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-rw-r--r--src/libs/xpcom18a4/xpcom/io/nsEscape.cpp491
1 files changed, 491 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/io/nsEscape.cpp b/src/libs/xpcom18a4/xpcom/io/nsEscape.cpp
new file mode 100644
index 00000000..758339e4
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/io/nsEscape.cpp
@@ -0,0 +1,491 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (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.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+// First checked in on 98/12/03 by John R. McMullen, derived from net.h/mkparse.c.
+
+#include "nsEscape.h"
+#include "nsMemory.h"
+#include "nsCRT.h"
+#include "nsReadableUtils.h"
+
+const int netCharType[256] =
+/* Bit 0 xalpha -- the alphas
+** Bit 1 xpalpha -- as xalpha but
+** converts spaces to plus and plus to %2B
+** Bit 3 ... path -- as xalphas but doesn't escape '/'
+*/
+ /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
+ { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x */
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1x */
+ 0,0,0,0,0,0,0,0,0,0,7,4,0,7,7,4, /* 2x !"#$%&'()*+,-./ */
+ 7,7,7,7,7,7,7,7,7,7,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
+ 0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, /* 4x @ABCDEFGHIJKLMNO */
+ /* bits for '@' changed from 7 to 0 so '@' can be escaped */
+ /* in usernames and passwords in publishing. */
+ 7,7,7,7,7,7,7,7,7,7,7,0,0,0,0,7, /* 5X PQRSTUVWXYZ[\]^_ */
+ 0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, /* 6x `abcdefghijklmno */
+ 7,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0, /* 7X pqrstuvwxyz{\}~ DEL */
+ 0, };
+
+/* decode % escaped hex codes into character values
+ */
+#define UNHEX(C) \
+ ((C >= '0' && C <= '9') ? C - '0' : \
+ ((C >= 'A' && C <= 'F') ? C - 'A' + 10 : \
+ ((C >= 'a' && C <= 'f') ? C - 'a' + 10 : 0)))
+
+
+#define IS_OK(C) (netCharType[((unsigned int) (C))] & (mask))
+#define HEX_ESCAPE '%'
+
+//----------------------------------------------------------------------------------------
+static char* nsEscapeCount(
+ const char * str,
+ PRInt32 len,
+ nsEscapeMask mask,
+ PRInt32* out_len)
+//----------------------------------------------------------------------------------------
+{
+ if (!str)
+ return 0;
+
+ int i, extra = 0;
+ static const char hexChars[] = "0123456789ABCDEF";
+
+ register const unsigned char* src = (const unsigned char *) str;
+ for (i = 0; i < len; i++)
+ {
+ if (!IS_OK(*src++))
+ extra += 2; /* the escape, plus an extra byte for each nibble */
+ }
+
+ char* result = (char *)nsMemory::Alloc(len + extra + 1);
+ if (!result)
+ return 0;
+
+ register unsigned char* dst = (unsigned char *) result;
+ src = (const unsigned char *) str;
+ if (mask == url_XPAlphas)
+ {
+ for (i = 0; i < len; i++)
+ {
+ unsigned char c = *src++;
+ if (IS_OK(c))
+ *dst++ = c;
+ else if (c == ' ')
+ *dst++ = '+'; /* convert spaces to pluses */
+ else
+ {
+ *dst++ = HEX_ESCAPE;
+ *dst++ = hexChars[c >> 4]; /* high nibble */
+ *dst++ = hexChars[c & 0x0f]; /* low nibble */
+ }
+ }
+ }
+ else
+ {
+ for (i = 0; i < len; i++)
+ {
+ unsigned char c = *src++;
+ if (IS_OK(c))
+ *dst++ = c;
+ else
