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librazor/razor.c
author Richard Hughes <richard@hughsie.com>
Mon Jun 30 08:51:26 2008 +0100 (2008-06-30)
changeset 302 9b71b537d175
parent 301 4124c37fd953
child 304 bf23ba00db03
permissions -rw-r--r--
convert razor_package_get_details() and razor_package_iterator_next() to varargs

The functions for getting package details about a package were limited to a few
things, when in the future we will want to support much more about a package.
The iterator was also limited to name,version,arch when most of the time we
didn't need all this data. 
     1 /*

     2  * Copyright (C) 2008  Kristian Høgsberg <krh@redhat.com>

     3  * Copyright (C) 2008  Red Hat, Inc

     4  *

     5  * This program is free software; you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation; either version 2 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License along

    16  * with this program; if not, write to the Free Software Foundation, Inc.,

    17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    18  */

    19 

    20 #define _GNU_SOURCE

    21 

    22 #include <stdlib.h>

    23 #include <stddef.h>

    24 #include <stdint.h>

    25 #include <stdio.h>

    26 #include <stdarg.h>

    27 #include <string.h>

    28 #include <sys/types.h>

    29 #include <sys/stat.h>

    30 #include <sys/mman.h>

    31 #include <unistd.h>

    32 #include <fcntl.h>

    33 #include <errno.h>

    34 #include <ctype.h>

    35 #include <fnmatch.h>

    36 #include <assert.h>

    37 

    38 #include "razor-internal.h"

    39 #include "razor.h"

    40 

    41 void *

    42 zalloc(size_t size)

    43 {

    44 	void *p;

    45 

    46 	p = malloc(size);

    47 	memset(p, 0, size);

    48 

    49 	return p;

    50 }

    51 

    52 struct razor_set_section razor_sections[] = {

    53 	{ RAZOR_STRING_POOL,	offsetof(struct razor_set, string_pool) },

    54 	{ RAZOR_PACKAGES,	offsetof(struct razor_set, packages) },

    55 	{ RAZOR_PROPERTIES,	offsetof(struct razor_set, properties) },

    56 	{ RAZOR_PACKAGE_POOL,	offsetof(struct razor_set, package_pool) },

    57 	{ RAZOR_PROPERTY_POOL,	offsetof(struct razor_set, property_pool) },

    58 };

    59 

    60 struct razor_set_section razor_files_sections[] = {

    61 	{ RAZOR_FILES,			offsetof(struct razor_set, files) },

    62 	{ RAZOR_FILE_POOL,		offsetof(struct razor_set, file_pool) },

    63 	{ RAZOR_FILE_STRING_POOL,	offsetof(struct razor_set, file_string_pool) },

    64 };

    65 

    66 struct razor_set_section razor_details_sections[] = {

    67 	{ RAZOR_DETAILS_STRING_POOL,	offsetof(struct razor_set, details_string_pool) },

    68 };

    69 

    70 RAZOR_EXPORT struct razor_set *

    71 razor_set_create(void)

    72 {

    73 	struct razor_set *set;

    74 	struct razor_entry *e;

    75 	char *empty;

    76 

    77 	set = zalloc(sizeof *set);

    78 

    79 	e = array_add(&set->files, sizeof *e);

    80 	empty = array_add(&set->string_pool, 1);

    81 	*empty = '\0';

    82 	e->name = 0;

    83 	e->flags = RAZOR_ENTRY_LAST;

    84 	e->start = 0;

    85 	list_set_empty(&e->packages);

    86 

    87 	return set;

    88 }

    89 

    90 RAZOR_EXPORT struct razor_set *

    91 razor_set_open(const char *filename)

    92 {

    93 	struct razor_set *set;

    94 	struct razor_set_section *s;

    95 	struct stat stat;

    96 	struct array *array;

    97 	int fd;

    98 

    99 	set = zalloc(sizeof *set);

   100 	fd = open(filename, O_RDONLY);

   101 	if (fstat(fd, &stat) < 0)

   102 		return NULL;

   103 	set->header = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);

   104 	if (set->header == MAP_FAILED) {

   105 		free(set);

   106 		return NULL;

   107 	}

   108 

   109 	for (s = set->header->sections; ~s->type; s++) {

   110 		if (s->type >= ARRAY_SIZE(razor_sections))

   111 			continue;

   112 		if (s->type != razor_sections[s->type].type)

   113 			continue;

   114 		array = (void *) set + razor_sections[s->type].offset;

   115 		array->data = (void *) set->header + s->offset;

   116 		array->size = s->size;

   117 		array->alloc = s->size;

   118 	}

   119 	close(fd);

   120 

   121 	return set;

   122 }

   123 

   124 RAZOR_EXPORT int

   125 razor_set_open_details(struct razor_set *set, const char *filename)

   126 {

   127 	struct razor_set_section *s;

   128 	struct stat stat;

   129 	struct array *array;

   130 	int fd;

   131 

   132 	assert (set != NULL);

   133 	assert (filename != NULL);

   134 

   135 	fd = open(filename, O_RDONLY);

   136 	if (fstat(fd, &stat) < 0)

   137 		return -1;

   138 	set->details_header = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);

   139 	if (set->details_header == MAP_FAILED)

   140 		return -1;

   141 

   142 	for (s = set->details_header->sections; ~s->type; s++) {

   143 		if (s->type >= ARRAY_SIZE(razor_details_sections))

   144 			continue;

   145 		if (s->type != razor_details_sections[s->type].type)

   146 			continue;

   147 		array = (void *) set + razor_details_sections[s->type].offset;

   148 		array->data = (void *) set->details_header + s->offset;

