src/test/SDL_test_fuzzer.c - third_party/sdl - Git at Google

 /*
   Simple DirectMedia Layer
   Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>

   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
   arising from the use of this software.

   Permission is granted to anyone to use this software for any purpose,
   including commercial applications, and to alter it and redistribute it
   freely, subject to the following restrictions:

   1. The origin of this software must not be misrepresented; you must not
      claim that you wrote the original software. If you use this software
      in a product, an acknowledgment in the product documentation would be
      appreciated but is not required.
   2. Altered source versions must be plainly marked as such, and must not be
      misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
 */

 /*

   Data generators for fuzzing test data in a reproducible way.

 */

 #include "SDL_config.h"

 /* Visual Studio 2008 doesn't have stdint.h */
 #if defined(_MSC_VER) && _MSC_VER <= 1500
 #define UINT8_MAX   ~(Uint8)0
 #define UINT16_MAX  ~(Uint16)0
 #define UINT32_MAX  ~(Uint32)0
 #define UINT64_MAX  ~(Uint64)0
 #else
 #define _GNU_SOURCE
 #include <stdint.h>
 #endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <limits.h>
 #include <float.h>

 #include "SDL_test.h"

 /**
  * Counter for fuzzer invocations
  */
 static int fuzzerInvocationCounter = 0;

 /**
  * Context for shared random number generator
  */
 static SDLTest_RandomContext rndContext;

 /*
  * Note: doxygen documentation markup for functions is in the header file.
  */

 void
 SDLTest_FuzzerInit(Uint64 execKey)
 {
     Uint32 a = (execKey >> 32) & 0x00000000FFFFFFFF;
     Uint32 b = execKey & 0x00000000FFFFFFFF;
     SDL_memset((void *)&rndContext, 0, sizeof(SDLTest_RandomContext));
     SDLTest_RandomInit(&rndContext, a, b);
     fuzzerInvocationCounter = 0;
 }

 int
 SDLTest_GetFuzzerInvocationCount()
 {
     return fuzzerInvocationCounter;
 }

 Uint8
 SDLTest_RandomUint8()
 {
     fuzzerInvocationCounter++;

     return (Uint8) SDLTest_RandomInt(&rndContext) & 0x000000FF;
 }

 Sint8
 SDLTest_RandomSint8()
 {
     fuzzerInvocationCounter++;

     return (Sint8) SDLTest_RandomInt(&rndContext) & 0x000000FF;
 }

 Uint16
 SDLTest_RandomUint16()
 {
     fuzzerInvocationCounter++;

     return (Uint16) SDLTest_RandomInt(&rndContext) & 0x0000FFFF;
 }

 Sint16
 SDLTest_RandomSint16()
 {
     fuzzerInvocationCounter++;

     return (Sint16) SDLTest_RandomInt(&rndContext) & 0x0000FFFF;
 }

 Sint32
 SDLTest_RandomSint32()
 {
     fuzzerInvocationCounter++;

     return (Sint32) SDLTest_RandomInt(&rndContext);
 }

 Uint32
 SDLTest_RandomUint32()
 {
     fuzzerInvocationCounter++;

     return (Uint32) SDLTest_RandomInt(&rndContext);
 }

 Uint64
 SDLTest_RandomUint64()
 {
     Uint64 value = 0;
     Uint32 *vp = (void *)&value;

     fuzzerInvocationCounter++;

     vp[0] = SDLTest_RandomSint32();
     vp[1] = SDLTest_RandomSint32();

     return value;
 }

 Sint64
 SDLTest_RandomSint64()
 {
     Uint64 value = 0;
     Uint32 *vp = (void *)&value;

     fuzzerInvocationCounter++;

     vp[0] = SDLTest_RandomSint32();
     vp[1] = SDLTest_RandomSint32();

     return value;
 }


 Sint32
 SDLTest_RandomIntegerInRange(Sint32 pMin, Sint32 pMax)
 {
     Sint64 min = pMin;
     Sint64 max = pMax;
     Sint64 temp;
     Sint64 number;

     if(pMin > pMax) {
         temp = min;
         min = max;
         max = temp;
     } else if(pMin == pMax) {
         return (Sint32)min;
     }

     number = SDLTest_RandomUint32();
     /* invocation count increment in preceeding call */

