ctype: Make functions static inline, move to the header

DONE: RTOS-549

Makefile

@@ -36,7 +36,6 @@ all: $(PREFIX_A)libphoenix.a
 
 
 include arch/$(TARGET_SUFF)/Makefile
-include ctype/Makefile
 include err/Makefile
 include errno/Makefile
 include locale/Makefile

include/ctype.h

@@ -5,8 +5,8 @@
  *
  * ctypes.h
  *
- * Copyright 2017 Phoenix Systems
- * Author: Pawel Pisarczyk
+ * Copyright 2017, 2023 Phoenix Systems
+ * Author: Pawel Pisarczyk, Adrian Kepka, Aleksander Kaminski
  *
  * This file is part of Phoenix-RTOS.
  *
@@ -22,65 +22,107 @@ extern "C" {
 #endif
 
 
-/* This function checks whether the passed character is alphanumeric. */
-extern int isalnum(int c);
+/* This function checks whether the passed character is lowercase letter. */
+static inline int islower(int c)
+{
+	return (c >= 'a' && c <= 'z') ? 1 : 0;
+}
+
+
+/* This function checks whether the passed character is an uppercase letter. */
+static inline int isupper(int c)
+{
+	return (c >= 'A' && c <= 'Z') ? 1 : 0;
+}
 
 
 /* This function checks whether the passed character is alphabetic. */
-extern int isalpha(int c);
+static inline int isalpha(int c)
+{
+	return (islower(c) || isupper(c)) ? 1 : 0;
+}
 
 
 /* This function checks whether the passed character is control character. */
-extern int iscntrl(int c);
+static inline int iscntrl(int c)
+{
+	return (((c >= 0x00) && (c <= 0x1f)) || c == 0x7f) ? 1 : 0;
+}
 
 
 /* This function checks whether the passed character is decimal digit. */
-extern int isdigit(int c);
+static inline int isdigit(int c)
+{
+	return (c >= '0' && c <= '9') ? 1 : 0;
+}
 
 
-/* This function checks whether the passed character has graphical representation using locale. */
-extern int isgraph(int c);
+/* This function checks whether the passed character is alphanumeric. */
+static inline int isalnum(int c)
+{
+	return (isalpha(c) || isdigit(c)) ? 1 : 0;
+}
 
 
-/* This function checks whether the passed character is lowercase letter. */
-extern int islower(int c);
+/* This function checks whether the passed character is printable. */
+static inline int isprint(int c)
+{
+	return ((c > 0x1f) && (c < 0x7f)) ? 1 : 0;
+}
 
 
-/* This function checks whether the passed character is printable. */
-extern int isprint(int c);
+/* This function checks whether the passed character has graphical representation using locale. */
+static inline int isgraph(int c)
+{
+	return ((c != ' ') && (isprint(c) != 0)) ? 1 : 0;
+}
 
 
 /* This function checks whether the passed character is a punctuation character. */
-extern int ispunct(int c);
+static inline int ispunct(int c)
+{
+	return ((isgraph(c) != 0) && (isalnum(c) == 0)) ? 1 : 0;
+}
 
 
 /* This function checks whether the passed character is white-space. */
-extern int isspace(int c);
-
-
-/* This function checks whether the passed character is an uppercase letter. */
-extern int isupper(int c);
+static inline int isspace(int c)
+{
+	return (c == ' ' || c == '\f' || c == '\t' || c == '\n' || c == '\r' || c == '\v') ? 1 : 0;
+}
 
 
 /* This function checks whether the passed character is a hexadecimal digit. */
-extern int isxdigit(int c);
+static inline int isxdigit(int c)
+{
+	return (((c >= '0') && (c <= '9')) || ((c >= 'a') && (c <= 'f')) || ((c >= 'A') && (c <= 'F'))) ? 1 : 0;
+}
 
 
 /* This function checks whether the passed character is a blank character. */
-extern int isblank(int c);
+static inline int isblank(int c)
+{
+	return ((c == ' ') || (c == '\t')) ? 1 : 0;
+}
 
 
 /* This function converts uppercase letters to lowercase. */
-extern int tolower(int c);
+static inline int tolower(int c)
+{
+	return (isupper(c) != 0) ? (c - 'A' + 'a') : c;
+}
 
 
 /* This function converts lowercase letters to uppercase. */
-extern int toupper(int c);
+static inline int toupper(int c)
+{
+	return (islower(c) != 0) ? (c - 'a' + 'A') : c;
+}
 
 
 static inline int isascii(int c)
 {
-	return (c & ~0x7f);
+	return ((c < 0) || (c > '\x7f')) ? 0 : 1;
 }