1 files changed, 142 insertions, 0 deletions
diff --git a/roms/qboot/string.c b/roms/qboot/string.c
new file mode 100644
index 000000000..e3ebfa7e4
--- /dev/null
+++ b/roms/qboot/string.c
@@ -0,0 +1,142 @@
+#include "string.h"
+
+unsigned long strlen(const char *buf)
+{
+    unsigned long len = 0;
+
+    while (*buf++)
+	++len;
+    return len;
+}
+
+char *strcat(char *dest, const char *src)
+{
+    char *p = dest;
+
+    while (*p)
+	++p;
+    while ((*p++ = *src++) != 0)
+	;
+    return dest;
+}
+
+char *strcpy(char *dest, const char *src)
+{
+    *dest = 0;
+    return strcat(dest, src);
+}
+
+int strcmp(const char *a, const char *b)
+{
+    while (*a == *b) {
+	if (*a == '\0') {
+	    break;
+	}
+	++a, ++b;
+    }
+    return *a - *b;
+}
+
+char *strchr(const char *s, int c)
+{
+    while (*s != (char)c)
+	if (*s++ == '\0')
+	    return NULL;
+    return (char *)s;
+}
+
+char *strstr(const char *s1, const char *s2)
+{
+    size_t l1, l2;
+
+    l2 = strlen(s2);
+    if (!l2)
+	return (char *)s1;
+    l1 = strlen(s1);
+    while (l1 >= l2) {
+	l1--;
+	if (!memcmp(s1, s2, l2))
+	    return (char *)s1;
+	s1++;
+    }
+    return NULL;
+}
+
+int memcmp(const void *s1, const void *s2, size_t n)
+{
+    const unsigned char *a = s1, *b = s2;
+    int ret = 0;
+
+    while (n--) {
+	ret = *a - *b;
+	if (ret)
+	    break;
+	++a, ++b;
+    }
+    return ret;
+}
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+    const unsigned char *s = src;
+    unsigned char *d = dest;
+
+    if (d <= s) {
+	while (n--)
+	    *d++ = *s++;
+    } else {
+	d += n, s += n;
+	while (n--)
+	    *--d = *--s;
+    }
+    return dest;
+}
+
+void *memchr(const void *s, int c, size_t n)
+{
+    const unsigned char *str = s, chr = (unsigned char)c;
+
+    while (n--)
+	if (*str++ == chr)
+	    return (void *)(str - 1);
+    return NULL;
+}
+
+long atol(const char *ptr)
+{
+    long acc = 0;
+    const char *s = ptr;
+    int neg, c;
+
+    while (*s == ' ' || *s == '\t')
+        s++;
+    if (*s == '-'){
+        neg = 1;
+        s++;
+    } else {
+        neg = 0;
+        if (*s == '+')
+            s++;
+    }
+
+    while (*s) {
+        if (*s < '0' || *s > '9')
+            break;
+        c = *s - '0';
+        acc = acc * 10 + c;
+        s++;
+    }
+
+    if (neg)
+        acc = -acc;
+
+    return acc;
+}
+
+uint8_t csum8(uint8_t *buf, uint32_t len)
+{
+	uint32_t s = 0;
+	while (len-- > 0)
+		s += *buf++;
+	return s;
+}