38b88a4a64
Using single quotes can be more convenient -- because there's no need to escape -- but the vast majority of existing quoting was done with double quotes, so move in that direction. Bug: http://b/27524191 Change-Id: I8f58593120e4c8aeaec45e16fc0178e9c162454d
136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* 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 "linker_utils.h"
|
|
#include "linker_debug.h"
|
|
|
|
bool normalize_path(const char* path, std::string* normalized_path) {
|
|
// Input should be an absolute path
|
|
if (path[0] != '/') {
|
|
PRINT("normalize_path - invalid input: \"%s\", the input path should be absolute", path);
|
|
return false;
|
|
}
|
|
|
|
const size_t len = strlen(path) + 1;
|
|
char buf[len];
|
|
|
|
const char* in_ptr = path;
|
|
char* out_ptr = buf;
|
|
|
|
while (*in_ptr != 0) {
|
|
if (*in_ptr == '/') {
|
|
char c1 = in_ptr[1];
|
|
if (c1 == '.') {
|
|
char c2 = in_ptr[2];
|
|
if (c2 == '/') {
|
|
in_ptr += 2;
|
|
continue;
|
|
} else if (c2 == '.' && (in_ptr[3] == '/' || in_ptr[3] == 0)) {
|
|
in_ptr += 3;
|
|
while (out_ptr > buf && *--out_ptr != '/') {
|
|
}
|
|
if (in_ptr[0] == 0) {
|
|
// retain '/'
|
|
out_ptr++;
|
|
}
|
|
continue;
|
|
}
|
|
} else if (c1 == '/') {
|
|
++in_ptr;
|
|
continue;
|
|
}
|
|
}
|
|
*out_ptr++ = *in_ptr++;
|
|
}
|
|
|
|
*out_ptr = 0;
|
|
*normalized_path = buf;
|
|
return true;
|
|
}
|
|
|
|
bool file_is_in_dir(const std::string& file, const std::string& dir) {
|
|
const char* needle = dir.c_str();
|
|
const char* haystack = file.c_str();
|
|
size_t needle_len = strlen(needle);
|
|
|
|
return strncmp(haystack, needle, needle_len) == 0 &&
|
|
haystack[needle_len] == '/' &&
|
|
strchr(haystack + needle_len + 1, '/') == nullptr;
|
|
}
|
|
|
|
bool file_is_under_dir(const std::string& file, const std::string& dir) {
|
|
const char* needle = dir.c_str();
|
|
const char* haystack = file.c_str();
|
|
size_t needle_len = strlen(needle);
|
|
|
|
return strncmp(haystack, needle, needle_len) == 0 &&
|
|
haystack[needle_len] == '/';
|
|
}
|
|
|
|
const char* const kZipFileSeparator = "!/";
|
|
|
|
bool parse_zip_path(const char* input_path, std::string* zip_path, std::string* entry_path) {
|
|
std::string normalized_path;
|
|
if (!normalize_path(input_path, &normalized_path)) {
|
|
return false;
|
|
}
|
|
|
|
const char* const path = normalized_path.c_str();
|
|
TRACE("Trying zip file open from path \"%s\" -> normalized \"%s\"", input_path, path);
|
|
|
|
// Treat an '!/' separator inside a path as the separator between the name
|
|
// of the zip file on disk and the subdirectory to search within it.
|
|
// For example, if path is "foo.zip!/bar/bas/x.so", then we search for
|
|
// "bar/bas/x.so" within "foo.zip".
|
|
const char* const separator = strstr(path, kZipFileSeparator);
|
|
if (separator == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
char buf[512];
|
|
if (strlcpy(buf, path, sizeof(buf)) >= sizeof(buf)) {
|
|
PRINT("Warning: ignoring very long library path: %s", path);
|
|
return false;
|
|
}
|
|
|
|
buf[separator - path] = '\0';
|
|
|
|
*zip_path = buf;
|
|
*entry_path = &buf[separator - path + 2];
|
|
|
|
return true;
|
|
}
|
|
|
|
constexpr off64_t kPageMask = ~static_cast<off64_t>(PAGE_SIZE-1);
|
|
|
|
off64_t page_start(off64_t offset) {
|
|
return offset & kPageMask;
|
|
}
|
|
|
|
bool safe_add(off64_t* out, off64_t a, size_t b) {
|
|
CHECK(a >= 0);
|
|
if (static_cast<uint64_t>(INT64_MAX - a) < b) {
|
|
return false;
|
|
}
|
|
|
|
*out = a + b;
|
|
return true;
|
|
}
|
|
|
|
size_t page_offset(off64_t offset) {
|
|
return static_cast<size_t>(offset & (PAGE_SIZE-1));
|
|
}
|
|
|