+ {
+ *dst++ = HEX_ESCAPE;
+ *dst++ = hexChars[c >> 4]; /* high nibble */
+ *dst++ = hexChars[c & 0x0f]; /* low nibble */
+ }
+ }
+ }
+
+ *dst = '\0'; /* tack on eos */
+ if(out_len)
+ *out_len = dst - (unsigned char *) result;
+ return result;
+}
+
+//----------------------------------------------------------------------------------------
+NS_COM char* nsEscape(const char * str, nsEscapeMask mask)
+//----------------------------------------------------------------------------------------
+{
+ if(!str)
+ return NULL;
+ return nsEscapeCount(str, (PRInt32)strlen(str), mask, NULL);
+}
+
+//----------------------------------------------------------------------------------------
+NS_COM char* nsUnescape(char * str)
+//----------------------------------------------------------------------------------------
+{
+ nsUnescapeCount(str);
+ return str;
+}
+
+//----------------------------------------------------------------------------------------
+NS_COM PRInt32 nsUnescapeCount(char * str)
+//----------------------------------------------------------------------------------------
+{
+ register char *src = str;
+ register char *dst = str;
+ static const char hexChars[] = "0123456789ABCDEFabcdef";
+
+ char c1[] = " ";
+ char c2[] = " ";
+ char* const pc1 = c1;
+ char* const pc2 = c2;
+
+ while (*src)
+ {
+ c1[0] = *(src+1);
+ if (*(src+1) == '\0')
+ c2[0] = '\0';
+ else
+ c2[0] = *(src+2);
+
+ if (*src != HEX_ESCAPE || PL_strpbrk(pc1, hexChars) == 0 ||
+ PL_strpbrk(pc2, hexChars) == 0 )
+ *dst++ = *src++;
+ else
+ {
+ src++; /* walk over escape */
+ if (*src)
+ {
+ *dst = UNHEX(*src) << 4;
+ src++;
+ }
+ if (*src)
+ {
+ *dst = (*dst + UNHEX(*src));
+ src++;
+ }
+ dst++;
+ }
+ }
+
+ *dst = 0;
+ return (int)(dst - str);
+
+} /* NET_UnEscapeCnt */
+
+
+NS_COM char *
+nsEscapeHTML(const char * string)
+{
+ /* XXX Hardcoded max entity len. The +1 is for the trailing null. */
+ char *rv = (char *) nsMemory::Alloc(strlen(string) * 6 + 1);
+ char *ptr = rv;
+
+ if(rv)
+ {
+ for(; *string != '\0'; string++)
+ {
+ if(*string == '<')
+ {
+ *ptr++ = '&';
+ *ptr++ = 'l';
+ *ptr++ = 't';
+ *ptr++ = ';';
+ }
+ else if(*string == '>')
+ {
+ *ptr++ = '&';
+ *ptr++ = 'g';
+ *ptr++ = 't';
+ *ptr++ = ';';
+ }
+ else if(*string == '&')
+ {
+ *ptr++ = '&';
+ *ptr++ = 'a';
+ *ptr++ = 'm';
+ *ptr++ = 'p';
+ *ptr++ = ';';
+ }
+ else if (*string == '"')
+ {
+ *ptr++ = '&';
+ *ptr++ = 'q';
+ *ptr++ = 'u';
+ *ptr++ = 'o';
+ *ptr++ = 't';
+ *ptr++ = ';';
+ }
+ else if (*string == '\'')
+ {
+ *ptr++ = '&';
+ *ptr++ = '#';
+ *ptr++ = '3';
+ *ptr++ = '9';
+ *ptr++ = ';';
+ }
+ else
+ {
+ *ptr++ = *string;
+ }
+ }
+ *ptr = '\0';
+ }
+
+ return(rv);
+}
+
+NS_COM PRUnichar *
+nsEscapeHTML2(const PRUnichar *aSourceBuffer, PRInt32 aSourceBufferLen)
+{
+ // if the caller didn't calculate the length
+ if (aSourceBufferLen == -1) {
+ aSourceBufferLen = nsCRT::strlen(aSourceBuffer); // ...then I will
+ }
+
+ /* XXX Hardcoded max entity len. */
+ PRUnichar *resultBuffer = (PRUnichar *)nsMemory::Alloc(aSourceBufferLen *
+ 6 * sizeof(PRUnichar) + sizeof(PRUnichar('\0')));
+ PRUnichar *ptr = resultBuffer;
+
+ if (resultBuffer) {
+ PRInt32 i;
+
+ for(i = 0; i < aSourceBufferLen; i++) {
