mraa.c: change helper functions to use const char*

Signed-off-by: Michael Ring <mail@michael-ring.org>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

diff --git a/include/mraa_internal.h b/include/mraa_internal.h
index 0e4c78d..78900e9 100644 (file)
--- a/include/mraa_internal.h
+++ b/include/mraa_internal.h
@@ -65,7 +65,7 @@ mraa_platform_t mraa_arm_platform();
 * @param filename to check
 * @return mraa_boolean_t boolean result.
 */
-mraa_boolean_t mraa_file_exist(char *filename);
+mraa_boolean_t mraa_file_exist(const char* filename);
 
 /**
 * helper function to unglob filenames
@@ -73,7 +73,7 @@ mraa_boolean_t mraa_file_exist(char *filename);
 * @param filename to unglob
 * @return char * with the existing filename matching the pattern of input. NULL if there is no match. Caller must free result
 */
-char * mraa_file_unglob(char *filename);
+char* mraa_file_unglob(const char* filename);
 
 /**
 * helper function to find out if file that is targeted by a softlink (partially) matches the given name
@@ -82,7 +82,7 @@ char * mraa_file_unglob(char *filename);
 * @param (partial) filename that is matched with the filename of the link-targeted file
 * @return mraa_boolean_t true when targetname (partially) matches
 */
-mraa_boolean_t mraa_link_targets(char *filename,char *targetname);
+mraa_boolean_t mraa_link_targets(const char* filename, const char* targetname);
 
 #ifdef __cplusplus
 }

diff --git a/src/mraa.c b/src/mraa.c
index 890d711..532eb17 100644 (file)
--- a/src/mraa.c
+++ b/src/mraa.c
@@ -312,7 +312,7 @@ mraa_get_pin_count()
 }
 
 mraa_boolean_t
-mraa_file_exist(char* filename)
+mraa_file_exist(const char* filename)
 {
     glob_t results;
     results.gl_pathc = 0;
@@ -334,7 +334,7 @@ mraa_get_pin_name(int pin)
 }
 
 char*
-mraa_file_unglob(char* filename)
+mraa_file_unglob(const char* filename)
 {
     glob_t results;
     char* res = NULL;
@@ -347,7 +347,7 @@ mraa_file_unglob(char* filename)
 }
 
 mraa_boolean_t
-mraa_link_targets(char* filename, char* targetname)
+mraa_link_targets(const char* filename, const char* targetname)
 {
     int size = 100;
     int nchars = 0;