     return (Sint32)((number % ((max + 1) - min)) + min);
 }

 /* !
  * Generates a unsigned boundary value between the given boundaries.
  * Boundary values are inclusive. See the examples below.
  * If boundary2 < boundary1, the values are swapped.
  * If boundary1 == boundary2, value of boundary1 will be returned
  *
  * Generating boundary values for Uint8:
  * BoundaryValues(UINT8_MAX, 10, 20, True) -> [10,11,19,20]
  * BoundaryValues(UINT8_MAX, 10, 20, False) -> [9,21]
  * BoundaryValues(UINT8_MAX, 0, 15, True) -> [0, 1, 14, 15]
  * BoundaryValues(UINT8_MAX, 0, 15, False) -> [16]
  * BoundaryValues(UINT8_MAX, 0, 0xFF, False) -> [0], error set
  *
  * Generator works the same for other types of unsigned integers.
  *
  * \param maxValue The biggest value that is acceptable for this data type.
  *                  For instance, for Uint8 -> 255, Uint16 -> 65536 etc.
  * \param boundary1 defines lower boundary
  * \param boundary2 defines upper boundary
  * \param validDomain Generate only for valid domain (for the data type)
  *
  * \returns Returns a random boundary value for the domain or 0 in case of error
  */
 Uint64
 SDLTest_GenerateUnsignedBoundaryValues(const Uint64 maxValue, Uint64 boundary1, Uint64 boundary2, SDL_bool validDomain)
 {
         Uint64 b1, b2;
     Uint64 delta;
     Uint64 tempBuf[4];
     Uint8 index;

         /* Maybe swap */
     if (boundary1 > boundary2) {
         b1 = boundary2;
         b2 = boundary1;
     } else {
         b1 = boundary1;
         b2 = boundary2;
         }

     index = 0;
     if (validDomain == SDL_TRUE) {
             if (b1 == b2) {
                 return b1;
             }

             /* Generate up to 4 values within bounds */
             delta = b2 - b1;
             if (delta < 4) {
                 do {
                 tempBuf[index] = b1 + index;
                 index++;
                     } while (index < delta);
             } else {
           tempBuf[index] = b1;
           index++;
           tempBuf[index] = b1 + 1;
           index++;
           tempBuf[index] = b2 - 1;
           index++;
           tempBuf[index] = b2;
           index++;
             }
         } else {
             /* Generate up to 2 values outside of bounds */
         if (b1 > 0) {
             tempBuf[index] = b1 - 1;
             index++;
         }

         if (b2 < maxValue) {
             tempBuf[index] = b2 + 1;
             index++;
         }
     }

     if (index == 0) {
         /* There are no valid boundaries */
         SDL_Unsupported();
         return 0;
     }

     return tempBuf[SDLTest_RandomUint8() % index];
 }


 Uint8
 SDLTest_RandomUint8BoundaryValue(Uint8 boundary1, Uint8 boundary2, SDL_bool validDomain)
 {
     /* max value for Uint8 */
     const Uint64 maxValue = UCHAR_MAX;
     return (Uint8)SDLTest_GenerateUnsignedBoundaryValues(maxValue,
                 (Uint64) boundary1, (Uint64) boundary2,
                 validDomain);
 }

 Uint16
 SDLTest_RandomUint16BoundaryValue(Uint16 boundary1, Uint16 boundary2, SDL_bool validDomain)
 {
     /* max value for Uint16 */
     const Uint64 maxValue = USHRT_MAX;
     return (Uint16)SDLTest_GenerateUnsignedBoundaryValues(maxValue,
                 (Uint64) boundary1, (Uint64) boundary2,
                 validDomain);
 }

 Uint32
 SDLTest_RandomUint32BoundaryValue(Uint32 boundary1, Uint32 boundary2, SDL_bool validDomain)
 {
     /* max value for Uint32 */
     #if ((ULONG_MAX) == (UINT_MAX))
       const Uint64 maxValue = ULONG_MAX;
         #else
       const Uint64 maxValue = UINT_MAX;
         #endif
     return (Uint32)SDLTest_GenerateUnsignedBoundaryValues(maxValue,
                 (Uint64) boundary1, (Uint64) boundary2,
                 validDomain);
 }

 Uint64
 SDLTest_RandomUint64BoundaryValue(Uint64 boundary1, Uint64 boundary2, SDL_bool validDomain)
 {
     /* max value for Uint64 */
     const Uint64 maxValue = ULLONG_MAX;
     return SDLTest_GenerateUnsignedBoundaryValues(maxValue,
                 (Uint64) boundary1, (Uint64) boundary2,
                 validDomain);
 }

