common: Share idevicebackup helper string_build_path() from utils

2 files changed, 30 insertions, 0 deletions

diff --git a/common/utils.c b/common/utils.c
index 4465490..fb6822f 100644
--- a/common/utils.c
+++ b/common/utils.c
@@ -29,6 +29,7 @@
 #include <time.h>
 #include <sys/time.h>
 #include <inttypes.h>
+#include <ctype.h>
 
 #include "utils.h"
 
@@ -110,6 +111,34 @@ char *string_concat(const char *str, ...)
 	return result;
 }
 
+char *string_build_path(const char *elem, ...)
+{
+	if (!elem)
+		return NULL;
+	va_list args;
+	int len = strlen(elem)+1;
+	va_start(args, elem);
+	char *arg = va_arg(args, char*);
+	while (arg) {
+		len += strlen(arg)+1;
+		arg = va_arg(args, char*);
+	}
+	va_end(args);
+
+	char* out = (char*)malloc(len);
+	strcpy(out, elem);
+
+	va_start(args, elem);
+	arg = va_arg(args, char*);
+	while (arg) {
+		strcat(out, "/");
+		strcat(out, arg);
+		arg = va_arg(args, char*);
+	}
+	va_end(args);
+	return out;
+}
+
 static int get_rand(int min, int max)
 {
 	int retval = (rand() % (max - min)) + min;
diff --git a/common/utils.h b/common/utils.h
index 388a793..96e6ba2 100644
--- a/common/utils.h
+++ b/common/utils.h
@@ -37,6 +37,7 @@
 char *stpcpy(char *s1, const char *s2);
 #endif
 char *string_concat(const char *str, ...);
+char *string_build_path(const char *elem, ...);
 char *generate_uuid();
 
 void buffer_read_from_filename(const char *filename, char **buffer, uint64_t *length);