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1117 lines
36 KiB
1117 lines
36 KiB
/* Copyright 2014 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/* Command line interface for Brotli library. */
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/* Mute strerror/strcpy warnings. */
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#if !defined(_CRT_SECURE_NO_WARNINGS)
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <time.h>
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#include "../common/constants.h"
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#include "../common/version.h"
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#include <brotli/decode.h>
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#include <brotli/encode.h>
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#if !defined(_WIN32)
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#include <unistd.h>
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#include <utime.h>
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#define MAKE_BINARY(FILENO) (FILENO)
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#else
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#include <io.h>
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#include <share.h>
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#include <sys/utime.h>
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#define MAKE_BINARY(FILENO) (_setmode((FILENO), _O_BINARY), (FILENO))
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#if !defined(__MINGW32__)
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#define STDIN_FILENO _fileno(stdin)
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#define STDOUT_FILENO _fileno(stdout)
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#define S_IRUSR S_IREAD
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#define S_IWUSR S_IWRITE
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#endif
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#define fdopen _fdopen
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#define isatty _isatty
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#define unlink _unlink
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#define utimbuf _utimbuf
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#define utime _utime
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#define fopen ms_fopen
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#define open ms_open
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#define chmod(F, P) (0)
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#define chown(F, O, G) (0)
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#if defined(_MSC_VER) && (_MSC_VER >= 1400)
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#define fseek _fseeki64
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#define ftell _ftelli64
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#endif
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static FILE* ms_fopen(const char* filename, const char* mode) {
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FILE* result = 0;
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fopen_s(&result, filename, mode);
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return result;
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}
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static int ms_open(const char* filename, int oflag, int pmode) {
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int result = -1;
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_sopen_s(&result, filename, oflag | O_BINARY, _SH_DENYNO, pmode);
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return result;
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}
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#endif /* WIN32 */
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typedef enum {
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COMMAND_COMPRESS,
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COMMAND_DECOMPRESS,
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COMMAND_HELP,
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COMMAND_INVALID,
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COMMAND_TEST_INTEGRITY,
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COMMAND_NOOP,
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COMMAND_VERSION
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} Command;
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#define DEFAULT_LGWIN 24
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#define DEFAULT_SUFFIX ".br"
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#define MAX_OPTIONS 20
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typedef struct {
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/* Parameters */
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int quality;
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int lgwin;
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int verbosity;
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BROTLI_BOOL force_overwrite;
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BROTLI_BOOL junk_source;
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BROTLI_BOOL copy_stat;
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BROTLI_BOOL write_to_stdout;
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BROTLI_BOOL test_integrity;
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BROTLI_BOOL decompress;
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BROTLI_BOOL large_window;
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const char* output_path;
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const char* suffix;
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int not_input_indices[MAX_OPTIONS];
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size_t longest_path_len;
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size_t input_count;
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/* Inner state */
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int argc;
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char** argv;
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char* modified_path; /* Storage for path with appended / cut suffix */
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int iterator;
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int ignore;
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BROTLI_BOOL iterator_error;
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uint8_t* buffer;
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uint8_t* input;
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uint8_t* output;
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const char* current_input_path;
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const char* current_output_path;
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int64_t input_file_length; /* -1, if impossible to calculate */
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FILE* fin;
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FILE* fout;
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/* I/O buffers */
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size_t available_in;
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const uint8_t* next_in;
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size_t available_out;
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uint8_t* next_out;
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/* Reporting */
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/* size_t would be large enough,
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until 4GiB+ files are compressed / decompressed on 32-bit CPUs. */
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size_t total_in;
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size_t total_out;
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} Context;
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/* Parse up to 5 decimal digits. */
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static BROTLI_BOOL ParseInt(const char* s, int low, int high, int* result) {
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int value = 0;
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int i;
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for (i = 0; i < 5; ++i) {
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char c = s[i];
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if (c == 0) break;
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if (s[i] < '0' || s[i] > '9') return BROTLI_FALSE;
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value = (10 * value) + (c - '0');
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}
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if (i == 0) return BROTLI_FALSE;
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if (i > 1 && s[0] == '0') return BROTLI_FALSE;
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if (s[i] != 0) return BROTLI_FALSE;
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if (value < low || value > high) return BROTLI_FALSE;
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*result = value;
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return BROTLI_TRUE;
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}
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/* Returns "base file name" or its tail, if it contains '/' or '\'. */
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static const char* FileName(const char* path) {
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const char* separator_position = strrchr(path, '/');
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if (separator_position) path = separator_position + 1;
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separator_position = strrchr(path, '\\');
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if (separator_position) path = separator_position + 1;
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return path;
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}
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/* Detect if the program name is a special alias that infers a command type. */
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static Command ParseAlias(const char* name) {
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/* TODO: cast name to lower case? */
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const char* unbrotli = "unbrotli";
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size_t unbrotli_len = strlen(unbrotli);
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name = FileName(name);
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/* Partial comparison. On Windows there could be ".exe" suffix. */
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if (strncmp(name, unbrotli, unbrotli_len) == 0) {
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char terminator = name[unbrotli_len];
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if (terminator == 0 || terminator == '.') return COMMAND_DECOMPRESS;
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}
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return COMMAND_COMPRESS;
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}
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static Command ParseParams(Context* params) {
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int argc = params->argc;
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char** argv = params->argv;
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int i;
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int next_option_index = 0;
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size_t input_count = 0;
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size_t longest_path_len = 1;
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BROTLI_BOOL command_set = BROTLI_FALSE;
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BROTLI_BOOL quality_set = BROTLI_FALSE;
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BROTLI_BOOL output_set = BROTLI_FALSE;
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BROTLI_BOOL keep_set = BROTLI_FALSE;
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BROTLI_BOOL lgwin_set = BROTLI_FALSE;
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BROTLI_BOOL suffix_set = BROTLI_FALSE;
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BROTLI_BOOL after_dash_dash = BROTLI_FALSE;
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Command command = ParseAlias(argv[0]);
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for (i = 1; i < argc; ++i) {
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const char* arg = argv[i];
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/* C99 5.1.2.2.1: "members argv[0] through argv[argc-1] inclusive shall
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contain pointers to strings"; NULL and 0-length are not forbidden. */
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size_t arg_len = arg ? strlen(arg) : 0;
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if (arg_len == 0) {
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params->not_input_indices[next_option_index++] = i;
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continue;
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}
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/* Too many options. The expected longest option list is:
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"-q 0 -w 10 -o f -D d -S b -d -f -k -n -v --", i.e. 16 items in total.