 /* !
  * Generates a signed boundary value between the given boundaries.
  * Boundary values are inclusive. See the examples below.
  * If boundary2 < boundary1, the values are swapped.
  * If boundary1 == boundary2, value of boundary1 will be returned
  *
  * Generating boundary values for Sint8:
  * SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -10, 20, True) -> [-10,-9,19,20]
  * SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -10, 20, False) -> [-11,21]
  * SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -30, -15, True) -> [-30, -29, -16, -15]
  * SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -127, 15, False) -> [16]
  * SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -127, 127, False) -> [0], error set
  *
  * Generator works the same for other types of signed integers.
  *
  * \param minValue The smallest value that is acceptable for this data type.
  *                  For instance, for Uint8 -> -127, etc.
  * \param maxValue The biggest value that is acceptable for this data type.
  *                  For instance, for Uint8 -> 127, etc.
  * \param boundary1 defines lower boundary
  * \param boundary2 defines upper boundary
  * \param validDomain Generate only for valid domain (for the data type)
  *
  * \returns Returns a random boundary value for the domain or 0 in case of error
  */
 Sint64
 SDLTest_GenerateSignedBoundaryValues(const Sint64 minValue, const Sint64 maxValue, Sint64 boundary1, Sint64 boundary2, SDL_bool validDomain)
 {
         Sint64 b1, b2;
     Sint64 delta;
     Sint64 tempBuf[4];
     Uint8 index;

         /* Maybe swap */
     if (boundary1 > boundary2) {
         b1 = boundary2;
         b2 = boundary1;
     } else {
         b1 = boundary1;
         b2 = boundary2;
         }

     index = 0;
     if (validDomain == SDL_TRUE) {
             if (b1 == b2) {
                 return b1;
             }

             /* Generate up to 4 values within bounds */
             delta = b2 - b1;
             if (delta < 4) {
                 do {
                 tempBuf[index] = b1 + index;
                 index++;
                     } while (index < delta);
             } else {
           tempBuf[index] = b1;
           index++;
           tempBuf[index] = b1 + 1;
           index++;
           tempBuf[index] = b2 - 1;
           index++;
           tempBuf[index] = b2;
           index++;
             }
         } else {
             /* Generate up to 2 values outside of bounds */
         if (b1 > minValue) {
             tempBuf[index] = b1 - 1;
             index++;
         }

         if (b2 < maxValue) {
             tempBuf[index] = b2 + 1;
             index++;
         }
     }

     if (index == 0) {
         /* There are no valid boundaries */
         SDL_Unsupported();
         return minValue;
     }

     return tempBuf[SDLTest_RandomUint8() % index];
 }


 Sint8
 SDLTest_RandomSint8BoundaryValue(Sint8 boundary1, Sint8 boundary2, SDL_bool validDomain)
 {
     /* min & max values for Sint8 */
     const Sint64 maxValue = SCHAR_MAX;
     const Sint64 minValue = SCHAR_MIN;
     return (Sint8)SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
                 (Sint64) boundary1, (Sint64) boundary2,
                 validDomain);
 }

 Sint16
 SDLTest_RandomSint16BoundaryValue(Sint16 boundary1, Sint16 boundary2, SDL_bool validDomain)
 {
     /* min & max values for Sint16 */
     const Sint64 maxValue = SHRT_MAX;
     const Sint64 minValue = SHRT_MIN;
     return (Sint16)SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
                 (Sint64) boundary1, (Sint64) boundary2,
                 validDomain);
 }

 Sint32
 SDLTest_RandomSint32BoundaryValue(Sint32 boundary1, Sint32 boundary2, SDL_bool validDomain)
 {
     /* min & max values for Sint32 */
     #if ((ULONG_MAX) == (UINT_MAX))
       const Sint64 maxValue = LONG_MAX;
       const Sint64 minValue = LONG_MIN;
         #else
       const Sint64 maxValue = INT_MAX;
       const Sint64 minValue = INT_MIN;
         #endif
     return (Sint32)SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
                 (Sint64) boundary1, (Sint64) boundary2,
                 validDomain);
 }

