Aegisub/vendor/luabins/test/test_savebuffer.c

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/*
* test_savebuffer.c
* Luabins SaveBuffer tests
* See copyright notice in luabins.h
*/
/*
* TODO: Tests are tuned for old fixed-increment memory allocation strategy.
* Test for exponential growth corner-cases specifically.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lualess.h"
#include "savebuffer.h"
#include "test.h"
/******************************************************************************/
static size_t NOT_CHANGED = (size_t)-1;
static void * NOT_CHANGED_PTR = NULL;
static size_t DUMMY = (size_t)-42;
static void * DUMMY_PTR = NULL;
static void * g_last_ud = NULL;
static size_t g_last_osize = 0;
static void reset_alloc_globals()
{
g_last_ud = NOT_CHANGED_PTR;
g_last_osize = NOT_CHANGED;
}
static void init_globals()
{
NOT_CHANGED_PTR = (void *)&NOT_CHANGED;
DUMMY_PTR = (void *)&DUMMY;
reset_alloc_globals();
}
static void * dummy_alloc(
void * ud,
void * ptr,
size_t osize,
size_t nsize
)
{
g_last_ud = ud;
g_last_osize = osize;
if (nsize == 0)
{
free(ptr);
return NULL;
}
else
{
return realloc(ptr, nsize);
}
}
/******************************************************************************/
static void check_alloc(void * expected_ud, size_t expected_osize)
{
if (g_last_ud != expected_ud)
{
fprintf(
stderr,
"userdata mismatch in allocator: got %p, expected %p\n",
g_last_ud, expected_ud
);
exit(1);
}
if (g_last_osize != expected_osize)
{
fprintf(
stderr,
"old size mismatch in allocator: got %lu, expected %lu\n",
g_last_osize, expected_osize
);
exit(1);
}
reset_alloc_globals();
}
static void check_buffer(
luabins_SaveBuffer * sb,
const char * expected_buf_c,
size_t expected_length,
void * expected_ud,
size_t expected_osize
)
{
const unsigned char * expected_buf = (const unsigned char *)expected_buf_c;
{
size_t actual_length = lbsSB_length(sb);
if (actual_length != expected_length)
{
fprintf(
stderr,
"lbsSB_length mismatch in allocator: got %lu, expected %lu\n",
actual_length, expected_length
);
exit(1);
}
}
{
size_t actual_length = (size_t)-1;
const unsigned char * actual_buf = lbsSB_buffer(sb, &actual_length);
if (actual_length != expected_length)
{
fprintf(
stderr,
"lsbSB_buffer length mismatch in allocator: got %lu, expected %lu\n",
actual_length, expected_length
);
exit(1);
}
if (memcmp(actual_buf, expected_buf, expected_length) != 0)
{
fprintf(
stderr,
"lsbSB_buffer buf mismatch in allocator\n"
);
exit(1);
}
}
check_alloc(expected_ud, expected_osize);
}
/******************************************************************************/
TEST (test_init_destroy,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
check_buffer(&sb, "", 0, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(NOT_CHANGED_PTR, NOT_CHANGED);
})
TEST (test_grow_zero,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_grow(&sb, 0);
check_buffer(&sb, "", 0, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(NOT_CHANGED_PTR, NOT_CHANGED);
})
TEST (test_grow_bufsiz,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_grow(&sb, 1024);
check_buffer(&sb, "", 0, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 1344);
})
TEST (test_grow_one,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_grow(&sb, 1);
check_buffer(&sb, "", 0, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_grow_one_grow_one_noop,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_grow(&sb, 1);
check_buffer(&sb, "", 0, DUMMY_PTR, 0);
lbsSB_grow(&sb, 1);
check_buffer(&sb, "", 0, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_grow_one_grow_bufsiz_noop,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_grow(&sb, 1);
check_buffer(&sb, "", 0, DUMMY_PTR, 0);
lbsSB_grow(&sb, 255);
check_buffer(&sb, "", 0, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_grow_one_grow_bufsiz_one,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_grow(&sb, 1);
check_buffer(&sb, "", 0, DUMMY_PTR, 0);
lbsSB_grow(&sb, 257);
check_buffer(&sb, "", 0, DUMMY_PTR, 256);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 512);
})
/******************************************************************************/
TEST (test_write_empty,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"", 0);
check_buffer(&sb, "", 0, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(NOT_CHANGED_PTR, NOT_CHANGED);
})
TEST (test_write,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"42", 3);
