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Make precision and alignment work together.

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This commit is contained in:
Victor Zverovich 2014-06-21 08:18:05 -07:00
parent f430516d3f
commit 6238f2daa1
2 changed files with 20 additions and 10 deletions
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24
format.h
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@ -1310,21 +1310,28 @@ typename fmt::BasicWriter<Char>::CharPtr
unsigned num_digits, const Spec &spec,
const char *prefix, unsigned prefix_size) {
unsigned width = spec.width();
Alignment align = spec.align();
if (spec.precision() > static_cast<int>(num_digits)) {
// Octal prefix '0' is counted as a digit, so ignore it if precision
// is specified.
if (prefix_size > 0 && prefix[prefix_size - 1] == '0')
--prefix_size;
unsigned number_size = prefix_size + spec.precision();
if (number_size < width) {
buffer_.reserve(width);
unsigned size = width - number_size;
CharPtr p = GrowBuffer(size);
std::fill(p, p + size, spec.fill());
// TODO: take alignment into account
AlignSpec subspec(number_size, '0', ALIGN_NUMERIC);
if (number_size >= width)
return PrepareBufferForInt(num_digits, subspec, prefix, prefix_size);
buffer_.reserve(width);
unsigned fill_size = width - number_size;
if (align != ALIGN_LEFT) {
CharPtr p = GrowBuffer(fill_size);
std::fill(p, p + fill_size, spec.fill());
}
return PrepareBufferForInt(num_digits,
AlignSpec(number_size, '0', ALIGN_NUMERIC), prefix, prefix_size);
CharPtr result = PrepareBufferForInt(num_digits, subspec, prefix, prefix_size);
if (align == ALIGN_LEFT) {
CharPtr p = GrowBuffer(fill_size);
std::fill(p, p + fill_size, spec.fill());
}
return result;
}
unsigned size = prefix_size + num_digits;
if (width <= size) {
@ -1334,7 +1341,6 @@ typename fmt::BasicWriter<Char>::CharPtr
}
CharPtr p = GrowBuffer(width);
CharPtr end = p + width;
Alignment align = spec.align();
// TODO: error if fill is not convertible to Char
Char fill = static_cast<Char>(spec.fill());
if (align == ALIGN_LEFT) {

6
test/printf-test.cc
View File

@ -241,7 +241,11 @@ TEST(PrintfTest, Precision) {
EXPECT_PRINTF(" 00042", "%7.5o", 042);
EXPECT_PRINTF(" 00042", "%#10.5o", 042);
// TODO: test left alignment
EXPECT_PRINTF("00042 ", "%-7.5d", 42);
EXPECT_PRINTF("00042 ", "%-7.5x", 0x42);
EXPECT_PRINTF("0x00042 ", "%-#10.5x", 0x42);
EXPECT_PRINTF("00042 ", "%-7.5o", 042);
EXPECT_PRINTF("00042 ", "%-#10.5o", 042);
}
// TODO: test length and type specifier