+ if(aSourceBuffer[i] == '<') {
+ *ptr++ = '&';
+ *ptr++ = 'l';
+ *ptr++ = 't';
+ *ptr++ = ';';
+ } else if(aSourceBuffer[i] == '>') {
+ *ptr++ = '&';
+ *ptr++ = 'g';
+ *ptr++ = 't';
+ *ptr++ = ';';
+ } else if(aSourceBuffer[i] == '&') {
+ *ptr++ = '&';
+ *ptr++ = 'a';
+ *ptr++ = 'm';
+ *ptr++ = 'p';
+ *ptr++ = ';';
+ } else if (aSourceBuffer[i] == '"') {
+ *ptr++ = '&';
+ *ptr++ = 'q';
+ *ptr++ = 'u';
+ *ptr++ = 'o';
+ *ptr++ = 't';
+ *ptr++ = ';';
+ } else if (aSourceBuffer[i] == '\'') {
+ *ptr++ = '&';
+ *ptr++ = '#';
+ *ptr++ = '3';
+ *ptr++ = '9';
+ *ptr++ = ';';
+ } else {
+ *ptr++ = aSourceBuffer[i];
+ }
+ }
+ *ptr = 0;
+ }
+
+ return resultBuffer;
+}
+
+//----------------------------------------------------------------------------------------
+
+const int EscapeChars[256] =
+/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
+{
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x */
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 1x */
+ 0,1023, 0, 512,1023, 0,1023,1023,1023,1023,1023,1023,1023,1023, 953, 784, /* 2x !"#$%&'()*+,-./ */
+ 1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1008, 912, 0,1008, 0, 768, /* 3x 0123456789:;<=>? */
+ 1008,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023, /* 4x @ABCDEFGHIJKLMNO */
+ 1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023, 896, 896, 896, 896,1023, /* 5x PQRSTUVWXYZ[\]^_ */
+ 0,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023, /* 6x `abcdefghijklmno */
+ 1023,1023,1023,1023,1023,1023,1023,1023,1023,1023,1023, 896,1012, 896,1023, 0, /* 7x pqrstuvwxyz{|}~ */
+ 0 /* 8x DEL */
+};
+
+#define NO_NEED_ESC(C) (EscapeChars[((unsigned int) (C))] & (mask))
+
+//----------------------------------------------------------------------------------------
+
+/* returns an escaped string */
+
+/* use the following masks to specify which
+ part of an URL you want to escape:
+
+ esc_Scheme = 1
+ esc_Username = 2
+ esc_Password = 4
+ esc_Host = 8
+ esc_Directory = 16
+ esc_FileBaseName = 32
+ esc_FileExtension = 64
+ esc_Param = 128
+ esc_Query = 256
+ esc_Ref = 512
+*/
+
+/* by default this function will not escape parts of a string
+ that already look escaped, which means it already includes
+ a valid hexcode. This is done to avoid multiple escapes of
+ a string. Use the following mask to force escaping of a
+ string:
+
+ esc_Forced = 1024
+*/
+
+NS_COM PRBool NS_EscapeURL(const char *part,
+ PRInt32 partLen,
+ PRInt16 mask,
+ nsACString &result)
+{
+ if (!part) {
+ NS_NOTREACHED("null pointer");
+ return PR_FALSE;
+ }
+
+ int i = 0;
+ static const char hexChars[] = "0123456789ABCDEF";
+ if (partLen < 0)
+ partLen = strlen(part);
+ PRBool forced = (mask & esc_Forced);
+ PRBool ignoreNonAscii = (mask & esc_OnlyASCII);
+ PRBool ignoreAscii = (mask & esc_OnlyNonASCII);
+ PRBool writing = (mask & esc_AlwaysCopy);
+ PRBool colon = (mask & esc_Colon);
+
+ register const unsigned char* src = (const unsigned char *) part;
+
+ char tempBuffer[100];
+ unsigned int tempBufferPos = 0;
+
+ for (i = 0; i < partLen; i++)
+ {
+ unsigned char c = *src++;
+
+ // if the char has not to be escaped or whatever follows % is
+ // a valid escaped string, just copy the char.
