url/url_parse_internal.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef URL_URL_PARSE_INTERNAL_H_
   6 #define URL_URL_PARSE_INTERNAL_H_
   7
   8 // Contains common inline helper functions used by the URL parsing routines.
   9
  10 #include "url/url_parse.h"
  11
  12 namespace url {
  13
  14 // We treat slashes and backslashes the same for IE compatability.
  15 inline bool IsURLSlash(base::char16 ch) {
  16   return ch == '/' || ch == '\\';
  17 }
  18
  19 // Returns true if we should trim this character from the URL because it is a
  20 // space or a control character.
  21 inline bool ShouldTrimFromURL(base::char16 ch) {
  22   return ch <= ' ';
  23 }
  24
  25 // Given an already-initialized begin index and length, this shrinks the range
  26 // to eliminate "should-be-trimmed" characters. Note that the length does *not*
  27 // indicate the length of untrimmed data from |*begin|, but rather the position
  28 // in the input string (so the string starts at character |*begin| in the spec,
  29 // and goes until |*len|).
  30 template<typename CHAR>
  31 inline void TrimURL(const CHAR* spec, int* begin, int* len,
  32                     bool trim_path_end = true) {
  33   // Strip leading whitespace and control characters.
  34   while (*begin < *len && ShouldTrimFromURL(spec[*begin]))
  35     (*begin)++;
  36
  37   if (trim_path_end) {
  38     // Strip trailing whitespace and control characters. We need the >i test
  39     // for when the input string is all blanks; we don't want to back past the
  40     // input.
  41     while (*len > *begin && ShouldTrimFromURL(spec[*len - 1]))
  42       (*len)--;
  43   }
  44 }
  45
  46 // Counts the number of consecutive slashes starting at the given offset
  47 // in the given string of the given length.
  48 template<typename CHAR>
  49 inline int CountConsecutiveSlashes(const CHAR *str,
  50                                    int begin_offset, int str_len) {
  51   int count = 0;
  52   while (begin_offset + count < str_len &&
  53          IsURLSlash(str[begin_offset + count]))
  54     ++count;
  55   return count;
  56 }
  57
  58 // Internal functions in url_parse.cc that parse the path, that is, everything
  59 // following the authority section. The input is the range of everything
  60 // following the authority section, and the output is the identified ranges.
  61 //
  62 // This is designed for the file URL parser or other consumers who may do
  63 // special stuff at the beginning, but want regular path parsing, it just
  64 // maps to the internal parsing function for paths.
  65 void ParsePathInternal(const char* spec,
  66                        const Component& path,
  67                        Component* filepath,
  68                        Component* query,
  69                        Component* ref);
  70 void ParsePathInternal(const base::char16* spec,
  71                        const Component& path,
  72                        Component* filepath,
  73                        Component* query,
  74                        Component* ref);
  75
  76
  77 // Given a spec and a pointer to the character after the colon following the
  78 // scheme, this parses it and fills in the structure, Every item in the parsed
  79 // structure is filled EXCEPT for the scheme, which is untouched.
  80 void ParseAfterScheme(const char* spec,
  81                       int spec_len,
  82                       int after_scheme,
  83                       Parsed* parsed);
  84 void ParseAfterScheme(const base::char16* spec,
  85                       int spec_len,
  86                       int after_scheme,
  87                       Parsed* parsed);
  88
  89 }  // namespace url
  90
  91 #endif  // URL_URL_PARSE_INTERNAL_H_