Deduplicate rtl_*str_valueOf{Float,Double}

Change-Id: Ie3254fbf6178f4e623fd8209b58e9f19d2c46d2c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/130480
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

3 files changed, 28 insertions, 48 deletions

diff --git a/sal/rtl/string.cxx b/sal/rtl/string.cxx
index 86cfdb1672d9..ab59eab78c77 100644
--- a/sal/rtl/string.cxx
+++ b/sal/rtl/string.cxx
@@ -64,35 +64,13 @@ rtl_String rtl::str::EmptyStringImpl<rtl_String>::data =
 sal_Int32 SAL_CALL rtl_str_valueOfFloat(char * pStr, float f)
     SAL_THROW_EXTERN_C()
 {
-    assert(pStr);
-    rtl_String * pResult = nullptr;
-    sal_Int32 nLen;
-    rtl_math_doubleToString(
-        &pResult, nullptr, 0, f, rtl_math_StringFormat_G,
-        RTL_STR_MAX_VALUEOFFLOAT - RTL_CONSTASCII_LENGTH("-x.E-xxx"), '.', nullptr, 0,
-        true);
-    nLen = pResult->length;
-    OSL_ASSERT(nLen < RTL_STR_MAX_VALUEOFFLOAT);
-    memcpy(pStr, pResult->buffer, (nLen + 1) * sizeof(char));
-    rtl_string_release(pResult);
-    return nLen;
+    return rtl::str::valueOfFP<RTL_STR_MAX_VALUEOFFLOAT>(pStr, f, &rtl_math_doubleToString);
 }
 
 sal_Int32 SAL_CALL rtl_str_valueOfDouble(char * pStr, double d)
     SAL_THROW_EXTERN_C()
 {
-    assert(pStr);
-    rtl_String * pResult = nullptr;
-    sal_Int32 nLen;
-    rtl_math_doubleToString(
-        &pResult, nullptr, 0, d, rtl_math_StringFormat_G,
-        RTL_STR_MAX_VALUEOFDOUBLE - RTL_CONSTASCII_LENGTH("-x.E-xxx"), '.', nullptr,
-        0, true);
-    nLen = pResult->length;
-    OSL_ASSERT(nLen < RTL_STR_MAX_VALUEOFDOUBLE);
-    memcpy(pStr, pResult->buffer, (nLen + 1) * sizeof(char));
-    rtl_string_release(pResult);
-    return nLen;
+    return rtl::str::valueOfFP<RTL_STR_MAX_VALUEOFDOUBLE>(pStr, d, &rtl_math_doubleToString);
 }
 
 float SAL_CALL rtl_str_toFloat(char const * pStr) SAL_THROW_EXTERN_C()
diff --git a/sal/rtl/strtmpl.hxx b/sal/rtl/strtmpl.hxx
index 2e11ffd0161f..8901f3ace2b2 100644
--- a/sal/rtl/strtmpl.hxx
+++ b/sal/rtl/strtmpl.hxx
@@ -1663,6 +1663,30 @@ void newReplaceAllFromIndex(S** s, S* s1, CharTypeFrom const* from, sal_Int32 fr
     RTL_LOG_STRING_NEW(*s);
 }
 
+template <class IMPL_RTL_STRINGDATA>
+using doubleToString_t
+    = void(SAL_CALL*)(IMPL_RTL_STRINGDATA** pResult, sal_Int32* pResultCapacity,
+                      sal_Int32 nResultOffset, double fValue, rtl_math_StringFormat eFormat,
+                      sal_Int32 nDecPlaces, STRCODE<IMPL_RTL_STRINGDATA> cDecSeparator,
+                      sal_Int32 const* pGroups, STRCODE<IMPL_RTL_STRINGDATA> cGroupSeparator,
+                      sal_Bool bEraseTrailingDecZeros) SAL_THROW_EXTERN_C();
+
+template <sal_Int32 maxLen, typename T, typename IMPL_RTL_STRINGDATA>
+sal_Int32 SAL_CALL valueOfFP(STRCODE<IMPL_RTL_STRINGDATA>* pStr, T f,
+                             doubleToString_t<IMPL_RTL_STRINGDATA> doubleToString)
+{
+    assert(pStr);
+    IMPL_RTL_STRINGDATA* pResult = nullptr;
+    sal_Int32 nLen;
+    doubleToString(&pResult, nullptr, 0, f, rtl_math_StringFormat_G,
+                   maxLen - RTL_CONSTASCII_LENGTH("-x.E-xxx"), '.', nullptr, 0, true);
+    nLen = pResult->length;
+    OSL_ASSERT(nLen < maxLen);
+    Copy(pStr, pResult->buffer, nLen + 1);
+    release(pResult);
+    return nLen;
+}
+
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sal/rtl/ustring.cxx b/sal/rtl/ustring.cxx
index 2ea2eb142d7f..b5fc3685c48b 100644
--- a/sal/rtl/ustring.cxx
+++ b/sal/rtl/ustring.cxx
@@ -121,35 +121,13 @@ sal_Int32 rtl_ustr_lastIndexOfAscii_WithLength(
 sal_Int32 SAL_CALL rtl_ustr_valueOfFloat(sal_Unicode * pStr, float f)
     SAL_THROW_EXTERN_C()
 {
-    assert(pStr);
-    rtl_uString * pResult = nullptr;
-    sal_Int32 nLen;
-    rtl_math_doubleToUString(
-        &pResult, nullptr, 0, f, rtl_math_StringFormat_G,
-        RTL_USTR_MAX_VALUEOFFLOAT - RTL_CONSTASCII_LENGTH("-x.E-xxx"), '.', nullptr,
-        0, true);
-    nLen = pResult->length;
-    OSL_ASSERT(nLen < RTL_USTR_MAX_VALUEOFFLOAT);
-    memcpy(pStr, pResult->buffer, (nLen + 1) * sizeof(sal_Unicode));
-    rtl_uString_release(pResult);
-    return nLen;
+    return rtl::str::valueOfFP<RTL_USTR_MAX_VALUEOFFLOAT>(pStr, f, &rtl_math_doubleToUString);
 }
 
 sal_Int32 SAL_CALL rtl_ustr_valueOfDouble(sal_Unicode * pStr, double d)
     SAL_THROW_EXTERN_C()
 {
-    assert(pStr);
-    rtl_uString * pResult = nullptr;
-    sal_Int32 nLen;
-    rtl_math_doubleToUString(
-        &pResult, nullptr, 0, d, rtl_math_StringFormat_G,
-        RTL_USTR_MAX_VALUEOFDOUBLE - RTL_CONSTASCII_LENGTH("-x.E-xxx"), '.', nullptr,
-        0, true);
-    nLen = pResult->length;
-    OSL_ASSERT(nLen < RTL_USTR_MAX_VALUEOFDOUBLE);
-    memcpy(pStr, pResult->buffer, (nLen + 1) * sizeof(sal_Unicode));
-    rtl_uString_release(pResult);
-    return nLen;
+    return rtl::str::valueOfFP<RTL_USTR_MAX_VALUEOFDOUBLE>(pStr, d, &rtl_math_doubleToUString);
 }
 
 namespace {