Add fuzzer to test lib

1 files changed, 371 insertions, 0 deletions

diff --git a/include/SDL_test_fuzzer.h b/include/SDL_test_fuzzer.h
new file mode 100644
index 0000000000..8cd05f098c
--- /dev/null
+++ b/include/SDL_test_fuzzer.h
@@ -0,0 +1,371 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 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.
+*/
+
+/**
+ *  \file SDL_test_fuzzer.h
+ *  
+ *  Include file for SDL test framework.
+ *
+ *  This code is a part of the SDL2_test library, not the main SDL library.
+ */
+
+/* 
+
+  Data generators for fuzzing test data in a reproducible way.
+ 
+*/
+
+#ifndef _SDL_test_fuzzer_h
+#define _SDL_test_fuzzer_h
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+extern "C" {
+/* *INDENT-ON* */
+#endif
+
+
+/*
+  Based on GSOC code by Markus Kauppila <markus.kauppila@gmail.com>
+*/
+
+
+/**
+ * \file
+ * Note: The fuzzer implementation uses a static instance of random context
+ * internally which makes it thread-UNsafe.
+ */
+
+/**
+ * Initializes the fuzzer for a test
+ *
+ * /param execKey Execution "Key" that initializes the random number generator uniquely for the test.
+ *
+ */
+void SDLTest_FuzzerInit(Uint64 execKey);
+
+
+/**
+ * Returns a random Uint8
+ *
+ * \returns Generated integer
+ */
+Uint8 SDLTest_RandomUint8();
+
+/**
+ * Returns a random Sint8
+ *
+ * \returns Generated signed integer
+ */
+Sint8 SDLTest_RandomSint8();
+
+
+/**
+ * Returns a random Uint16
+ *
+ * \returns Generated integer
+ */
+Uint16 SDLTest_RandomUint16();
+
+/**
+ * Returns a random Sint16
+ *
+ * \returns Generated signed integer
+ */
+Sint16 SDLTest_RandomSint16();
+
+
+/**
+ * Returns a random integer
+ *
+ * \returns Generated integer
+ */
+Sint32 SDLTest_RandomSint32();
+
+
+/**
+ * Returns a random positive integer
+ *
+ * \returns Generated integer
+ */
+Uint32 SDLTest_RandomUint32();
+
+/**
+ * Returns random Uint64.
+ *
+ * \returns Generated integer
+ */
+Uint64 SDLTest_RandomUint64();
+
+
+/**
+ * Returns random Sint64.
+ *
+ * \returns Generated signed integer
+ */
+Sint64 SDLTest_RandomSint64();
+
+/**
+ * \returns random float in range [0.0 - 1.0[
+ */
+float SDLTest_RandomUnitFloat();
+
+/**
+ * \returns random double in range [0.0 - 1.0[ 
+ */
+double SDLTest_RandomUnitDouble();
+
+/**
+ * \returns random float.
+ *
+ */
+float SDLTest_RandomFloat();
+
+/**
+ * \returns random double.
+ *
+ */
+double SDLTest_RandomDouble();
+
+/**
+ * Returns a random boundary value for Uint8 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomUint8BoundaryValue(10, 20, SDL_TRUE) returns 10, 11, 19 or 20
+ * RandomUint8BoundaryValue(1, 20, SDL_FALSE) returns 0 or 21
+ * RandomUint8BoundaryValue(0, 99, SDL_FALSE) returns 100
+ * RandomUint8BoundaryValue(0, 255, SDL_FALSE) returns -1 (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Uint8 SDLTest_RandomUint8BoundaryValue(Uint8 boundary1, Uint8 boundary2, SDL_bool validDomain);
+
+/**
+ * Returns a random boundary value for Uint16 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomUint16BoundaryValue(10, 20, SDL_TRUE) returns 10, 11, 19 or 20
+ * RandomUint16BoundaryValue(1, 20, SDL_FALSE) returns 0 or 21
+ * RandomUint16BoundaryValue(0, 99, SDL_FALSE) returns 100
+ * RandomUint16BoundaryValue(0, 0xFFFF, SDL_FALSE) returns -1 (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Uint16 SDLTest_RandomUint16BoundaryValue(Uint16 boundary1, Uint16 boundary2, SDL_bool validDomain);
+
+/**
+ * Returns a random boundary value for Uint32 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomUint32BoundaryValue(10, 20, SDL_TRUE) returns 10, 11, 19 or 20
+ * RandomUint32BoundaryValue(1, 20, SDL_FALSE) returns 0 or 21
+ * RandomUint32BoundaryValue(0, 99, SDL_FALSE) returns 100
+ * RandomUint32BoundaryValue(0, 0xFFFFFFFF, SDL_FALSE) returns -1 (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Uint32 SDLTest_RandomUint32BoundaryValue(Uint32 boundary1, Uint32 boundary2, SDL_bool validDomain);
+
+/**
+ * Returns a random boundary value for Uint64 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomUint64BoundaryValue(10, 20, SDL_TRUE) returns 10, 11, 19 or 20
+ * RandomUint64BoundaryValue(1, 20, SDL_FALSE) returns 0 or 21
+ * RandomUint64BoundaryValue(0, 99, SDL_FALSE) returns 100
