Tactical commit whilst converting to URL_FILE

src/io/fopen.h

@@ -0,0 +1,72 @@
+/*
+ * fopen.h
+ *
+ * adapted from https://curl.haxx.se/libcurl/c/fopen.html.
+ *
+ * Copyright (c) 2003, 2017 Simtec Electronics
+ * Some portions (c) 2017 Simon Brooke <simon@journeyman.cc>
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * This example requires libcurl 7.9.7 or later.
+ */
+
+#ifndef __fopen_h
+#define __fopen_h
+
+enum fcurl_type_e {
+  CFTYPE_NONE = 0,
+  CFTYPE_FILE = 1,
+  CFTYPE_CURL = 2
+};
+
+struct fcurl_data
+{
+  enum fcurl_type_e type;     /* type of handle */
+  union {
+    CURL *curl;
+    FILE *file;
+  } handle;                   /* handle */
+
+  char *buffer;               /* buffer to store cached data*/
+  size_t buffer_len;          /* currently allocated buffers length */
+  size_t buffer_pos;          /* end of data in buffer*/
+  int still_running;          /* Is background url fetch still in progress */
+};
+
+typedef struct fcurl_data URL_FILE;
+
+/* exported functions */
+URL_FILE *url_fopen(const char *url, const char *operation);
+int url_fclose(URL_FILE *file);
+int url_feof(URL_FILE *file);
+size_t url_fread(void *ptr, size_t size, size_t nmemb, URL_FILE *file);
+char *url_fgets(char *ptr, size_t size, URL_FILE *file);
+void url_rewind(URL_FILE *file);
+
+wint_t url_fgetwc(URL_FILE *file);
+URL_FILE * file_to_url_file( FILE* f);
+
+
+
+#endif