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This check is an additional guard that is never triggered, but provides
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a guard for future changes. */
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if (next_option_index > (MAX_OPTIONS - 2)) {
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fprintf(stderr, "too many options passed\n");
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return COMMAND_INVALID;
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}
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/* Input file entry. */
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if (after_dash_dash || arg[0] != '-' || arg_len == 1) {
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input_count++;
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if (longest_path_len < arg_len) longest_path_len = arg_len;
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continue;
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}
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/* Not a file entry. */
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params->not_input_indices[next_option_index++] = i;
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/* '--' entry stop parsing arguments. */
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if (arg_len == 2 && arg[1] == '-') {
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after_dash_dash = BROTLI_TRUE;
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continue;
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}
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/* Simple / coalesced options. */
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if (arg[1] != '-') {
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size_t j;
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for (j = 1; j < arg_len; ++j) {
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char c = arg[j];
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if (c >= '0' && c <= '9') {
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if (quality_set) {
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fprintf(stderr, "quality already set\n");
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return COMMAND_INVALID;
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}
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quality_set = BROTLI_TRUE;
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params->quality = c - '0';
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continue;
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} else if (c == 'c') {
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if (output_set) {
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fprintf(stderr, "write to standard output already set\n");
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return COMMAND_INVALID;
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}
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output_set = BROTLI_TRUE;
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params->write_to_stdout = BROTLI_TRUE;
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continue;
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} else if (c == 'd') {
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if (command_set) {
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fprintf(stderr, "command already set when parsing -d\n");
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return COMMAND_INVALID;
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}
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command_set = BROTLI_TRUE;
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command = COMMAND_DECOMPRESS;
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continue;
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} else if (c == 'f') {
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if (params->force_overwrite) {
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fprintf(stderr, "force output overwrite already set\n");
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return COMMAND_INVALID;
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}
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params->force_overwrite = BROTLI_TRUE;
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continue;
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} else if (c == 'h') {
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/* Don't parse further. */
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return COMMAND_HELP;
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} else if (c == 'j' || c == 'k') {
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if (keep_set) {
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fprintf(stderr, "argument --rm / -j or --keep / -k already set\n");
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return COMMAND_INVALID;
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}
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keep_set = BROTLI_TRUE;
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params->junk_source = TO_BROTLI_BOOL(c == 'j');
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continue;
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} else if (c == 'n') {
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if (!params->copy_stat) {
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fprintf(stderr, "argument --no-copy-stat / -n already set\n");
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return COMMAND_INVALID;
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}
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params->copy_stat = BROTLI_FALSE;
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continue;
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} else if (c == 't') {
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if (command_set) {
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fprintf(stderr, "command already set when parsing -t\n");
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return COMMAND_INVALID;
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}
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command_set = BROTLI_TRUE;
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command = COMMAND_TEST_INTEGRITY;
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continue;
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} else if (c == 'v') {
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if (params->verbosity > 0) {
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fprintf(stderr, "argument --verbose / -v already set\n");
