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main.c
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main.c
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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <emscripten/emscripten.h>
#include "compress.h"
#include "decompress.h"
unsigned char *content;
uint32_t size;
unsigned char *decompressedContent;
uint32_t decompressedSize;
EMSCRIPTEN_KEEPALIVE
uint32_t c_decompress(unsigned char *compressedFileContent, size_t compressedFileContentSize) {
if (decompressedContent == NULL) {
free(decompressedContent);
decompressedContent = NULL;
}
DecompressionResult *decompressionResult = decompress(compressedFileContent, compressedFileContentSize);
if (decompressionResult == NULL) {
fprintf(stderr, "failed to decompress at file %s:%d\n", __FILE__, __LINE__);
return -1;
}
decompressedContent = (unsigned char*) calloc(decompressionResult->size, sizeof(unsigned char));
if (decompressedContent == NULL) {
fprintf(stderr, "failed to allocate space for decompressed file buffer at file %s:%d\n", __FILE__, __LINE__);
destroyDecompressionResult(decompressionResult);
return -1;
}
memcpy(decompressedContent, decompressionResult->bytes, decompressionResult->size);
decompressedSize = decompressionResult->size;
destroyDecompressionResult(decompressionResult);
return decompressedSize;
}
EMSCRIPTEN_KEEPALIVE
void collectDecompressedContent(unsigned char *buffer, size_t bufferSize) {
memcpy(buffer, decompressedContent, bufferSize);
free(decompressedContent);
decompressedContent = NULL;
}
EMSCRIPTEN_KEEPALIVE
uint32_t c_compress(unsigned char *fileContent, size_t fileContentSize) {
if (content != NULL) {
free(content);
content = NULL;
}
CompressionResult *result = compress(fileContent, fileContentSize);
if (result == NULL) {
fprintf(stderr, "failed to compress at file %s:%d\n", __FILE__, __LINE__);
return -1;
}
content = (unsigned char*) calloc(result->size, sizeof(unsigned char));
if (content == NULL) {
fprintf(stderr, "failed to allocate space for compressed file buffer at file %s:%d\n", __FILE__, __LINE__);
destroyCompressionResult(result);
return -1;
}
memcpy(content, result->bytes, result->size);
size = result->size;
destroyCompressionResult(result);
return size;
}
EMSCRIPTEN_KEEPALIVE
void receiveContent(unsigned char *buffer, size_t bufferSize) {
memcpy(buffer, content, bufferSize);
free(content);
content = NULL;
}