Adding upstream version 1.7.2.upstream/1.7.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 259 insertions, 0 deletions

diff --git a/misc/win32/utf8.c b/misc/win32/utf8.c
new file mode 100644
index 0000000..280f406
--- /dev/null
+++ b/misc/win32/utf8.c
@@ -0,0 +1,259 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_private.h"
+#include "apr_errno.h"
+#include "apr_arch_utf8.h"
+
+/* Implementation of RFC 3629, "UTF-8, a transformation format of ISO 10646"
+ * with particular attention to canonical translation forms (see section 10
+ * "Security Considerations" of the RFC for more info).
+ *
+ * Since several architectures including Windows support unicode, with UCS2
+ * used as the actual storage conventions by that archicture, these functions
+ * exist to transform or validate UCS2 strings into APR's 'char' type
+ * convention.  It is left up to the operating system to determine the
+ * validitity of the string, e.g. normative forms, in the context of 
+ * its native language support.  Other file systems which support filename 
+ * characters of 0x80-0xff but have no explicit requirement for Unicode
+ * will find this function useful only for validating the character sequences 
+ * and rejecting poorly encoded UTF8 sequences.
+ *
+ * Len UCS-4 range (hex) UTF-8 octet sequence (binary)
+ * 1:2 00000000-0000007F 0xxxxxxx
+ * 2:2 00000080-000007FF 110XXXXx 10xxxxxx
+ * 3:2 00000800-0000FFFF 1110XXXX 10Xxxxxx 10xxxxxx
+ * 4:4 00010000-001FFFFF 11110XXX 10XXxxxx 10xxxxxx 10xxxxxx
+ *     00200000-03FFFFFF 111110XX 10XXXxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *     04000000-7FFFFFFF 1111110X 10XXXXxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *
+ * One of the X bits must be 1 to avoid overlong representation of ucs2 values. 
+ *
+ * For conversion into ucs2, the 4th form is limited in range to 0010 FFFF,
+ * and the final two forms are used only by full ucs4, per RFC 3629;
+ *
+ *   "Pairs of UCS-2 values between D800 and DFFF (surrogate pairs in 
+ *   Unicode parlance), being actually UCS-4 characters transformed 
+ *   through UTF-16, need special treatment: the UTF-16 transformation 
+ *   must be undone, yielding a UCS-4 character that is then transformed 
+ *   as above."
+ *
+ * From RFC2781 UTF-16: the compressed ISO 10646 encoding bitmask
+ *
+ *  U' = U - 0x10000
+ *  U' = 00000000 0000yyyy yyyyyyxx xxxxxxxx
+ *                    W1 = 110110yy yyyyyyyy
+ *                    W2 = 110111xx xxxxxxxx
+ *  Max U' = 0000 00001111 11111111 11111111
+ *  Max U  = 0000 00010000 11111111 11111111
+ *
+ * Len is the table above is a mapping of bytes used for utf8:ucs2 values,
+ * which results in these conclusions of maximum allocations;
+ *
+ *  apr_conv_utf8_to_ucs2 out bytes:sizeof(in) * 1 <= Req <= sizeof(in) * 2
+ *  apr_conv_ucs2_to_utf8 out words:sizeof(in) / 2 <= Req <= sizeof(in) * 3 / 2
+ */
+
+APR_DECLARE(apr_status_t) apr_conv_utf8_to_ucs2(const char *in, 
+                                                apr_size_t *inbytes,
+                                                apr_wchar_t *out, 
+                                                apr_size_t *outwords)
+{
+    apr_int64_t newch, mask;
+    apr_size_t expect, eating;
+    int ch;
+    
+    while (*inbytes && *outwords) 
+    {
+        ch = (unsigned char)(*in++);
+        if (!(ch & 0200)) {
+            /* US-ASCII-7 plain text
+             */
+            --*inbytes;
+            --*outwords;
+            *(out++) = ch;
+        }
+        else
+        {
+            if ((ch & 0300) != 0300) { 
+                /* Multibyte Continuation is out of place
+                 */
+                return APR_EINVAL;
+            }
+            else
+            {
+                /* Multibyte Sequence Lead Character
+                 *
+                 * Compute the expected bytes while adjusting
+                 * or lead byte and leading zeros mask.
