improved code path for typical platforms where there is a wider integer type

scan/scan_uint.c

@@ -10,6 +10,16 @@ size_t scan_uint(const char* src,unsigned int* dest) {
     /* a good optimizing compiler should remove the else clause when not
      * needed */
     return scan_ulong(src,(unsigned long*)dest);
+  } else if (sizeof(unsigned int) < sizeof(unsigned long)) {
+    const char* cur;
+    unsigned int l;
+    for (cur=src,l=0; *cur>='0' && *cur<='9'; ++cur) {
+      unsigned long tmp=l*10ul+*cur-'0';
+      if ((unsigned int)tmp != tmp) break;
+      l=tmp;
+    }
+    if (cur>src) *dest=l;
+    return (size_t)(cur-src);
   } else {
     register const char *tmp=src;
     register unsigned int l=0;

scan/scan_ushort.c

@@ -10,6 +10,16 @@ size_t scan_ushort(const char* src,unsigned short* dest) {
     /* a good optimizing compiler should remove the else clause when not
      * needed */
     return scan_uint(src,(unsigned int*)dest);
+  } if (sizeof(unsigned short) < sizeof(unsigned long)) {
+    const char* cur;
+    unsigned short l;
+    for (cur=src,l=0; *cur>='0' && *cur<='9'; ++cur) {
+      unsigned long tmp=l*10ul+*cur-'0';
+      if ((unsigned short)tmp != tmp) break;
+      l=tmp;
+    }
+    if (cur>src) *dest=l;
+    return (size_t)(cur-src);
   } else {
     register const char *tmp=src;
     register unsigned short int l=0;