keystruct constantness

source/global.h

@@ -195,8 +195,8 @@ extern int	 blocklen;	  /* length of disk block read */
 
 /* lookup.c global data */
 extern struct keystruct {
-		char			 *text;
-		char			  delim;
+		const char * text;
+		const char delim;
 		struct keystruct *next;
 } keyword[];
 
@@ -315,7 +315,7 @@ int			findinit(const char *pattern_);
 MOUSE	   *getmouseaction(char leading_char);
 
 int	 egrep(char *file, FILE *output, char *format);
-int	 hash(char *ss);
+int	 hash(const char * ss);
 int	 execute(char *a, ...);
 long dbseek(long offset);
 

source/lookup.c

@@ -39,11 +39,11 @@
 #include "lookup.h"
 
 /* keyword text for fast testing of keywords in the scanner */
-char enumtext[]	   = "enum";
-char externtext[]  = "extern";
-char structtext[]  = "struct";
-char typedeftext[] = "typedef";
-char uniontext[]   = "union";
+const char enumtext[]	 = "enum";
+const char externtext[]  = "extern";
+const char structtext[]  = "struct";
+const char typedeftext[] = "typedef";
+const char uniontext[]   = "union";
 
 /* This keyword table is also used for keyword text compression.  Keywords
  * with an index less than the numeric value of a space are replaced with the

source/lookup.h

@@ -36,10 +36,10 @@
 /* declarations for objects defined in lookup.c */
 
 /* keyword text for fast testing of keywords in the scanner */
-extern char enumtext[];
-extern char externtext[];
-extern char structtext[];
-extern char typedeftext[];
-extern char uniontext[];
+extern const char enumtext[];
+extern const char externtext[];
+extern const char structtext[];
+extern const char typedeftext[];
+extern const char uniontext[];
 
 #endif /* CSCOPE_LOOKUP_H */