45 lines
1.6 KiB
V
45 lines
1.6 KiB
V
module compress
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#flag -I @VEXEROOT/thirdparty/zip
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#include "miniz.h"
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pub const max_size = u64(1 << 31)
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fn C.tdefl_compress_mem_to_heap(source_buf voidptr, source_buf_len usize, out_len &usize, flags int) voidptr
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fn C.tinfl_decompress_mem_to_heap(source_buf voidptr, source_buf_len usize, out_len &usize, flags int) voidptr
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// compresses an array of bytes based on providing flags and returns the compressed bytes in a new array
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// NB: this is a low level api, a high level implementation like zlib/gzip should be preferred
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[manualfree]
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pub fn compress(data []u8, flags int) ?[]u8 {
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if u64(data.len) > compress.max_size {
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return error('data too large ($data.len > $compress.max_size)')
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}
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mut out_len := usize(0)
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address := C.tdefl_compress_mem_to_heap(data.data, data.len, &out_len, flags)
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if address == 0 {
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return error('compression failed')
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}
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if u64(out_len) > compress.max_size {
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return error('compressed data is too large ($out_len > $compress.max_size)')
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}
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return unsafe { address.vbytes(int(out_len)) }
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}
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// decompresses an array of bytes based on providing flags and returns the decompressed bytes in a new array
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// NB: this is a low level api, a high level implementation like zlib/gzip should be preferred
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[manualfree]
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pub fn decompress(data []u8, flags int) ?[]u8 {
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mut out_len := usize(0)
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address := C.tinfl_decompress_mem_to_heap(data.data, data.len, &out_len, flags)
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if address == 0 {
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return error('decompression failed')
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}
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if u64(out_len) > compress.max_size {
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return error('decompressed data is too large ($out_len > $compress.max_size)')
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}
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return unsafe { address.vbytes(int(out_len)) }
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}
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