merge lldb-platform-work branch (and assorted fixes) into trunk

    Summary:
    This merge brings in the improved 'platform' command that knows how to
    interface with remote machines; that is, query OS/kernel information, push
    and pull files, run shell commands, etc... and implementation for the new
    communication packets that back that interface, at least on Darwin based
    operating systems via the POSIXPlatform class. Linux support is coming soon.

    Verified the test suite runs cleanly on Linux (x86_64), build OK on Mac OS
    X Mountain Lion.

    Additional improvements (not in the source SVN branch 'lldb-platform-work'):
    - cmake build scripts for lldb-platform
    - cleanup test suite
    - documentation stub for qPlatform_RunCommand
    - use log class instead of printf() directly
    - reverted work-in-progress-looking changes from test/types/TestAbstract.py that work towards running the test suite remotely.
    - add new logging category 'platform'

    Reviewers: Matt Kopec, Greg Clayton

    Review: http://llvm-reviews.chandlerc.com/D1493

llvm-svn: 189295

1 files changed, 135 insertions, 0 deletions

diff --git a/lldb/source/Host/common/FileSpec.cpp b/lldb/source/Host/common/FileSpec.cpp
index 0bf7681aa48..66818453bc0 100644
--- a/lldb/source/Host/common/FileSpec.cpp
+++ b/lldb/source/Host/common/FileSpec.cpp
@@ -29,6 +29,7 @@
 #include "llvm/Support/Path.h"
 #include "llvm/Support/Program.h"
 
+#include "lldb/Core/StreamString.h"
 #include "lldb/Host/File.h"
 #include "lldb/Host/FileSpec.h"
 #include "lldb/Core/DataBufferHeap.h"
@@ -1106,6 +1107,140 @@ FileSpec::EnumerateDirectory
     return eEnumerateDirectoryResultNext;    
 }
 
+FileSpec
+FileSpec::CopyByAppendingPathComponent (const char *new_path)  const
+{
+    const bool resolve = false;
+    if (m_filename.IsEmpty() && m_directory.IsEmpty())
+        return FileSpec(new_path,resolve);
+    StreamString stream;
+    if (m_filename.IsEmpty())
+        stream.Printf("%s/%s",m_directory.GetCString(),new_path);
+    else if (m_directory.IsEmpty())
+        stream.Printf("%s/%s",m_filename.GetCString(),new_path);
+    else
+        stream.Printf("%s/%s/%s",m_directory.GetCString(), m_filename.GetCString(),new_path);
+    return FileSpec(stream.GetData(),resolve);
+}
+
+FileSpec
+FileSpec::CopyByRemovingLastPathComponent ()  const
+{
+    const bool resolve = false;
+    if (m_filename.IsEmpty() && m_directory.IsEmpty())
+        return FileSpec("",resolve);
+    if (m_directory.IsEmpty())
+        return FileSpec("",resolve);
+    if (m_filename.IsEmpty())
+    {
+        const char* dir_cstr = m_directory.GetCString();
+        const char* last_slash_ptr = ::strrchr(dir_cstr, '/');
+        
+        // check for obvious cases before doing the full thing
+        if (!last_slash_ptr)
+            return FileSpec("",resolve);
+        if (last_slash_ptr == dir_cstr)
+            return FileSpec("/",resolve);
+        
+        size_t last_slash_pos = last_slash_ptr - dir_cstr+1;
+        ConstString new_path(dir_cstr,last_slash_pos);
+        return FileSpec(new_path.GetCString(),resolve);
+    }
+    else
+        return FileSpec(m_directory.GetCString(),resolve);
+}
+
+const char*
+FileSpec::GetLastPathComponent () const
+{
+    if (m_filename.IsEmpty() && m_directory.IsEmpty())
+        return NULL;
+    if (m_filename.IsEmpty())
+    {
+        const char* dir_cstr = m_directory.GetCString();
+        const char* last_slash_ptr = ::strrchr(dir_cstr, '/');
+        if (last_slash_ptr == NULL)
+            return m_directory.GetCString();
+        if (last_slash_ptr == dir_cstr)
+        {
+            if (last_slash_ptr[1] == 0)
+                return last_slash_ptr;
+            else
+                return last_slash_ptr+1;
+        }
+        if (last_slash_ptr[1] != 0)
+            return last_slash_ptr+1;
+        const char* penultimate_slash_ptr = last_slash_ptr;
+        while (*penultimate_slash_ptr)
+        {
+            --penultimate_slash_ptr;
+            if (penultimate_slash_ptr == dir_cstr)
+                break;
+            if (*penultimate_slash_ptr == '/')
+                break;
+        }
+        ConstString new_path(penultimate_slash_ptr+1,last_slash_ptr-penultimate_slash_ptr);
+        return new_path.AsCString();
+    }
+    return m_filename.GetCString();
+}
+
+void
+FileSpec::AppendPathComponent (const char *new_path)
+{
+    const bool resolve = false;
+    if (m_filename.IsEmpty() && m_directory.IsEmpty())
+    {
+        SetFile(new_path,resolve);
+        return;
+    }
+    StreamString stream;
+    if (m_filename.IsEmpty())
+        stream.Printf("%s/%s",m_directory.GetCString(),new_path);
+    else if (m_directory.IsEmpty())
+        stream.Printf("%s/%s",m_filename.GetCString(),new_path);
+    else
+        stream.Printf("%s/%s/%s",m_directory.GetCString(), m_filename.GetCString(),new_path);
+    SetFile(stream.GetData(), resolve);
+}
+
+void
+FileSpec::RemoveLastPathComponent ()
+{
+    const bool resolve = false;
+    if (m_filename.IsEmpty() && m_directory.IsEmpty())
+    {
+        SetFile("",resolve);
+        return;
+    }
+    if (m_directory.IsEmpty())
+    {
+        SetFile("",resolve);
+        return;
+    }
+    if (m_filename.IsEmpty())
+    {
+        const char* dir_cstr = m_directory.GetCString();
+        const char* last_slash_ptr = ::strrchr(dir_cstr, '/');
+        
+        // check for obvious cases before doing the full thing
+        if (!last_slash_ptr)
+        {
+            SetFile("",resolve);
+            return;
+        }
+        if (last_slash_ptr == dir_cstr)
+        {
+            SetFile("/",resolve);
+            return;
+        }        
+        size_t last_slash_pos = last_slash_ptr - dir_cstr+1;
+        ConstString new_path(dir_cstr,last_slash_pos);
+        SetFile(new_path.GetCString(),resolve);
+    }
+    else
+        SetFile(m_directory.GetCString(),resolve);
+}
 //------------------------------------------------------------------
 /// Returns true if the filespec represents an implementation source
 /// file (files with a ".c", ".cpp", ".m", ".mm" (many more)