1//===- llvm/ADT/SmallVector.cpp - 'Normally small' vectors ----------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the SmallVector class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/ADT/SmallVector.h"
15using namespace llvm;
16
17/// grow_pod - This is an implementation of the grow() method which only works
18/// on POD-like datatypes and is out of line to reduce code duplication.
19void SmallVectorBase::grow_pod(void *FirstEl, size_t MinSizeInBytes,
20                               size_t TSize) {
21  size_t CurSizeBytes = size_in_bytes();
22  size_t NewCapacityInBytes = 2 * capacity_in_bytes() + TSize; // Always grow.
23  if (NewCapacityInBytes < MinSizeInBytes)
24    NewCapacityInBytes = MinSizeInBytes;
25
26  void *NewElts;
27  if (BeginX == FirstEl) {
28    NewElts = malloc(NewCapacityInBytes);
29
30    // Copy the elements over.  No need to run dtors on PODs.
31    memcpy(NewElts, this->BeginX, CurSizeBytes);
32  } else {
33    // If this wasn't grown from the inline copy, grow the allocated space.
34    NewElts = realloc(this->BeginX, NewCapacityInBytes);
35  }
36
37  this->EndX = (char*)NewElts+CurSizeBytes;
38  this->BeginX = NewElts;
39  this->CapacityX = (char*)this->BeginX + NewCapacityInBytes;
40}
41