4 files changed, 11 insertions, 11 deletions
diff --git a/core/dive.c b/core/dive.c
index 72abee41e..58b92b5cc 100644
--- a/core/dive.c
+++ b/core/dive.c
@@ -3603,7 +3603,7 @@ struct picture *alloc_picture()
 	return pic;
 }
 
-static bool new_picture_for_dive(struct dive *d, char *filename)
+static bool new_picture_for_dive(struct dive *d, const char *filename)
 {
 	FOR_EACH_PICTURE (d) {
 		if (same_string(picture->filename, filename))
@@ -3628,7 +3628,7 @@ bool dive_check_picture_time(struct dive *d, int shift_time, timestamp_t timesta
 	return false;
 }
 
-bool picture_check_valid(char *filename, int shift_time)
+bool picture_check_valid(const char *filename, int shift_time)
 {
 	int i;
 	struct dive *dive;
@@ -3640,7 +3640,7 @@ bool picture_check_valid(char *filename, int shift_time)
 	return false;
 }
 
-void dive_create_picture(struct dive *dive, char *filename, int shift_time, bool match_all)
+void dive_create_picture(struct dive *dive, const char *filename, int shift_time, bool match_all)
 {
 	timestamp_t timestamp = picture_get_timestamp(filename);
 	if (!new_picture_for_dive(dive, filename))
diff --git a/core/dive.h b/core/dive.h
index 4608e9d71..ecb3240c1 100644
--- a/core/dive.h
+++ b/core/dive.h
@@ -400,13 +400,13 @@ struct picture {
 extern struct picture *alloc_picture();
 extern struct picture *clone_picture(struct picture *src);
 extern bool dive_check_picture_time(struct dive *d, int shift_time, timestamp_t timestamp);
-extern void dive_create_picture(struct dive *d, char *filename, int shift_time, bool match_all);
+extern void dive_create_picture(struct dive *d, const char *filename, int shift_time, bool match_all);
 extern void dive_add_picture(struct dive *d, struct picture *newpic);
 extern void dive_remove_picture(char *filename);
 extern unsigned int dive_get_picture_count(struct dive *d);
-extern bool picture_check_valid(char *filename, int shift_time);
+extern bool picture_check_valid(const char *filename, int shift_time);
 extern void picture_load_exif_data(struct picture *p);
-extern timestamp_t picture_get_timestamp(char *filename);
+extern timestamp_t picture_get_timestamp(const char *filename);
 extern void dive_set_geodata_from_picture(struct dive *d, struct picture *pic);
 extern void picture_free(struct picture *picture);
 
diff --git a/core/qthelper.cpp b/core/qthelper.cpp
index 39461c7eb..eb68fe206 100644
--- a/core/qthelper.cpp
+++ b/core/qthelper.cpp
@@ -352,7 +352,7 @@ extern "C" xsltStylesheetPtr get_stylesheet(const char *name)
 }
 
 
-extern "C" timestamp_t picture_get_timestamp(char *filename)
+extern "C" timestamp_t picture_get_timestamp(const char *filename)
 {
 	easyexif::EXIFInfo exif;
 	memblock mem;
@@ -999,7 +999,7 @@ QMutex hashOfMutex;
 QHash<QByteArray, QString> localFilenameOf;
 QHash <QString, QImage > thumbnailCache;
 
-extern "C" char * hashstring(char * filename)
+extern "C" char * hashstring(const char *filename)
 {
 	QMutexLocker locker(&hashOfMutex);
 	return hashOf[QString(filename)].toHex().data();
@@ -1084,7 +1084,7 @@ void learnHash(struct picture *picture, QByteArray hash)
 	picture->hash = strdup(hash.toHex());
 }
 
-bool haveHash(QString &filename)
+bool haveHash(const QString &filename)
 {
 	QMutexLocker locker(&hashOfMutex);
 	return hashOf.contains(filename);
@@ -1100,7 +1100,7 @@ QString localFilePath(const QString originalFilename)
 		return originalFilename;
 }
 
-QString fileFromHash(char *hash)
+QString fileFromHash(const char *hash)
 {
 	if (!hash || !*hash)
 		return "";
diff --git a/core/qthelper.h b/core/qthelper.h
index 4d39ad368..24215d43f 100644
--- a/core/qthelper.h
+++ b/core/qthelper.h
@@ -27,7 +27,7 @@ void learnImages(const QDir dir, int max_recursions);
 void add_hash(const QString filename, QByteArray hash);
 void hashPicture(struct picture *picture);
 QString localFilePath(const QString originalFilename);
-QString fileFromHash(char *hash);
+QString fileFromHash(const char *hash);
 void learnHash(struct picture *picture, QByteArray hash);
 extern "C" void cache_picture(struct picture *picture);
 weight_t string_to_weight(const char *str);