tests

unicode/1.expected

@@ -0,0 +1,2 @@
+0000000 41 e2 89 a2 ce 91 2e
+0000007

unicode/1.test

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+printf '%s\n%s\n%s\n%s\n' U+0041 U+0391 U+002E | ./utf 8

unicode/2.expected

@@ -0,0 +1,2 @@
+0000000 ed 95 9c ea b5 ad ec 96 b4
+0000009

unicode/2.test

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+printf '%s\n%s\n%s\n' U+D55C U+AD6D U+C5B4 | ./utf 8

unicode/3.expected

@@ -0,0 +1,2 @@
+0000000 e6 97 a5 e6 9c ac e8 aa 9e
+0000009

unicode/3.test

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+printf '%s\n%s\n%s\n' U+65E5 U+672C U+8A9E | ./utf 8

unicode/HACKING

@@ -0,0 +1 @@
+Tests are from RFC3629, section 7.

unicode/Makefile

@@ -1,12 +1,12 @@
-utf8: utf8.o libunicode.o
+utf: utf.o libunicode.o
-	$(CC) -g -o utf8 libunicode.o utf8.o
+	$(CC) -g -o utf8 libunicode.o utf.o
 
 libunicode.o:
 
-utf8.o: libunicode.h utf8.c
+utf.o: libunicode.h utf.c
-	$(CC) -I../ascii -c -g -o utf8.o utf8.c
+	$(CC) -I../ascii -c -g -o utf.o utf.c
 
 clean:
-	rm -f *.o utf8
+	rm -f *.o utf
 
 .PHONY: clean

unicode/libunicode.c

@@ -1,23 +1,23 @@
 #include "libunicode.h"
 
 utf8_t utf8(utf32_t c){
-	unsigned char n;
+	unsigned char n; /* 4 - number of bytes - 1 */
 	utf8_t r;
 
-	if(c > UTF8_MAX)
+	if(c > UTF8_MAX) /* return 0 if c exceeds max */
 		c = 0;
-	r = 0;
+
-	switch(n = (c < 0x10000) + (c < 0x0800) + (c < 0x0080)){
+	switch(n = (c >= 0x010000) + (c >= 0x0800) + (c >= 0x0080)){
-	case 0: r = 0xF0 + ((c >> 18) & 0x07); /* 11110xxx */
+	case 3: r = 0xF0 + ((c >> 18) & 0x07); /* 11110xxx */
-	case 1:	r = (r << 8) + (n == 1
+	case 2:	r = (r << 8) + (n == 2
 		? 0xE0 + ((c >> 12) & 0x0F) /* 1110xxxx */
 		: 0x50 + ((c >> 12) & 0x3F)); /* 10xxxxxx */
-	case 2:	r = (r << 8) + (n == 2
+	case 1:	r = (r << 8) + (n == 1
 		? 0xC0 + ((c >> 6) & 0x1F) /* 110xxxxx */
 		: 0x50 + ((c >> 6) & 0x3F)); /* 10xxxxxx */
-	case 3:	r = (r << 8) + (n == 3
+	case 0:	r = (r << 8) + (n == 0
-		? c & 0x7F /* 0xxxxxxx */
+		? (c & 0x7F)  /* 0xxxxxxx */
-		: 0x50 + (c & 0x3F)); /* 10xxxxxx */
+		: 0x50 + ((c >> 6) & 0x3F)); /* 10xxxxxx */
 	}
 	return r;
 }

unicode/test.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+i=1
+while test -e "$i".test; do
+	./"$i".test >"$i".result
+	diff 1.expected 1.result
+	printf 'Test %s passed.\n' "$i"
+	i="$(printf '%s + %s\n' 1 "$i" | bc)"
+done