independ str(1)

str/str.c

@@ -0,0 +1,53 @@
+#include <ctype.h>
+#include <stddef.h> /* NULL */
+#include <stdio.h> /* fprintf(3) */
+#include <string.h> /* strcmp(3) */
+#ifdef DONT_USE_SYSTEM_SYSEXITS
+#	include "../include/sysexits.h" /* EX_USAGE */
+#else
+#	include <sysexits.h> /* EX_USAGE */
+#endif
+
+static char *program_name = "str";
+
+static struct {
+	char *name;
+	int (*f)(int);
+}ctypes[] = {
+	{ "isalnum", isalnum },
+	{ "isalpha", isalpha },
+	{ "isblank", isblank },
+	{ "iscntrl", iscntrl },
+	{ "isdigit", isdigit },
+	{ "isxdigit", isxdigit },
+	{ "isgraph", isgraph },
+	{ "islower", islower },
+	{ "isprint", isprint },
+	{ "ispunct", ispunct },
+	{ "isspace", isspace },
+	{ "isupper", isupper }
+};
+
+int main(int argc, char *argv[]){
+	int ctype;
+	int i;
+
+	if(argc < 3){
+usage:		fprintf(stderr, "Usage: %s [type] [string...]\n",
+			argv[0] == NULL ? program_name : argv[0]
+		);
+		return EX_USAGE;
+	}
+
+	for(ctype = 0; ctype < (sizeof(ctypes)/sizeof(ctypes[0])); ++ctype)
+		if(strcmp(argv[1], ctypes[ctype].name) == 0)
+			goto pass;
+	goto usage;
+
+pass:	for(argv += 2; *argv != NULL; ++argv)
+		for(i = 0; argv[0][i] != '\0'; ++i)
+			if(!ctypes[ctype].f(argv[0][i]))
+				return 1;
+
+	return 0;
+}