check_buffer(&sb, "42", 3, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_write_embedded_zero,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"4\02", 4);
check_buffer(&sb, "4\02", 4, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_write_write_smallsiz,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"01234567", 8);
check_buffer(&sb, "01234567", 8, DUMMY_PTR, 0);
lbsSB_write(&sb, (unsigned char*)"01234567", 8);
check_buffer(&sb, "0123456701234567", 8 + 8, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_write(&sb, (unsigned char*)"0123", 4);
check_buffer(
&sb,
"01234567012345670123",
8 + 8 + 4,
NOT_CHANGED_PTR,
NOT_CHANGED
);
lbsSB_write(&sb, (unsigned char*)"0123456789ABCDEF", 16);
check_buffer(
&sb,
"012345670123456701230123456789ABCDEF",
8 + 8 + 4 + 16,
NOT_CHANGED_PTR,
NOT_CHANGED
);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
/******************************************************************************/
TEST (test_writechar,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_writechar(&sb, 'A');
check_buffer(&sb, "A", 1, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_writechar_zero,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_writechar(&sb, '\0');
check_buffer(&sb, "\0", 1, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_write_writechar_smallsiz,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"01234567", 8);
check_buffer(&sb, "01234567", 8, DUMMY_PTR, 0);
lbsSB_writechar(&sb, 'A');
check_buffer(&sb, "01234567A", 8 + 1, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
/******************************************************************************/
TEST (test_overwrite_empty,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_overwrite(&sb, 0, (unsigned char*)"42", 3);
check_buffer(&sb, "42", 3, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_overwrite_inplace,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"ABCD", 4);
check_buffer(&sb, "ABCD", 4, DUMMY_PTR, 0);
lbsSB_overwrite(&sb, 1, (unsigned char*)"42", 2);
check_buffer(&sb, "A42D", 4, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_overwrite_overflow,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"ABCD", 4);
check_buffer(&sb, "ABCD", 4, DUMMY_PTR, 0);
lbsSB_overwrite(&sb, 3, (unsigned char*)"42", 2);
check_buffer(&sb, "ABC42", 5, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_overwrite_overflow_grows,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"012345", 6);
check_buffer(&sb, "012345", 6, DUMMY_PTR, 0);
lbsSB_overwrite(&sb, 4, (unsigned char*)"ABCDEF", 6);
check_buffer(&sb, "0123ABCDEF", 10, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_overwrite_large_offset_appends,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"012345", 6);
check_buffer(&sb, "012345", 6, DUMMY_PTR, 0);
lbsSB_overwrite(&sb, 100, (unsigned char*)"ABCDEF", 6);
check_buffer(&sb, "012345ABCDEF", 12, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
/******************************************************************************/
TEST (test_overwritechar_empty_buffer,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_overwritechar(&sb, 0, 'A');
check_buffer(&sb, "A", 1, DUMMY_PTR, 0);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_overwritechar_inplace,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"ABCD", 4);
check_buffer(&sb, "ABCD", 4, DUMMY_PTR, 0);
lbsSB_overwritechar(&sb, 1, '!');
check_buffer(&sb, "A!CD", 4, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
TEST (test_overwritechar_large_offset_appends,
{
luabins_SaveBuffer sb;
lbsSB_init(&sb, dummy_alloc, DUMMY_PTR);
lbsSB_write(&sb, (unsigned char*)"01234567", 8);
check_buffer(&sb, "01234567", 8, DUMMY_PTR, 0);
lbsSB_overwritechar(&sb, 100, '!');
check_buffer(&sb, "01234567!", 9, NOT_CHANGED_PTR, NOT_CHANGED);
lbsSB_destroy(&sb);
check_alloc(DUMMY_PTR, 256);
})
/******************************************************************************/
void test_savebuffer()
{
init_globals();
test_init_destroy();
test_grow_zero();
test_grow_bufsiz();
test_grow_one();
test_grow_one_grow_one_noop();
test_grow_one_grow_bufsiz_noop();
test_grow_one_grow_bufsiz_one();
test_write_empty();
test_write();
test_write_embedded_zero();
test_write_write_smallsiz();
test_writechar();
test_writechar_zero();
test_write_writechar_smallsiz();
test_overwrite_empty();
test_overwrite_inplace();
test_overwrite_overflow();
test_overwrite_overflow_grows();
test_overwrite_large_offset_appends();
test_overwritechar_empty_buffer();
test_overwritechar_inplace();
test_overwritechar_large_offset_appends();
}