 Sint64
 SDLTest_RandomSint64BoundaryValue(Sint64 boundary1, Sint64 boundary2, SDL_bool validDomain)
 {
     /* min & max values for Sint64 */
     const Sint64 maxValue = LLONG_MAX;
     const Sint64 minValue = LLONG_MIN;
     return SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
                 boundary1, boundary2,
                 validDomain);
 }

 float
 SDLTest_RandomUnitFloat()
 {
     return (float) SDLTest_RandomUint32() / UINT_MAX;
 }

 float
 SDLTest_RandomFloat()
 {
         return (float) (SDLTest_RandomUnitDouble() * (double)2.0 * (double)FLT_MAX - (double)(FLT_MAX));
 }

 double
 SDLTest_RandomUnitDouble()
 {
     return (double) (SDLTest_RandomUint64() >> 11) * (1.0/9007199254740992.0);
 }

 double
 SDLTest_RandomDouble()
 {
     double r = 0.0;
     double s = 1.0;
     do {
       s /= UINT_MAX + 1.0;
       r += (double)SDLTest_RandomInt(&rndContext) * s;
     } while (s > DBL_EPSILON);

     fuzzerInvocationCounter++;

     return r;
 }


 char *
 SDLTest_RandomAsciiString()
 {
     return SDLTest_RandomAsciiStringWithMaximumLength(255);
 }

 char *
 SDLTest_RandomAsciiStringWithMaximumLength(int maxLength)
 {
     int size;

     if(maxLength < 1) {
                 SDL_InvalidParamError("maxLength");
         return NULL;
     }

     size = (SDLTest_RandomUint32() % (maxLength + 1));

     return SDLTest_RandomAsciiStringOfSize(size);
 }

 char *
 SDLTest_RandomAsciiStringOfSize(int size)
 {
     char *string;
     int counter;


     if(size < 1) {
                 SDL_InvalidParamError("size");
         return NULL;
     }

     string = (char *)SDL_malloc((size + 1) * sizeof(char));
     if (string==NULL) {
       return NULL;
         }

     for(counter = 0; counter < size; ++counter) {
         string[counter] = (char)SDLTest_RandomIntegerInRange(32, 126);
     }

     string[counter] = '\0';

     fuzzerInvocationCounter++;

     return string;
 }
	/*
	Simple DirectMedia Layer
	Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>

	This software is provided 'as-is', without any express or implied
	warranty. In no event will the authors be held liable for any damages
	arising from the use of this software.

	Permission is granted to anyone to use this software for any purpose,
	including commercial applications, and to alter it and redistribute it
	freely, subject to the following restrictions:

	1. The origin of this software must not be misrepresented; you must not
	claim that you wrote the original software. If you use this software
	in a product, an acknowledgment in the product documentation would be
	appreciated but is not required.
	2. Altered source versions must be plainly marked as such, and must not be
	misrepresented as being the original software.
	3. This notice may not be removed or altered from any source distribution.
	*/

	/*

	Data generators for fuzzing test data in a reproducible way.

	*/

	#include "SDL_config.h"

	/* Visual Studio 2008 doesn't have stdint.h */
	#if defined(_MSC_VER) && _MSC_VER <= 1500
	#define UINT8_MAX ~(Uint8)0
	#define UINT16_MAX ~(Uint16)0
	#define UINT32_MAX ~(Uint32)0
	#define UINT64_MAX ~(Uint64)0
	#else
	#define _GNU_SOURCE
	#include <stdint.h>
	#endif
	#include <stdio.h>
	#include <stdlib.h>
	#include <limits.h>
	#include <float.h>

	#include "SDL_test.h"

	/**
	* Counter for fuzzer invocations
	*/
	static int fuzzerInvocationCounter = 0;

	/**
	* Context for shared random number generator
	*/
	static SDLTest_RandomContext rndContext;

	/*
	* Note: doxygen documentation markup for functions is in the header file.
	*/

	void
	SDLTest_FuzzerInit(Uint64 execKey)
	{
	Uint32 a = (execKey >> 32) & 0x00000000FFFFFFFF;
	Uint32 b = execKey & 0x00000000FFFFFFFF;
	SDL_memset((void *)&rndContext, 0, sizeof(SDLTest_RandomContext));
	SDLTest_RandomInit(&rndContext, a, b);
	fuzzerInvocationCounter = 0;
	}

	int
	SDLTest_GetFuzzerInvocationCount()
	{
	return fuzzerInvocationCounter;
	}

	Uint8
	SDLTest_RandomUint8()
	{
	fuzzerInvocationCounter++;

