# HG changeset patch
# User Olaf Wintermann <olaf.wintermann@gmail.com>
# Date 1528480697 -7200
# Node ID 0b9bea2d72831d9946b010fdd0880d0b09cfb288
# Parent  90a6d6952d83f38aba01fe445bbe4f70909f9944
adds file io abstraction functions

diff -r 90a6d6952d83 -r 0b9bea2d7283 dav/Makefile
--- a/dav/Makefile	Sun Jun 03 16:05:49 2018 +0200
+++ b/dav/Makefile	Fri Jun 08 19:58:17 2018 +0200
@@ -36,6 +36,7 @@
 DAV_SRC += error.c
 DAV_SRC += assistant.c
 DAV_SRC += tar.c
+DAV_SRC += system.c
 
 SYNC_SRC = sync.c
 SYNC_SRC += config.c
@@ -46,6 +47,7 @@
 SYNC_SRC += assistant.c
 SYNC_SRC += libxattr.c
 SYNC_SRC += tags.c
+SYNC_SRC += system.c
 
 DAV_OBJ = $(DAV_SRC:%.c=../build/tool/%$(OBJ_EXT))
 SYNC_OBJ = $(SYNC_SRC:%.c=../build/tool/%$(OBJ_EXT))
diff -r 90a6d6952d83 -r 0b9bea2d7283 dav/main.c
--- a/dav/main.c	Sun Jun 03 16:05:49 2018 +0200
+++ b/dav/main.c	Fri Jun 08 19:58:17 2018 +0200
@@ -45,6 +45,7 @@
 #include "config.h"
 #include "error.h"
 #include "assistant.h"
+#include "system.h"
 #include "main.h"
 
 static DavContext *ctx;
@@ -890,8 +891,8 @@
     
     int isstdout = !strcmp(out, "-");
     if(cmd_getoption(a, "keep") && !isstdout) {
-        struct stat s;
-        if(stat(out, &s)) {
+        SYS_STAT s;
+        if(sys_stat(out, &s)) {
             if(errno != ENOENT) {
                 perror("stat");
             }
@@ -908,7 +909,7 @@
         printf("get: %s\n", res->path);
     }
     
-    FILE *fout = isstdout ? stdout : fopen(out, "wb");
+    FILE *fout = isstdout ? stdout : sys_fopen(out, "wb");
     if(!fout) {
         fprintf(stderr, "cannot open output file\n");
         return -1;
diff -r 90a6d6952d83 -r 0b9bea2d7283 dav/system.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dav/system.c	Fri Jun 08 19:58:17 2018 +0200
@@ -0,0 +1,183 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2018 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+
+#include "system.h"
+
+void sys_freedirent(SysDirEnt *ent) {
+    free(ent->name);
+    free(ent);
+}
+
+#ifndef _WIN32
+/* ---------- POSIX implementation ---------- */
+
+SYS_DIR sys_opendir(const char *path) {
+    return opendir(path);
+}
+
+SysDirEnt* sys_readdir(SYS_DIR dir) {
+    struct dirent *ent = readdir(dir);
+    if(ent) {
+        SysDirEnt *e = malloc(sizeof(SysDirEnt));
+        e->name = strdup(ent->d_name);
+        return e;
+    }
+    return NULL;
+}
+
+void sys_closedir(SYS_DIR dir) {
+    closedir(dir);
+}
+
+FILE* sys_fopen(const char *path, const char *mode) {
+    return fopen(path, mode);
+}
+
+int sys_stat(const char *path, SYS_STAT *s) {
+    return stat(path, s);
+}
+
+
+#else
+/* ---------- Windows implementation ---------- */
+
+static wchar_t* path2winpath(const char *path, int dir, int *newlen) {
+    size_t len = strlen(path);
+    size_t lenadd = dir ? 2 : 0;
+    
+    
+    wchar_t *wpath = calloc(len+lenadd, sizeof(wchar_t));
+    int wlen = MultiByteToWideChar(
+            CP_UTF8,
+            0,
+            path,
+            len,
+            wpath,
+            len+1
+            );
+    if(newlen) {
+        *newlen = wlen;
+    }
+    for(int i=0;i<wlen;i++) {
+        if(wpath[i] == L'/') {
+            wpath[i] = L'\\';
+        }
+    }
+    
+    if(dir) {
+        if(wpath[wlen-1] != L'\\') {
+            wpath[wlen++] = L'\\';
+        }
+        wpath[wlen++] = L'*';
+    }
+    wpath[wlen] = 0;
+    
+    return wpath;
+} 
+
+SYS_DIR sys_opendir(const char *path) {
+    struct WinDir *dir = malloc(sizeof(struct WinDir));
+    wchar_t *dirpath = path2winpath(path, TRUE, NULL);
+    if(!dirpath) {
+        fprintf(stderr, "Cannot convert path \"%s\" to UTF16\n", path);
+        free(dir);
+        return NULL;
+    }
+    dir->first = 1;
+    dir->handle = FindFirstFileW(dirpath, &dir->finddata);
+    free(dirpath);
+    if(dir->handle == INVALID_HANDLE_VALUE) {
+        free(dir);
+        return NULL;
+    }
+    return dir;
+}
+
+SysDirEnt* sys_readdir(SYS_DIR dir) {
+    if(dir->first) {
+        dir->first = 0;
+    } else {
+        if(FindNextFileW(dir->handle, &dir->finddata) == 0) {
+            return NULL;
+        }
+    }
+    
+    size_t namelen = wcslen(dir->finddata.cFileName);
+    
+    char *name = malloc((namelen+1)*4);
+    int nlen = WideCharToMultiByte(
+            CP_UTF8,
+            0,
+            dir->finddata.cFileName,
+            -1,
+            name,
+            256,
+            NULL,
+            NULL);
+    if(nlen > 0) {
+        name[nlen] = 0;
+        SysDirEnt *ent = malloc(sizeof(SysDirEnt));
+        ent->name = name;
+        return ent;
+    } else {
+        return NULL;
+    }
+}
+
+void sys_closedir(SYS_DIR dir) {
+    FindClose(dir->handle);
+    free(dir);
+}
+
+FILE* sys_fopen(const char *path, const char *mode) {
+    wchar_t *fpath = path2winpath(path, FALSE, NULL); 
+    wchar_t *fmode = path2winpath(mode, FALSE, NULL);
+    
+    FILE *file = (fpath && fmode) ? _wfopen(fpath, fmode) : NULL;
+    free(fpath);
+    free(fmode);
+    return file;
+}
+
+int sys_stat(const char *path, SYS_STAT *s) {
+    wchar_t *fpath = path2winpath(path, FALSE, NULL);
+    if(!fpath) {
+        fprintf(stderr, "Cannot convert path \"%s\" to UTF16\n", path);
+        return -1;
+    }
+    int ret = _wstat64(fpath, s);
+    free(fpath);
+    return ret;
+}
+
+#endif
\ No newline at end of file
diff -r 90a6d6952d83 -r 0b9bea2d7283 dav/system.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dav/system.h	Fri Jun 08 19:58:17 2018 +0200
@@ -0,0 +1,75 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2018 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef DAV_SYSTEM_H
+#define DAV_SYSTEM_H
+
+#include <stdio.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+
+#ifdef _WIN32
+#include <Windows.h>
+struct WinDir {
+    int first;
+    HANDLE handle;
+    WIN32_FIND_DATAW finddata;
+};
+#define SYS_DIR struct WinDir*
+#define SYS_STAT struct __stat64
+
+#else
+#define SYS_DIR DIR*
+#define SYS_STAT struct stat
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct SysDirEnt {
+    char *name;
+} SysDirEnt;
+
+void sys_freedirent(SysDirEnt *ent);
+SYS_DIR sys_opendir(const char *path);
+SysDirEnt* sys_readdir(SYS_DIR dir);
+void sys_closedir(SYS_DIR dir);
+
+FILE* sys_fopen(const char *path, const char *mode);
+
+int sys_stat(const char *path, SYS_STAT *s);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* DAV_SYSTEM_H */
+