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path: root/absl/strings/internal/str_format/float_conversion.cc
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Diffstat (limited to 'absl/strings/internal/str_format/float_conversion.cc')
-rw-r--r--absl/strings/internal/str_format/float_conversion.cc110
1 files changed, 51 insertions, 59 deletions
diff --git a/absl/strings/internal/str_format/float_conversion.cc b/absl/strings/internal/str_format/float_conversion.cc
index d5a1ee40..d6858cff 100644
--- a/absl/strings/internal/str_format/float_conversion.cc
+++ b/absl/strings/internal/str_format/float_conversion.cc
@@ -403,70 +403,62 @@ bool FloatToSink(const Float v, const ConversionSpec &conv,
Buffer buffer;
- switch (conv.conversion_char()) {
- case ConversionChar::f:
- case ConversionChar::F:
- if (!FloatToBuffer<FormatStyle::Fixed>(decomposed, precision, &buffer,
- nullptr)) {
- return FallbackToSnprintf(v, conv, sink);
- }
- if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back();
- break;
+ FormatConversionChar c = conv.conversion_char();
- case ConversionChar::e:
- case ConversionChar::E:
- if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer,
- &exp)) {
- return FallbackToSnprintf(v, conv, sink);
+ if (c == FormatConversionCharInternal::f ||
+ c == FormatConversionCharInternal::F) {
+ if (!FloatToBuffer<FormatStyle::Fixed>(decomposed, precision, &buffer,
+ nullptr)) {
+ return FallbackToSnprintf(v, conv, sink);
+ }
+ if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back();
+ } else if (c == FormatConversionCharInternal::e ||
+ c == FormatConversionCharInternal::E) {
+ if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer,
+ &exp)) {
+ return FallbackToSnprintf(v, conv, sink);
+ }
+ if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back();
+ PrintExponent(
+ exp, FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e',
+ &buffer);
+ } else if (c == FormatConversionCharInternal::g ||
+ c == FormatConversionCharInternal::G) {
+ precision = std::max(0, precision - 1);
+ if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer,
+ &exp)) {
+ return FallbackToSnprintf(v, conv, sink);
+ }
+ if (precision + 1 > exp && exp >= -4) {
+ if (exp < 0) {
+ // Have 1.23456, needs 0.00123456
+ // Move the first digit
+ buffer.begin[1] = *buffer.begin;
+ // Add some zeros
+ for (; exp < -1; ++exp) *buffer.begin-- = '0';
+ *buffer.begin-- = '.';
+ *buffer.begin = '0';
+ } else if (exp > 0) {
+ // Have 1.23456, needs 1234.56
+ // Move the '.' exp positions to the right.
+ std::rotate(buffer.begin + 1, buffer.begin + 2, buffer.begin + exp + 2);
}
- if (!conv.has_alt_flag() && buffer.back() == '.') buffer.pop_back();
+ exp = 0;
+ }
+ if (!conv.has_alt_flag()) {
+ while (buffer.back() == '0') buffer.pop_back();
+ if (buffer.back() == '.') buffer.pop_back();
+ }
+ if (exp) {
PrintExponent(
exp, FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e',
&buffer);
- break;
-
- case ConversionChar::g:
- case ConversionChar::G:
- precision = std::max(0, precision - 1);
- if (!FloatToBuffer<FormatStyle::Precision>(decomposed, precision, &buffer,
- &exp)) {
- return FallbackToSnprintf(v, conv, sink);
- }
- if (precision + 1 > exp && exp >= -4) {
- if (exp < 0) {
- // Have 1.23456, needs 0.00123456
- // Move the first digit
- buffer.begin[1] = *buffer.begin;
- // Add some zeros
- for (; exp < -1; ++exp) *buffer.begin-- = '0';
- *buffer.begin-- = '.';
- *buffer.begin = '0';
- } else if (exp > 0) {
- // Have 1.23456, needs 1234.56
- // Move the '.' exp positions to the right.
- std::rotate(buffer.begin + 1, buffer.begin + 2,
- buffer.begin + exp + 2);
- }
- exp = 0;
- }
- if (!conv.has_alt_flag()) {
- while (buffer.back() == '0') buffer.pop_back();
- if (buffer.back() == '.') buffer.pop_back();
- }
- if (exp) {
- PrintExponent(
- exp,
- FormatConversionCharIsUpper(conv.conversion_char()) ? 'E' : 'e',
- &buffer);
- }
- break;
-
- case ConversionChar::a:
- case ConversionChar::A:
- return FallbackToSnprintf(v, conv, sink);
-
- default:
- return false;
+ }
+ } else if (c == FormatConversionCharInternal::a ||
+ c == FormatConversionCharInternal::A) {
+ return FallbackToSnprintf(v, conv, sink);
+ } else {
+ return false;
}
WriteBufferToSink(sign_char,