+ //
+ // Also the % will not be escaped until forced
+ // See bugzilla bug 61269 for details why we changed this
+ //
+ // And, we will not escape non-ascii characters if requested.
+ // On special request we will also escape the colon even when
+ // not covered by the matrix.
+ // ignoreAscii is not honored for control characters (C0 and DEL)
+ if ((NO_NEED_ESC(c) || (c == HEX_ESCAPE && !forced)
+ || (c > 0x7f && ignoreNonAscii)
+ || (c > 0x1f && c < 0x7f && ignoreAscii))
+ && !(c == ':' && colon))
+ {
+ if (writing)
+ tempBuffer[tempBufferPos++] = c;
+ }
+ else /* do the escape magic */
+ {
+ if (!writing)
+ {
+ result.Append(part, i);
+ writing = PR_TRUE;
+ }
+ tempBuffer[tempBufferPos++] = HEX_ESCAPE;
+ tempBuffer[tempBufferPos++] = hexChars[c >> 4]; /* high nibble */
+ tempBuffer[tempBufferPos++] = hexChars[c & 0x0f]; /* low nibble */
+ }
+
+ if (tempBufferPos >= sizeof(tempBuffer) - 4)
+ {
+ NS_ASSERTION(writing, "should be writing");
+ tempBuffer[tempBufferPos] = '\0';
+ result += tempBuffer;
+ tempBufferPos = 0;
+ }
+ }
+ if (writing) {
+ tempBuffer[tempBufferPos] = '\0';
+ result += tempBuffer;
+ }
+ return writing;
+}
+
+#define ISHEX(c) memchr(hexChars, c, sizeof(hexChars)-1)
+
+NS_COM PRBool NS_UnescapeURL(const char *str, PRInt32 len, PRInt16 flags, nsACString &result)
+{
+ if (!str) {
+ NS_NOTREACHED("null pointer");
+ return PR_FALSE;
+ }
+
+ if (len < 0)
+ len = strlen(str);
+
+ PRBool ignoreNonAscii = (flags & esc_OnlyASCII);
+ PRBool writing = (flags & esc_AlwaysCopy);
+ PRBool skipControl = (flags & esc_SkipControl);
+
+ static const char hexChars[] = "0123456789ABCDEFabcdef";
+
+ const char *last = str;
+ const char *p = str;
+
+ for (int i=0; i<len; ++i, ++p) {
+ //printf("%c [i=%d of len=%d]\n", *p, i, len);
+ if (*p == HEX_ESCAPE && i < len-2) {
+ unsigned char *p1 = ((unsigned char *) p) + 1;
+ unsigned char *p2 = ((unsigned char *) p) + 2;
+ if (ISHEX(*p1) && ISHEX(*p2) && !(ignoreNonAscii && *p1 >= '8') &&
+ !(skipControl &&
+ (*p1 < '2' || (*p1 == '7' && (*p2 == 'f' || *p2 == 'F'))))) {
+ //printf("- p1=%c p2=%c\n", *p1, *p2);
+ writing = PR_TRUE;
+ if (p > last) {
+ //printf("- p=%p, last=%p\n", p, last);
+ result.Append(last, p - last);
+ last = p;
+ }
+ char u = (UNHEX(*p1) << 4) + UNHEX(*p2);
+ //printf("- u=%c\n", u);
+ result.Append(u);
+ i += 2;
+ p += 2;
+ last += 3;
+ }
+ }
+ }
+ if (writing && last < str + len)
+ result.Append(last, str + len - last);
+
+ return writing;
+}
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