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Revert "Revert "Revert "Drop all path-related methods from android::String8"""

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This reverts commit 4b6a7c3940.

Reason for revert: b/299695302, b/299694769

Change-Id: I89c6719d23446f2f9ce24e5b75d321538b580431
This commit is contained in:
Rhed Jao 2023-09-11 02:05:58 +00:00 committed by Gerrit Code Review
parent 4b6a7c3940
commit 141255f30c
5 changed files with 375 additions and 8 deletions
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108
libutils/String8.cpp
View file

@ -430,6 +430,31 @@ void String8::toLower()
// ---------------------------------------------------------------------------
// Path functions
static void setPathName(String8& s, const char* name) {
size_t len = strlen(name);
char* buf = s.lockBuffer(len);
memcpy(buf, name, len);
// remove trailing path separator, if present
if (len > 0 && buf[len - 1] == OS_PATH_SEPARATOR) len--;
buf[len] = '\0';
s.unlockBuffer(len);
}
String8 String8::getPathLeaf(void) const
{
const char* cp;
const char*const buf = mString;
cp = strrchr(buf, OS_PATH_SEPARATOR);
if (cp == nullptr)
return String8(*this);
else
return String8(cp+1);
}
String8 String8::getPathDir(void) const
{
const char* cp;
@ -442,14 +467,40 @@ String8 String8::getPathDir(void) const
return String8(str, cp - str);
}
String8 String8::walkPath(String8* outRemains) const
{
const char* cp;
const char*const str = mString;
const char* buf = str;
cp = strchr(buf, OS_PATH_SEPARATOR);
if (cp == buf) {
// don't include a leading '/'.
buf = buf+1;
cp = strchr(buf, OS_PATH_SEPARATOR);
}
if (cp == nullptr) {
String8 res = buf != str ? String8(buf) : *this;
if (outRemains) *outRemains = String8("");
return res;
}
String8 res(buf, cp-buf);
if (outRemains) *outRemains = String8(cp+1);
return res;
}
/*
* Helper function for finding the start of an extension in a pathname.
*
* Returns a pointer inside mString, or NULL if no extension was found.
*/
static const char* find_extension(const char* str) {
char* String8::find_extension(void) const
{
const char* lastSlash;
const char* lastDot;
const char* const str = mString;
// only look at the filename
lastSlash = strrchr(str, OS_PATH_SEPARATOR);
@ -464,16 +515,67 @@ static const char* find_extension(const char* str) {
return nullptr;
// looks good, ship it
return lastDot;
return const_cast<char*>(lastDot);
}
String8 String8::getPathExtension(void) const
{
auto ext = find_extension(mString);
char* ext;
ext = find_extension();
if (ext != nullptr)
return String8(ext);
else
return String8("");
}
String8 String8::getBasePath(void) const
{
char* ext;
const char* const str = mString;
ext = find_extension();
if (ext == nullptr)
return String8(*this);
else
return String8(str, ext - str);
}
String8& String8::appendPath(const char* name)
{
// TODO: The test below will fail for Win32 paths. Fix later or ignore.
if (name[0] != OS_PATH_SEPARATOR) {
if (*name == '\0') {
// nothing to do
return *this;
}
size_t len = length();
if (len == 0) {
// no existing filename, just use the new one
setPathName(*this, name);
return *this;
}
// make room for oldPath + '/' + newPath
int newlen = strlen(name);
char* buf = lockBuffer(len+1+newlen);
// insert a '/' if needed
if (buf[len-1] != OS_PATH_SEPARATOR)
buf[len++] = OS_PATH_SEPARATOR;
memcpy(buf+len, name, newlen+1);
len += newlen;
unlockBuffer(len);
return *this;
} else {
setPathName(*this, name);
return *this;
}
}
}; // namespace android

24
libutils/String8_fuzz.cpp
View file

@ -68,6 +68,30 @@ std::vector<std::function<void(FuzzedDataProvider*, android::String8*, android::
int start_index = dataProvider->ConsumeIntegralInRange<int>(0, str1->size());
str1->find(str2->c_str(), start_index);
},
// Path handling
[](FuzzedDataProvider*, android::String8* str1, android::String8*) -> void {
str1->getBasePath();
},
[](FuzzedDataProvider*, android::String8* str1, android::String8*) -> void {
str1->getPathExtension();
},
[](FuzzedDataProvider*, android::String8* str1, android::String8*) -> void {
str1->getPathLeaf();
},
[](FuzzedDataProvider*, android::String8* str1, android::String8*) -> void {
str1->getPathDir();
},
[](FuzzedDataProvider*, android::String8* str1, android::String8*) -> void {
std::shared_ptr<android::String8> path_out_str =
std::make_shared<android::String8>();
str1->walkPath(path_out_str.get());
path_out_str->clear();
},
[](FuzzedDataProvider* dataProvider, android::String8* str1,
android::String8*) -> void {
str1->appendPath(dataProvider->ConsumeBytesWithTerminator<char>(5).data());
},
};
void fuzzFormat(FuzzedDataProvider* dataProvider, android::String8* str1, bool shouldAppend) {

