7.4: initial commit

1 files changed, 34 insertions, 0 deletions

diff --git a/7.4/mscanf.c b/7.4/mscanf.c
new file mode 100644
index 0000000..8f09f35
--- /dev/null
+++ b/7.4/mscanf.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include "mscanf.h"
+
+#define MAXFMT 100
+
+void mscanf(char *fmt, ...)
+{
+	va_list ap;
+	int i;
+	char lfmt[MAXFMT];
+
+	va_start(ap, fmt);
+	for (; *fmt; fmt++) {
+		if (isblank(*fmt)) {
+			continue;
+		} else if (*fmt != '%') {
+			if (*fmt == getchar())
+				continue;
+			else
+				break;
+		}
+
+		i = 0;
+		while (i < MAXFMT && !isalpha(lfmt[i++] = *fmt++))
+			;
+		lfmt[i] = '\0';
+		scanf(lfmt, va_arg(ap, void *));
+
+		fmt--;
+	}
+	va_end(ap);
+}