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-rw-r--r--absl/strings/substitute.cc55
-rw-r--r--absl/strings/substitute.h18
-rw-r--r--absl/strings/substitute_test.cc18
3 files changed, 83 insertions, 8 deletions
diff --git a/absl/strings/substitute.cc b/absl/strings/substitute.cc
index f739f8c2..3b200594 100644
--- a/absl/strings/substitute.cc
+++ b/absl/strings/substitute.cc
@@ -94,6 +94,7 @@ void SubstituteAndAppendArray(std::string* output, absl::string_view format,
assert(target == output->data() + output->size());
}
+static const char kHexDigits[] = "0123456789abcdef";
Arg::Arg(const void* value) {
static_assert(sizeof(scratch_) >= sizeof(value) * 2 + 2,
"fix sizeof(scratch_)");
@@ -102,7 +103,6 @@ Arg::Arg(const void* value) {
} else {
char* ptr = scratch_ + sizeof(scratch_);
uintptr_t num = reinterpret_cast<uintptr_t>(value);
- static const char kHexDigits[] = "0123456789abcdef";
do {
*--ptr = kHexDigits[num & 0xf];
num >>= 4;
@@ -113,5 +113,58 @@ Arg::Arg(const void* value) {
}
}
+// TODO(jorg): Don't duplicate so much code between here and str_cat.cc
+Arg::Arg(Hex hex) {
+ char* const end = &scratch_[numbers_internal::kFastToBufferSize];
+ char* writer = end;
+ uint64_t value = hex.value;
+ do {
+ *--writer = kHexDigits[value & 0xF];
+ value >>= 4;
+ } while (value != 0);
+
+ char* beg;
+ if (end - writer < hex.width) {
+ beg = end - hex.width;
+ std::fill_n(beg, writer - beg, hex.fill);
+ } else {
+ beg = writer;
+ }
+
+ piece_ = absl::string_view(beg, end - beg);
+}
+
+// TODO(jorg): Don't duplicate so much code between here and str_cat.cc
+Arg::Arg(Dec dec) {
+ assert(dec.width <= numbers_internal::kFastToBufferSize);
+ char* const end = &scratch_[numbers_internal::kFastToBufferSize];
+ char* const minfill = end - dec.width;
+ char* writer = end;
+ uint64_t value = dec.value;
+ bool neg = dec.neg;
+ while (value > 9) {
+ *--writer = '0' + (value % 10);
+ value /= 10;
+ }
+ *--writer = '0' + value;
+ if (neg) *--writer = '-';
+
+ ptrdiff_t fillers = writer - minfill;
+ if (fillers > 0) {
+ // Tricky: if the fill character is ' ', then it's <fill><+/-><digits>
+ // But...: if the fill character is '0', then it's <+/-><fill><digits>
+ bool add_sign_again = false;
+ if (neg && dec.fill == '0') { // If filling with '0',
+ ++writer; // ignore the sign we just added
+ add_sign_again = true; // and re-add the sign later.
+ }
+ writer -= fillers;
+ std::fill_n(writer, fillers, dec.fill);
+ if (add_sign_again) *--writer = '-';
+ }
+
+ piece_ = absl::string_view(writer, end - writer);
+}
+
} // namespace substitute_internal
} // namespace absl
diff --git a/absl/strings/substitute.h b/absl/strings/substitute.h
index 5596a5db..5747d384 100644
--- a/absl/strings/substitute.h
+++ b/absl/strings/substitute.h
@@ -76,7 +76,7 @@
#include "absl/strings/ascii.h"
#include "absl/strings/escaping.h"
#include "absl/strings/numbers.h"
-#include "absl/strings/str_join.h"
+#include "absl/strings/str_cat.h"
#include "absl/strings/str_split.h"
#include "absl/strings/string_view.h"
#include "absl/strings/strip.h"
@@ -113,10 +113,10 @@ class Arg {
// what to do.
Arg(char value) // NOLINT(runtime/explicit)
: piece_(scratch_, 1) { scratch_[0] = value; }
- Arg(short value) // NOLINT(runtime/explicit)
+ Arg(short value) // NOLINT(*)
: piece_(scratch_,
numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
- Arg(unsigned short value) // NOLINT(runtime/explicit)
+ Arg(unsigned short value) // NOLINT(*)
: piece_(scratch_,
numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
Arg(int value) // NOLINT(runtime/explicit)
@@ -125,16 +125,16 @@ class Arg {
Arg(unsigned int value) // NOLINT(runtime/explicit)
: piece_(scratch_,
numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
- Arg(long value) // NOLINT(runtime/explicit)
+ Arg(long value) // NOLINT(*)
: piece_(scratch_,
numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
- Arg(unsigned long value) // NOLINT(runtime/explicit)
+ Arg(unsigned long value) // NOLINT(*)
: piece_(scratch_,
numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
- Arg(long long value) // NOLINT(runtime/explicit)
+ Arg(long long value) // NOLINT(*)
: piece_(scratch_,
numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
- Arg(unsigned long long value) // NOLINT(runtime/explicit)
+ Arg(unsigned long long value) // NOLINT(*)
: piece_(scratch_,
numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {}
Arg(float value) // NOLINT(runtime/explicit)
@@ -145,6 +145,10 @@ class Arg {
}
Arg(bool value) // NOLINT(runtime/explicit)
: piece_(value ? "true" : "false") {}
+
+ Arg(Hex hex); // NOLINT(runtime/explicit)
+ Arg(Dec dec); // NOLINT(runtime/explicit)
+
// `void*` values, with the exception of `char*`, are printed as
// "0x<hex value>". However, in the case of `nullptr`, "NULL" is printed.
Arg(const void* value); // NOLINT(runtime/explicit)
diff --git a/absl/strings/substitute_test.cc b/absl/strings/substitute_test.cc
index 7c9af6b2..144df01e 100644
--- a/absl/strings/substitute_test.cc
+++ b/absl/strings/substitute_test.cc
@@ -43,6 +43,24 @@ TEST(SubstituteTest, Substitute) {
-1234567890, 3234567890U, -1234567890L, 3234567890UL,
-int64_t{1234567890123456789}, uint64_t{9234567890123456789u}));
+ // Hex format
+ EXPECT_EQ("0 1 f ffff0ffff 0123456789abcdef",
+ absl::Substitute("$0$1$2$3$4 $5", //
+ absl::Hex(0), absl::Hex(1, absl::kSpacePad2),
+ absl::Hex(0xf, absl::kSpacePad2),
+ absl::Hex(int16_t{-1}, absl::kSpacePad5),
+ absl::Hex(int16_t{-1}, absl::kZeroPad5),
+ absl::Hex(0x123456789abcdef, absl::kZeroPad16)));
+
+ // Dec format
+ EXPECT_EQ("0 115 -1-0001 81985529216486895",
+ absl::Substitute("$0$1$2$3$4 $5", //
+ absl::Dec(0), absl::Dec(1, absl::kSpacePad2),
+ absl::Dec(0xf, absl::kSpacePad2),
+ absl::Dec(int16_t{-1}, absl::kSpacePad5),
+ absl::Dec(int16_t{-1}, absl::kZeroPad5),
+ absl::Dec(0x123456789abcdef, absl::kZeroPad16)));
+
// Pointer.
const int* int_p = reinterpret_cast<const int*>(0x12345);
std::string str = absl::Substitute("$0", int_p);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 15:07:01 +0000