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Fix bug 1560 - SDL_RWFromConstMem write operation returns -1 but should return 0.

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This commit is contained in:
Andreas Schiffler 2013-03-12 09:10:37 -07:00
parent f25403ba28
commit 6a2bff0cd1
3 changed files with 9 additions and 8 deletions
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2
include/SDL_rwops.h
View File

@ -54,7 +54,7 @@ typedef struct SDL_RWops
* Seek to \c offset relative to \c whence, one of stdio's whence values:
* RW_SEEK_SET, RW_SEEK_CUR, RW_SEEK_END
*
* \return the final offset in the data stream.
* \return the final offset in the data stream, or -1 on error.
*/
Sint64 (SDLCALL * seek) (struct SDL_RWops * context, Sint64 offset,
int whence);

2
src/file/SDL_rwops.c
View File

@ -451,7 +451,7 @@ static size_t SDLCALL
mem_writeconst(SDL_RWops * context, const void *ptr, size_t size, size_t num)
{
SDL_SetError("Can't write to read-only memory");
return (-1);
return (0);
}
static int SDLCALL

13
test/testautomation_rwops.c
View File

@ -78,6 +78,7 @@ _testGenericRWopsValidations(SDL_RWops *rw, int write)
{
char buf[sizeof(RWopsHelloWorldTestString)];
Sint64 i;
size_t s;
int seekPos = SDLTest_RandomIntegerInRange(4, 8);
/* Clear buffer */
@ -89,13 +90,13 @@ _testGenericRWopsValidations(SDL_RWops *rw, int write)
SDLTest_AssertCheck(i == (Sint64)0, "Verify seek to 0 with SDL_RWseek (RW_SEEK_SET), expected 0, got %i", i);
/* Test write. */
i = SDL_RWwrite(rw, RWopsHelloWorldTestString, sizeof(RWopsHelloWorldTestString)-1, 1);
s = SDL_RWwrite(rw, RWopsHelloWorldTestString, sizeof(RWopsHelloWorldTestString)-1, 1);
SDLTest_AssertPass("Call to SDL_RWwrite succeeded");
if (write) {
SDLTest_AssertCheck(i == (Sint64)1, "Verify result of writing one byte with SDL_RWwrite, expected 1, got %i", i);
SDLTest_AssertCheck(s == (size_t)1, "Verify result of writing one byte with SDL_RWwrite, expected 1, got %i", s);
}
else {
SDLTest_AssertCheck(i != (Sint64)1, "Verify result of writing with SDL_RWwrite, expected !=1, got %i", i);
SDLTest_AssertCheck(s == (size_t)0, "Verify result of writing with SDL_RWwrite, expected: 0, got %i", s);
}
/* Test seek to random position */
@ -109,13 +110,13 @@ _testGenericRWopsValidations(SDL_RWops *rw, int write)
SDLTest_AssertCheck(i == (Sint64)0, "Verify seek to 0 with SDL_RWseek (RW_SEEK_SET), expected 0, got %i", i);
/* Test read */
i = SDL_RWread( rw, buf, 1, sizeof(RWopsHelloWorldTestString)-1 );
s = SDL_RWread( rw, buf, 1, sizeof(RWopsHelloWorldTestString)-1 );
SDLTest_AssertPass("Call to SDL_RWread succeeded");
SDLTest_AssertCheck(
i == (Sint64)(sizeof(RWopsHelloWorldTestString)-1),
s == (size_t)(sizeof(RWopsHelloWorldTestString)-1),
"Verify result from SDL_RWread, expected %i, got %i",
sizeof(RWopsHelloWorldTestString)-1,
i);
s);
SDLTest_AssertCheck(
SDL_memcmp(buf, RWopsHelloWorldTestString, sizeof(RWopsHelloWorldTestString)-1 ) == 0,
"Verify read bytes match expected string, expected '%s', got '%s'", RWopsHelloWorldTestString, buf);