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return COMMAND_INVALID;
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}
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params->verbosity = 1;
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continue;
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} else if (c == 'V') {
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/* Don't parse further. */
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return COMMAND_VERSION;
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} else if (c == 'Z') {
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if (quality_set) {
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fprintf(stderr, "quality already set\n");
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return COMMAND_INVALID;
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}
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quality_set = BROTLI_TRUE;
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params->quality = 11;
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continue;
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}
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/* o/q/w/D/S with parameter is expected */
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if (c != 'o' && c != 'q' && c != 'w' && c != 'D' && c != 'S') {
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fprintf(stderr, "invalid argument -%c\n", c);
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return COMMAND_INVALID;
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}
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if (j + 1 != arg_len) {
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fprintf(stderr, "expected parameter for argument -%c\n", c);
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return COMMAND_INVALID;
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}
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i++;
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if (i == argc || !argv[i] || argv[i][0] == 0) {
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fprintf(stderr, "expected parameter for argument -%c\n", c);
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return COMMAND_INVALID;
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}
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params->not_input_indices[next_option_index++] = i;
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if (c == 'o') {
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if (output_set) {
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fprintf(stderr, "write to standard output already set (-o)\n");
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return COMMAND_INVALID;
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}
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params->output_path = argv[i];
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} else if (c == 'q') {
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if (quality_set) {
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fprintf(stderr, "quality already set\n");
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return COMMAND_INVALID;
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}
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quality_set = ParseInt(argv[i], BROTLI_MIN_QUALITY,
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BROTLI_MAX_QUALITY, ¶ms->quality);
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if (!quality_set) {
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fprintf(stderr, "error parsing quality value [%s]\n", argv[i]);
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return COMMAND_INVALID;
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}
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} else if (c == 'w') {
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if (lgwin_set) {
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fprintf(stderr, "lgwin parameter already set\n");
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return COMMAND_INVALID;
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}
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lgwin_set = ParseInt(argv[i], 0,
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BROTLI_MAX_WINDOW_BITS, ¶ms->lgwin);
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if (!lgwin_set) {
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fprintf(stderr, "error parsing lgwin value [%s]\n", argv[i]);
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return COMMAND_INVALID;
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}
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if (params->lgwin != 0 && params->lgwin < BROTLI_MIN_WINDOW_BITS) {
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fprintf(stderr,
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"lgwin parameter (%d) smaller than the minimum (%d)\n",
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params->lgwin, BROTLI_MIN_WINDOW_BITS);
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return COMMAND_INVALID;
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}
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} else if (c == 'S') {
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if (suffix_set) {
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fprintf(stderr, "suffix already set\n");
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return COMMAND_INVALID;
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}
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suffix_set = BROTLI_TRUE;
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params->suffix = argv[i];
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}
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}
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} else { /* Double-dash. */
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arg = &arg[2];
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if (strcmp("best", arg) == 0) {
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if (quality_set) {
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fprintf(stderr, "quality already set\n");
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return COMMAND_INVALID;
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}
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quality_set = BROTLI_TRUE;
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params->quality = 11;
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} else if (strcmp("decompress", arg) == 0) {
