[libxml2] OS400: UTF8<-->EBCDIC wrappers for system and external library calls

[Daniel Veillard <veillard src gnome org>]

commit 6e4d870336a3d892bf5833dc7685c11d64f1d008
Author: Patrick Monnerat <pm datasphere ch>
Date:   Tue Mar 4 17:11:02 2014 +0100

    OS400: UTF8<-->EBCDIC wrappers for system and external library calls

 os400/wrappers.c |  170 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 os400/wrappers.h |   70 ++++++++++++++++++++++
 2 files changed, 240 insertions(+), 0 deletions(-)
---
diff --git a/os400/wrappers.c b/os400/wrappers.c
new file mode 100644
index 0000000..9f592b7
--- /dev/null
+++ b/os400/wrappers.c
@@ -0,0 +1,170 @@
+/**
+***     UTF-8/EBCDIC wrappers to system and C library procedures.
+***
+***     See Copyright for the status of this software.
+***
+***     Author: Patrick Monnerat <pm datasphere ch>, DATASPHERE S.A.
+**/
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+#include <netdb.h>
+#include <errno.h>
+
+#include "config.h"
+
+#include "libxml/xmlmemory.h"
+
+#include "transcode.h"
+
+
+static const char *     lxdles = NULL;
+
+
+int
+_lx_getaddrinfo(const char * node, const char * service,
+        const struct addrinfo * hints, struct addrinfo * * res)
+
+{
+        xmlDictPtr d = NULL;
+        int i;
+
+        i = getaddrinfo(xmlTranscodeResult(node, NULL, &d, NULL),
+            xmlTranscodeResult(service, NULL, &d, NULL), hints, res);
+        xmlZapDict(&d);
+        return i;
+}
+
+
+const char *
+_lx_inet_ntop(int af, const void * src, char * dst, socklen_t size)
+
+{
+        const char * cp1 = inet_ntop(af, src, dst, size);
+        char const * cp2;
+        int i;
+
+        if (!cp1)
+                return cp1;
+
+        if (!(cp2 = xmlTranscodeString(cp1, NULL, NULL)))
+                return cp2;
+
+        i = strlen(cp2);
+
+        if (i >= size) {
+                xmlFree((char *) cp2);
+                errno = ENOSPC;
+                return (const char *) NULL;
+                }
+
+        memcpy(dst, cp2, i + 1);
+        xmlFree((char *) cp2);
+        return dst;
+}
+
+
+void *
+_lx_dlopen(const char * filename, int flag)
+
+{
+        xmlDictPtr d = NULL;
+        void * result;
+
+        result = dlopen(xmlTranscodeResult(filename, NULL, &d, NULL), flag);
+        xmlZapDict(&d);
+        return result;
+}
+
+
+void *
+_lx_dlsym(void * handle, const char * symbol)
+
+{
+        xmlDictPtr d = NULL;
+        void * result;
+
+        result = dlsym(handle, xmlTranscodeResult(symbol, NULL, &d, NULL));
+        xmlZapDict(&d);
+        return result;
+}
+
+
+char *
+_lx_dlerror(void)
+
+{
+        char * cp1 = (char *) dlerror();
+
+        if (!cp1)
+                return cp1;
+
+        if (lxdles)
+                xmlFree((char *) lxdles);
+
+        lxdles = (const char *) xmlTranscodeString(cp1, NULL, NULL);
+        return (char *) lxdles;
+}
+
+
+#ifdef HAVE_ZLIB_H
+#include <zlib.h>
+
+gzFile
+_lx_gzopen(const char * path, const char * mode)
+
+{
+        xmlDictPtr d = NULL;
+        gzFile f;
+
+        f = gzopen(xmlTranscodeResult(path, NULL, &d, NULL),
+            xmlTranscodeResult(mode, NULL, &d, NULL));
+        xmlZapDict(&d);
+        return f;
+}
+
+
+gzFile
+_lx_gzdopen(int fd, const char * mode)
+
+{
+        xmlDictPtr d = NULL;
+        gzFile f;
+
+        f = gzdopen(fd, xmlTranscodeResult(mode, NULL, &d, NULL));
+        xmlZapDict(&d);
+        return f;
+}
+
+int
+_lx_inflateInit2_(z_streamp strm, int windowBits,
+                                        const char * version, int stream_size)
+
+{
+        xmlDictPtr d = NULL;
+        int r;
+
+        r = inflateInit2_(strm, windowBits,
+            xmlTranscodeResult(version, NULL, &d, NULL), stream_size);
+        xmlZapDict(&d);
+        return r;
+}
+
+int
+_lx_deflateInit2_(z_streamp strm, int level, int method, int windowBits,
+        int memLevel, int strategy, const char * version, int stream_size)
+
+{
+        xmlDictPtr d = NULL;
+        int r;
+
+        r = deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+            xmlTranscodeResult(version, NULL, &d, NULL), stream_size);
+        xmlZapDict(&d);
+        return r;
+}
+
+#endif
diff --git a/os400/wrappers.h b/os400/wrappers.h
new file mode 100644
index 0000000..388ec8c
--- /dev/null
+++ b/os400/wrappers.h
@@ -0,0 +1,70 @@
+/**
+***     Replace system/C library calls by EBCDIC wrappers.
+***     This is a layer inserted between libxml2 itself and the EBCDIC
+***             environment.
+***
+***     See Copyright for the status of this software.
+***
+***     Author: Patrick Monnerat <pm datasphere ch>, DATASPHERE S.A.
+**/
+
+#ifndef __WRAPPERS_H_
+#define __WRAPPERS_H_
+
+/**
+***     OS/400 specific defines.
+**/
+
+#define __cplusplus__strings__
+
+/**
+***     Force header inclusions before renaming procedures to UTF-8 wrappers.
+**/
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include "dlfcn.h"
+
+
+/**
+***     UTF-8 wrappers prototypes.
+**/
+
+extern int      _lx_getaddrinfo(const char * node, const char * service,
+                        const struct addrinfo * hints, struct addrinfo * * res);
+extern const char *
+                _lx_inet_ntop(int af,
+                        const void * src, char * dst, socklen_t size);
+extern void *   _lx_dlopen(const char * filename, int flag);
+extern void *   _lx_dlsym(void * handle, const char * symbol);
+extern char *   _lx_dlerror(void);
+
+
+#ifdef HAVE_ZLIB_H
+
+#include <zlib.h>
+
+extern gzFile   _lx_gzopen(const char * path, const char * mode);
+extern gzFile   _lx_gzdopen(int fd, const char * mode);
+
+#endif
+
+
+/**
+***     Rename data/procedures to UTF-8 wrappers.
+**/
+
+#define getaddrinfo     _lx_getaddrinfo
+#define inet_ntop       _lx_inet_ntop
+#define dlopen          _lx_dlopen
+#define dlsym           _lx_dlsym
+#define dlerror         _lx_dlerror
+#define gzopen          _lx_gzopen
+#define gzdopen         _lx_gzdopen
+#define inflateInit2_   _lx_inflateInit2_
+#define deflateInit2_   _lx_deflateInit2_
+
+#endif