add ctype.h header

Sometimes coreboot needs to compile external code (e.g.
vboot_reference) using its own set of system header files.  When
these headers don't line up with C Standard Library, it causes
problems.

Create ctype.h header file.  Relocate ctype.h functions from
string.h into ctype.h.  Update source files which call ctype.h
functions accordingly.

Note that ctype.h still lacks five functions which are not used
in coreboot source:
  isalnum, isalpha, iscntrl, isgraph, ispunct

BUG=b:124141368
TEST=make clean && make test-abuild
BRANCH=none

Change-Id: I31b5e8af49956ec024a392a73c3c9024b9a9c194
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33525
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

2 files changed, 56 insertions, 52 deletions

diff --git a/src/include/ctype.h b/src/include/ctype.h
new file mode 100644
index 0000000000..b4684af768
--- /dev/null
+++ b/src/include/ctype.h
@@ -0,0 +1,56 @@
+#ifndef CTYPE_H
+#define CTYPE_H
+
+static inline int isspace(int c)
+{
+	switch (c) {
+	case ' ': case '\f': case '\n':
+	case '\r': case '\t': case '\v':
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static inline int isprint(int c)
+{
+	return c >= ' ' && c <= '~';
+}
+
+static inline int isdigit(int c)
+{
+	return (c >= '0' && c <= '9');
+}
+
+static inline int isxdigit(int c)
+{
+	return ((c >= '0' && c <= '9') ||
+		(c >= 'a' && c <= 'f') ||
+		(c >= 'A' && c <= 'F'));
+}
+
+static inline int isupper(int c)
+{
+	return (c >= 'A' && c <= 'Z');
+}
+
+static inline int islower(int c)
+{
+	return (c >= 'a' && c <= 'z');
+}
+
+static inline int toupper(int c)
+{
+	if (islower(c))
+		c -= 'a'-'A';
+	return c;
+}
+
+static inline int tolower(int c)
+{
+	if (isupper(c))
+		c -= 'A'-'a';
+	return c;
+}
+
+#endif /* CTYPE_H */
diff --git a/src/include/string.h b/src/include/string.h
index d164f32b83..30241303eb 100644
--- a/src/include/string.h
+++ b/src/include/string.h
@@ -50,56 +50,4 @@ char *strrchr(const char *s, int c);
  */
 unsigned int skip_atoi(char **s);
 
-static inline int isspace(int c)
-{
-	switch (c) {
-	case ' ': case '\f': case '\n':
-	case '\r': case '\t': case '\v':
-		return 1;
-	default:
-		return 0;
-	}
-}
-
-static inline int isprint(int c)
-{
-	return c >= ' ' && c <= '~';
-}
-
-static inline int isdigit(int c)
-{
-	return (c >= '0' && c <= '9');
-}
-
-static inline int isxdigit(int c)
-{
-	return ((c >= '0' && c <= '9') ||
-		(c >= 'a' && c <= 'f') ||
-		(c >= 'A' && c <= 'F'));
-}
-
-static inline int isupper(int c)
-{
-	return (c >= 'A' && c <= 'Z');
-}
-
-static inline int islower(int c)
-{
-	return (c >= 'a' && c <= 'z');
-}
-
-static inline int toupper(int c)
-{
-	if (islower(c))
-		c -= 'a'-'A';
-	return c;
-}
-
-static inline int tolower(int c)
-{
-	if (isupper(c))
-		c -= 'A'-'a';
-	return c;
-}
-
 #endif /* STRING_H */