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if (command_set) {
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fprintf(stderr, "command already set when parsing --decompress\n");
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return COMMAND_INVALID;
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}
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command_set = BROTLI_TRUE;
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command = COMMAND_DECOMPRESS;
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} else if (strcmp("force", arg) == 0) {
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if (params->force_overwrite) {
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fprintf(stderr, "force output overwrite already set\n");
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return COMMAND_INVALID;
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}
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params->force_overwrite = BROTLI_TRUE;
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} else if (strcmp("help", arg) == 0) {
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/* Don't parse further. */
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return COMMAND_HELP;
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} else if (strcmp("keep", arg) == 0) {
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if (keep_set) {
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fprintf(stderr, "argument --rm / -j or --keep / -k already set\n");
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return COMMAND_INVALID;
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}
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keep_set = BROTLI_TRUE;
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params->junk_source = BROTLI_FALSE;
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} else if (strcmp("no-copy-stat", arg) == 0) {
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if (!params->copy_stat) {
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fprintf(stderr, "argument --no-copy-stat / -n already set\n");
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return COMMAND_INVALID;
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}
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params->copy_stat = BROTLI_FALSE;
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} else if (strcmp("rm", arg) == 0) {
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if (keep_set) {
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fprintf(stderr, "argument --rm / -j or --keep / -k already set\n");
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return COMMAND_INVALID;
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}
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keep_set = BROTLI_TRUE;
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params->junk_source = BROTLI_TRUE;
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} else if (strcmp("stdout", arg) == 0) {
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if (output_set) {
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fprintf(stderr, "write to standard output already set\n");
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return COMMAND_INVALID;
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}
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output_set = BROTLI_TRUE;
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params->write_to_stdout = BROTLI_TRUE;
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} else if (strcmp("test", arg) == 0) {
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if (command_set) {
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fprintf(stderr, "command already set when parsing --test\n");
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return COMMAND_INVALID;
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}
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command_set = BROTLI_TRUE;
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command = COMMAND_TEST_INTEGRITY;
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} else if (strcmp("verbose", arg) == 0) {
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if (params->verbosity > 0) {
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fprintf(stderr, "argument --verbose / -v already set\n");
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return COMMAND_INVALID;
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}
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params->verbosity = 1;
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} else if (strcmp("version", arg) == 0) {
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/* Don't parse further. */
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return COMMAND_VERSION;
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} else {
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/* key=value */
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const char* value = strrchr(arg, '=');
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size_t key_len;
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if (!value || value[1] == 0) {
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fprintf(stderr, "must pass the parameter as --%s=value\n", arg);
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return COMMAND_INVALID;
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}
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key_len = (size_t)(value - arg);
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value++;
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if (strncmp("lgwin", arg, key_len) == 0) {
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if (lgwin_set) {
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fprintf(stderr, "lgwin parameter already set\n");
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return COMMAND_INVALID;
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}
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lgwin_set = ParseInt(value, 0,
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BROTLI_MAX_WINDOW_BITS, ¶ms->lgwin);
|
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if (!lgwin_set) {
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fprintf(stderr, "error parsing lgwin value [%s]\n", value);
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return COMMAND_INVALID;
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}
|
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if (params->lgwin != 0 && params->lgwin < BROTLI_MIN_WINDOW_BITS) {
|
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fprintf(stderr,
