2 files changed, 9 insertions, 0 deletions
diff --git a/src/library.js b/src/library.js
index 32a809fe..2a4a5e7d 100644
--- a/src/library.js
+++ b/src/library.js
@@ -3382,6 +3382,12 @@ LibraryManager.library = {
     return __parseInt(str, endptr, base, 0, 18446744073709551615, 64, true);  // ULONG_MAX; imprecise.
   },
 
+  atof: function(ptr) {
+    var str = Pointer_stringify(ptr);
+    var ret = parseFloat(str);
+    return isNaN(ret) ? 0 : ret;
+  },
+
   qsort__deps: ['memcpy'],
   qsort: function(base, num, size, comparator) {
     if (num == 0 || size == 0) return;
diff --git a/tests/runner.py b/tests/runner.py
index 7361f978..d5489dd6 100644
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -2882,6 +2882,7 @@ at function.:blag
       src = r'''
         #include <stdio.h>
         #include <string.h>
+        #include <stdlib.h>
 
         int main () {
           #define CHECK(str) \
@@ -2896,6 +2897,8 @@ at function.:blag
           CHECK("en-r");
           CHECK("en 3");
 
+          printf("%f, %f\n", atof("1.234567"), atof("cheez"));
+
           return 0;
         }
         '''