88
libutils/abi-dumps/arm64/source-based/libutils.so.lsdump
View file

@ -703,6 +703,9 @@
{
"name" : "_ZN7android7RefBaseD2Ev"
},
{
"name" : "_ZN7android7String810appendPathEPKc"
},
{
"name" : "_ZN7android7String810lockBufferEm"
},
@ -1141,6 +1144,15 @@
{
"name" : "_ZNK7android7String810getPathDirEv"
},
{
"name" : "_ZNK7android7String811getBasePathEv"
},
{
"name" : "_ZNK7android7String811getPathLeafEv"
},
{
"name" : "_ZNK7android7String814find_extensionEv"
},
{
"name" : "_ZNK7android7String816getPathExtensionEv"
},
@ -1150,6 +1162,9 @@
{
"name" : "_ZNK7android7String86lengthEv"
},
{
"name" : "_ZNK7android7String88walkPathEPS0_"
},
{
"name" : "_ZNK7android8String1610startsWithEPKDs"
},
@ -6793,6 +6808,22 @@
"return_type" : "_ZTIv",
"source_file" : "system/core/libutils/include/utils/RefBase.h"
},
{
"function_name" : "android::String8::appendPath",
"linker_set_key" : "_ZN7android7String810appendPathEPKc",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPN7android7String8E"
},
{
"referenced_type" : "_ZTIPKc"
}
],
"return_type" : "_ZTIRN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::lockBuffer",
"linker_set_key" : "_ZN7android7String810lockBufferEm",
@ -9073,7 +9104,6 @@
"source_file" : "system/core/libutils/include/utils/RefBase.h"
},
{
"access" : "private",
"function_name" : "android::String8::getPathDir",
"linker_set_key" : "_ZNK7android7String810getPathDirEv",
"parameters" :
@ -9086,8 +9116,47 @@
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::getBasePath",
"linker_set_key" : "_ZNK7android7String811getBasePathEv",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
}
],
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::getPathLeaf",
"linker_set_key" : "_ZNK7android7String811getPathLeafEv",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
}
],
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"access" : "private",
"function_name" : "android::String8::find_extension",
"linker_set_key" : "_ZNK7android7String814find_extensionEv",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
}
],
"return_type" : "_ZTIPc",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::getPathExtension",
"linker_set_key" : "_ZNK7android7String816getPathExtensionEv",
"parameters" :
@ -9133,6 +9202,23 @@
"return_type" : "_ZTIm",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::walkPath",
"linker_set_key" : "_ZNK7android7String88walkPathEPS0_",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
},
{
"default_arg" : true,
"referenced_type" : "_ZTIPN7android7String8E"
}
],
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String16::startsWith",
"linker_set_key" : "_ZNK7android8String1610startsWithEPKDs",

