gdbsupport: make use of safe-ctype functions from libiberty

Make use of the safe-ctype replacements for the standard ctype
character checking functions in gdbsupport/common-utils.cc.  The
gdbsupport library is included into both gdb and gdbserver, and on the
gdbserver side there are two targets, gdbserver itself, and also
libinproctrace.so.

libiberty was already being included in the gdbserver link command,
but was missing from the libinproctrace.so link.  As a result, after
changing gdbsupport/common-utils.cc to depend on libiberty,
libinproctrace.so would no longer link until I modified its link line.

gdbserver/ChangeLog:

	* Makefile.in (IPA_LIB): Include libiberty library.

gdbsupport/ChangeLog:

	* gdbsupport/common-utils.cc: Change 'ctype.h' include to
	'safe-ctype.h'.
	(extract_string_maybe_quoted): Use safe-ctype function versions.
	(is_digit_in_base): Likewise.
	(digit_to_int): Likewise.
	(strtoulst): Likewise.
	(skip_spaces): Likewise.
	(skip_to_space): Likewise.

gdbserver/ChangeLog

@@ -1,3 +1,7 @@
+2020-12-11  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* Makefile.in (IPA_LIB): Include libiberty library.
+
 2020-11-11  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* server.cc (gdbserver_usage): Add missing option to usage text.

gdbserver/Makefile.in

@@ -395,7 +395,7 @@ $(IPA_LIB): $(sort $(IPA_OBJS)) ${CDEPS}
 	$(ECHO_CXXLD) $(CC_LD) -shared -fPIC -Wl,--soname=$(IPA_LIB) \
 		-Wl,--no-undefined $(INTERNAL_CFLAGS) $(INTERNAL_LDFLAGS) \
 		 $(CXXFLAGS) \
-		-o $(IPA_LIB) ${IPA_OBJS} -ldl -pthread
+		-o $(IPA_LIB) ${IPA_OBJS} $(LIBIBERTY) -ldl -pthread
 
 # Put the proper machine-specific files first, so M-. on a machine
 # specific routine gets the one for the correct machine.

gdbsupport/ChangeLog

@@ -1,3 +1,14 @@
+2020-12-11  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* gdbsupport/common-utils.cc: Change 'ctype.h' include to
+	'safe-ctype.h'.
+	(extract_string_maybe_quoted): Use safe-ctype function versions.
+	(is_digit_in_base): Likewise.
+	(digit_to_int): Likewise.
+	(strtoulst): Likewise.
+	(skip_spaces): Likewise.
+	(skip_to_space): Likewise.
+
 2020-12-11  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* common-debug.h (debug_prefixed_printf_cond): New.

gdbsupport/common-utils.cc

@@ -20,7 +20,7 @@
 #include "common-defs.h"
 #include "common-utils.h"
 #include "host-defs.h"
-#include <ctype.h>
+#include "safe-ctype.h"
 
 void *
 xzalloc (size_t size)
@@ -177,7 +177,7 @@ extract_string_maybe_quoted (const char **arg)
   /* Parse p similarly to gdb_argv buildargv function.  */
   while (*p != '\0')
     {
-      if (isspace (*p) && !squote && !dquote && !bsquote)
+      if (ISSPACE (*p) && !squote && !dquote && !bsquote)
 	break;
       else
 	{
@@ -230,21 +230,21 @@ extract_string_maybe_quoted (const char **arg)
 static int
 is_digit_in_base (unsigned char digit, int base)
 {
-  if (!isalnum (digit))
+  if (!ISALNUM (digit))
     return 0;
   if (base <= 10)
-    return (isdigit (digit) && digit < base + '0');
+    return (ISDIGIT (digit) && digit < base + '0');
   else
-    return (isdigit (digit) || tolower (digit) < base - 10 + 'a');
+    return (ISDIGIT (digit) || TOLOWER (digit) < base - 10 + 'a');
 }
 
 static int
 digit_to_int (unsigned char c)
 {
-  if (isdigit (c))
+  if (ISDIGIT (c))
     return c - '0';
   else
-    return tolower (c) - 'a' + 10;
+    return TOLOWER (c) - 'a' + 10;
 }
 
 /* As for strtoul, but for ULONGEST results.  */
@@ -258,7 +258,7 @@ strtoulst (const char *num, const char **trailer, int base)
   int i = 0;
 
   /* Skip leading whitespace.  */
-  while (isspace (num[i]))
+  while (ISSPACE (num[i]))
     i++;
 
   /* Handle prefixes.  */
@@ -325,7 +325,7 @@ skip_spaces (char *chp)
 {
   if (chp == NULL)
     return NULL;
-  while (*chp && isspace (*chp))
+  while (*chp && ISSPACE (*chp))
     chp++;
   return chp;
 }
@@ -337,7 +337,7 @@ skip_spaces (const char *chp)
 {
   if (chp == NULL)
     return NULL;
-  while (*chp && isspace (*chp))
+  while (*chp && ISSPACE (*chp))
     chp++;
   return chp;
 }
@@ -349,7 +349,7 @@ skip_to_space (const char *chp)
 {
   if (chp == NULL)
     return NULL;
-  while (*chp && !isspace (*chp))
+  while (*chp && !ISSPACE (*chp))
     chp++;
   return chp;
 }