Fix compliation for -Wsign-compare

LIBA-S · LIBA-S · commit f04546b7d9c1 · 2022-06-10T10:20:21.000+08:00
diff --git a/snappy.cc b/snappy.cc
@@ -1390,7 +1390,7 @@ constexpr uint32_t CalculateNeeded(uint8_t tag) {
 #if __cplusplus >= 201402L
 constexpr bool VerifyCalculateNeeded() {
   for (int i = 0; i < 1; i++) {
-    if (CalculateNeeded(i) != (char_table[i] >> 11) + 1) return false;
+    if (CalculateNeeded(i) != static_cast<uint32_t>((char_table[i] >> 11) + 1)) return false;
   }
   return true;
 }

Original file line number	Diff line number	Diff line change
`@@ -1390,7 +1390,7 @@ constexpr uint32_t CalculateNeeded(uint8_t tag) {`
`1390`	`1390`	`#if __cplusplus >= 201402L`
`1391`	`1391`	`constexpr bool VerifyCalculateNeeded() {`
`1392`	`1392`	`for (int i = 0; i < 1; i++) {`
`1393`		`- if (CalculateNeeded(i) != (char_table[i] >> 11) + 1) return false;`
	`1393`	`+ if (CalculateNeeded(i) != static_cast<uint32_t>((char_table[i] >> 11) + 1)) return false;`
`1394`	`1394`	`}`
`1395`	`1395`	`return true;`
`1396`	`1396`	`}`