Boost Jam code cleanup - updated path_tmpdir() to return a string object instead of a raw C char pointer.

[SVN r79068]

src/engine/execnt.c

@@ -1182,11 +1182,11 @@ static FILE * open_command_file( int const slot )
     if ( !command_file->value )
     {
         DWORD const procID = GetCurrentProcessId();
-        char const * const tmpdir = path_tmpdir();
+        string const * const tmpdir = path_tmpdir();
         string_new( command_file );
-        string_reserve( command_file, strlen( tmpdir ) + 64 );
+        string_reserve( command_file, tmpdir->size + 64 );
         command_file->size = sprintf( command_file->value, "%s\\jam%d-%02d.bat",
-            tmpdir, procID, slot );
+            tmpdir->value, procID, slot );
     }
 
     /* Write command to bat file. For some reason this open can fail

src/engine/pathsys.h

@@ -72,7 +72,7 @@ void path_add_key( OBJECT * path );
 /** Returns a static pointer to the system dependent path to the temporary
     directory. NOTE: *without* a trailing path separator.
 */
-char const * path_tmpdir( void );
+string const * path_tmpdir( void );
 
 /** Returns a new temporary name.
 */

src/engine/pathunix.c

@@ -522,7 +522,7 @@ void path_done( void )
 
 #endif
 
-char const * path_tmpdir()
+string const * path_tmpdir()
 {
     static string buffer[ 1 ];
     static int have_result;
@@ -546,7 +546,7 @@ char const * path_tmpdir()
         #endif
         have_result = 1;
     }
-    return buffer->value;
+    return buffer;
 }
 
 OBJECT * path_tmpnam( void )
@@ -571,7 +571,7 @@ OBJECT * path_tmpfile( void )
     OBJECT * tmpnam;
 
     string file_path[ 1 ];
-    string_copy( file_path, path_tmpdir() );
+    string_copy( file_path, path_tmpdir()->value );
     string_push_back( file_path, PATH_DELIM );
     tmpnam = path_tmpnam();
     string_append( file_path, object_str( tmpnam ) );

src/engine/variable.c

@@ -176,7 +176,7 @@ LIST * var_get( struct module_t * module, OBJECT * symbol )
     if ( object_equal( symbol, constant_TMPDIR ) )
     {
         list_free( saved_var );
-        result = saved_var = list_new( object_new( path_tmpdir() ) );
+        result = saved_var = list_new( object_new( path_tmpdir()->value ) );
     }
     else if ( object_equal( symbol, constant_TMPNAME ) )
     {