java.lang.Object
- org.lwjgl.system.Checks

```
public final class Checks
extends java.lang.Object
```
A class to check buffer boundaries in general. If there is insufficient space in the buffer when the call is made then a buffer overflow would otherwise occur and cause unexpected behaviour, a crash, or worse, a security risk.
Internal class, don't use.

See Also:

Configuration.DISABLE_CHECKS, Configuration.DEBUG, Configuration.DEBUG_FUNCTIONS

Field Summary

Fields
Modifier and Type Field and Description

static boolean CHECKS
Runtime checks flag.

static boolean DEBUG
Debug mode flag.

static boolean DEBUG_FUNCTIONS
Debug functions flag.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`checkArray(java.lang.Object[] array, int size)`
`static void`	`checkBuffer(java.nio.Buffer buf, int size)` Helper method to ensure a buffer has enough capacity.
`static void`	`checkBuffer(java.nio.Buffer buf, long size)`
`static void`	`checkBuffer(java.lang.CharSequence text, int size)` Helper method to ensure a CharSequence has enough characters.
`static void`	`checkBuffer(double[] buf, int size)` Helper method to ensure a array has enough capacity.
`static void`	`checkBuffer(float[] buf, int size)` Helper method to ensure a array has enough capacity.
`static void`	`checkBuffer(int[] buf, int size)` Helper method to ensure a array has enough capacity.
`static void`	`checkBuffer(long[] buf, int size)` Helper method to ensure a array has enough capacity.
`static void`	`checkBuffer(PointerBuffer buf, int size)` Helper method to ensure a `PointerBuffer` has enough capacity.
`static void`	`checkBuffer(PointerBuffer buf, long size)`
`static void`	`checkBuffer(short[] buf, int size)` Helper method to ensure a array has enough capacity.
`static void`	`checkBuffer(StructBuffer<?,?> buf, int size)` Helper method to ensure a `StructBuffer` has enough capacity.
`static void`	`checkBuffer(StructBuffer<?,?> buf, long size)`
`static void`	`checkBufferGT(java.nio.Buffer buf, int size)`
`static void`	`checkBufferGT(PointerBuffer buf, int size)`
`static void`	`checkBufferGT(StructBuffer<?,?> buf, int size)`
`static long`	`checkFunctionAddress(long pointer)` Ensures that the specified function pointer is not-null (0L).
`static boolean`	`checkFunctions(long... functions)` Checks if any of the specified functions pointers is `NULL`.
`static float[]`	`checkNT(float[] buf)` Ensures that the specified array is null-terminated.
`static java.nio.FloatBuffer`	`checkNT(java.nio.FloatBuffer buf)` Ensures that the specified FloatBuffer is null-terminated.
`static int[]`	`checkNT(int[] buf)` Ensures that the specified array is null-terminated.
`static int[]`	`checkNT(int[] buf, int terminator)` Ensures that the specified array is terminated with the specified terminator.
`static java.nio.IntBuffer`	`checkNT(java.nio.IntBuffer buf)` Ensures that the specified IntBuffer is null-terminated.
`static java.nio.IntBuffer`	`checkNT(java.nio.IntBuffer buf, int terminator)` Ensures that the specified IntBuffer is terminated with the specified terminator.
`static long[]`	`checkNT(long[] buf)` Ensures that the specified array is null-terminated.
`static java.nio.LongBuffer`	`checkNT(java.nio.LongBuffer buf)` Ensures that the specified LongBuffer is null-terminated.
`static PointerBuffer`	`checkNT(PointerBuffer buf)` Ensures that the specified PointerBuffer is null-terminated.
`static PointerBuffer`	`checkNT(PointerBuffer buf, long terminator)` Ensures that the specified PointerBuffer is terminated with the specified terminator.
`static java.nio.ByteBuffer`	`checkNT1(java.nio.ByteBuffer buf)` Ensures that the specified ByteBuffer is null-terminated (last byte equal to 0).
`static java.nio.ByteBuffer`	`checkNT2(java.nio.ByteBuffer buf)` Ensures that the specified ByteBuffer is null-terminated (last 2 bytes equal to 0).
`static java.nio.ByteBuffer`	`checkNT4(java.nio.ByteBuffer buf)` Ensures that the specified ByteBuffer is null-terminated (last 4 bytes equal to 0).
`static java.nio.ByteBuffer`	`checkNT4(java.nio.ByteBuffer buf, int terminator)` Ensures that the specified ByteBuffer is terminated with the specified terminator (last 4 bytes equal to `terminator`).
`static java.nio.ByteBuffer`	`checkNT8(java.nio.ByteBuffer buf)` Ensures that the specified ByteBuffer is null-terminated (last 8 bytes equal to 0).
`static java.nio.ByteBuffer`	`checkNTP(java.nio.ByteBuffer buf)` Ensures that the specified ByteBuffer is null-terminated (last 4 or 8 bytes equal to 0).
`static java.nio.ByteBuffer`	`checkNTP(java.nio.ByteBuffer buf, long terminator)` Ensures that the specified ByteBuffer is terminated with the specified terminator (last 4 or 8 bytes equal to `terminator`).
`static long`	`checkPointer(long pointer)` Ensures that the specified pointer is not-null (0L).