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"lgwin parameter (%d) smaller than the minimum (%d)\n",
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params->lgwin, BROTLI_MIN_WINDOW_BITS);
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return COMMAND_INVALID;
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}
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} else if (strncmp("large_window", arg, key_len) == 0) {
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/* This option is intentionally not mentioned in help. */
|
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if (lgwin_set) {
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fprintf(stderr, "lgwin parameter already set\n");
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return COMMAND_INVALID;
|
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}
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lgwin_set = ParseInt(value, 0,
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BROTLI_LARGE_MAX_WINDOW_BITS, ¶ms->lgwin);
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if (!lgwin_set) {
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fprintf(stderr, "error parsing lgwin value [%s]\n", value);
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return COMMAND_INVALID;
|
|
}
|
|
if (params->lgwin != 0 && params->lgwin < BROTLI_MIN_WINDOW_BITS) {
|
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fprintf(stderr,
|
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"lgwin parameter (%d) smaller than the minimum (%d)\n",
|
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params->lgwin, BROTLI_MIN_WINDOW_BITS);
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return COMMAND_INVALID;
|
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}
|
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} else if (strncmp("output", arg, key_len) == 0) {
|
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if (output_set) {
|
|
fprintf(stderr,
|
|
"write to standard output already set (--output)\n");
|
|
return COMMAND_INVALID;
|
|
}
|
|
params->output_path = value;
|
|
} else if (strncmp("quality", arg, key_len) == 0) {
|
|
if (quality_set) {
|
|
fprintf(stderr, "quality already set\n");
|
|
return COMMAND_INVALID;
|
|
}
|
|
quality_set = ParseInt(value, BROTLI_MIN_QUALITY,
|
|
BROTLI_MAX_QUALITY, ¶ms->quality);
|
|
if (!quality_set) {
|
|
fprintf(stderr, "error parsing quality value [%s]\n", value);
|
|
return COMMAND_INVALID;
|
|
}
|
|
} else if (strncmp("suffix", arg, key_len) == 0) {
|
|
if (suffix_set) {
|
|
fprintf(stderr, "suffix already set\n");
|
|
return COMMAND_INVALID;
|
|
}
|
|
suffix_set = BROTLI_TRUE;
|
|
params->suffix = value;
|
|
} else {
|
|
fprintf(stderr, "invalid parameter: [%s]\n", arg);
|
|
return COMMAND_INVALID;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
params->input_count = input_count;
|
|
params->longest_path_len = longest_path_len;
|
|
params->decompress = (command == COMMAND_DECOMPRESS);
|
|
params->test_integrity = (command == COMMAND_TEST_INTEGRITY);
|
|
|
|
if (input_count > 1 && output_set) return COMMAND_INVALID;
|
|
if (params->test_integrity) {
|
|
if (params->output_path) return COMMAND_INVALID;
|
|
if (params->write_to_stdout) return COMMAND_INVALID;
|
|
}
|
|
if (strchr(params->suffix, '/') || strchr(params->suffix, '\\')) {
|
|
return COMMAND_INVALID;
|
|
}
|
|
|
|
return command;
|
|
}
|
|
|
|
static void PrintVersion(void) {
|
|
int major = BROTLI_VERSION >> 24;
|
|
int minor = (BROTLI_VERSION >> 12) & 0xFFF;
|
|
int patch = BROTLI_VERSION & 0xFFF;
|
|
fprintf(stdout, "brotli %d.%d.%d\n", major, minor, patch);
|
|
}
|
|
|
|
static void PrintHelp(const char* name, BROTLI_BOOL error) {
|
|
FILE* media = error ? stderr : stdout;
|
|
/* String is cut to pieces with length less than 509, to conform C90 spec. */
|
|
fprintf(media,
|
|
"Usage: %s [OPTION]... [FILE]...\n",
|
|
name);
|
|
fprintf(media,
|
|
"Options:\n"
|
|
" -# compression level (0-9)\n"
|
|
" -c, --stdout write on standard output\n"
|
|
" -d, --decompress decompress\n"
|
|
" -f, --force force output file overwrite\n"
|
|
" -h, --help display this help and exit\n");
|
|
fprintf(media,
|
|
" -j, --rm remove source file(s)\n"
|
|
" -k, --keep keep source file(s) (default)\n"
|
|
" -n, --no-copy-stat do not copy source file(s) attributes\n"
|
|
" -o FILE, --output=FILE output file (only if 1 input file)\n");
|
|
fprintf(media,
|
|
" -q NUM, --quality=NUM compression level (%d-%d)\n",
|
|
BROTLI_MIN_QUALITY, BROTLI_MAX_QUALITY);
|
|
fprintf(media,
|
|
" -t, --test test compressed file integrity\n"
|
|
" -v, --verbose verbose mode\n");
|
|
fprintf(media,
|
|
" -w NUM, --lgwin=NUM set LZ77 window size (0, %d-%d)\n"
|
|
" window size = 2**NUM - 16\n"
|
|
" 0 lets compressor choose the optimal value\n",
|
|
BROTLI_MIN_WINDOW_BITS, BROTLI_MAX_WINDOW_BITS);
|
|
fprintf(media,
|
|
" --large_window=NUM use incompatible large-window brotli\n"
|
|
" bitstream with window size (0, %d-%d)\n"
|
|
" WARNING: this format is not compatible\n"
|
|
" with brotli RFC 7932 and may not be\n"
|
|
" decodable with regular brotli decoders\n",
|
|
BROTLI_MIN_WINDOW_BITS, BROTLI_LARGE_MAX_WINDOW_BITS);
|
|
fprintf(media,
|
|
" -S SUF, --suffix=SUF output file suffix (default:'%s')\n",
|
|
DEFAULT_SUFFIX);
|
|
fprintf(media,
|
|
" -V, --version display version and exit\n"
|
|
" -Z, --best use best compression level (11) (default)\n"
|
|
"Simple options could be coalesced, i.e. '-9kf' is equivalent to '-9 -k -f'.\n"
|
|
"With no FILE, or when FILE is -, read standard input.\n"
|
|
"All arguments after '--' are treated as files.\n");
|
|
}
|
|
|
|
static const char* PrintablePath(const char* path) {
|
|
return path ? path : "con";
|
|
}
|
|
|
|
static BROTLI_BOOL OpenInputFile(const char* input_path, FILE** f) {
|
|
*f = NULL;
|
|
if (!input_path) {
|
|
*f = fdopen(MAKE_BINARY(STDIN_FILENO), "rb");
|
|
return BROTLI_TRUE;
|
|
}
|
|
*f = fopen(input_path, "rb");
|
|
if (!*f) {
|
|
fprintf(stderr, "failed to open input file [%s]: %s\n",
|
|
PrintablePath(input_path), strerror(errno));
|
|
return BROTLI_FALSE;
|
|
}
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
static BROTLI_BOOL OpenOutputFile(const char* output_path, FILE** f,
|
|
BROTLI_BOOL force) {
|
|
int fd;
|
|
*f = NULL;
|
|
if (!output_path) {
|
|
*f = fdopen(MAKE_BINARY(STDOUT_FILENO), "wb");
|
|
return BROTLI_TRUE;
|
|
}
|
|
fd = open(output_path, O_CREAT | (force ? 0 : O_EXCL) | O_WRONLY | O_TRUNC,
|
|
S_IRUSR | S_IWUSR);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "failed to open output file [%s]: %s\n",
|
|
PrintablePath(output_path), strerror(errno));
|
|
return BROTLI_FALSE;
|
|
}
|
|
