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Fixed printf formatting for "%p" and added a unit test to check it

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(cherry picked from commit c63aa9545eb800390176fd2fd86036da81f91100)
This commit is contained in:
Sam Lantinga 2023-07-05 13:33:11 -07:00
parent 2a946832ba
commit 1ab452fc57
2 changed files with 23 additions and 0 deletions
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17
src/stdlib/SDL_string.c
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@ -1662,6 +1662,20 @@ static size_t SDL_PrintFloat(char *text, size_t maxlen, SDL_FormatInfo *info, do
return length;
}
static size_t SDL_PrintPointer(char *text, size_t maxlen, SDL_FormatInfo *info, const void *value)
{
char num[130];
size_t length;
if (!value) {
return SDL_PrintString(text, maxlen, info, NULL);
}
SDL_ulltoa((unsigned long long)(uintptr_t)value, num, 16);
length = SDL_PrintString(text, maxlen, info, "0x");
return length + SDL_PrintString(TEXT_AND_LEN_ARGS, info, num);
}
/* NOLINTNEXTLINE(readability-non-const-parameter) */
int SDL_vsnprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, const char *fmt, va_list ap)
{
@ -1794,6 +1808,9 @@ int SDL_vsnprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, const char *f
done = SDL_TRUE;
break;
case 'p':
info.force_case = SDL_CASE_LOWER;
length += SDL_PrintPointer(TEXT_AND_LEN_ARGS, &info, va_arg(ap, void *));
break;
case 'x':
info.force_case = SDL_CASE_LOWER;
SDL_FALLTHROUGH;

6
test/testautomation_stdlib.c
View File

@ -175,6 +175,12 @@ int stdlib_snprintf(void *arg)
SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
SDLTest_AssertCheck(result == 7, "Check result value, expected: 7, got: %d", result);
result = SDL_snprintf(text, sizeof(text), "%p", (void *)0x1234abcd);
expected = "0x1234abcd";
SDLTest_AssertPass("Call to SDL_snprintf(text, sizeof(text), \"%%p\", 0x1234abcd)");
SDLTest_AssertCheck(SDL_strcmp(text, expected) == 0, "Check text, expected: '%s', got: '%s'", expected, text);
SDLTest_AssertCheck(result == SDL_strlen(expected), "Check result value, expected: %d, got: %d", (int)SDL_strlen(expected), result);
return TEST_COMPLETED;
}