1 files changed, 29 insertions, 0 deletions
diff --git a/ports/esp8266/strtoll.c b/ports/esp8266/strtoll.c
new file mode 100644
index 000000000..4e8a4d056
--- /dev/null
+++ b/ports/esp8266/strtoll.c
@@ -0,0 +1,29 @@
+#include <stdlib.h>
+
+// assumes endptr != NULL
+// doesn't check for sign
+// doesn't check for base-prefix
+long long int strtoll(const char *nptr, char **endptr, int base) {
+    long long val = 0;
+
+    for (; *nptr; nptr++) {
+        int v = *nptr;
+        if ('0' <= v && v <= '9') {
+            v -= '0';
+        } else if ('A' <= v && v <= 'Z') {
+            v -= 'A' - 10;
+        } else if ('a' <= v && v <= 'z') {
+            v -= 'a' - 10;
+        } else {
+            break;
+        }
+        if (v >= base) {
+            break;
+        }
+        val = val * base + v;
+    }
+
+    *endptr = (char*)nptr;
+
+    return val;
+}