88
libutils/abi-dumps/arm_arm64/source-based/libutils.so.lsdump
View file

@ -703,6 +703,9 @@
{
"name" : "_ZN7android7RefBaseD2Ev"
},
{
"name" : "_ZN7android7String810appendPathEPKc"
},
{
"name" : "_ZN7android7String810lockBufferEj"
},
@ -1141,6 +1144,15 @@
{
"name" : "_ZNK7android7String810getPathDirEv"
},
{
"name" : "_ZNK7android7String811getBasePathEv"
},
{
"name" : "_ZNK7android7String811getPathLeafEv"
},
{
"name" : "_ZNK7android7String814find_extensionEv"
},
{
"name" : "_ZNK7android7String816getPathExtensionEv"
},
@ -1150,6 +1162,9 @@
{
"name" : "_ZNK7android7String86lengthEv"
},
{
"name" : "_ZNK7android7String88walkPathEPS0_"
},
{
"name" : "_ZNK7android8String1610startsWithEPKDs"
},
@ -6789,6 +6804,22 @@
"return_type" : "_ZTIv",
"source_file" : "system/core/libutils/include/utils/RefBase.h"
},
{
"function_name" : "android::String8::appendPath",
"linker_set_key" : "_ZN7android7String810appendPathEPKc",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPN7android7String8E"
},
{
"referenced_type" : "_ZTIPKc"
}
],
"return_type" : "_ZTIRN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::lockBuffer",
"linker_set_key" : "_ZN7android7String810lockBufferEj",
@ -9069,7 +9100,6 @@
"source_file" : "system/core/libutils/include/utils/RefBase.h"
},
{
"access" : "private",
"function_name" : "android::String8::getPathDir",
"linker_set_key" : "_ZNK7android7String810getPathDirEv",
"parameters" :
@ -9082,8 +9112,47 @@
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::getBasePath",
"linker_set_key" : "_ZNK7android7String811getBasePathEv",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
}
],
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::getPathLeaf",
"linker_set_key" : "_ZNK7android7String811getPathLeafEv",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
}
],
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"access" : "private",
"function_name" : "android::String8::find_extension",
"linker_set_key" : "_ZNK7android7String814find_extensionEv",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
}
],
"return_type" : "_ZTIPc",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::getPathExtension",
"linker_set_key" : "_ZNK7android7String816getPathExtensionEv",
"parameters" :
@ -9129,6 +9198,23 @@
"return_type" : "_ZTIj",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String8::walkPath",
"linker_set_key" : "_ZNK7android7String88walkPathEPS0_",
"parameters" :
[
{
"is_this_ptr" : true,
"referenced_type" : "_ZTIPKN7android7String8E"
},
{
"default_arg" : true,
"referenced_type" : "_ZTIPN7android7String8E"
}
],
"return_type" : "_ZTIN7android7String8E",
"source_file" : "system/core/libutils/include/utils/String8.h"
},
{
"function_name" : "android::String16::startsWith",
"linker_set_key" : "_ZNK7android8String1610startsWithEPKDs",

75
libutils/include/utils/String8.h
View file

@ -130,11 +130,80 @@ public:
void toLower();
private:
String8 getPathDir(void) const;
String8 getPathExtension(void) const;
/*
* These methods operate on the string as if it were a path name.
*/
/*
* Get just the filename component.
*
* "/tmp/foo/bar.c" --> "bar.c"
*/
String8 getPathLeaf(void) const;
/*
* Remove the last (file name) component, leaving just the directory
* name.
*
* "/tmp/foo/bar.c" --> "/tmp/foo"
* "/tmp" --> "" // ????? shouldn't this be "/" ???? XXX
* "bar.c" --> ""
*/
String8 getPathDir(void) const;
/*
* Retrieve the front (root dir) component. Optionally also return the
* remaining components.
*
* "/tmp/foo/bar.c" --> "tmp" (remain = "foo/bar.c")
* "/tmp" --> "tmp" (remain = "")
* "bar.c" --> "bar.c" (remain = "")
*/
String8 walkPath(String8* outRemains = nullptr) const;
/*
* Return the filename extension. This is the last '.' and any number
* of characters that follow it. The '.' is included in case we
* decide to expand our definition of what constitutes an extension.
*
* "/tmp/foo/bar.c" --> ".c"
* "/tmp" --> ""
* "/tmp/foo.bar/baz" --> ""
* "foo.jpeg" --> ".jpeg"
* "foo." --> ""
*/
String8 getPathExtension(void) const;
/*
* Return the path without the extension. Rules for what constitutes
* an extension are described in the comment for getPathExtension().
*
* "/tmp/foo/bar.c" --> "/tmp/foo/bar"
*/
String8 getBasePath(void) const;
/*
* Add a component to the pathname. We guarantee that there is
* exactly one path separator between the old path and the new.
* If there is no existing name, we just copy the new name in.
*
* If leaf is a fully qualified path (i.e. starts with '/', it
* replaces whatever was there before.
*/
String8& appendPath(const char* leaf);
String8& appendPath(const String8& leaf) { return appendPath(leaf.c_str()); }
/*
* Like appendPath(), but does not affect this string. Returns a new one instead.
*/
String8 appendPathCopy(const char* leaf) const
{ String8 p(*this); p.appendPath(leaf); return p; }
String8 appendPathCopy(const String8& leaf) const { return appendPathCopy(leaf.c_str()); }
private:
status_t real_append(const char* other, size_t numChars);
char* find_extension(void) const;
const char* mString;
};