From b7f2d80a2865623a1e45bca7cdcc6f7c476459d9 Mon Sep 17 00:00:00 2001
From: Ted Rolle Jr <tedp@php.net>
Date: Fri, 28 Apr 2000 14:24:38 +0000
Subject: [PATCH] Removed bug that prevented it to work on longer strings.
 Changed commenting to c-style commenting.

---
 ext/imap/php_imap.c | 51 ++++++++++++++++++++++-----------------------
 1 file changed, 25 insertions(+), 26 deletions(-)

diff --git a/ext/imap/php_imap.c b/ext/imap/php_imap.c
index 2f75f0fc6f..c68235b756 100644
--- a/ext/imap/php_imap.c
+++ b/ext/imap/php_imap.c
@@ -3425,6 +3425,7 @@ PHP_FUNCTION(imap_last_error)
    Decode mime header element in accordance with RFC 2047 and return array of objects containing 'charset' encoding and decoded 'text' */
 PHP_FUNCTION(imap_mime_header_decode)
 {
+	/* Author: Ted Parnefors <ted@mtv.se> */
 	zval **str, *myobject;
 	char *string, *charset, encoding, *text, *decode;
 	long charset_token, encoding_token, end_token, end, offset=0, i;
@@ -3445,11 +3446,11 @@ PHP_FUNCTION(imap_mime_header_decode)
 			
 	if ((charset=((char *)emalloc((end+1)*2)))) {
 		text=&charset[end+1];
-		while(offset<end) {													// Reached end of the string?
-			if ((charset_token=(long) php_memnstr(&string[offset], "=?", 2, string+end))) {		// Is there anything encoded in the string?
+		while(offset<end) {	/* Reached end of the string? */
+			if ((charset_token=(long) php_memnstr(&string[offset], "=?", 2, string+end))) {	/* Is there anything encoded in the string? */
 				charset_token -= (long)string;
-				if (offset!=charset_token) {										// Is there anything before the encoded data?
-					// Retrieve unencoded data that is found at the beginning
+				if (offset!=charset_token) {	/* Is there anything before the encoded data? */
+					/* Retrieve unencoded data that is found before encoded data */
 					memcpy(text, &string[offset], charset_token-offset);
 					text[charset_token-offset]=0x00;
 					MAKE_STD_ZVAL(myobject);
@@ -3458,21 +3459,21 @@ PHP_FUNCTION(imap_mime_header_decode)
 					add_property_string(myobject, "text", text, 1);
 					zend_hash_next_index_insert(return_value->value.ht,(void *)&myobject,sizeof(zval *),NULL);
 				}
-				if ((encoding_token=(long) php_memnstr(&string[charset_token+2], "?", 1, string+end))) {			// Find token for encoding
+				if ((encoding_token=(long) php_memnstr(&string[charset_token+2], "?", 1, string+end))) {		/* Find token for encoding */
 					encoding_token -= (long) string;
-					if ((end_token=(long) php_memnstr(&string[encoding_token+1], "?=", 2, string+end))) {		// Find token for end of encoded data
+					if ((end_token=(long) php_memnstr(&string[encoding_token+1], "?=", 2, string+end))) {	/* Find token for end of encoded data */
 						end_token -= (long) string;
-						memcpy(charset, &string[charset_token+2], encoding_token-(charset_token+2));	// Extract charset encoding
+						memcpy(charset, &string[charset_token+2], encoding_token-(charset_token+2));	/* Extract charset encoding */
 						charset[encoding_token-(charset_token+2)]=0x00;
-						encoding=string[encoding_token+1];										// Extract encoding from string
-						memcpy(text, &string[encoding_token+3], end_token-(encoding_token+3));		// Extract text
+						encoding=string[encoding_token+1];	/* Extract encoding from string */
+						memcpy(text, &string[encoding_token+3], end_token-(encoding_token+3));	/* Extract text */
 						text[end_token-(encoding_token+3)]=0x00;
 						decode=text;
-						if (encoding=='q' || encoding=='Q') {										// Decode 'q' encoded data
-							for(i=0;text[i]!=0x00;i++) if (text[i]=='_') text[i]=' ';							// Replace all *_' with space.
+						if (encoding=='q' || encoding=='Q') {	/* Decode 'q' encoded data */
+							for(i=0;text[i]!=0x00;i++) if (text[i]=='_') text[i]=' ';	/* Replace all *_' with space. */
 							decode = (char *) rfc822_qprint((unsigned char *) text, strlen(text), &newlength);
 						} else if (encoding=='b' || encoding=='B') {
-							decode = (char *) rfc822_base64((unsigned char *) text, strlen(text), &newlength); // Decode 'B' encoded data
+							decode = (char *) rfc822_base64((unsigned char *) text, strlen(text), &newlength); /* Decode 'B' encoded data */
 						}
 						MAKE_STD_ZVAL(myobject);
 						object_init(myobject);
@@ -3481,22 +3482,21 @@ PHP_FUNCTION(imap_mime_header_decode)
 						zend_hash_next_index_insert(return_value->value.ht,(void *)&myobject,sizeof(zval *),NULL);
 						fs_give((void**) &decode);
 						
