+char *getImg2(char *, char *);
+char *getImg3(char *, char *, char*);
+char *getStringCopy(const char *);
+char *getStringCopyN(const char *, int);
+char *getStringCopyNStatic(const char *, int);
+char *getStringToLower(const char *);
+void setString(char **, char *);
+boolean strEqual(char *, char *);
+boolean strEqualN(char *, char *, int);
+boolean strPrefix(char *, char *);
+boolean strSuffix(char *, char *);
+boolean strPrefixLower(char *, char *);
+boolean strSuffixLower(char *, char *);
+
+void GetOptions(int, char **,
+ void (*print_usage_function)(void),
+ void (*print_version_function)(void));
+
+void *checked_malloc(unsigned int);
+void *checked_calloc(unsigned int);
+void *checked_realloc(void *, unsigned int);
+void checked_free(void *);
+void clear_mem(void *, unsigned int);