Function FIO_compressFilename_srcFile

freebsd/contrib/zstd/programs/fileio.c:1663–1714

! FIO_compressFilename_srcFile() : * @return : 0 : compression completed correctly, * 1 : missing or pb opening srcFileName */

 *            1 : missing or pb opening srcFileName
 */
static int
FIO_compressFilename_srcFile(FIO_ctx_t* const fCtx,
                             FIO_prefs_t* const prefs,
                             cRess_t ress,
                             const char* dstFileName,
                             const char* srcFileName,
                             int compressionLevel)
{
    int result;
    DISPLAYLEVEL(6, "FIO_compressFilename_srcFile: %s \n", srcFileName);

    /* ensure src is not a directory */
    if (UTIL_isDirectory(srcFileName)) {
        DISPLAYLEVEL(1, "zstd: %s is a directory -- ignored \n", srcFileName);
        return 1;
    }

    /* ensure src is not the same as dict (if present) */
    if (ress.dictFileName != NULL && UTIL_isSameFile(srcFileName, ress.dictFileName)) {
        DISPLAYLEVEL(1, "zstd: cannot use %s as an input file and dictionary \n", srcFileName);
        return 1;
    }

    /* Check if "srcFile" is compressed. Only done if --exclude-compressed flag is used
    * YES => ZSTD will skip compression of the file and will return 0.
    * NO => ZSTD will resume with compress operation.
    */
    if (prefs->excludeCompressedFiles == 1 && UTIL_isCompressedFile(srcFileName, compressedFileExtensions)) {
        DISPLAYLEVEL(4, "File is already compressed : %s \n", srcFileName);
        return 0;
    }

    ress.srcFile = FIO_openSrcFile(srcFileName);
    if (ress.srcFile == NULL) return 1;   /* srcFile could not be opened */

    result = FIO_compressFilename_dstFile(fCtx, prefs, ress, dstFileName, srcFileName, compressionLevel);

    fclose(ress.srcFile);
    ress.srcFile = NULL;
    if ( prefs->removeSrcFile   /* --rm */
      && result == 0       /* success */
      && strcmp(srcFileName, stdinmark)   /* exception : don't erase stdin */
      ) {
        /* We must clear the handler, since after this point calling it would
         * delete both the source and destination files.
         */
        clearHandler();
        if (FIO_removeFile(srcFileName))
            EXM_THROW(1, "zstd: %s: %s", srcFileName, strerror(errno));
    }
    return result;
}

int FIO_compressFilename(FIO_ctx_t* const fCtx, FIO_prefs_t* const prefs, const char* dstFileName,
                         const char* srcFileName, const char* dictFileName,