fix sign checks in strncasecmp and memcmp

src/library.js

@@ -4243,8 +4243,8 @@ LibraryManager.library = {
   strncasecmp: function(px, py, n) {
     var i = 0;
     while (i < n) {
-      var x = _tolower({{{ makeGetValue('px', 'i', 'i8') }}});
-      var y = _tolower({{{ makeGetValue('py', 'i', 'i8') }}});
+      var x = _tolower({{{ makeGetValue('px', 'i', 'i8', 0, 1) }}});
+      var y = _tolower({{{ makeGetValue('py', 'i', 'i8', 0, 1) }}});
       if (x == y && x == 0) return 0;
       if (x == 0) return -1;
       if (y == 0) return 1;
@@ -4260,8 +4260,8 @@ LibraryManager.library = {
 
   memcmp: function(p1, p2, num) {
     for (var i = 0; i < num; i++) {
-      var v1 = {{{ makeGetValue('p1', 'i', 'i8') }}};
-      var v2 = {{{ makeGetValue('p2', 'i', 'i8') }}};
+      var v1 = {{{ makeGetValue('p1', 'i', 'i8', 0, 1) }}};
+      var v2 = {{{ makeGetValue('p2', 'i', 'i8', 0, 1) }}};
       if (v1 != v2) return v1 > v2 ? 1 : -1;
     }
     return 0;

tests/runner.py

@@ -1493,13 +1493,19 @@ c5,de,15,8a
         #include <string.h>
         int main()
         {
-          char *word = "WORD";
-          char *wordEntry = "Â";
-          int cmp = strncmp(word, wordEntry, 2);
-          printf("Compare value is %d\\n", cmp);
+          #define TEST(func) \
+          { \
+            char *word = "WORD"; \
+            char *wordEntry = "Â"; \
+            int cmp = func(word, wordEntry, 2); \
+            printf("Compare value " #func " is %d\\n", cmp); \
+          }
+          TEST(strncmp);
+          TEST(strncasecmp);
+          TEST(memcmp);
         }
       '''
-      self.do_run(src, 'Compare value is -1\n')
+      self.do_run(src, 'Compare value strncmp is -1\nCompare value strncasecmp is -1\nCompare value memcmp is -1\n')
 
     def test_strndup(self):
         src = '''