summaryrefslogtreecommitdiff
path: root/lib/unistr/u8-mbtouc-aux.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/unistr/u8-mbtouc-aux.c')
-rw-r--r--lib/unistr/u8-mbtouc-aux.c108
1 files changed, 73 insertions, 35 deletions
diff --git a/lib/unistr/u8-mbtouc-aux.c b/lib/unistr/u8-mbtouc-aux.c
index 018cf507..22ed807b 100644
--- a/lib/unistr/u8-mbtouc-aux.c
+++ b/lib/unistr/u8-mbtouc-aux.c
@@ -1,5 +1,5 @@
/* Conversion UTF-8 to UCS-4.
- Copyright (C) 2001-2002, 2006-2007, 2009-2022 Free Software Foundation, Inc.
+ Copyright (C) 2001-2002, 2006-2007, 2009-2024 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2001.
This file is free software: you can redistribute it and/or modify
@@ -52,20 +52,15 @@ u8_mbtouc_aux (ucs4_t *puc, const uint8_t *s, size_t n)
{
if (n >= 3)
{
- if ((s[1] ^ 0x80) < 0x40)
+ if ((s[1] ^ 0x80) < 0x40
+ && (c >= 0xe1 || s[1] >= 0xa0)
+ && (c != 0xed || s[1] < 0xa0))
{
if ((s[2] ^ 0x80) < 0x40)
{
- if ((c >= 0xe1 || s[1] >= 0xa0)
- && (c != 0xed || s[1] < 0xa0))
- {
- *puc = ((unsigned int) (c & 0x0f) << 12)
- | ((unsigned int) (s[1] ^ 0x80) << 6)
- | (unsigned int) (s[2] ^ 0x80);
- return 3;
- }
- /* invalid multibyte character */
- *puc = 0xfffd;
+ *puc = ((unsigned int) (c & 0x0f) << 12)
+ | ((unsigned int) (s[1] ^ 0x80) << 6)
+ | (unsigned int) (s[2] ^ 0x80);
return 3;
}
/* invalid multibyte character */
@@ -73,38 +68,50 @@ u8_mbtouc_aux (ucs4_t *puc, const uint8_t *s, size_t n)
return 2;
}
/* invalid multibyte character */
+ *puc = 0xfffd;
+ return 1;
}
else
{
- /* incomplete multibyte character */
*puc = 0xfffd;
- if (n == 1 || (s[1] ^ 0x80) >= 0x40)
- return 1;
+ if (n == 1)
+ {
+ /* incomplete multibyte character */
+ return 1;
+ }
else
- return 2;
+ {
+ if ((s[1] ^ 0x80) < 0x40
+ && (c >= 0xe1 || s[1] >= 0xa0)
+ && (c != 0xed || s[1] < 0xa0))
+ {
+ /* incomplete multibyte character */
+ return 2;
+ }
+ else
+ {
+ /* invalid multibyte character */
+ return 1;
+ }
+ }
}
}
- else if (c < 0xf8)
+ else if (c <= 0xf4)
{
if (n >= 4)
{
- if ((s[1] ^ 0x80) < 0x40)
+ if ((s[1] ^ 0x80) < 0x40
+ && (c >= 0xf1 || s[1] >= 0x90)
+ && (c < 0xf4 || (/* c == 0xf4 && */ s[1] < 0x90)))
{
if ((s[2] ^ 0x80) < 0x40)
{
if ((s[3] ^ 0x80) < 0x40)
{
- if ((c >= 0xf1 || s[1] >= 0x90)
- && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90)))
- {
- *puc = ((unsigned int) (c & 0x07) << 18)
- | ((unsigned int) (s[1] ^ 0x80) << 12)
- | ((unsigned int) (s[2] ^ 0x80) << 6)
- | (unsigned int) (s[3] ^ 0x80);
- return 4;
- }
- /* invalid multibyte character */
- *puc = 0xfffd;
+ *puc = ((unsigned int) (c & 0x07) << 18)
+ | ((unsigned int) (s[1] ^ 0x80) << 12)
+ | ((unsigned int) (s[2] ^ 0x80) << 6)
+ | (unsigned int) (s[3] ^ 0x80);
return 4;
}
/* invalid multibyte character */
@@ -116,17 +123,48 @@ u8_mbtouc_aux (ucs4_t *puc, const uint8_t *s, size_t n)
return 2;
}
/* invalid multibyte character */
+ *puc = 0xfffd;
+ return 1;
}
else
{
- /* incomplete multibyte character */
*puc = 0xfffd;
- if (n == 1 || (s[1] ^ 0x80) >= 0x40)
- return 1;
- else if (n == 2 || (s[2] ^ 0x80) >= 0x40)
- return 2;
+ if (n == 1)
+ {
+ /* incomplete multibyte character */
+ return 1;
+ }
else
- return 3;
+ {
+ if ((s[1] ^ 0x80) < 0x40
+ && (c >= 0xf1 || s[1] >= 0x90)
+ && (c < 0xf4 || (/* c == 0xf4 && */ s[1] < 0x90)))
+ {
+ if (n == 2)
+ {
+ /* incomplete multibyte character */
+ return 2;
+ }
+ else
+ {
+ if ((s[2] ^ 0x80) < 0x40)
+ {
+ /* incomplete multibyte character */
+ return 3;
+ }
+ else
+ {
+ /* invalid multibyte character */
+ return 2;
+ }
+ }
+ }
+ else
+ {
+ /* invalid multibyte character */
+ return 1;
+ }
+ }
}
}
}