*f = fdopen(fd, "wb");
|
|
if (!*f) {
|
|
fprintf(stderr, "failed to open output file [%s]: %s\n",
|
|
PrintablePath(output_path), strerror(errno));
|
|
return BROTLI_FALSE;
|
|
}
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
static int64_t FileSize(const char* path) {
|
|
FILE* f = fopen(path, "rb");
|
|
int64_t retval;
|
|
if (f == NULL) {
|
|
return -1;
|
|
}
|
|
if (fseek(f, 0L, SEEK_END) != 0) {
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
retval = ftell(f);
|
|
if (fclose(f) != 0) {
|
|
return -1;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/* Copy file times and permissions.
|
|
TODO: this is a "best effort" implementation; honest cross-platform
|
|
fully featured implementation is way too hacky; add more hacks by request. */
|
|
static void CopyStat(const char* input_path, const char* output_path) {
|
|
struct stat statbuf;
|
|
struct utimbuf times;
|
|
int res;
|
|
if (input_path == 0 || output_path == 0) {
|
|
return;
|
|
}
|
|
if (stat(input_path, &statbuf) != 0) {
|
|
return;
|
|
}
|
|
times.actime = statbuf.st_atime;
|
|
times.modtime = statbuf.st_mtime;
|
|
utime(output_path, ×);
|
|
res = chmod(output_path, statbuf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO));
|
|
if (res != 0) {
|
|
fprintf(stderr, "setting access bits failed for [%s]: %s\n",
|
|
PrintablePath(output_path), strerror(errno));
|
|
}
|
|
res = chown(output_path, (uid_t)-1, statbuf.st_gid);
|
|
if (res != 0) {
|
|
fprintf(stderr, "setting group failed for [%s]: %s\n",
|
|
PrintablePath(output_path), strerror(errno));
|
|
}
|
|
res = chown(output_path, statbuf.st_uid, (gid_t)-1);
|
|
if (res != 0) {
|
|
fprintf(stderr, "setting user failed for [%s]: %s\n",
|
|
PrintablePath(output_path), strerror(errno));
|
|
}
|
|
}
|
|
|
|
static BROTLI_BOOL NextFile(Context* context) {
|
|
const char* arg;
|
|
size_t arg_len;
|
|
|
|
/* Iterator points to last used arg; increment to search for the next one. */
|
|
context->iterator++;
|
|
|
|
context->input_file_length = -1;
|
|
|
|
/* No input path; read from console. */
|
|
if (context->input_count == 0) {
|
|
if (context->iterator > 1) return BROTLI_FALSE;
|
|
context->current_input_path = NULL;
|
|
/* Either write to the specified path, or to console. */
|
|
context->current_output_path = context->output_path;
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
/* Skip option arguments. */
|
|
while (context->iterator == context->not_input_indices[context->ignore]) {
|
|
context->iterator++;
|
|
context->ignore++;
|
|
}
|
|
|
|
/* All args are scanned already. */
|
|
if (context->iterator >= context->argc) return BROTLI_FALSE;
|
|
|
|
/* Iterator now points to the input file name. */
|
|
arg = context->argv[context->iterator];
|
|
arg_len = strlen(arg);
|
|
/* Read from console. */
|
|
if (arg_len == 1 && arg[0] == '-') {
|
|
context->current_input_path = NULL;
|
|
context->current_output_path = context->output_path;
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
context->current_input_path = arg;
|
|
context->input_file_length = FileSize(arg);
|
|
context->current_output_path = context->output_path;
|
|
|
|
if (context->output_path) return BROTLI_TRUE;
|
|
if (context->write_to_stdout) return BROTLI_TRUE;
|
|
|
|
strcpy(context->modified_path, arg);
|
|
context->current_output_path = context->modified_path;
|
|
/* If output is not specified, input path suffix should match. */
|
|
if (context->decompress) {
|
|
size_t suffix_len = strlen(context->suffix);
|
|
char* name = (char*)FileName(context->modified_path);
|
|
char* name_suffix;
|
|
size_t name_len = strlen(name);
|
|
if (name_len < suffix_len + 1) {
|
|
fprintf(stderr, "empty output file name for [%s] input file\n",
|
|
PrintablePath(arg));
|
|
context->iterator_error = BROTLI_TRUE;
|
|
return BROTLI_FALSE;
|
|
}
|
|
name_suffix = name + name_len - suffix_len;
|
|
if (strcmp(context->suffix, name_suffix) != 0) {
|
|
fprintf(stderr, "input file [%s] suffix mismatch\n",
|
|
PrintablePath(arg));
|
|
context->iterator_error = BROTLI_TRUE;
|
|
return BROTLI_FALSE;
|
|
}
|
|
name_suffix[0] = 0;
|
|
return BROTLI_TRUE;
|
|
} else {
|
|
strcpy(context->modified_path + arg_len, context->suffix);
|
|
return BROTLI_TRUE;
|
|
}
|
|
}
|
|
|
|
static BROTLI_BOOL OpenFiles(Context* context) {
|
|
BROTLI_BOOL is_ok = OpenInputFile(context->current_input_path, &context->fin);
|
|
if (!context->test_integrity && is_ok) {
|
|
is_ok = OpenOutputFile(
|
|
context->current_output_path, &context->fout, context->force_overwrite);
|
|
}
|
|
return is_ok;
|
|
}
|
|
|
|
static BROTLI_BOOL CloseFiles(Context* context, BROTLI_BOOL success) {
|
|
BROTLI_BOOL is_ok = BROTLI_TRUE;
|
|
if (!context->test_integrity && context->fout) {
|
|
if (!success && context->current_output_path) {
|
|
unlink(context->current_output_path);
|
|
}
|
|
if (fclose(context->fout) != 0) {
|
|
if (success) {
|
|
fprintf(stderr, "fclose failed [%s]: %s\n",
|
|
PrintablePath(context->current_output_path), strerror(errno));
|
|
}
|
|
is_ok = BROTLI_FALSE;
|
|
}
|
|
|
|
/* TOCTOU violation, but otherwise it is impossible to set file times. */
|
|
if (success && is_ok && context->copy_stat) {
|
|
CopyStat(context->current_input_path, context->current_output_path);
|
|
}
|
|
}
|
|
|
|
if (context->fin) {
|
|
if (fclose(context->fin) != 0) {
|
|
if (is_ok) {
|
|
fprintf(stderr, "fclose failed [%s]: %s\n",
|
|
PrintablePath(context->current_input_path), strerror(errno));
|
|
}
|
|
is_ok = BROTLI_FALSE;
|
|
}
|
|
}
|
|
if (success && context->junk_source && context->current_input_path) {
|
|
unlink(context->current_input_path);
|
|
}
|
|
|
|
context->fin = NULL;
|
|
context->fout = NULL;
|
|
|
|
return is_ok;
|
|
}
|
|
|
|
static const size_t kFileBufferSize = 1 << 19;
|
|
|
|
static void InitializeBuffers(Context* context) {
|
|
context->available_in = 0;
|
|
context->next_in = NULL;
|
|
context->available_out = kFileBufferSize;
|
|
context->next_out = context->output;
|
|
context->total_in = 0;
|
|
context->total_out = 0;
|
|
}
|
|
|
|
/* This method might give the false-negative result.
|
|
However, after an empty / incomplete read it should tell the truth. */
|
|
static BROTLI_BOOL HasMoreInput(Context* context) {
|
|
return feof(context->fin) ? BROTLI_FALSE : BROTLI_TRUE;
|
|
}
|
|
|
|
static BROTLI_BOOL ProvideInput(Context* context) {
|
|
context->available_in =
|
|
fread(context->input, 1, kFileBufferSize, context->fin);
|
|
context->total_in += context->available_in;
|
|
context->next_in = context->input;
|
|
if (ferror(context->fin)) {
|
|
fprintf(stderr, "failed to read input [%s]: %s\n",
|
|
PrintablePath(context->current_input_path), strerror(errno));
|
|
return BROTLI_FALSE;