	return (Uint8) SDLTest_RandomInt(&rndContext) & 0x000000FF;
	}

	Sint8
	SDLTest_RandomSint8()
	{
	fuzzerInvocationCounter++;

	return (Sint8) SDLTest_RandomInt(&rndContext) & 0x000000FF;
	}

	Uint16
	SDLTest_RandomUint16()
	{
	fuzzerInvocationCounter++;

	return (Uint16) SDLTest_RandomInt(&rndContext) & 0x0000FFFF;
	}

	Sint16
	SDLTest_RandomSint16()
	{
	fuzzerInvocationCounter++;

	return (Sint16) SDLTest_RandomInt(&rndContext) & 0x0000FFFF;
	}

	Sint32
	SDLTest_RandomSint32()
	{
	fuzzerInvocationCounter++;

	return (Sint32) SDLTest_RandomInt(&rndContext);
	}

	Uint32
	SDLTest_RandomUint32()
	{
	fuzzerInvocationCounter++;

	return (Uint32) SDLTest_RandomInt(&rndContext);
	}

	Uint64
	SDLTest_RandomUint64()
	{
	Uint64 value = 0;
	Uint32 vp = (void )&value;

	fuzzerInvocationCounter++;

	vp[0] = SDLTest_RandomSint32();
	vp[1] = SDLTest_RandomSint32();

	return value;
	}

	Sint64
	SDLTest_RandomSint64()
	{
	Uint64 value = 0;
	Uint32 vp = (void )&value;

	fuzzerInvocationCounter++;

	vp[0] = SDLTest_RandomSint32();
	vp[1] = SDLTest_RandomSint32();

	return value;
	}



	Sint32
	SDLTest_RandomIntegerInRange(Sint32 pMin, Sint32 pMax)
	{
	Sint64 min = pMin;
	Sint64 max = pMax;
	Sint64 temp;
	Sint64 number;

	if(pMin > pMax) {
	temp = min;
	min = max;
	max = temp;
	} else if(pMin == pMax) {
	return (Sint32)min;
	}

	number = SDLTest_RandomUint32();
	/* invocation count increment in preceeding call */

	return (Sint32)((number % ((max + 1) - min)) + min);
	}

	/* !
	* Generates a unsigned boundary value between the given boundaries.
	* Boundary values are inclusive. See the examples below.
	* If boundary2 < boundary1, the values are swapped.
	* If boundary1 == boundary2, value of boundary1 will be returned
	*
	* Generating boundary values for Uint8:
	* BoundaryValues(UINT8_MAX, 10, 20, True) -> [10,11,19,20]
	* BoundaryValues(UINT8_MAX, 10, 20, False) -> [9,21]
	* BoundaryValues(UINT8_MAX, 0, 15, True) -> [0, 1, 14, 15]
	* BoundaryValues(UINT8_MAX, 0, 15, False) -> [16]
	* BoundaryValues(UINT8_MAX, 0, 0xFF, False) -> [0], error set
	*
	* Generator works the same for other types of unsigned integers.
	*
	* \param maxValue The biggest value that is acceptable for this data type.
	* For instance, for Uint8 -> 255, Uint16 -> 65536 etc.
	* \param boundary1 defines lower boundary
	* \param boundary2 defines upper boundary
	* \param validDomain Generate only for valid domain (for the data type)
	*
	* \returns Returns a random boundary value for the domain or 0 in case of error
	*/
	Uint64
	SDLTest_GenerateUnsignedBoundaryValues(const Uint64 maxValue, Uint64 boundary1, Uint64 boundary2, SDL_bool validDomain)
	{
	Uint64 b1, b2;
	Uint64 delta;
	Uint64 tempBuf[4];
	Uint8 index;

	/* Maybe swap */
	if (boundary1 > boundary2) {
	b1 = boundary2;
	b2 = boundary1;
	} else {
	b1 = boundary1;
	b2 = boundary2;
	}

	index = 0;
	if (validDomain == SDL_TRUE) {
	if (b1 == b2) {
	return b1;
	}

	/* Generate up to 4 values within bounds */
	delta = b2 - b1;
	if (delta < 4) {
	do {
	tempBuf[index] = b1 + index;
	index++;
	} while (index < delta);
	} else {
	tempBuf[index] = b1;
	index++;
	tempBuf[index] = b1 + 1;
	index++;
	tempBuf[index] = b2 - 1;
	index++;
	tempBuf[index] = b2;
	index++;
	}
	} else {
	/* Generate up to 2 values outside of bounds */
	if (b1 > 0) {
	tempBuf[index] = b1 - 1;
	index++;
	}