-						offset+=end_token+2;
-						if (string[offset]==' ' && string[offset+1]=='=' && string[offset+2]=='?') {
-							offset++;	// Remove required space between encoded segments
-						}
-						continue;								// Iterate the loop again please.
+						offset=end_token+2;
+						for(i=0;(string[offset+i]==' ') || (string[offset+i]==0x0a) || (string[offset+i]==0x0d);i++);
+						if((string[offset+i]=='=') && (string[offset+i+1]=='?') && (offset+i<end)) offset+=i;
+						continue;	/*/ Iterate the loop again please. */
 					}
 				}
 			} else {
-				// Just some tweaking to optimize the code, and get the end statements work in a general manner.
-				// If we end up here we didn't find a position for "charset_token",
-				// so we need to set it to the start of the yet unextracted data.
+				/* Just some tweaking to optimize the code, and get the end statements work in a general manner.
+				   If we end up here we didn't find a position for "charset_token",
+				   so we need to set it to the start of the yet unextracted data. */
 				charset_token=offset;
 			}
-			// Return the rest of the data as unencoded, as it was either unencoded or was missing separators
-			// which rendered the the remainder of the string impossible for us to decode.
-			memcpy(text, &string[charset_token], end-charset_token);		// Extract unencoded text from string
+			/* Return the rest of the data as unencoded, as it was either unencoded or was missing separators
+			   which rendered the the remainder of the string impossible for us to decode. */
+			memcpy(text, &string[charset_token], end-charset_token);	/* Extract unencoded text from string */
 			text[end-charset_token]=0x00;
 			MAKE_STD_ZVAL(myobject);
 			object_init(myobject);
@@ -3504,7 +3504,7 @@ PHP_FUNCTION(imap_mime_header_decode)
 			add_property_string(myobject, "text", text, 1);
 			zend_hash_next_index_insert(return_value->value.ht,(void *)&myobject,sizeof(zval *),NULL);
 			
-			offset=end;	// We have reached the end of the string.
+			offset=end;	/* We have reached the end of the string. */
 		}
 		efree(charset);
 	} else {
@@ -3538,8 +3538,7 @@ void _php_imap_parse_address (ADDRESS *addresslist, char *fulladdress, zval *pad
 		} else {                                                  /* no */
 			ok = 0;                                               /* stop looping */
 			strcat(fulladdress, ", ..."); 
-		}
-		/* DO NOT optimize this out - changing it breaks things */
+		}		/* DO NOT optimize this out - changing it breaks things */
 		addresstmp->next = addresstmp2; /* reset the pointer to the next address first! */
 		addresstmp = addresstmp->next; 
 	}
-- 
2.40.0