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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/strings/string_split.h"
#include <stddef.h>
#include "base/logging.h"
#include "base/strings/string_split_internal.h"
#include "base/strings/string_util.h"
#include "base/third_party/icu/icu_utf.h"
namespace base {
namespace {
bool AppendStringKeyValue(StringPiece input,
char delimiter,
StringPairs* result) {
// Always append a new item regardless of success (it might be empty). The
// below code will copy the strings directly into the result pair.
result->resize(result->size() + 1);
auto& result_pair = result->back();
// Find the delimiter.
size_t end_key_pos = input.find_first_of(delimiter);
if (end_key_pos == std::string::npos) {
DVLOG(1) << "cannot find delimiter in: " << input;
return false; // No delimiter.
}
result_pair.first = std::string(input.substr(0, end_key_pos));
// Find the value string.
StringPiece remains = input.substr(end_key_pos, input.size() - end_key_pos);
size_t begin_value_pos = remains.find_first_not_of(delimiter);
if (begin_value_pos == StringPiece::npos) {
DVLOG(1) << "cannot parse value from input: " << input;
return false; // No value.
}
result_pair.second = std::string(
remains.substr(begin_value_pos, remains.size() - begin_value_pos));
return true;
}
} // namespace
std::vector<std::string> SplitString(StringPiece input,
StringPiece separators,
WhitespaceHandling whitespace,
SplitResult result_type) {
return internal::SplitStringT<std::string>(input, separators, whitespace,
result_type);
}
std::vector<std::u16string> SplitString(StringPiece16 input,
StringPiece16 separators,
WhitespaceHandling whitespace,
SplitResult result_type) {
return internal::SplitStringT<std::u16string>(input, separators, whitespace,
result_type);
}
std::vector<StringPiece> SplitStringPiece(StringPiece input,
StringPiece separators,
WhitespaceHandling whitespace,
SplitResult result_type) {
return internal::SplitStringT<StringPiece>(input, separators, whitespace,
result_type);
}
std::vector<StringPiece16> SplitStringPiece(StringPiece16 input,
StringPiece16 separators,
WhitespaceHandling whitespace,
SplitResult result_type) {
return internal::SplitStringT<StringPiece16>(input, separators, whitespace,
result_type);
}
bool SplitStringIntoKeyValuePairs(StringPiece input,
char key_value_delimiter,
char key_value_pair_delimiter,
StringPairs* key_value_pairs) {
return SplitStringIntoKeyValuePairsUsingSubstr(
input, key_value_delimiter, StringPiece(&key_value_pair_delimiter, 1),
key_value_pairs);
}
bool SplitStringIntoKeyValuePairsUsingSubstr(
StringPiece input,
char key_value_delimiter,
StringPiece key_value_pair_delimiter,
StringPairs* key_value_pairs) {
key_value_pairs->clear();
std::vector<StringPiece> pairs = SplitStringPieceUsingSubstr(
input, key_value_pair_delimiter, TRIM_WHITESPACE, SPLIT_WANT_NONEMPTY);
key_value_pairs->reserve(pairs.size());
bool success = true;
for (const StringPiece& pair : pairs) {
if (!AppendStringKeyValue(pair, key_value_delimiter, key_value_pairs)) {
// Don't return here, to allow for pairs without associated
// value or key; just record that the split failed.
success = false;
}
}
return success;
}
std::vector<std::u16string> SplitStringUsingSubstr(
StringPiece16 input,
StringPiece16 delimiter,
WhitespaceHandling whitespace,
SplitResult result_type) {
return internal::SplitStringUsingSubstrT<std::u16string>(
input, delimiter, whitespace, result_type);
}
std::vector<std::string> SplitStringUsingSubstr(StringPiece input,
StringPiece delimiter,
WhitespaceHandling whitespace,
SplitResult result_type) {
return internal::SplitStringUsingSubstrT<std::string>(
input, delimiter, whitespace, result_type);
}
std::vector<StringPiece16> SplitStringPieceUsingSubstr(
StringPiece16 input,
StringPiece16 delimiter,
WhitespaceHandling whitespace,
SplitResult result_type) {
std::vector<StringPiece16> result;
return internal::SplitStringUsingSubstrT<StringPiece16>(
input, delimiter, whitespace, result_type);
}
std::vector<StringPiece> SplitStringPieceUsingSubstr(
StringPiece input,
StringPiece delimiter,
WhitespaceHandling whitespace,
SplitResult result_type) {
return internal::SplitStringUsingSubstrT<StringPiece>(
input, delimiter, whitespace, result_type);
}
} // namespace base
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