Use some FXSYS methods instead of duplicating

This CL uses the FXSYS_isDecimalDigit in place of a few custom IsDigit methods.
It also creates an iswspace and some fractional math helper methods to share
some code.

Review-Url: https://codereview.chromium.org/2094453004

2 files changed, 21 insertions, 6 deletions

diff --git a/core/fxcrt/fx_basic_util.cpp b/core/fxcrt/fx_basic_util.cpp
index b9cf470d08..12d3aefd1c 100644
--- a/core/fxcrt/fx_basic_util.cpp
+++ b/core/fxcrt/fx_basic_util.cpp
@@ -47,6 +47,18 @@ void FX_atonum(const CFX_ByteStringC& strc, FX_BOOL& bInteger, void* pData) {
   }
 }
 
+static const FX_FLOAT fraction_scales[] = {
+    0.1f,         0.01f,         0.001f,        0.0001f,
+    0.00001f,     0.000001f,     0.0000001f,    0.00000001f,
+    0.000000001f, 0.0000000001f, 0.00000000001f};
+int FXSYS_FractionalScaleCount() {
+  return FX_ArraySize(fraction_scales);
+}
+
+FX_FLOAT FXSYS_FractionalScale(size_t scale_factor, int value) {
+  return fraction_scales[scale_factor] * value;
+}
+
 FX_FLOAT FX_atof(const CFX_ByteStringC& strc) {
   if (strc.IsEmpty())
     return 0.0;
@@ -74,17 +86,14 @@ FX_FLOAT FX_atof(const CFX_ByteStringC& strc) {
     value = value * 10 + FXSYS_toDecimalDigit(strc.CharAt(cc));
     cc++;
   }
-  static const FX_FLOAT fraction_scales[] = {
-      0.1f,         0.01f,         0.001f,        0.0001f,
-      0.00001f,     0.000001f,     0.0000001f,    0.00000001f,
-      0.000000001f, 0.0000000001f, 0.00000000001f};
   int scale = 0;
   if (cc < len && strc[cc] == '.') {
     cc++;
     while (cc < len) {
-      value += fraction_scales[scale] * FXSYS_toDecimalDigit(strc.CharAt(cc));
+      value +=
+          FXSYS_FractionalScale(scale, FXSYS_toDecimalDigit(strc.CharAt(cc)));
       scale++;
-      if (scale == FX_ArraySize(fraction_scales))
+      if (scale == FXSYS_FractionalScaleCount())
         break;
       cc++;
     }
diff --git a/core/fxcrt/include/fx_ext.h b/core/fxcrt/include/fx_ext.h
index d37db67d4a..f7aca68d64 100644
--- a/core/fxcrt/include/fx_ext.h
+++ b/core/fxcrt/include/fx_ext.h
@@ -53,6 +53,9 @@ inline bool FXSYS_iswdigit(wchar_t wch) {
 inline bool FXSYS_iswalnum(wchar_t wch) {
   return FXSYS_iswalpha(wch) || FXSYS_iswdigit(wch);
 }
+inline bool FXSYS_iswspace(FX_WCHAR c) {
+  return (c == 0x20) || (c == 0x0d) || (c == 0x0a) || (c == 0x09);
+}
 
 inline int FXSYS_toHexDigit(const FX_CHAR c) {
   if (!std::isxdigit(c))
@@ -77,6 +80,9 @@ inline int FXSYS_toDecimalDigit(const FX_WCHAR c) {
   return std::iswdigit(c) ? c - L'0' : 0;
 }
 
+FX_FLOAT FXSYS_FractionalScale(size_t scale_factor, int value);
+int FXSYS_FractionalScaleCount();
+
 uint32_t FX_HashCode_GetA(const CFX_ByteStringC& str, bool bIgnoreCase);
 uint32_t FX_HashCode_GetW(const CFX_WideStringC& Str, bool bIgnoreCase);