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - CHECKS
```
public static final boolean CHECKS
```
    Runtime checks flag.
    When enabled, LWJGL will perform basic checks during its operation, mainly to avoid crashes in native code. Examples of such checks are: context-specific function address validation, buffer capacity checks, null-termination checks, etc. These checks are generally low-overhead and should not have a measurable effect on performance, so its recommended to have them enabled both during development and in production releases.
    
    If maximum performance is required, they can be disabled by setting Configuration.DISABLE_CHECKS to true.
  - DEBUG
```
public static final boolean DEBUG
```
    Debug mode flag.
    When enabled, LWJGL will perform additional checks during its operation. These checks are more expensive than the ones enabled with Checks.CHECKS and will have a noticeable effect on performance, so they are disabled by default. Examples of such checks are: buffer object binding state check (GL), buffer capacity checks for texture images (GL & CL), etc. LWJGL will also print additional information, mainly during start-up.
    
    Can be enabled by setting Configuration.DEBUG to true.
  - DEBUG_FUNCTIONS
```
public static final boolean DEBUG_FUNCTIONS
```
    Debug functions flag.
    When enabled, capabilities classes will print an error message when they fail to retrieve a function pointer.
    
    Can be enabled by setting Configuration.DEBUG_FUNCTIONS to true.
- Method Detail
  - checkFunctions
```
public static boolean checkFunctions(long... functions)
```
    Checks if any of the specified functions pointers is NULL.
    
    Parameters:
    
    functions - the function pointers to check
    
    Returns:
    
    true if all function pointers are valid, false otherwise.
  - checkFunctionAddress
```
public static long checkFunctionAddress(long pointer)
```
    Ensures that the specified function pointer is not-null (0L).
    
    Parameters:
    
    pointer - the pointer to check
    
    Throws:
    
    java.lang.IllegalStateException
  - checkPointer
```
public static long checkPointer(long pointer)
```
    Ensures that the specified pointer is not-null (0L).
    
    Parameters:
    
    pointer - the pointer to check
    
    Throws:
    
    java.lang.NullPointerException
  - checkNT1
```
public static java.nio.ByteBuffer checkNT1(java.nio.ByteBuffer buf)
```
    Ensures that the specified ByteBuffer is null-terminated (last byte equal to 0).
  - checkNT2
```
public static java.nio.ByteBuffer checkNT2(java.nio.ByteBuffer buf)
```
    Ensures that the specified ByteBuffer is null-terminated (last 2 bytes equal to 0).
  - checkNT4
```
public static java.nio.ByteBuffer checkNT4(java.nio.ByteBuffer buf)
```
    Ensures that the specified ByteBuffer is null-terminated (last 4 bytes equal to 0).
  - checkNT4
```
public static java.nio.ByteBuffer checkNT4(java.nio.ByteBuffer buf,
                                           int terminator)
```
    Ensures that the specified ByteBuffer is terminated with the specified terminator (last 4 bytes equal to terminator).
  - checkNT8
```
public static java.nio.ByteBuffer checkNT8(java.nio.ByteBuffer buf)
```
    Ensures that the specified ByteBuffer is null-terminated (last 8 bytes equal to 0).
  - checkNTP
```
public static java.nio.ByteBuffer checkNTP(java.nio.ByteBuffer buf)
```
    Ensures that the specified ByteBuffer is null-terminated (last 4 or 8 bytes equal to 0).
  - checkNTP
```
public static java.nio.ByteBuffer checkNTP(java.nio.ByteBuffer buf,
                                           long terminator)
```
    Ensures that the specified ByteBuffer is terminated with the specified terminator (last 4 or 8 bytes equal to terminator).
  - checkNT
```
public static java.nio.IntBuffer checkNT(java.nio.IntBuffer buf)
```
    Ensures that the specified IntBuffer is null-terminated.
  - checkNT
```
public static int[] checkNT(int[] buf)
```
    Ensures that the specified array is null-terminated.
  - checkNT
```
public static java.nio.IntBuffer checkNT(java.nio.IntBuffer buf,
                                         int terminator)
```
    Ensures that the specified IntBuffer is terminated with the specified terminator.
  - checkNT
```
public static int[] checkNT(int[] buf,
                            int terminator)
```
    Ensures that the specified array is terminated with the specified terminator.
  - checkNT
```
public static java.nio.LongBuffer checkNT(java.nio.LongBuffer buf)
```
    Ensures that the specified LongBuffer is null-terminated.
  - checkNT
```
public static long[] checkNT(long[] buf)
```
    Ensures that the specified array is null-terminated.
  - checkNT
```
public static java.nio.FloatBuffer checkNT(java.nio.FloatBuffer buf)
```
    Ensures that the specified FloatBuffer is null-terminated.
  - checkNT
```
public static float[] checkNT(float[] buf)
```
    Ensures that the specified array is null-terminated.
  - checkNT
```
public static PointerBuffer checkNT(PointerBuffer buf)
```
    Ensures that the specified PointerBuffer is null-terminated.
  - checkNT
```
public static PointerBuffer checkNT(PointerBuffer buf,
                                    long terminator)
```
    Ensures that the specified PointerBuffer is terminated with the specified terminator.
  - checkBuffer
```
public static void checkBuffer(short[] buf,
                               int size)
```
    Helper method to ensure a array has enough capacity.
    
