1844         result = filename;  /* neither file separator was found so basename is the whole filename */  in arg_basename()
1854 /* Returns ptr to the file extension within *basename */
1855 static const char * arg_extension(const char *basename)  in arg_extension()  argument
1857     /* find the last occurrence of '.' in basename */  in arg_extension()
1858     const char *result = (basename ? strrchr(basename, '.') : NULL);  in arg_extension()
1860     /* if no '.' was found then return pointer to end of basename */  in arg_extension()
1861     if (basename && !result)  in arg_extension()
1862         result = basename + strlen(basename);  in arg_extension()
1865     if (basename && result == basename)  in arg_extension()
1866         result = basename + strlen(basename);  in arg_extension()
1869     if (basename && result && result[1] == '\0')  in arg_extension()
1870         result = basename + strlen(basename);  in arg_extension()
1895         parent->basename[parent->count]  = arg_basename(argval);  in arg_file_scanfn()
1897 …arg_extension(parent->basename[parent->count]);                                /* only seek extens…  in arg_file_scanfn()
1984              + sizeof(char *) * maxcount  /* storage for basename[maxcount] array */  in arg_filen()
2006         /* store the filename,basename,extension arrays immediately after the arg_file struct */  in arg_filen()
2008         result->basename  = result->filename + maxcount;  in arg_filen()
2009         result->extension = result->basename + maxcount;  in arg_filen()
2016             result->basename[i] = "";  in arg_filen()