+ * RandomUint64BoundaryValue(0, 0xFFFFFFFFFFFFFFFF, SDL_FALSE) returns -1 (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Uint64 SDLTest_RandomUint64BoundaryValue(Uint64 boundary1, Uint64 boundary2, SDL_bool validDomain);
+
+/**
+ * Returns a random boundary value for Sint8 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomSint8BoundaryValue(-10, 20, SDL_TRUE) returns -11, -10, 19 or 20
+ * RandomSint8BoundaryValue(-100, -10, SDL_FALSE) returns -101 or -9
+ * RandomSint8BoundaryValue(-128, 99, SDL_FALSE) returns 100
+ * RandomSint8BoundaryValue(-128, 127, SDL_FALSE) returns SINT8_MIN (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Sint8 SDLTest_RandomSint8BoundaryValue(Sint8 boundary1, Sint8 boundary2, SDL_bool validDomain);
+
+
+/**
+ * Returns a random boundary value for Sint16 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomSint16BoundaryValue(-10, 20, SDL_TRUE) returns -11, -10, 19 or 20
+ * RandomSint16BoundaryValue(-100, -10, SDL_FALSE) returns -101 or -9
+ * RandomSint16BoundaryValue(SINT8_MIN, 99, SDL_FALSE) returns 100
+ * RandomSint16BoundaryValue(SINT8_MIN, SINT8_MAX, SDL_FALSE) returns SINT16_MIN (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Sint16 SDLTest_RandomSint16BoundaryValue(Sint16 boundary1, Sint16 boundary2, SDL_bool validDomain);
+
+/**
+ * Returns a random boundary value for Sint32 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomSint32BoundaryValue(-10, 20, SDL_TRUE) returns -11, -10, 19 or 20
+ * RandomSint32BoundaryValue(-100, -10, SDL_FALSE) returns -101 or -9
+ * RandomSint32BoundaryValue(SINT32_MIN, 99, SDL_FALSE) returns 100
+ * RandomSint32BoundaryValue(SINT32_MIN, SINT32_MAX, SDL_FALSE) returns SINT32_MIN (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Sint32 SDLTest_RandomSint32BoundaryValue(Sint32 boundary1, Sint32 boundary2, SDL_bool validDomain);
+
+/**
+ * Returns a random boundary value for Sint64 within the given boundaries.
+ * Boundaries are inclusive, see the usage examples below. If validDomain
+ * is true, the function will only return valid boundaries, otherwise non-valid
+ * boundaries are also possible.
+ * If boundary1 > boundary2, the values are swapped
+ *
+ * Usage examples:
+ * RandomSint64BoundaryValue(-10, 20, SDL_TRUE) returns -11, -10, 19 or 20
+ * RandomSint64BoundaryValue(-100, -10, SDL_FALSE) returns -101 or -9
+ * RandomSint64BoundaryValue(SINT64_MIN, 99, SDL_FALSE) returns 100
+ * RandomSint64BoundaryValue(SINT64_MIN, SINT32_MAX, SDL_FALSE) returns SINT64_MIN (== error value)
+ *
+ * \param boundary1 Lower boundary limit
+ * \param boundary2 Upper boundary limit
+ * \param validDomain Should the generated boundary be valid or not?
+ *
+ * \returns Boundary value in given range or error value (-1)
+ */
+Sint64 SDLTest_RandomSint64BoundaryValue(Sint64 boundary1, Sint64 boundary2, SDL_bool validDomain);
+
+
+/**
+ * Returns integer in range [min, max] (inclusive).
+ * Min and max values can be negative values.
+ * If Max in smaller tham min, then the values are swapped.
+ * Min and max are the same value, that value will be returned.
+ *
+ * \returns Generated integer
+ */
+Sint32 SDLTest_RandomIntegerInRange(Sint32 min, Sint32 max);
+
+
+/**
+ * Generates random null-terminated string. The maximum length for
+ * the string is 255 characters and it can contain ASCII characters
+ * from 1 to 127.
+ *
+ * Note: Returned string needs to be deallocated.
+ *
+ * \returns newly allocated random string
+ */
+char * SDLTest_RandomAsciiString();
+
+
+/**
+ * Generates random null-terminated string. The maximum length for
+ * the string is defined by maxLenght parameter.
+ * String can contain ASCII characters from 1 to 127.
+ *
+ * Note: Returned string needs to be deallocated.
+ *
+ * \param maxLength Maximum length of the generated string
+ *
+ * \returns newly allocated random string
+ */
+char * SDLTest_RandomAsciiStringWithMaximumLength(int maxLength);
+
+/**
+ * Returns the invocation count for the fuzzer since last ...FuzzerInit.
+ */
+int SDLTest_GetFuzzerInvocationCount();
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+/* *INDENT-OFF* */
+}
+/* *INDENT-ON* */
+#endif
+#include "close_code.h"
+
+#endif /* _SDL_test_fuzzer_h */
+
+/* vi: set ts=4 sw=4 expandtab: */