ENH: update .y file with borland fix, and use a table based strcasecmp

Source/cmDependsFortranParser.cxx

@@ -183,7 +183,6 @@ Modify cmDependsFortranParser.cxx:
 #define cmDependsFortranParser_cxx
 #include "cmDependsFortranParser.h" /* Interface to parser object.  */
 #include "cmDependsFortranParserTokens.h" /* Need YYSTYPE for YY_DECL.  */
-#include <ctype.h> // for tolower
 
 /* Configure the parser to use a lexer object.  */
 #define YYPARSE_PARAM yyscanner
@@ -202,22 +201,60 @@ static void cmDependsFortranError(yyscan_t yyscanner, const char* message)
   cmDependsFortranParser_Error(parser, message);
 }
 
-static bool cmDependsFortranParserIsKeyword(const char* word,
-                                            const char* keyword)
+
+static char charmap[] = {
+    '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
+    '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
+    '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
+    '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
+    '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
+    '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
+    '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
+    '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
+    '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+    '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+    '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+    '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
+    '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+    '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+    '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+    '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
+    '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
+    '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
+    '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
+    '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
+    '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
+    '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
+    '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
+    '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
+    '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
+    '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
+    '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
+    '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
+    '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
+    '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
+    '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
+    '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377'
+};
+
+inline int strcasecmpCM(const char *s1, const char *s2) 
 {
-  size_t len = strlen(word);
-  if (len != strlen(keyword))
-    {
-    return false;
-    }
-  for (size_t i = 0; i < len; ++i)
-    {
-    if (tolower(word[i]) != tolower(keyword[i]))
+  const char *cm = charmap;
+  const char* us1 = s1;
+  const char* us2 = s2;
+  
+  while(cm[*us1] == cm[*us2++])
+    if(*us1++ == '\0') 
       {
-      return false;
+      return(0);
       }
-    }
-  return true;
+  return(cm[*us1] - cm[*--us2]);
+}
+
+static bool cmDependsFortranParserIsKeyword(const char* word,
+                                            const char* keyword)
+{
+  return strcasecmpCM(word, keyword) == 0;
 }
 
 /* Disable some warnings in the generated code.  */

Source/cmDependsFortranParser.y

@@ -44,7 +44,6 @@ Modify cmDependsFortranParser.cxx:
 #define cmDependsFortranParser_cxx
 #include "cmDependsFortranParser.h" /* Interface to parser object.  */
 #include "cmDependsFortranParserTokens.h" /* Need YYSTYPE for YY_DECL.  */
-#include "cmSystemTools.h"
 
 /* Configure the parser to use a lexer object.  */
 #define YYPARSE_PARAM yyscanner
@@ -63,11 +62,59 @@ static void cmDependsFortranError(yyscan_t yyscanner, const char* message)
   cmDependsFortranParser_Error(parser, message);
 }
 
+static char charmap[] = {
+    '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
+    '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
+    '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
+    '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
+    '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
+    '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
+    '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
+    '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
+    '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+    '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+    '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+    '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
+    '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+    '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+    '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+    '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
+    '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
+    '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
+    '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
+    '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
+    '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
+    '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
+    '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
+    '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
+    '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
+    '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
+    '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
+    '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
+    '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
+    '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
+    '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
+    '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377'
+};
+
+inline int strcasecmpCM(const char *s1, const char *s2) 
+{
+  const char *cm = charmap;
+  const char* us1 = s1;
+  const char* us2 = s2;
+  
+  while(cm[*us1] == cm[*us2++])
+    if(*us1++ == '\0') 
+      {
+      return(0);
+      }
+  return(cm[*us1] - cm[*--us2]);
+}
+
 static bool cmDependsFortranParserIsKeyword(const char* word,
                                             const char* keyword)
 {
-  return (strlen(word) == strlen(keyword) &&
-          cmSystemTools::LowerCase(word) == keyword);
+  return strcasecmpCM(word, keyword) == 0;
 }
 
 /* Disable some warnings in the generated code.  */