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- /*
- * ctype.c - character handling
- */
- /* $Header$ */
- int isalnum(int c); /* Alpha numeric character */
- int isalpha(int c); /* Alpha character */
- int iscntrl(int c); /* Control character */
- int isdigit(int c); /* Digit character */
- int isgraph(int c); /* Graphical character */
- int islower(int c); /* Lower case character */
- int isprint(int c); /* Printable character */
- int ispunct(int c); /* Punctuaction character */
- int isspace(int c); /* Space character */
- int isupper(int c); /* Upper case character */
- int isxdigit(int c); /* Hexdecimal digit character */
- int tolower(int c); /* Convert to lower case character */
- int toupper(int c); /* Convert to upper case character */
- int isalnum(int c) { /* Alpha numeric character */
- return isdigit(c) || isalpha(c);
- }
- int isalpha(int c) { /* Alpha character */
- return isupper(c) || islower(c);
- }
- int iscntrl(int c) { /* Control character */
- return (c >= 0 && c <= 0x1f) || c == 0x7f;
- }
- int isdigit(int c) { /* Digit character */
- return (unsigned)(c - '0') < 10;
- }
- int isgraph(int c) { /* Graphical character */
- return isprint(c) && c != ' ';
- }
- int islower(int c) { /* Lower case character */
- return (unsigned)(c - 'a') < 26;
- }
- int isprint(int c) { /* Printable character */
- return c > ' ' && c < 0x7f;
- }
- int ispunct(int c) { /* Punctuation character */
- return isprint(c) && !(c == ' ' || isalnum(c));
- }
- int isspace(int c) { /* Space character */
- return c == ' ' || c == '\f' || c == '\n' ||
- c == '\r' || c == '\t' || c == '\v';
- }
- int isupper(int c) { /* Upper case character */
- return (unsigned)(c - 'A') < 26;
- }
- int isxdigit(int c) { /* Hexdecimal digit character */
- return isdigit(c) ||
- (c >= 'A' && c <= 'F') ||
- (c >= 'a' && c <= 'f');
- }
- int tolower(int c) { /* Convert to lower case character */
- if (!isupper(c)) return c;
- else return c - 'A' + 'a';
- }
- int toupper(int c) { /* Convert to upper case character */
- if (!islower(c)) return c;
- else return c - 'a' + 'A';
- }
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