|
|
}
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
/* Internal: should be used only in Provide-/Flush-Output. */
|
|
static BROTLI_BOOL WriteOutput(Context* context) {
|
|
size_t out_size = (size_t)(context->next_out - context->output);
|
|
context->total_out += out_size;
|
|
if (out_size == 0) return BROTLI_TRUE;
|
|
if (context->test_integrity) return BROTLI_TRUE;
|
|
|
|
fwrite(context->output, 1, out_size, context->fout);
|
|
if (ferror(context->fout)) {
|
|
fprintf(stderr, "failed to write output [%s]: %s\n",
|
|
PrintablePath(context->current_output_path), strerror(errno));
|
|
return BROTLI_FALSE;
|
|
}
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
static BROTLI_BOOL ProvideOutput(Context* context) {
|
|
if (!WriteOutput(context)) return BROTLI_FALSE;
|
|
context->available_out = kFileBufferSize;
|
|
context->next_out = context->output;
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
static BROTLI_BOOL FlushOutput(Context* context) {
|
|
if (!WriteOutput(context)) return BROTLI_FALSE;
|
|
context->available_out = 0;
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
static void PrintBytes(size_t value) {
|
|
if (value < 1024) {
|
|
fprintf(stderr, "%d B", (int)value);
|
|
} else if (value < 1048576) {
|
|
fprintf(stderr, "%0.3f KiB", (double)value / 1024.0);
|
|
} else if (value < 1073741824) {
|
|
fprintf(stderr, "%0.3f MiB", (double)value / 1048576.0);
|
|
} else {
|
|
fprintf(stderr, "%0.3f GiB", (double)value / 1073741824.0);
|
|
}
|
|
}
|
|
|
|
static void PrintFileProcessingProgress(Context* context) {
|
|
fprintf(stderr, "[%s]: ", PrintablePath(context->current_input_path));
|
|
PrintBytes(context->total_in);
|
|
fprintf(stderr, " -> ");
|
|
PrintBytes(context->total_out);
|
|
}
|
|
|
|
static BROTLI_BOOL DecompressFile(Context* context, BrotliDecoderState* s) {
|
|
BrotliDecoderResult result = BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT;
|
|
InitializeBuffers(context);
|
|
for (;;) {
|
|
if (result == BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT) {
|
|
if (!HasMoreInput(context)) {
|
|
fprintf(stderr, "corrupt input [%s]\n",
|
|
PrintablePath(context->current_input_path));
|
|
return BROTLI_FALSE;
|
|
}
|
|
if (!ProvideInput(context)) return BROTLI_FALSE;
|
|
} else if (result == BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT) {
|
|
if (!ProvideOutput(context)) return BROTLI_FALSE;
|
|
} else if (result == BROTLI_DECODER_RESULT_SUCCESS) {
|
|
if (!FlushOutput(context)) return BROTLI_FALSE;
|
|
int has_more_input =
|
|
(context->available_in != 0) || (fgetc(context->fin) != EOF);
|
|
if (has_more_input) {
|
|
fprintf(stderr, "corrupt input [%s]\n",
|
|
PrintablePath(context->current_input_path));
|
|
return BROTLI_FALSE;
|
|
}
|
|
if (context->verbosity > 0) {
|
|
fprintf(stderr, "Decompressed ");
|
|
PrintFileProcessingProgress(context);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
return BROTLI_TRUE;
|
|
} else {
|
|
fprintf(stderr, "corrupt input [%s]\n",
|
|
PrintablePath(context->current_input_path));
|
|
return BROTLI_FALSE;
|
|
}
|
|
|
|
result = BrotliDecoderDecompressStream(s, &context->available_in,
|
|
&context->next_in, &context->available_out, &context->next_out, 0);
|
|
}
|
|
}
|
|
|
|
static BROTLI_BOOL DecompressFiles(Context* context) {
|
|
while (NextFile(context)) {
|
|
BROTLI_BOOL is_ok = BROTLI_TRUE;
|
|
BrotliDecoderState* s = BrotliDecoderCreateInstance(NULL, NULL, NULL);
|
|
if (!s) {
|
|
fprintf(stderr, "out of memory\n");
|
|
return BROTLI_FALSE;
|
|
}
|
|
/* This allows decoding "large-window" streams. Though it creates
|
|
fragmentation (new builds decode streams that old builds don't),
|
|
it is better from used experience perspective. */
|
|
BrotliDecoderSetParameter(s, BROTLI_DECODER_PARAM_LARGE_WINDOW, 1u);
|
|
is_ok = OpenFiles(context);
|
|
if (is_ok && !context->current_input_path &&
|
|
!context->force_overwrite && isatty(STDIN_FILENO)) {
|
|
fprintf(stderr, "Use -h help. Use -f to force input from a terminal.\n");
|
|
is_ok = BROTLI_FALSE;
|
|
}
|
|
if (is_ok) is_ok = DecompressFile(context, s);
|
|
BrotliDecoderDestroyInstance(s);
|
|
if (!CloseFiles(context, is_ok)) is_ok = BROTLI_FALSE;
|
|
if (!is_ok) return BROTLI_FALSE;
|
|
}
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
static BROTLI_BOOL CompressFile(Context* context, BrotliEncoderState* s) {
|
|
BROTLI_BOOL is_eof = BROTLI_FALSE;
|
|
InitializeBuffers(context);
|
|
for (;;) {
|
|
if (context->available_in == 0 && !is_eof) {
|
|
if (!ProvideInput(context)) return BROTLI_FALSE;
|
|
is_eof = !HasMoreInput(context);
|
|
}
|
|
|
|
if (!BrotliEncoderCompressStream(s,
|
|
is_eof ? BROTLI_OPERATION_FINISH : BROTLI_OPERATION_PROCESS,
|
|
&context->available_in, &context->next_in,
|
|
&context->available_out, &context->next_out, NULL)) {
|
|
/* Should detect OOM? */
|
|
fprintf(stderr, "failed to compress data [%s]\n",
|
|
PrintablePath(context->current_input_path));
|
|
return BROTLI_FALSE;
|
|
}
|
|
|
|
if (context->available_out == 0) {
|
|
if (!ProvideOutput(context)) return BROTLI_FALSE;
|
|
}
|
|
|
|
if (BrotliEncoderIsFinished(s)) {
|
|
if (!FlushOutput(context)) return BROTLI_FALSE;
|
|
if (context->verbosity > 0) {
|
|
fprintf(stderr, "Compressed ");
|
|
PrintFileProcessingProgress(context);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
return BROTLI_TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static BROTLI_BOOL CompressFiles(Context* context) {
|
|
while (NextFile(context)) {
|
|
BROTLI_BOOL is_ok = BROTLI_TRUE;
|
|
BrotliEncoderState* s = BrotliEncoderCreateInstance(NULL, NULL, NULL);
|
|
if (!s) {
|
|
fprintf(stderr, "out of memory\n");
|
|
return BROTLI_FALSE;
|
|
}
|
|
BrotliEncoderSetParameter(s,
|
|
BROTLI_PARAM_QUALITY, (uint32_t)context->quality);
|
|
if (context->lgwin > 0) {
|
|
/* Specified by user. */
|
|
/* Do not enable "large-window" extension, if not required. */
|
|
if (context->lgwin > BROTLI_MAX_WINDOW_BITS) {
|
|
BrotliEncoderSetParameter(s, BROTLI_PARAM_LARGE_WINDOW, 1u);
|
|
}
|
|
BrotliEncoderSetParameter(s,
|
|
BROTLI_PARAM_LGWIN, (uint32_t)context->lgwin);
|
|
} else {
|
|
/* 0, or not specified by user; could be chosen by compressor. */
|
|
uint32_t lgwin = DEFAULT_LGWIN;
|
|
/* Use file size to limit lgwin. */
|
|
if (context->input_file_length >= 0) {
|
|
lgwin = BROTLI_MIN_WINDOW_BITS;
|
|
while (BROTLI_MAX_BACKWARD_LIMIT(lgwin) <
|
|
(uint64_t)context->input_file_length) {
|
|
lgwin++;
|
|
if (lgwin == BROTLI_MAX_WINDOW_BITS) break;
|
|
}
|
|
}
|
|
BrotliEncoderSetParameter(s, BROTLI_PARAM_LGWIN, lgwin);
|
|
}
|
|
if (context->input_file_length > 0) {
|
|
uint32_t size_hint = context->input_file_length < (1 << 30) ?
