Remove parameter m_data_sub_dir (#1356)

This further simplifies the finding of the tessdata directory.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

ccutil/ccutil.cpp

@@ -15,8 +15,6 @@
 namespace tesseract {
 CCUtil::CCUtil() :
   params_(),
-  STRING_INIT_MEMBER(m_data_sub_dir,
-                     "tessdata/", "Directory for data files", &params_),
 #ifdef _WIN32
   STRING_INIT_MEMBER(tessedit_module_name, WINDLLNAME,
                      "Module colocated with tessdata dir", &params_),

ccutil/ccutil.h

@@ -77,7 +77,6 @@ class CCUtil {
   // Member parameters.
   // These have to be declared and initialized after params_ member, since
   // params_ should be initialized before parameters are added to it.
-  STRING_VAR_H(m_data_sub_dir, "tessdata/", "Directory for data files");
   #ifdef _WIN32
   STRING_VAR_H(tessedit_module_name, WINDLLNAME,
                "Module colocated with tessdata dir");

ccutil/mainblk.cpp

@@ -77,7 +77,7 @@ void CCUtil::main_setup(const char *argv0, const char *basename) {
 /* Use tessdata prefix which was compiled in. */
 #define _STR(a) #a
 #define _XSTR(a) _STR(a)
-    datadir = _XSTR(TESSDATA_PREFIX);
+    datadir = _XSTR(TESSDATA_PREFIX) "/tessdata";
 #undef _XSTR
 #undef _STR
 #endif
@@ -86,21 +86,12 @@ void CCUtil::main_setup(const char *argv0, const char *basename) {
   // datadir may still be empty:
   if (datadir.length() == 0) {
     datadir = "./";
-  } else {
-    // Remove tessdata from the end if present, as we will add it back!
-    int length = datadir.length();
-    if (length >= 8 && strcmp(&datadir[length - 8], "tessdata") == 0)
-      datadir.truncate_at(length - 8);
-    else if (length >= 9 && strcmp(&datadir[length - 9], "tessdata/") == 0)
-      datadir.truncate_at(length - 9);
   }
 
   // check for missing directory separator
   const char *lastchar = datadir.string();
   lastchar += datadir.length() - 1;
   if ((strcmp(lastchar, "/") != 0) && (strcmp(lastchar, "\\") != 0))
     datadir += "/";
-
-  datadir += m_data_sub_dir;     /**< data directory */
 }
 }  // namespace tesseract