	if (b2 < maxValue) {
	tempBuf[index] = b2 + 1;
	index++;
	}
	}

	if (index == 0) {
	/* There are no valid boundaries */
	SDL_Unsupported();
	return 0;
	}

	return tempBuf[SDLTest_RandomUint8() % index];
	}


	Uint8
	SDLTest_RandomUint8BoundaryValue(Uint8 boundary1, Uint8 boundary2, SDL_bool validDomain)
	{
	/* max value for Uint8 */
	const Uint64 maxValue = UCHAR_MAX;
	return (Uint8)SDLTest_GenerateUnsignedBoundaryValues(maxValue,
	(Uint64) boundary1, (Uint64) boundary2,
	validDomain);
	}

	Uint16
	SDLTest_RandomUint16BoundaryValue(Uint16 boundary1, Uint16 boundary2, SDL_bool validDomain)
	{
	/* max value for Uint16 */
	const Uint64 maxValue = USHRT_MAX;
	return (Uint16)SDLTest_GenerateUnsignedBoundaryValues(maxValue,
	(Uint64) boundary1, (Uint64) boundary2,
	validDomain);
	}

	Uint32
	SDLTest_RandomUint32BoundaryValue(Uint32 boundary1, Uint32 boundary2, SDL_bool validDomain)
	{
	/* max value for Uint32 */
	#if ((ULONG_MAX) == (UINT_MAX))
	const Uint64 maxValue = ULONG_MAX;
	#else
	const Uint64 maxValue = UINT_MAX;
	#endif
	return (Uint32)SDLTest_GenerateUnsignedBoundaryValues(maxValue,
	(Uint64) boundary1, (Uint64) boundary2,
	validDomain);
	}

	Uint64
	SDLTest_RandomUint64BoundaryValue(Uint64 boundary1, Uint64 boundary2, SDL_bool validDomain)
	{
	/* max value for Uint64 */
	const Uint64 maxValue = ULLONG_MAX;
	return SDLTest_GenerateUnsignedBoundaryValues(maxValue,
	(Uint64) boundary1, (Uint64) boundary2,
	validDomain);
	}

	/* !
	* Generates a signed boundary value between the given boundaries.
	* Boundary values are inclusive. See the examples below.
	* If boundary2 < boundary1, the values are swapped.
	* If boundary1 == boundary2, value of boundary1 will be returned
	*
	* Generating boundary values for Sint8:
	* SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -10, 20, True) -> [-10,-9,19,20]
	* SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -10, 20, False) -> [-11,21]
	* SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -30, -15, True) -> [-30, -29, -16, -15]
	* SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -127, 15, False) -> [16]
	* SignedBoundaryValues(SCHAR_MIN, SCHAR_MAX, -127, 127, False) -> [0], error set
	*
	* Generator works the same for other types of signed integers.
	*
	* \param minValue The smallest value that is acceptable for this data type.
	* For instance, for Uint8 -> -127, etc.
	* \param maxValue The biggest value that is acceptable for this data type.
	* For instance, for Uint8 -> 127, etc.
	* \param boundary1 defines lower boundary
	* \param boundary2 defines upper boundary
	* \param validDomain Generate only for valid domain (for the data type)
	*
	* \returns Returns a random boundary value for the domain or 0 in case of error
	*/
	Sint64
	SDLTest_GenerateSignedBoundaryValues(const Sint64 minValue, const Sint64 maxValue, Sint64 boundary1, Sint64 boundary2, SDL_bool validDomain)
	{
	Sint64 b1, b2;
	Sint64 delta;
	Sint64 tempBuf[4];
	Uint8 index;

