MUCH work in libc

Also cleaned up some syscalls etc

11 files changed, 163 insertions, 0 deletions

diff --git a/src/userspace/libc/string/strcat.c b/src/userspace/libc/string/strcat.c
new file mode 100644
index 0000000..f62d6e2
--- /dev/null
+++ b/src/userspace/libc/string/strcat.c
@@ -0,0 +1,12 @@
+#include <stdint.h>
+#include <string.h>
+
+void strcat(char *dest, char *orig)
+{
+	u8 s_dest = strlen(dest);
+	u8 s_orig = strlen(orig);
+
+	for (u8 i = 0; i < s_orig; i++)
+		dest[s_dest + i] = orig[i];
+	dest[s_dest + s_orig] = 0;
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strcati.c b/src/userspace/libc/string/strcati.c
new file mode 100644
index 0000000..5da986d
--- /dev/null
+++ b/src/userspace/libc/string/strcati.c
@@ -0,0 +1,10 @@
+#include <stdint.h>
+#include <string.h>
+
+void strcati(char *dest, char *orig)
+{
+	u8 s_orig = strlen(orig);
+	strdisp(dest, (int)s_orig);
+	for (u8 i = 0; i < s_orig; i++)
+		dest[i] = orig[i];
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strcmp.c b/src/userspace/libc/string/strcmp.c
new file mode 100644
index 0000000..4282520
--- /dev/null
+++ b/src/userspace/libc/string/strcmp.c
@@ -0,0 +1,14 @@
+#include <stdint.h>
+#include <string.h>
+
+char strcmp(char *a, char *b)
+{
+	if (strlen(a) != strlen(b))
+		return 1;
+
+	for (u8 i = 0; i < strlen(a); i++)
+		if (a[i] != b[i])
+			return 1;
+
+	return 0;
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strcpy.c b/src/userspace/libc/string/strcpy.c
new file mode 100644
index 0000000..733f7ba
--- /dev/null
+++ b/src/userspace/libc/string/strcpy.c
@@ -0,0 +1,11 @@
+#include <stdint.h>
+#include <string.h>
+
+void strcpy(char *dest, char *orig)
+{
+	u8 s_orig = strlen(orig);
+
+	for (u8 i = 0; i < s_orig; i++)
+		dest[i] = orig[i];
+	dest[s_orig] = 0;
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strdisp.c b/src/userspace/libc/string/strdisp.c
new file mode 100644
index 0000000..7e8c05a
--- /dev/null
+++ b/src/userspace/libc/string/strdisp.c
@@ -0,0 +1,15 @@
+#include <stdint.h>
+#include <string.h>
+
+void strdisponce(char *str)
+{
+	for (u8 i = sizeof(str) + 2; i > 0; i--)
+		str[i] = str[i - 1];
+	str[0] = 0;
+}
+
+void strdisp(char *str, int n)
+{
+	for (int i = 0; i < n; i++)
+		strdisponce(str);
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strdup.c b/src/userspace/libc/string/strdup.c
new file mode 100644
index 0000000..f2a7c35
--- /dev/null
+++ b/src/userspace/libc/string/strdup.c
@@ -0,0 +1,12 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char *strdup(char *orig)
+{
+	u8 s_orig = strlen(orig);
+	char *ret = (char *)malloc(s_orig + 1);
+	strcpy(ret, orig);
+	return ret;
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strinv.c b/src/userspace/libc/string/strinv.c
new file mode 100644
index 0000000..38f0b78
--- /dev/null
+++ b/src/userspace/libc/string/strinv.c
@@ -0,0 +1,14 @@
+#include <stdint.h>
+#include <string.h>
+
+void strinv(char *str)
+{
+	u8 s_str = strlen(str);
+
+	int iterations = (int)s_str / 2;
+	for (int i = 0; i < iterations; i++) {
+		char aux = str[i];
+		str[i] = str[(s_str - i) - 1];
+		str[(s_str - i) - 1] = aux;
+	}
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strlen.c b/src/userspace/libc/string/strlen.c
new file mode 100644
index 0000000..cc8b804
--- /dev/null
+++ b/src/userspace/libc/string/strlen.c
@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+u8 strlen(char *str)
+{
+	u8 len = 0;
+	while (str[len])
+		len++;
+	return len;
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strncmp.c b/src/userspace/libc/string/strncmp.c
new file mode 100644
index 0000000..450fbd8
--- /dev/null
+++ b/src/userspace/libc/string/strncmp.c
@@ -0,0 +1,16 @@
+int strncmp(char *s1, char *s2, int c)
+{
+	int result = 0;
+
+	while (c) {
+		result = *s1 - *s2++;
+
+		if ((result != 0) || (*s1++ == 0)) {
+			break;
+		}
+
+		c--;
+	}
+
+	return result;
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strsep.c b/src/userspace/libc/string/strsep.c
new file mode 100644
index 0000000..badbf0f
--- /dev/null
+++ b/src/userspace/libc/string/strsep.c
@@ -0,0 +1,25 @@
+#include <stddef.h>
+
+char *strsep(char **stringp, char *delim)
+{
+	char *s;
+	const char *spanp;
+	int c, sc;
+	char *tok;
+	if ((s = *stringp) == NULL)
+		return (NULL);
+	for (tok = s;;) {
+		c = *s++;
+		spanp = delim;
+		do {
+			if ((sc = *spanp++) == c) {
+				if (c == 0)
+					s = NULL;
+				else
+					s[-1] = 0;
+				*stringp = s;
+				return (tok);
+			}
+		} while (sc != 0);
+	}
+}
\ No newline at end of file
diff --git a/src/userspace/libc/string/strstr.c b/src/userspace/libc/string/strstr.c
new file mode 100644
index 0000000..c87f3fc
--- /dev/null
+++ b/src/userspace/libc/string/strstr.c
@@ -0,0 +1,25 @@
+#include <stdint.h>
+#include <string.h>
+
+char *strstr(char *in, char *str)
+{
+	char c;
+	u32 len;
+
+	c = *str++;
+	if (!c)
+		return (char *)in;
+
+	len = strlen(str);
+	do {
+		char sc;
+
+		do {
+			sc = *in++;
+			if (!sc)
+				return (char *)0;
+		} while (sc != c);
+	} while (strncmp(in, str, len) != 0);
+
+	return (char *)(in - 1);
+}
\ No newline at end of file