1 ///////////////////////////////////////////////////////////////////////////////
4 /// \brief Parser for filter-specific options
6 // Author: Lasse Collin
8 // This file has been put into the public domain.
9 // You can do whatever you want with this file.
11 ///////////////////////////////////////////////////////////////////////////////
28 const name_id_map *map;
34 /// Parses option=value pairs that are separated with colons, semicolons,
35 /// or commas: opt=val:opt=val;opt=val,opt=val
37 /// Each option is a string, that is converted to an integer using the
38 /// index where the option string is in the array.
41 /// - a string-id map mapping a list of possible string values to integers
42 /// (opts[i].map != NULL, opts[i].min and opts[i].max are ignored);
43 /// - a number with minimum and maximum value limit
44 /// (opts[i].map == NULL && opts[i].min != UINT64_MAX);
45 /// - a string that will be parsed by the filter-specific code
46 /// (opts[i].map == NULL && opts[i].min == UINT64_MAX, opts[i].max ignored)
48 /// When parsing both option and value succeed, a filter-specific function
49 /// is called, which should update the given value to filter-specific
50 /// options structure.
52 /// \param str String containing the options from the command line
53 /// \param opts Filter-specific option map
54 /// \param set Filter-specific function to update filter_options
55 /// \param filter_options Pointer to filter-specific options structure
57 /// \return Returns only if no errors occur.
60 parse_options(const char *str, const option_map *opts,
61 void (*set)(void *filter_options,
62 uint32_t key, uint64_t value, const char *valuestr),
65 if (str == NULL || str[0] == '\0')
68 char *s = xstrdup(str);
79 char *split = strchr(name, ',');
83 char *value = strchr(name, '=');
87 if (value == NULL || value[0] == '\0')
88 message_fatal(_("%s: Options must be `name=value' "
89 "pairs separated with commas"), str);
91 // Look for the option name from the option map.
93 for (size_t i = 0; opts[i].name != NULL; ++i) {
94 if (strcmp(name, opts[i].name) != 0)
97 if (opts[i].map != NULL) {
98 // value is a string which we should map
101 for (j = 0; opts[i].map[j].name != NULL; ++j) {
102 if (strcmp(opts[i].map[j].name, value)
107 if (opts[i].map[j].name == NULL)
108 message_fatal(_("%s: Invalid option "
111 set(filter_options, i, opts[i].map[j].id,
114 } else if (opts[i].min == UINT64_MAX) {
115 // value is a special string that will be
117 set(filter_options, i, 0, value);
120 // value is an integer.
121 const uint64_t v = str_to_uint64(name, value,
122 opts[i].min, opts[i].max);
123 set(filter_options, i, v, value);
131 message_fatal(_("%s: Invalid option name"), name);
156 set_subblock(void *options, uint32_t key, uint64_t value,
157 const char *valuestr lzma_attribute((unused)))
159 lzma_options_subblock *opt = options;
163 opt->subblock_data_size = value;
171 opt->alignment = value;
177 extern lzma_options_subblock *
178 options_subblock(const char *str)
180 static const option_map opts[] = {
181 { "size", NULL, LZMA_SUBBLOCK_DATA_SIZE_MIN,
182 LZMA_SUBBLOCK_DATA_SIZE_MAX },
183 { "rle", NULL, LZMA_SUBBLOCK_RLE_OFF,
184 LZMA_SUBBLOCK_RLE_MAX },
185 { "align",NULL, LZMA_SUBBLOCK_ALIGNMENT_MIN,
186 LZMA_SUBBLOCK_ALIGNMENT_MAX },
190 lzma_options_subblock *options
191 = xmalloc(sizeof(lzma_options_subblock));
192 *options = (lzma_options_subblock){
193 .allow_subfilters = false,
194 .alignment = LZMA_SUBBLOCK_ALIGNMENT_DEFAULT,
195 .subblock_data_size = LZMA_SUBBLOCK_DATA_SIZE_DEFAULT,
196 .rle = LZMA_SUBBLOCK_RLE_OFF,
199 parse_options(str, opts, &set_subblock, options);
215 set_delta(void *options, uint32_t key, uint64_t value,
216 const char *valuestr lzma_attribute((unused)))
218 lzma_options_delta *opt = options;
227 extern lzma_options_delta *
228 options_delta(const char *str)
230 static const option_map opts[] = {
231 { "dist", NULL, LZMA_DELTA_DIST_MIN,
232 LZMA_DELTA_DIST_MAX },
236 lzma_options_delta *options = xmalloc(sizeof(lzma_options_delta));
237 *options = (lzma_options_delta){
238 // It's hard to give a useful default for this.