+                 */
+                mask = 0340;
+                expect = 1;
+                while ((ch & mask) == mask) {
+                    mask |= mask >> 1;
+                    if (++expect > 3) /* (truly 5 for ucs-4) */
+                        return APR_EINVAL;
+                }
+                newch = ch & ~mask;
+                eating = expect + 1;
+                if (*inbytes <= expect)
+                    return APR_INCOMPLETE;
+                /* Reject values of excessive leading 0 bits
+                 * utf-8 _demands_ the shortest possible byte length
+                 */
+                if (expect == 1) {
+                    if (!(newch & 0036))
+                        return APR_EINVAL;
+                }
+                else {
+                    /* Reject values of excessive leading 0 bits
+                     */
+                    if (!newch && !((unsigned char)*in & 0077 & (mask << 1)))
+                        return APR_EINVAL;
+                    if (expect == 2) {
+                        /* Reject values D800-DFFF when not utf16 encoded
+                         * (may not be an appropriate restriction for ucs-4)
+                         */
+                        if (newch == 0015 && ((unsigned char)*in & 0040))
+                            return APR_EINVAL;
+                    }
+                    else if (expect == 3) {
+                        /* Short circuit values > 110000
+                         */
+                        if (newch > 4)
+                            return APR_EINVAL;
+                        if (newch == 4 && ((unsigned char)*in & 0060))
+                            return APR_EINVAL;
+                    }
+                }
+                /* Where the boolean (expect > 2) is true, we will need
+                 * an extra word for the output.
+                 */
+                if (*outwords < (apr_size_t)(expect > 2) + 1) 
+                    break; /* buffer full */
+                while (expect--)
+                {
+                    /* Multibyte Continuation must be legal */
+                    if (((ch = (unsigned char)*(in++)) & 0300) != 0200)
+                        return APR_EINVAL;
+                    newch <<= 6;
+                    newch |= (ch & 0077);
+                }
+                *inbytes -= eating;
+                /* newch is now a true ucs-4 character
+                 *
+                 * now we need to fold to ucs-2
+                 */
+                if (newch < 0x10000) 
+                {
+                    --*outwords;
+                    *(out++) = (apr_wchar_t) newch;
+                }
+                else 
+                {
+                    *outwords -= 2;
+                    newch -= 0x10000;
+                    *(out++) = (apr_wchar_t) (0xD800 | (newch >> 10));
+                    *(out++) = (apr_wchar_t) (0xDC00 | (newch & 0x03FF));                    
+                }
+            }
+        }
+    }
+    /* Buffer full 'errors' aren't errors, the client must inspect both
+     * the inbytes and outwords values
+     */
+    return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_conv_ucs2_to_utf8(const apr_wchar_t *in, 
+                                                apr_size_t *inwords,
+                                                char *out, 
+                                                apr_size_t *outbytes)
+{
+    apr_int64_t newch, require;
+    apr_size_t need;
+    char *invout;
+    int ch;
+    
+    while (*inwords && *outbytes) 
+    {
+        ch = (unsigned short)(*in++);
+        if (ch < 0x80)
+        {
+            --*inwords;
+            --*outbytes;
+            *(out++) = (unsigned char) ch;
+        }
+        else 
+        {
+            if ((ch & 0xFC00) == 0xDC00) {
+                /* Invalid Leading ucs-2 Multiword Continuation Character
+                 */
+                return APR_EINVAL;
+            }
+            if ((ch & 0xFC00) == 0xD800) {
+                /* Leading ucs-2 Multiword Character
+                 */
+                if (*inwords < 2) {
+                    /* Missing ucs-2 Multiword Continuation Character
+                     */
+                    return APR_INCOMPLETE;
+                }
+                if (((unsigned short)(*in) & 0xFC00) != 0xDC00) {
+                    /* Invalid ucs-2 Multiword Continuation Character
+                     */
+                    return APR_EINVAL;
+                }
+                newch = (ch & 0x03FF) << 10 | ((unsigned short)(*in++) & 0x03FF);
+                newch += 0x10000;
+            }
+            else {
+                /* ucs-2 Single Word Character
+                 */
+                newch = ch;
+            }
+            /* Determine the absolute minimum utf-8 bytes required
+             */
+            require = newch >> 11;
+            need = 1;
+            while (require)
+                require >>= 5, ++need;
+            if (need >= *outbytes)
+                break; /* Insufficient buffer */
+            *inwords -= (need > 2) + 1;
+            *outbytes -= need + 1;
+            /* Compute the utf-8 characters in last to first order,
+             * calculating the lead character length bits along the way.
+             */
+            ch = 0200;
+            out += need + 1;
+            invout = out;
+            while (need--) {
+                ch |= ch >> 1;
+                *(--invout) = (unsigned char)(0200 | (newch & 0077));
+                newch >>= 6;
+            }
+            /* Compute the lead utf-8 character and move the dest offset
+             */
+            *(--invout) = (unsigned char)(ch | newch);
+        }
+    }
+    /* Buffer full 'errors' aren't errors, the client must inspect both
+     * the inwords and outbytes values
+     */
+    return APR_SUCCESS;    
+}