8 encoder test */
61 	for (i = 0, failed = 0; i < LEN(enc_test); i++) {
62 		char arr[4];
63 		size_t len;
64 
65 		len = grapheme_encode_utf8(enc_test[i].cp, arr, LEN(arr));
66 
67 		if (len != enc_test[i].exp_len ||
68 		    memcmp(arr, enc_test[i].exp_arr, len)) {
69 			fprintf(stderr, "%s, Failed test %zu: "
70 			        "Expected (", argv[0], i);
71 			for (j = 0; j < enc_test[i].exp_len; j++) {
72 				fprintf(stderr, "0x%x",
73 				        enc_test[i].exp_arr[j]);
74 				if (j + 1 < enc_test[i].exp_len) {
75 					fprintf(stderr, " ");
76 				}
77 			}
78 			fprintf(stderr, "), but got (");
79 			for (j = 0; j < len; j++) {
80 				fprintf(stderr, "0x%x", arr[j]);
81 				if (j + 1 < len) {
82 					fprintf(stderr, " ");
83 				}
84 			}
85 			fprintf(stderr, ").\n");
86 			failed++;
87 		}
88 	}
89 	printf("%s: %zu/%zu unit tests passed.\n", argv[0],
90 	       LEN(enc_test) - failed, LEN(enc_test));
91 
92 	return (failed > 0) ? 1 : 0;
93 }