Keep only base/extractor.[cc|h].

base/cgi.cc

-// Copyright 2004-2009 Google Inc.
-//
-// 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.
-// ========================================================================
-
-#include "omaha/base/cgi.h"
-
-#include <tchar.h>
-#include "base/basictypes.h"
-#include "omaha/base/debug.h"
-
-namespace omaha {
-
-static uint32 _needs_escape[8] = {
-  0xffffffffL,
-  0xf80008fdL,
-  0x78000001L,
-  0xb8000001L,
-  0xffffffffL,
-  0xffffffffL,
-  0xffffffffL,
-  0xffffffffL
-};
-#define needs_escape(c) (_needs_escape[(c)>>5]&(1<<((c)&31)))
-
-// Here are a couple utility methods to change ints to hex chars & back.
-inline int int_to_hex_digit(int i) {
-  ASSERT((i >= 0) && (i <= 16), (_T("")));
-  return ((i < 10) ? (i + '0') : ((i - 10) + 'A'));
-}
-
-inline int hex_digit_to_int(TCHAR c) {
-  ASSERT(isxdigit(c), (_T("")));
-  return ((c >= 'a') ? ((c - 'a') + 10) :
-          (c >= 'A') ? ((c - 'A') + 10) :
-          (c - '0'));
-}
-
-bool CGI::EscapeString(const TCHAR* src, int srcn, TCHAR* dst, int dstn) {
-  ASSERT1(src != dst);  // In-place escaping will fail.
-  ASSERT1(srcn >= 0);
-  ASSERT1(dstn >= 1);
-  dstn--;   // Number of characters we can write, not including null terminator.
-
-  int i, j;
-  for (i = 0, j = 0; i < srcn && j < dstn; i++) {
-    TCHAR c = src[i];
-    if (c == ' ') {
-      dst[j++] = '+';
-    } else if (!needs_escape(c)) {
-      dst[j++] = c;
-    } else if (j + 3 > dstn) {
-      break;  // Escape sequence will not fit.
-    } else {
-      dst[j++] = '%';
-      dst[j++] = static_cast<TCHAR>(int_to_hex_digit((c >> 4) & 0xf));
-      dst[j++] = static_cast<TCHAR>(int_to_hex_digit(c & 0xf));
-    }
-  }
-  dst[j] = '\0';
-  return i == srcn;
-}
-
-bool CGI::UnescapeString(const TCHAR* src, int srcn, TCHAR* dst, int dstn) {
-  ASSERT1(srcn >= 0);
-  ASSERT1(dstn >= 1);
-  dstn--;   // Number of characters we can write, not including null terminator.
-
-  int i, j;
-  for (i = 0, j = 0; i < srcn && j < dstn; ++j) {
-    TCHAR c = src[i++];
-    if (c == '+') {
-      dst[j] = ' ';
-    } else if (c != '%') {
-      dst[j] = c;
-    } else if (i + 2 > srcn) {
-      break;  // Escape sequence is incomplete.
-    } else if (!isxdigit(src[i]) || !isxdigit(src[i + 1])) {
-      break;  // Escape sequence isn't hex.
-    } else {
-      int num = hex_digit_to_int(src[i++]) << 4;
-      num += hex_digit_to_int(src[i++]);
-      dst[j] = static_cast<TCHAR>(num);
-    }
-  }
-  dst[j] = '\0';
-  return i == srcn;
-}
-
-}  // namespace omaha
-