2 files changed, 91 insertions, 0 deletions
diff --git a/src/library/std/stdio.c b/src/library/std/stdio.c
new file mode 100644
index 0000000..3b24da1
--- /dev/null
+++ b/src/library/std/stdio.c
@@ -0,0 +1,51 @@
+#include <stdlib.h>
+
+void printk_int(int number) {
+	if (number == 0) {
+		printk("0");
+		return;
+	}
+	int negative = 0;
+	if (number < 0) {
+		negative = 1;
+		number = 0 - number;
+	}
+	int order = 0, temp = number, i;
+	char numbers[] = "0123456789";
+	while (temp > 0) {
+		order++;
+		temp /= 10;
+	}
+
+	char *s, *r;
+	s = malloc(order + (negative ? 2 : 1));
+	if (negative) {
+		s[0] = '-';
+		r = s + 1;
+	} else {
+		r = s;
+	}
+
+	for (i = order; i > 0; i--) {
+		r[i - 1] = numbers[number % 10];
+		number /= 10;
+	}
+	r[order] = 0;
+	printk(s);
+	free(s);
+}
+
+void printk_hex(unsigned v) {
+	char s[11] = {'0', 'x', 0};
+
+	int i;
+
+	char hexdigits[] = "0123456789ABCDEF";
+
+	for (i = 0; i < 8; i++) {
+		s[i + 2] = (hexdigits[v >> 28]);
+		v = v << 4;
+	}
+	s[11] = 0;
+	printk(s);
+}
diff --git a/src/library/std/string.c b/src/library/std/string.c
index 869256a..4c374ad 100644
--- a/src/library/std/string.c
+++ b/src/library/std/string.c
@@ -6,6 +6,46 @@ int strlen(const char *str) {
 	return i;
 }
 
+char *strchr(const char *str, char c) {
+	while (*str) {
+		if (*str == c) return (char*)str;
+		str++;
+	}
+	return NULL;
+}
+
+char *strcpy(char *dest, const char *src) {
+	memcpy(dest, src, strlen(src) + 1);
+	return (char*)src;
+}
+
+char *strdup(const char *src) {
+	char* ret = malloc(strlen(src) + 1);
+	if (ret == NULL) return ret;
+	strcpy(ret, src);
+	return ret;
+}
+
+char *strcat(char *dest, const char *src) {
+	char *dest2 = dest;
+	dest2 += strlen(dest) - 1;
+	while (*src) {
+		*dest2 = *src;
+		src++;
+		dest2++;
+	}
+	*dest2 = 0;
+	return dest;
+}
+
+int strcmp(const char *s1, const char *s2) {
+	while ((*s1) && (*s1 == *s2)) {
+		s1++;
+		s2++;
+	}
+	return (* (unsigned char*)s1 - *(unsigned char*)s2);
+}
+
 void *memcpy(void *vd, const void *vs, int count) {
 	uint8_t *dest = (uint8_t*)vd, *src = (uint8_t*)vs;
 	uint32_t f = count % 4, n = count / 4, i;