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Commit f7bb2d38 authored by Ross Kettleson's avatar Ross Kettleson Committed by Automerger Merge Worker
Browse files

Merge "Revert "Drop all path-related methods from android::String8"" into main am: acc7ff19 

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2745822



Change-Id: I78a8590c20b437779ed0231041addf5f46b11b9f
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents eb6aa6ae acc7ff19

libutils/String8.cpp

+136 −0
Original line number Diff line number Diff line
@@ -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;
@@ -442,4 +467,115 @@ 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.

 */

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);

    if (lastSlash == nullptr)

        lastSlash = str;

    else

        lastSlash++;



    // find the last dot

    lastDot = strrchr(lastSlash, '.');

    if (lastDot == nullptr)

        return nullptr;



    // looks good, ship it

    return const_cast<char*>(lastDot);

}



String8 String8::getPathExtension(void) const

{

    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

libutils/String8_fuzz.cpp

+24 −0
Original line number Diff line number Diff line
@@ -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) {

libutils/abi-dumps/arm64/source-based/libutils.so.lsdump

+104 −1
Original line number Diff line number Diff line
@@ -703,6 +703,9 @@ 
  {

   "name" : "_ZN7android7RefBaseD2Ev"

  },

  {

   "name" : "_ZN7android7String810appendPathEPKc"

  },

  {

   "name" : "_ZN7android7String810lockBufferEm"

  },
@@ -1141,12 +1144,27 @@ 
  {

   "name" : "_ZNK7android7String810getPathDirEv"

  },

  {

   "name" : "_ZNK7android7String811getBasePathEv"

  },

  {

   "name" : "_ZNK7android7String811getPathLeafEv"

  },

  {

   "name" : "_ZNK7android7String814find_extensionEv"

  },

  {

   "name" : "_ZNK7android7String816getPathExtensionEv"

  },

  {

   "name" : "_ZNK7android7String84findEPKcm"

  },

  {

   "name" : "_ZNK7android7String86lengthEv"

  },

  {

   "name" : "_ZNK7android7String88walkPathEPS0_"

  },

  {

   "name" : "_ZNK7android8String1610startsWithEPKDs"

  },
@@ -6790,6 +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",
@@ -9070,7 +9104,6 @@ 
   "source_file" : "system/core/libutils/include/utils/RefBase.h"

  },

  {

   "access" : "private",

   "function_name" : "android::String8::getPathDir",

   "linker_set_key" : "_ZNK7android7String810getPathDirEv",

   "parameters" :
@@ -9083,6 +9116,59 @@ 
   "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" :

   [

    {

     "is_this_ptr" : true,

     "referenced_type" : "_ZTIPKN7android7String8E"

    }

   ],

   "return_type" : "_ZTIN7android7String8E",

   "source_file" : "system/core/libutils/include/utils/String8.h"

  },

  {

   "function_name" : "android::String8::find",

   "linker_set_key" : "_ZNK7android7String84findEPKcm",
@@ -9116,6 +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",

libutils/abi-dumps/arm_arm64/source-based/libutils.so.lsdump

+104 −1
Original line number Diff line number Diff line
@@ -703,6 +703,9 @@ 
  {

   "name" : "_ZN7android7RefBaseD2Ev"

  },

  {

   "name" : "_ZN7android7String810appendPathEPKc"

  },

  {

   "name" : "_ZN7android7String810lockBufferEj"

  },
@@ -1141,12 +1144,27 @@ 
  {

   "name" : "_ZNK7android7String810getPathDirEv"

  },

  {

   "name" : "_ZNK7android7String811getBasePathEv"

  },

  {

   "name" : "_ZNK7android7String811getPathLeafEv"

  },

  {

   "name" : "_ZNK7android7String814find_extensionEv"

  },

  {

   "name" : "_ZNK7android7String816getPathExtensionEv"

  },

  {

   "name" : "_ZNK7android7String84findEPKcj"

  },

  {

   "name" : "_ZNK7android7String86lengthEv"

  },

  {

   "name" : "_ZNK7android7String88walkPathEPS0_"

  },

  {

   "name" : "_ZNK7android8String1610startsWithEPKDs"

  },
@@ -6786,6 +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",
@@ -9066,7 +9100,6 @@ 
   "source_file" : "system/core/libutils/include/utils/RefBase.h"

  },

  {

   "access" : "private",

   "function_name" : "android::String8::getPathDir",

   "linker_set_key" : "_ZNK7android7String810getPathDirEv",

   "parameters" :
@@ -9079,6 +9112,59 @@ 
   "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" :

   [

    {

     "is_this_ptr" : true,

     "referenced_type" : "_ZTIPKN7android7String8E"

    }

   ],

   "return_type" : "_ZTIN7android7String8E",

   "source_file" : "system/core/libutils/include/utils/String8.h"

  },

  {

   "function_name" : "android::String8::find",

   "linker_set_key" : "_ZNK7android7String84findEPKcj",
@@ -9112,6 +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",

libutils/include/utils/String8.h

+72 −2
Original line number Diff line number Diff line
@@ -130,10 +130,80 @@ public: 


            void                toLower();



private:



    /*

     * 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;

};