diff options
author | 2017-09-27 10:50:48 -0700 | |
---|---|---|
committer | 2017-09-27 16:03:52 -0400 | |
commit | cdf20caa491f59c0a35a8d8fbec0d948e4bc7e4c (patch) | |
tree | 1d3dc27123440a6745c85bc6ae8265da0891a56b /absl/strings/strip.cc | |
parent | 7a64d73e1ef61b15971f8cc90876a5128729b0d4 (diff) |
Changes imported from Abseil "staging" branch:
- 43853019b439efb32c79d5d50e24508588e1bbe0 Undo the not applying qualifications to absl types in enc... by Derek Mauro <dmauro@google.com>
- 06d62a10621c9864279ee57097069cfe3cb7b42a fix capitalization by Abseil Team <absl-team@google.com>
- 22adbfee340bb452ba38b68975ade6f072859c4a Fix indices in str_split.h comments. by Derek Mauro <dmauro@google.com>
- ae5143a559ad8633a78cd76620e30a781006d088 Fix the inconsistent licenses directives in the BUILD fil... by Derek Mauro <dmauro@google.com>
- 0a76a3653b2ecfdad433d3e2f5b651c4ecdcf74b Remove strip.cc, fastmem.h, and fastmem_test.cc from the ... by Derek Mauro <dmauro@google.com>
- 77908cfce5927aabca1f8d62481106f22cfc1936 Internal change. by Derek Mauro <dmauro@google.com>
- d3277b4171f37e22ab346becb5e295c36c7a0219 Be consistent in (not) applying qualifications for enclos... by Abseil Team <absl-team@google.com>
- 9ec7f8164e7d6a5f64288a7360a346628393cc50 Add std:: qualification to isnan and isinf in duration_te... by Derek Mauro <dmauro@google.com>
- 9f7c87d7764ddba05286fabca1f4f15285f3250a Fix typos in string_view comments. by Abseil Team <absl-team@google.com>
- 281860804f8053143d969b99876e3dbc6deb1236 Fix typo in container.h docs. by Abseil Team <absl-team@google.com>
- 0b0a9388c7a9d7f72349d44b5b46132f45bde56c Add bazel-* symlinks to gitignore. by Michael Pratt <mpratt@google.com>
GitOrigin-RevId: 43853019b439efb32c79d5d50e24508588e1bbe0
Change-Id: I9e74a5430816a34ecf1acb86486ed3b0bd12a1d6
Diffstat (limited to 'absl/strings/strip.cc')
-rw-r--r-- | absl/strings/strip.cc | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/absl/strings/strip.cc b/absl/strings/strip.cc deleted file mode 100644 index adc219f1..00000000 --- a/absl/strings/strip.cc +++ /dev/null @@ -1,268 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// This file contains functions that remove a defined part from the std::string, -// i.e., strip the std::string. - -#include "absl/strings/strip.h" - -#include <algorithm> -#include <cstring> -#include <string> - -#include "absl/strings/ascii.h" -#include "absl/strings/string_view.h" - -// ---------------------------------------------------------------------- -// ReplaceCharacters -// Replaces any occurrence of the character 'remove' (or the characters -// in 'remove') with the character 'replace_with'. -// ---------------------------------------------------------------------- -void ReplaceCharacters(char* str, size_t len, absl::string_view remove, - char replace_with) { - for (char* end = str + len; str != end; ++str) { - if (remove.find(*str) != absl::string_view::npos) { - *str = replace_with; - } - } -} - -void ReplaceCharacters(std::string* s, absl::string_view remove, char replace_with) { - for (char& ch : *s) { - if (remove.find(ch) != absl::string_view::npos) { - ch = replace_with; - } - } -} - -bool StripTrailingNewline(std::string* s) { - if (!s->empty() && (*s)[s->size() - 1] == '\n') { - if (s->size() > 1 && (*s)[s->size() - 2] == '\r') - s->resize(s->size() - 2); - else - s->resize(s->size() - 1); - return true; - } - return false; -} - -// ---------------------------------------------------------------------- -// Misc. stripping routines -// ---------------------------------------------------------------------- -void StripCurlyBraces(std::string* s) { - return StripBrackets('{', '}', s); -} - -void StripBrackets(char left, char right, std::string* s) { - std::string::iterator opencurly = std::find(s->begin(), s->end(), left); - while (opencurly != s->end()) { - std::string::iterator closecurly = std::find(opencurly, s->end(), right); - if (closecurly == s->end()) return; - opencurly = s->erase(opencurly, closecurly + 1); - opencurly = std::find(opencurly, s->end(), left); - } -} - -void StripMarkupTags(std::string* s) { - std::string::iterator output = std::find(s->begin(), s->end(), '<'); - std::string::iterator input = output; - while (input != s->end()) { - if (*input == '<') { - input = std::find(input, s->end(), '>'); - if (input == s->end()) break; - ++input; - } else { - *output++ = *input++; - } - } - s->resize(output - s->begin()); -} - -std::string OutputWithMarkupTagsStripped(const std::string& s) { - std::string result(s); - StripMarkupTags(&result); - return result; -} - -ptrdiff_t TrimStringLeft(std::string* s, absl::string_view remove) { - size_t i = 0; - while (i < s->size() && memchr(remove.data(), (*s)[i], remove.size())) { - ++i; - } - if (i > 0) s->erase(0, i); - return i; -} - -ptrdiff_t TrimStringRight(std::string* s, absl::string_view remove) { - size_t i = s->size(), trimmed = 0; - while (i > 0 && memchr(remove.data(), (*s)[i - 1], remove.size())) { - --i; - } - if (i < s->size()) { - trimmed = s->size() - i; - s->erase(i); - } - return trimmed; -} - -// Unfortunately, absl::string_view does not have erase, so we've to replicate -// the implementation with remove_prefix()/remove_suffix() -ptrdiff_t TrimStringLeft(absl::string_view* s, absl::string_view remove) { - size_t i = 0; - while (i < s->size() && memchr(remove.data(), (*s)[i], remove.size())) { - ++i; - } - if (i > 0) s->remove_prefix(i); - return i; -} - -ptrdiff_t TrimStringRight(absl::string_view* s, absl::string_view remove) { - size_t i = s->size(), trimmed = 0; - while (i > 0 && memchr(remove.data(), (*s)[i - 1], remove.size())) { - --i; - } - if (i < s->size()) { - trimmed = s->size() - i; - s->remove_suffix(trimmed); - } - return trimmed; -} - -// ---------------------------------------------------------------------- -// Various removal routines -// ---------------------------------------------------------------------- -ptrdiff_t strrm(char* str, char c) { - char* src; - char* dest; - for (src = dest = str; *src != '\0'; ++src) - if (*src != c) *(dest++) = *src; - *dest = '\0'; - return dest - str; -} - -ptrdiff_t memrm(char* str, ptrdiff_t strlen, char c) { - char* src; - char* dest; - for (src = dest = str; strlen-- > 0; ++src) - if (*src != c) *(dest++) = *src; - return dest - str; -} - -ptrdiff_t strrmm(char* str, const char* chars) { - char* src; - char* dest; - for (src = dest = str; *src != '\0'; ++src) { - bool skip = false; - for (const char* c = chars; *c != '\0'; c++) { - if (*src == *c) { - skip = true; - break; - } - } - if (!skip) *(dest++) = *src; - } - *dest = '\0'; - return dest - str; -} - -ptrdiff_t strrmm(std::string* str, const std::string& chars) { - size_t str_len = str->length(); - size_t in_index = str->find_first_of(chars); - if (in_index == std::string::npos) return str_len; - - size_t out_index = in_index++; - - while (in_index < str_len) { - char c = (*str)[in_index++]; - if (chars.find(c) == std::string::npos) (*str)[out_index++] = c; - } - - str->resize(out_index); - return out_index; -} - -// ---------------------------------------------------------------------- -// StripDupCharacters -// Replaces any repeated occurrence of the character 'dup_char' -// with single occurrence. e.g., -// StripDupCharacters("a//b/c//d", '/', 0) => "a/b/c/d" -// Return the number of characters removed -// ---------------------------------------------------------------------- -ptrdiff_t StripDupCharacters(std::string* s, char dup_char, ptrdiff_t start_pos) { - if (start_pos < 0) start_pos = 0; - - // remove dups by compaction in-place - ptrdiff_t input_pos = start_pos; // current reader position - ptrdiff_t output_pos = start_pos; // current writer position - const ptrdiff_t input_end = s->size(); - while (input_pos < input_end) { - // keep current character - const char curr_char = (*s)[input_pos]; - if (output_pos != input_pos) // must copy - (*s)[output_pos] = curr_char; - ++input_pos; - ++output_pos; - - if (curr_char == dup_char) { // skip subsequent dups - while ((input_pos < input_end) && ((*s)[input_pos] == dup_char)) - ++input_pos; - } - } - const ptrdiff_t num_deleted = input_pos - output_pos; - s->resize(s->size() - num_deleted); - return num_deleted; -} - -// ---------------------------------------------------------------------- -// TrimRunsInString -// Removes leading and trailing runs, and collapses middle -// runs of a set of characters into a single character (the -// first one specified in 'remove'). Useful for collapsing -// runs of repeated delimiters, whitespace, etc. E.g., -// TrimRunsInString(&s, " :,()") removes leading and trailing -// delimiter chars and collapses and converts internal runs -// of delimiters to single ' ' characters, so, for example, -// " a:(b):c " -> "a b c" -// "first,last::(area)phone, ::zip" -> "first last area phone zip" -// ---------------------------------------------------------------------- -void TrimRunsInString(std::string* s, absl::string_view remove) { - std::string::iterator dest = s->begin(); - std::string::iterator src_end = s->end(); - for (std::string::iterator src = s->begin(); src != src_end;) { - if (remove.find(*src) == absl::string_view::npos) { - *(dest++) = *(src++); - } else { - // Skip to the end of this run of chars that are in 'remove'. - for (++src; src != src_end; ++src) { - if (remove.find(*src) == absl::string_view::npos) { - if (dest != s->begin()) { - // This is an internal run; collapse it. - *(dest++) = remove[0]; - } - *(dest++) = *(src++); - break; - } - } - } - } - s->erase(dest, src_end); -} - -// ---------------------------------------------------------------------- -// RemoveNullsInString -// Removes any internal \0 characters from the std::string. -// ---------------------------------------------------------------------- -void RemoveNullsInString(std::string* s) { - s->erase(std::remove(s->begin(), s->end(), '\0'), s->end()); -} |