    Parameters:
    
    buf - the array to check
    
    size - the minimum array capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(int[] buf,
                               int size)
```
    Helper method to ensure a array has enough capacity.
    
    Parameters:
    
    buf - the array to check
    
    size - the minimum array capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(long[] buf,
                               int size)
```
    Helper method to ensure a array has enough capacity.
    
    Parameters:
    
    buf - the array to check
    
    size - the minimum array capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(float[] buf,
                               int size)
```
    Helper method to ensure a array has enough capacity.
    
    Parameters:
    
    buf - the array to check
    
    size - the minimum array capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(double[] buf,
                               int size)
```
    Helper method to ensure a array has enough capacity.
    
    Parameters:
    
    buf - the array to check
    
    size - the minimum array capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(java.lang.CharSequence text,
                               int size)
```
    Helper method to ensure a CharSequence has enough characters.
    
    Parameters:
    
    text - the text to check
    
    size - the minimum number of characters
  - checkBuffer
```
public static void checkBuffer(java.nio.Buffer buf,
                               int size)
```
    Helper method to ensure a buffer has enough capacity.
    
    Parameters:
    
    buf - the buffer to check
    
    size - the minimum buffer capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(java.nio.Buffer buf,
                               long size)
```
    See Also:
    
    Checks.checkBuffer(Buffer, int)
  - checkBuffer
```
public static void checkBuffer(PointerBuffer buf,
                               int size)
```
    Helper method to ensure a PointerBuffer has enough capacity.
    
    Parameters:
    
    buf - the buffer to check
    
    size - the minimum buffer capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(PointerBuffer buf,
                               long size)
```
    See Also:
    
    Checks.checkBuffer(PointerBuffer, int)
  - checkBuffer
```
public static void checkBuffer(StructBuffer<?,?> buf,
                               int size)
```
    Helper method to ensure a StructBuffer has enough capacity.
    
    Parameters:
    
    buf - the buffer to check
    
    size - the minimum buffer capacity
    
    Throws:
    
    java.lang.IllegalArgumentException
  - checkBuffer
```
public static void checkBuffer(StructBuffer<?,?> buf,
                               long size)
```
    See Also:
    
    Checks.checkBuffer(StructBuffer, int)
  - checkArray
```
public static void checkArray(java.lang.Object[] array,
                              int size)
```
  - checkBufferGT
```
public static void checkBufferGT(java.nio.Buffer buf,
                                 int size)
```
  - checkBufferGT
```
public static void checkBufferGT(PointerBuffer buf,
                                 int size)
```
  - checkBufferGT
```
public static void checkBufferGT(StructBuffer<?,?> buf,
                                 int size)
```

Modifier and Type	Field and Description
`static boolean`	`CHECKS` Runtime checks flag.
`static boolean`	`DEBUG` Debug mode flag.
`static boolean`	`DEBUG_FUNCTIONS` Debug functions flag.

Class Checks

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

CHECKS

DEBUG

DEBUG_FUNCTIONS

Method Detail

checkFunctions

checkFunctionAddress

checkPointer

checkNT1

checkNT2

checkNT4

checkNT4

checkNT8

checkNTP

checkNTP

checkNT

checkNT

checkNT

checkNT

checkNT

checkNT

checkNT

checkNT

checkNT

checkNT

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkBuffer

checkArray

checkBufferGT

checkBufferGT

checkBufferGT