Add helper functions for reading/writing binary files.

examples/common.c

@@ -20,6 +20,12 @@
  */
 
 #include <string.h>
+#include <stdio.h>
+
+#ifdef _WIN32
+#include <io.h>
+#include <fcntl.h>
+#endif
 
 #include "common.h"
 #include "utils.h"
@@ -225,3 +231,62 @@ dctool_descriptor_search (dc_descriptor_t **out, const char *name, dc_family_t f
 
 	return DC_STATUS_SUCCESS;
 }
+
+void
+dctool_file_write (const char *filename, dc_buffer_t *buffer)
+{
+	FILE *fp = NULL;
+
+	// Open the file.
+	if (filename) {
+		fp = fopen (filename, "wb");
+	} else {
+		fp = stdout;
+#ifdef _WIN32
+		// Change from text mode to binary mode.
+		_setmode (_fileno (fp), _O_BINARY);
+#endif
+	}
+	if (fp == NULL)
+		return;
+
+	// Write the entire buffer to the file.
+	fwrite (dc_buffer_get_data (buffer), 1, dc_buffer_get_size (buffer), fp);
+
+	// Close the file.
+	fclose (fp);
+}
+
+dc_buffer_t *
+dctool_file_read (const char *filename)
+{
+	FILE *fp = NULL;
+
+	// Open the file.
+	if (filename) {
+		fp = fopen (filename, "rb");
+	} else {
+		fp = stdin;
+#ifdef _WIN32
+		// Change from text mode to binary mode.
+		_setmode (_fileno (fp), _O_BINARY);
+#endif
+	}
+	if (fp == NULL)
+		return NULL;
+
+	// Allocate a memory buffer.
+	dc_buffer_t *buffer = dc_buffer_new (0);
+
+	// Read the entire file into the buffer.
+	size_t n = 0;
+	unsigned char block[1024] = {0};
+	while ((n = fread (block, 1, sizeof (block), fp)) > 0) {
+		dc_buffer_append (buffer, block, n);
+	}
+
+	// Close the file.
+	fclose (fp);
+
+	return buffer;
+}

examples/common.h

@@ -45,6 +45,12 @@ dctool_event_cb (dc_device_t *device, dc_event_type_t event, const void *data, v
 dc_status_t
 dctool_descriptor_search (dc_descriptor_t **out, const char *name, dc_family_t family, unsigned int model);
 
+void
+dctool_file_write (const char *filename, dc_buffer_t *buffer);
+
+dc_buffer_t *
+dctool_file_read (const char *filename);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */