common: Add helpers to read and write plist files

2 files changed, 106 insertions, 0 deletions

diff --git a/common/utils.c b/common/utils.c
index bd2bf1f..5248c2c 100644
--- a/common/utils.c
+++ b/common/utils.c
@@ -106,3 +106,91 @@ char *string_concat(const char *str, ...)
 
 	return result;
 }
+
+void buffer_read_from_filename(const char *filename, char **buffer, uint64_t *length)
+{
+	FILE *f;
+	uint64_t size;
+
+	*length = 0;
+
+	f = fopen(filename, "rb");
+	if (!f) {
+		return;
+	}
+
+	fseek(f, 0, SEEK_END);
+	size = ftell(f);
+	rewind(f);
+
+	if (size == 0) {
+		fclose(f);
+		return;
+	}
+
+	*buffer = (char*)malloc(sizeof(char)*(size+1));
+	fread(*buffer, sizeof(char), size, f);
+	fclose(f);
+
+	*length = size;
+}
+
+void buffer_write_to_filename(const char *filename, const char *buffer, uint64_t length)
+{
+	FILE *f;
+
+	f = fopen(filename, "ab");
+	if (!f)
+		f = fopen(filename, "wb");
+	if (f) {
+		fwrite(buffer, sizeof(char), length, f);
+		fclose(f);
+	}
+}
+
+int plist_read_from_filename(plist_t *plist, const char *filename)
+{
+	char *buffer = NULL;
+	uint64_t length;
+
+	if (!filename)
+		return 0;
+
+	buffer_read_from_filename(filename, &buffer, &length);
+
+	if (!buffer) {
+		return 0;
+	}
+
+	if ((length > 8) && (memcmp(buffer, "bplist00", 8) == 0)) {
+		plist_from_bin(buffer, length, plist);
+	} else {
+		plist_from_xml(buffer, length, plist);
+	}
+
+	free(buffer);
+
+	return 1;
+}
+
+int plist_write_to_filename(plist_t plist, const char *filename, enum plist_format_t format)
+{
+	char *buffer = NULL;
+	uint32_t length;
+
+	if (!plist || !filename)
+		return 0;
+
+	if (format == PLIST_FORMAT_XML)
+		plist_to_xml(plist, &buffer, &length);
+	else if (format == PLIST_FORMAT_BINARY)
+		plist_to_bin(plist, &buffer, &length);
+	else
+		return 0;
+
+	buffer_write_to_filename(filename, buffer, length);
+
+	free(buffer);
+
+	return 1;
+}
diff --git a/common/utils.h b/common/utils.h
index 441d188..8394272 100644
--- a/common/utils.h
+++ b/common/utils.h
@@ -22,9 +22,27 @@
 #ifndef __UTILS_H
 #define __UTILS_H
 
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+#include <stdio.h>
+#include <plist/plist.h>
+
 #ifndef HAVE_STPCPY
 char *stpcpy(char * s1, const char * s2);
 #endif
 char *string_concat(const char *str, ...);
 
+void buffer_read_from_filename(const char *filename, char **buffer, uint64_t *length);
+void buffer_write_to_filename(const char *filename, const char *buffer, uint64_t length);
+
+enum plist_format_t {
+	PLIST_FORMAT_XML,
+	PLIST_FORMAT_BINARY
+};
+
+int plist_read_from_filename(plist_t *plist, const char *filename);
+int plist_write_to_filename(plist_t plist, const char *filename, enum plist_format_t format);
+
 #endif