From 727ede3aba8ce7831d649043ef1360d5d718b2d0 Mon Sep 17 00:00:00 2001
From: Michael Tryby <tryby.michael@epa.gov>
Date: Thu, 28 Mar 2019 17:28:02 -0400
Subject: [PATCH] Initial commit

filemanager
---
 src/util/filemanager.c | 89 ++++++++++++++++++++++++++++++++++++++++++
 src/util/filemanager.h | 44 +++++++++++++++++++++
 2 files changed, 133 insertions(+)
 create mode 100644 src/util/filemanager.c
 create mode 100644 src/util/filemanager.h

diff --git a/src/util/filemanager.c b/src/util/filemanager.c
new file mode 100644
index 0000000..f2fcc8f
--- /dev/null
+++ b/src/util/filemanager.c
@@ -0,0 +1,89 @@
+
+
+#include <stdio.h>
+#include <string.h>
+
+#include "filemanager.h"
+
+
+// local (private) functions
+int _get_temp_filename(char *tempname);
+
+
+file_handle_t *create_file_manager(const char *filename, const char *file_mode) {
+
+    file_handle_t *file_handle;
+    file_handle = (file_handle_t*)calloc(1, sizeof(file_handle_t));
+
+    if (filename == NULL)
+        _get_temp_filename(file_handle->filename);
+    else
+        strncpy(file_handle->filename, filename, FILE_MAXNAME);
+
+    file_handle->file = NULL;
+    strncpy(file_handle->mode, file_mode, FILE_MAXMODE);
+
+    return file_handle;
+}
+
+int delete_file_manager(file_handle_t *file_handle) {
+    free(file_handle);
+}
+
+
+int open_file(file_handle_t *file_handle) {
+    int error = 0;
+
+    if ((file_handle->file = fopen(file_handle->filename, file_handle->mode)) == NULL)
+        error = -1;
+
+    return error;
+}
+
+FILE *get_file(file_handle_t *file_handle) {
+    return file_handle->file;
+}
+
+int close_file(file_handle_t *file_handle) {
+    int error = 0;
+
+    if (file_handle->file != NULL) {
+        error = fclose(file_handle->file);
+        file_handle->file = NULL;
+    }
+    return error;
+}
+
+int remove_file(file_handle_t *file_handle) {
+    return remove(file_handle->filename);
+}
+
+
+int _get_temp_filename(char *tempname) {
+    int error = 0
+#ifdef _WIN32
+    char* name = NULL;
+
+    // --- use Windows _tempnam function to get a pointer to an
+    //     unused file name that begins with "en"
+    if ((name = _tempnam(NULL, "en") == NULL) {
+        error = -1;
+        return error;
+    }
+    else if (strlen(name) < FILE_MAXNAME)
+        strncpy(tempname, name, FILE_MAXNAME);
+    else
+        tempname = NULL;
+
+    // --- free the pointer returned by _tempnam
+    if (name)
+        free(name);
+
+    // --- for non-Windows systems:
+#else
+    // --- use system function mkstemp() to create a temporary file name
+    strncpy(tempname, "enXXXXXX", 8);
+    error = mkstemp(tempname);
+#endif
+    return error;
+}
diff --git a/src/util/filemanager.h b/src/util/filemanager.h
new file mode 100644
index 0000000..24c8b55
--- /dev/null
+++ b/src/util/filemanager.h
@@ -0,0 +1,44 @@
+
+
+
+
+#ifndef FILEMANAGER_H_
+#define FILEMANAGER_H_
+
+
+#include <stdio.h>
+
+#define FILE_MAXNAME 259
+#define FILE_MAXMODE 3
+
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+typedef struct file_s {
+    char filename[FILE_MAXNAME + 1],
+    FILE *file;
+    char  mode[FILE_MAXMODE + 1];
+} file_handle_t;
+
+
+file_handle_t *create_file_manager(const char *filename, const char *file_mode);
+
+int delete_file_manager(file_handle_t *file_handle);
+
+
+int open_file(file_handle_t *file_handle);
+
+FILE *get_file(file_handle_t *file_handle);
+
+int close_file(file_handle_t *file_handle);
+
+
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* FILEMANAGER_H_ */