First commit

2 files changed, 72 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d320f96
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*
+
+!int2bin.c
+
+!.gitignore
diff --git a/int2bin.c b/int2bin.c
new file mode 100644
index 0000000..4917a3d
--- /dev/null
+++ b/int2bin.c
@@ -0,0 +1,67 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+//globals
+int bits = 32;
+bool raw = false;
+
+void print_help(char *name){
+	printf("Usage: %s [OPTION]... NUMBER...\n", name);
+	printf("Convert NUMBER(S) to binary\n\n");
+
+	printf("Options:\n");
+	printf("  -b, --bits\tSpecify number of bits to print (default is 32)\n");
+	printf("  -h, --help\tPrint this help message and exit\n");
+	printf("      --raw \tPrint only the binary form\n");
+}
+
+char *to_bin(int n, int bits){
+	char *out = malloc(sizeof(char) * (bits+1));
+	int i;
+
+	out[bits] = '\0';
+
+	for(i = bits-1; i >= 0; --i){
+		out[i] = (n & 1 ? '1' : '0');
+		n /= 2;
+	}
+
+	return out;
+}
+
+
+
+int main(int argc, char **argv){
+	int i;
+
+	//print help if no arguments
+	if(argc < 2){
+		print_help(argv[0]);
+		return 0;
+	}
+
+	//check for arguments
+	for(i = 1; i < argc; ++i){
+		if(!(strcmp(argv[i], "--"))){
+			++i;
+			break;
+		}
+		else if(!(strcmp(argv[i], "-b")) || !(strcmp(argv[i], "--bits"))){
+			if(i+1 >= argc) break; //check that the flag was given an argument
+			bits = atoi(argv[i+1]);
+			++i;
+		}
+		else if(!(strcmp(argv[i], "-h")) || !(strcmp(argv[i], "--help"))) print_help(argv[0]);
+		else if(!(strcmp(argv[i], "--raw"))) raw = true;
+		else break;
+	}
+
+	//convert each argument to binary
+	while(i < argc){
+		if(!raw) printf("%d -> ", atoi(argv[i]));
+		printf("%s\n", to_bin(atoi(argv[i]), bits));
+		++i;
+	}
+}