|
|
(uint32_t)context->input_file_length : (1u << 30);
|
|
BrotliEncoderSetParameter(s, BROTLI_PARAM_SIZE_HINT, size_hint);
|
|
}
|
|
is_ok = OpenFiles(context);
|
|
if (is_ok && !context->current_output_path &&
|
|
!context->force_overwrite && isatty(STDOUT_FILENO)) {
|
|
fprintf(stderr, "Use -h help. Use -f to force output to a terminal.\n");
|
|
is_ok = BROTLI_FALSE;
|
|
}
|
|
if (is_ok) is_ok = CompressFile(context, s);
|
|
BrotliEncoderDestroyInstance(s);
|
|
if (!CloseFiles(context, is_ok)) is_ok = BROTLI_FALSE;
|
|
if (!is_ok) return BROTLI_FALSE;
|
|
}
|
|
return BROTLI_TRUE;
|
|
}
|
|
|
|
int main(int argc, char** argv) {
|
|
Command command;
|
|
Context context;
|
|
BROTLI_BOOL is_ok = BROTLI_TRUE;
|
|
int i;
|
|
|
|
context.quality = 11;
|
|
context.lgwin = -1;
|
|
context.verbosity = 0;
|
|
context.force_overwrite = BROTLI_FALSE;
|
|
context.junk_source = BROTLI_FALSE;
|
|
context.copy_stat = BROTLI_TRUE;
|
|
context.test_integrity = BROTLI_FALSE;
|
|
context.write_to_stdout = BROTLI_FALSE;
|
|
context.decompress = BROTLI_FALSE;
|
|
context.large_window = BROTLI_FALSE;
|
|
context.output_path = NULL;
|
|
context.suffix = DEFAULT_SUFFIX;
|
|
for (i = 0; i < MAX_OPTIONS; ++i) context.not_input_indices[i] = 0;
|
|
context.longest_path_len = 1;
|
|
context.input_count = 0;
|
|
|
|
context.argc = argc;
|
|
context.argv = argv;
|
|
context.modified_path = NULL;
|
|
context.iterator = 0;
|
|
context.ignore = 0;
|
|
context.iterator_error = BROTLI_FALSE;
|
|
context.buffer = NULL;
|
|
context.current_input_path = NULL;
|
|
context.current_output_path = NULL;
|
|
context.fin = NULL;
|
|
context.fout = NULL;
|
|
|
|
command = ParseParams(&context);
|
|
|
|
if (command == COMMAND_COMPRESS || command == COMMAND_DECOMPRESS ||
|
|
command == COMMAND_TEST_INTEGRITY) {
|
|
if (is_ok) {
|
|
size_t modified_path_len =
|
|
context.longest_path_len + strlen(context.suffix) + 1;
|
|
context.modified_path = (char*)malloc(modified_path_len);
|
|
context.buffer = (uint8_t*)malloc(kFileBufferSize * 2);
|
|
if (!context.modified_path || !context.buffer) {
|
|
fprintf(stderr, "out of memory\n");
|
|
is_ok = BROTLI_FALSE;
|
|
} else {
|
|
context.input = context.buffer;
|
|
context.output = context.buffer + kFileBufferSize;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!is_ok) command = COMMAND_NOOP;
|
|
|
|
switch (command) {
|
|
case COMMAND_NOOP:
|
|
break;
|
|
|
|
case COMMAND_VERSION:
|
|
PrintVersion();
|
|
break;
|
|
|
|
case COMMAND_COMPRESS:
|
|
is_ok = CompressFiles(&context);
|
|
break;
|
|
|
|
case COMMAND_DECOMPRESS:
|
|
case COMMAND_TEST_INTEGRITY:
|
|
is_ok = DecompressFiles(&context);
|
|
break;
|
|
|
|
case COMMAND_HELP:
|
|
case COMMAND_INVALID:
|
|
default:
|
|
is_ok = (command == COMMAND_HELP);
|
|
PrintHelp(FileName(argv[0]), is_ok);
|
|
break;
|
|
}
|
|
|
|
if (context.iterator_error) is_ok = BROTLI_FALSE;
|
|
|
|
free(context.modified_path);
|
|
free(context.buffer);
|
|
|
|
if (!is_ok) exit(1);
|
|
return 0;
|
|
}
|