239 .type = LZMA_DELTA_TYPE_BYTE,
240 .dist = LZMA_DELTA_DIST_MIN,
243 parse_options(str, opts, &set_delta, options);
259 set_bcj(void *options, uint32_t key, uint64_t value,
260 const char *valuestr lzma_attribute((unused)))
262 lzma_options_bcj *opt = options;
264 case OPT_START_OFFSET:
265 opt->start_offset = value;
271 extern lzma_options_bcj *
272 options_bcj(const char *str)
274 static const option_map opts[] = {
275 { "start", NULL, 0, UINT32_MAX },
279 lzma_options_bcj *options = xmalloc(sizeof(lzma_options_bcj));
280 *options = (lzma_options_bcj){
284 parse_options(str, opts, &set_bcj, options);
307 static void lzma_attribute((noreturn))
308 error_lzma_preset(const char *valuestr)
310 message_fatal(_("Unsupported LZMA1/LZMA2 preset: %s"), valuestr);
315 set_lzma(void *options, uint32_t key, uint64_t value, const char *valuestr)
317 lzma_options_lzma *opt = options;
321 if (valuestr[0] < '0' || valuestr[0] > '9')
322 error_lzma_preset(valuestr);
324 uint32_t preset = valuestr[0] - '0';
326 // Currently only "e" is supported as a modifier,
327 // so keep this simple for now.
328 if (valuestr[1] != '\0') {
329 if (valuestr[1] == 'e')
330 preset |= LZMA_PRESET_EXTREME;
332 error_lzma_preset(valuestr);
334 if (valuestr[2] != '\0')
335 error_lzma_preset(valuestr);
338 if (lzma_lzma_preset(options, preset))
339 error_lzma_preset(valuestr);
345 opt->dict_size = value;
365 opt->nice_len = value;
379 extern lzma_options_lzma *
380 options_lzma(const char *str)
382 static const name_id_map modes[] = {
383 { "fast", LZMA_MODE_FAST },
384 { "normal", LZMA_MODE_NORMAL },
388 static const name_id_map mfs[] = {
389 { "hc3", LZMA_MF_HC3 },
390 { "hc4", LZMA_MF_HC4 },
391 { "bt2", LZMA_MF_BT2 },
392 { "bt3", LZMA_MF_BT3 },
393 { "bt4", LZMA_MF_BT4 },
397 static const option_map opts[] = {
398 { "preset", NULL, UINT64_MAX, 0 },
399 { "dict", NULL, LZMA_DICT_SIZE_MIN,
400 (UINT32_C(1) << 30) + (UINT32_C(1) << 29) },
401 { "lc", NULL, LZMA_LCLP_MIN, LZMA_LCLP_MAX },
402 { "lp", NULL, LZMA_LCLP_MIN, LZMA_LCLP_MAX },
403 { "pb", NULL, LZMA_PB_MIN, LZMA_PB_MAX },
404 { "mode", modes, 0, 0 },
405 { "nice", NULL, 2, 273 },
407 { "depth", NULL, 0, UINT32_MAX },
411 lzma_options_lzma *options = xmalloc(sizeof(lzma_options_lzma));
412 *options = (lzma_options_lzma){
413 .dict_size = LZMA_DICT_SIZE_DEFAULT,
415 .preset_dict_size = 0,
416 .lc = LZMA_LC_DEFAULT,
417 .lp = LZMA_LP_DEFAULT,
418 .pb = LZMA_PB_DEFAULT,
420 .mode = LZMA_MODE_NORMAL,
426 parse_options(str, opts, &set_lzma, options);
428 if (options->lc + options->lp > LZMA_LCLP_MAX)
429 message_fatal(_("The sum of lc and lp must be at "
432 const uint32_t nice_len_min = options->mf & 0x0F;
433 if (options->nice_len < nice_len_min)
434 message_fatal(_("The selected match finder requires at "
435 "least nice=%" PRIu32), nice_len_min);