Add ParseFloat (in parsedouble.h).

Bug: 110758329 # for using here
Test: libbase_test (added float_smoke)
Change-Id: I640f85655567c707cbee625ca9c88db2ab91da66

1 files changed, 22 insertions, 5 deletions

diff --git a/base/include/android-base/parsedouble.h b/base/include/android-base/parsedouble.h
index 9a20eb194..7b1c648b7 100644
--- a/base/include/android-base/parsedouble.h
+++ b/base/include/android-base/parsedouble.h
@@ -24,15 +24,14 @@
 namespace android {
 namespace base {
 
-// Parse double value in the string 's' and sets 'out' to that value if it exists.
+// Parse floating value in the string 's' and sets 'out' to that value if it exists.
 // Optionally allows the caller to define a 'min' and 'max' beyond which
 // otherwise valid values will be rejected. Returns boolean success.
-static inline bool ParseDouble(const char* s, double* out,
-                               double min = std::numeric_limits<double>::lowest(),
-                               double max = std::numeric_limits<double>::max()) {
+template <typename T, T (*strtox)(const char* str, char** endptr)>
+static inline bool ParseFloatingPoint(const char* s, T* out, T min, T max) {
   errno = 0;
   char* end;
-  double result = strtod(s, &end);
+  T result = strtox(s, &end);
   if (errno != 0 || s == end || *end != '\0') {
     return false;
   }
@@ -45,5 +44,23 @@ static inline bool ParseDouble(const char* s, double* out,
   return true;
 }
 
+// Parse double value in the string 's' and sets 'out' to that value if it exists.
+// Optionally allows the caller to define a 'min' and 'max' beyond which
+// otherwise valid values will be rejected. Returns boolean success.
+static inline bool ParseDouble(const char* s, double* out,
+                               double min = std::numeric_limits<double>::lowest(),
+                               double max = std::numeric_limits<double>::max()) {
+  return ParseFloatingPoint<double, strtod>(s, out, min, max);
+}
+
+// Parse float value in the string 's' and sets 'out' to that value if it exists.
+// Optionally allows the caller to define a 'min' and 'max' beyond which
+// otherwise valid values will be rejected. Returns boolean success.
+static inline bool ParseFloat(const char* s, float* out,
+                              float min = std::numeric_limits<float>::lowest(),
+                              float max = std::numeric_limits<float>::max()) {
+  return ParseFloatingPoint<float, strtof>(s, out, min, max);
+}
+
 }  // namespace base
 }  // namespace android