mirror of
https://github.com/cuberite/libdeflate.git
synced 2025-08-04 02:06:31 -04:00
4c92394eaa
Some users may require a valid DEFLATE, zlib, or gzip stream but know ahead of time that particular inputs are not compressible. zlib supports "level 0" for this use case. Support this in libdeflate too. Resolves https://github.com/ebiggers/libdeflate/issues/86
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
/*
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* test_custom_malloc.c
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*
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* Test libdeflate_set_memory_allocator().
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* Also test injecting allocation failures.
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*/
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#include "test_util.h"
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static int malloc_count = 0;
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static int free_count = 0;
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static void *do_malloc(size_t size)
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{
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malloc_count++;
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return malloc(size);
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}
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static void *do_fail_malloc(size_t size)
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{
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malloc_count++;
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return NULL;
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}
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static void do_free(void *ptr)
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{
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free_count++;
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free(ptr);
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}
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int
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tmain(int argc, tchar *argv[])
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{
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int level;
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struct libdeflate_compressor *c;
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struct libdeflate_decompressor *d;
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begin_program(argv);
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/* Test that the custom allocator is actually used when requested. */
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libdeflate_set_memory_allocator(do_malloc, do_free);
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ASSERT(malloc_count == 0);
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ASSERT(free_count == 0);
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for (level = 0; level <= 12; level++) {
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malloc_count = free_count = 0;
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c = libdeflate_alloc_compressor(level);
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ASSERT(c != NULL);
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ASSERT(malloc_count == 1);
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ASSERT(free_count == 0);
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libdeflate_free_compressor(c);
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ASSERT(malloc_count == 1);
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ASSERT(free_count == 1);
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}
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malloc_count = free_count = 0;
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d = libdeflate_alloc_decompressor();
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ASSERT(d != NULL);
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ASSERT(malloc_count == 1);
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ASSERT(free_count == 0);
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libdeflate_free_decompressor(d);
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ASSERT(malloc_count == 1);
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ASSERT(free_count == 1);
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/* As long as we're here, also test injecting allocation failures. */
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libdeflate_set_memory_allocator(do_fail_malloc, do_free);
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for (level = 0; level <= 12; level++) {
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malloc_count = free_count = 0;
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c = libdeflate_alloc_compressor(level);
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ASSERT(c == NULL);
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ASSERT(malloc_count == 1);
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ASSERT(free_count == 0);
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}
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malloc_count = free_count = 0;
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d = libdeflate_alloc_decompressor();
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ASSERT(d == NULL);
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ASSERT(malloc_count == 1);
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ASSERT(free_count == 0);
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return 0;
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}
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