	/* Maybe swap */
	if (boundary1 > boundary2) {
	b1 = boundary2;
	b2 = boundary1;
	} else {
	b1 = boundary1;
	b2 = boundary2;
	}

	index = 0;
	if (validDomain == SDL_TRUE) {
	if (b1 == b2) {
	return b1;
	}

	/* Generate up to 4 values within bounds */
	delta = b2 - b1;
	if (delta < 4) {
	do {
	tempBuf[index] = b1 + index;
	index++;
	} while (index < delta);
	} else {
	tempBuf[index] = b1;
	index++;
	tempBuf[index] = b1 + 1;
	index++;
	tempBuf[index] = b2 - 1;
	index++;
	tempBuf[index] = b2;
	index++;
	}
	} else {
	/* Generate up to 2 values outside of bounds */
	if (b1 > minValue) {
	tempBuf[index] = b1 - 1;
	index++;
	}

	if (b2 < maxValue) {
	tempBuf[index] = b2 + 1;
	index++;
	}
	}

	if (index == 0) {
	/* There are no valid boundaries */
	SDL_Unsupported();
	return minValue;
	}

	return tempBuf[SDLTest_RandomUint8() % index];
	}


	Sint8
	SDLTest_RandomSint8BoundaryValue(Sint8 boundary1, Sint8 boundary2, SDL_bool validDomain)
	{
	/* min & max values for Sint8 */
	const Sint64 maxValue = SCHAR_MAX;
	const Sint64 minValue = SCHAR_MIN;
	return (Sint8)SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
	(Sint64) boundary1, (Sint64) boundary2,
	validDomain);
	}

	Sint16
	SDLTest_RandomSint16BoundaryValue(Sint16 boundary1, Sint16 boundary2, SDL_bool validDomain)
	{
	/* min & max values for Sint16 */
	const Sint64 maxValue = SHRT_MAX;
	const Sint64 minValue = SHRT_MIN;
	return (Sint16)SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
	(Sint64) boundary1, (Sint64) boundary2,
	validDomain);
	}

	Sint32
	SDLTest_RandomSint32BoundaryValue(Sint32 boundary1, Sint32 boundary2, SDL_bool validDomain)
	{
	/* min & max values for Sint32 */
	#if ((ULONG_MAX) == (UINT_MAX))
	const Sint64 maxValue = LONG_MAX;
	const Sint64 minValue = LONG_MIN;
	#else
	const Sint64 maxValue = INT_MAX;
	const Sint64 minValue = INT_MIN;
	#endif
	return (Sint32)SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
	(Sint64) boundary1, (Sint64) boundary2,
	validDomain);
	}

	Sint64
	SDLTest_RandomSint64BoundaryValue(Sint64 boundary1, Sint64 boundary2, SDL_bool validDomain)
	{
	/* min & max values for Sint64 */
	const Sint64 maxValue = LLONG_MAX;
	const Sint64 minValue = LLONG_MIN;
	return SDLTest_GenerateSignedBoundaryValues(minValue, maxValue,
	boundary1, boundary2,
	validDomain);
	}

	float
	SDLTest_RandomUnitFloat()
	{
	return (float) SDLTest_RandomUint32() / UINT_MAX;
	}

	float
	SDLTest_RandomFloat()
	{
	return (float) (SDLTest_RandomUnitDouble() * (double)2.0 * (double)FLT_MAX - (double)(FLT_MAX));
	}

	double
	SDLTest_RandomUnitDouble()
	{
	return (double) (SDLTest_RandomUint64() >> 11) * (1.0/9007199254740992.0);
	}

	double
	SDLTest_RandomDouble()
	{
	double r = 0.0;
	double s = 1.0;
	do {
	s /= UINT_MAX + 1.0;
	r += (double)SDLTest_RandomInt(&rndContext) * s;
	} while (s > DBL_EPSILON);

	fuzzerInvocationCounter++;

	return r;
	}


	char *
	SDLTest_RandomAsciiString()
	{
	return SDLTest_RandomAsciiStringWithMaximumLength(255);
	}

	char *
	SDLTest_RandomAsciiStringWithMaximumLength(int maxLength)
	{
	int size;

	if(maxLength < 1) {
	SDL_InvalidParamError("maxLength");
	return NULL;
	}

	size = (SDLTest_RandomUint32() % (maxLength + 1));

	return SDLTest_RandomAsciiStringOfSize(size);
	}

	char *
	SDLTest_RandomAsciiStringOfSize(int size)
	{
	char *string;
	int counter;


	if(size < 1) {
	SDL_InvalidParamError("size");
	return NULL;
	}

	string = (char )SDL_malloc((size + 1) sizeof(char));
	if (string==NULL) {
	return NULL;
	}

	for(counter = 0; counter < size; ++counter) {
	string[counter] = (char)SDLTest_RandomIntegerInRange(32, 126);
	}

	string[counter] = '\0';

	fuzzerInvocationCounter++;

	return string;
	}