用c使用lzma sdk 22.01压缩文件

以下是使用LZMA SDK 22.01压缩文件的示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <lzma.h>

int main(int argc, char *argv[]) {
    if (argc != 3) {
        printf("Usage: %s <input_file> <output_file>\n", argv[0]);
        return 1;
    }

    // 打开输入文件
    FILE* f_in = fopen(argv[1], "rb");
    if (!f_in) {
        printf("Failed to open input file: %s\n", argv[1]);
        return 1;
    }

    // 打开输出文件
    FILE* f_out = fopen(argv[2], "wb");
    if (!f_out) {
        printf("Failed to open output file: %s\n", argv[2]);
        fclose(f_in);
        return 1;
    }

    // 初始化压缩器
    lzma_stream strm = LZMA_STREAM_INIT;
    lzma_options_lzma opt_lzma2;
    lzma_lzma_preset(&opt_lzma2, LZMA_PRESET_DEFAULT);
    lzma_ret ret = lzma_stream_encoder(&strm, &opt_lzma2, LZMA_CHECK_CRC64);
    if (ret != LZMA_OK) {
        printf("Failed to initialize encoder: %d\n", ret);
        fclose(f_in);
        fclose(f_out);
        return 1;
    }

    // 读取并压缩数据
    uint8_t in_buf[BUFSIZ];
    uint8_t out_buf[BUFSIZ];
    size_t in_pos = 0, in_size = 0;
    size_t out_pos = 0, out_size = 0;
    while ((in_size = fread(in_buf, 1, BUFSIZ, f_in)) > 0) {
        strm.next_in = in_buf;
        strm.avail_in = in_size;
        do {
            strm.next_out = out_buf;
            strm.avail_out = BUFSIZ;
            ret = lzma_code(&strm, LZMA_RUN);
            if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
                printf("Compression failed: %d\n", ret);
                fclose(f_in);
                fclose(f_out);
                lzma_end(&strm);
                return 1;
            }
            out_size = BUFSIZ - strm.avail_out;
            if (out_size > 0) {
                fwrite(out_buf, 1, out_size, f_out);
            }
        } while (strm.avail_out == 0);
    }

    // 结束压缩
    do {
        strm.next_out = out_buf;
        strm.avail_out = BUFSIZ;
        ret = lzma_code(&strm, LZMA_FINISH);
        if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
            printf("Compression failed: %d\n", ret);
            fclose(f_in);
            fclose(f_out);
            lzma_end(&strm);
            return 1;
        }
        out_size = BUFSIZ - strm.avail_out;
        if (out_size > 0) {
            fwrite(out_buf, 1, out_size, f_out);
        }
    } while (strm.avail_out == 0);

    // 关闭文件和释放资源
    fclose(f_in);
    fclose(f_out);
    lzma_end(&strm);
    return 0;
}

编译命令：`gcc -o compress compress.c -llzma`

使用示例：`./compress input.txt output.lzma`