From b9de54c8ef119e04cf1cc2631c056b46225ff87c Mon Sep 17 00:00:00 2001
From: shatty <shatty@nowhere.fake>
Date: Thu, 31 Jul 2003 00:04:53 +0000
Subject: [PATCH] written to use iconv.h

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4146 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kits/support/utf8_conversions.cpp | 47 ++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/src/kits/support/utf8_conversions.cpp b/src/kits/support/utf8_conversions.cpp
index b8684e336f..56cf738ca5 100644
--- a/src/kits/support/utf8_conversions.cpp
+++ b/src/kits/support/utf8_conversions.cpp
@@ -1,4 +1,11 @@
 #include <UTF8.h>
+#include <iconv.h>
+#include <CharacterSet.h>
+#include <CharacterSetRoster.h>
+#include <Errors.h>
+#include <errno.h>
+
+using namespace BPrivate;
 
 status_t
 convert_to_utf8(uint32 srcEncoding,
@@ -6,8 +13,24 @@ convert_to_utf8(uint32 srcEncoding,
                 char * dst, int32 * dstLen,
                 int32 * state, char substitute = B_SUBSTITUTE)
 {
-	// TODO: implement
-	return B_ERROR;
+	const BCharacterSet * charset = BCharacterSetRoster::GetCharacterSetByConversionID(srcEncoding);
+	if (charset == 0) {
+		return B_ERROR;
+	}	
+	iconv_t conversion = iconv_open("UTF-8",charset->GetName());
+	if (conversion == (iconv_t)-1) {
+		return B_ERROR;
+	}
+	const char ** inputBuffer = const_cast<const char**>(&src);
+	size_t charsLeft = *dstLen;
+	size_t inputLength = *srcLen;
+	size_t bytesLeft = iconv(conversion,inputBuffer,&inputLength,&dst,&charsLeft);
+	*srcLen = inputLength;
+	*dstLen -= charsLeft;
+	if ((bytesLeft != 0) && (errno != E2BIG) && (errno != EINVAL)) {
+		return B_ERROR;
+	}
+	return B_OK;
 }
 
 status_t
@@ -16,6 +39,22 @@ convert_from_utf8(uint32 dstEncoding,
                   char * dst, int32 * dstLen,
                   int32 * state, char substitute = B_SUBSTITUTE)
 {
-	// TODO: implement
-	return B_ERROR;
+	const BCharacterSet * charset = BCharacterSetRoster::GetCharacterSetByConversionID(dstEncoding);
+	if (charset == 0) {
+		return B_ERROR;
+	}	
+	iconv_t conversion = iconv_open(charset->GetName(),"UTF-8");
+	if (conversion == (iconv_t)-1) {
+		return B_ERROR;
+	}
+	const char ** inputBuffer = const_cast<const char**>(&src);
+	size_t charsLeft = *dstLen;
+	size_t inputLength = *srcLen;
+	size_t bytesLeft = iconv(conversion,inputBuffer,&inputLength,&dst,&charsLeft);
+	*srcLen = inputLength;
+	*dstLen -= charsLeft;
+	if ((bytesLeft != 0) && (errno != E2BIG) && (errno != EINVAL)) {
+		return B_ERROR;
+	}
+	return B_OK;
 }