   149 		array->size = s->size;

   150 		array->alloc = s->size;

   151 	}

   152 	close(fd);

   153 

   154 	return 0;

   155 }

   156 

   157 RAZOR_EXPORT int

   158 razor_set_open_files(struct razor_set *set, const char *filename)

   159 {

   160 	struct razor_set_section *s;

   161 	struct stat stat;

   162 	struct array *array;

   163 	int fd;

   164 

   165 	assert (set != NULL);

   166 	assert (filename != NULL);

   167 

   168 	fd = open(filename, O_RDONLY);

   169 	if (fstat(fd, &stat) < 0)

   170 		return -1;

   171 	set->files_header = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);

   172 	if (set->files_header == MAP_FAILED)

   173 		return -1;

   174 

   175 	for (s = set->files_header->sections; ~s->type; s++) {

   176 		if (s->type >= ARRAY_SIZE(razor_files_sections))

   177 			continue;

   178 		if (s->type != razor_files_sections[s->type].type)

   179 			continue;

   180 		array = (void *) set + razor_files_sections[s->type].offset;

   181 		array->data = (void *) set->files_header + s->offset;

   182 		array->size = s->size;

   183 		array->alloc = s->size;

   184 	}

   185 	close(fd);

   186 

   187 	return 0;

   188 }

   189 

   190 RAZOR_EXPORT void

   191 razor_set_destroy(struct razor_set *set)

   192 {

   193 	unsigned int size;

   194 	struct array *a;

   195 	int i;

   196 

   197 	assert (set != NULL);

   198 

   199 	if (set->header) {

   200 		for (i = 0; set->header->sections[i].type; i++)

   201 			;

   202 		size = set->header->sections[i].type;

   203 		munmap(set->header, size);

   204 	} else {

   205 		for (i = 0; i < ARRAY_SIZE(razor_sections); i++) {

   206 			a = (void *) set + razor_sections[i].offset;

   207 			free(a->data);

   208 		}

   209 	}

   210 

   211 	if (set->details_header) {

   212 		for (i = 0; set->details_header->sections[i].type; i++)

   213 			;

   214 		size = set->details_header->sections[i].type;

   215 		munmap(set->details_header, size);

   216 	} else {

   217 		for (i = 0; i < ARRAY_SIZE(razor_details_sections); i++) {

   218 			a = (void *) set + razor_details_sections[i].offset;

   219 			free(a->data);

   220 		}

   221 	}

   222 

   223 	if (set->files_header) {

   224 		for (i = 0; set->files_header->sections[i].type; i++)

   225 			;

   226 		size = set->files_header->sections[i].type;

   227 		munmap(set->files_header, size);

   228 	} else {

   229 		for (i = 0; i < ARRAY_SIZE(razor_files_sections); i++) {

   230 			a = (void *) set + razor_files_sections[i].offset;

   231 			free(a->data);

   232 		}

   233 	}

   234 

   235 	free(set);

   236 }

   237 

   238 static int

   239 razor_set_write_sections_to_fd(struct razor_set *set, int fd, int magic,

   240 			       struct razor_set_section *sections,

   241 			       size_t array_size)

   242 {

   243 	char data[4096];

   244 	struct razor_set_header *header = (struct razor_set_header *) data;

   245 	struct array *a;

   246 	uint32_t offset;

   247 	int i;

   248 

   249 	memset(data, 0, sizeof data);

   250 	header->magic = magic;

   251 	header->version = RAZOR_VERSION;

   252 	offset = sizeof data;

   253 

   254 	for (i = 0; i < array_size; i++) {

   255 		if (sections[i].type != i)

   256 			continue;

   257 		a = (void *) set + sections[i].offset;

   258 		header->sections[i].type = i;

   259 		header->sections[i].offset = offset;

   260 		header->sections[i].size = a->size;

   261 		offset += ALIGN(a->size, 4096);

   262 	}

   263 

   264 	header->sections[i].type = ~0;

   265 	header->sections[i].offset = 0;

   266 	header->sections[i].size = 0;

   267 

   268 	razor_write(fd, data, sizeof data);

   269 	memset(data, 0, sizeof data);

   270 	for (i = 0; i < array_size; i++) {

   271 		if (sections[i].type != i)

   272 			continue;

   273 		a = (void *) set + sections[i].offset;

   274 		razor_write(fd, a->data, a->size);

   275 		razor_write(fd, data, ALIGN(a->size, 4096) - a->size);

   276 	}

   277 

   278 	return 0;

   279 }

   280 

   281 RAZOR_EXPORT int

   282 razor_set_write_to_fd(struct razor_set *set, int fd,

   283 		      enum razor_repo_file_type type)

   284 {

   285 	switch (type) {

   286 	case RAZOR_REPO_FILE_MAIN:

   287 		return razor_set_write_sections_to_fd(set, fd, RAZOR_MAGIC,

   288 						      razor_sections,

   289 						      ARRAY_SIZE(razor_sections));

   290 

   291 	case RAZOR_REPO_FILE_DETAILS:

   292 		return razor_set_write_sections_to_fd(set, fd, RAZOR_DETAILS_MAGIC,

   293 						      razor_details_sections,

   294 						      ARRAY_SIZE(razor_details_sections));

   295 	case RAZOR_REPO_FILE_FILES:

   296 		return razor_set_write_sections_to_fd(set, fd, RAZOR_FILES_MAGIC,

   297 						      razor_files_sections,

   298 						      ARRAY_SIZE(razor_files_sections));

   299 	default:

   300 		return -1;

   301 	}

   302 }

   303 

   304 RAZOR_EXPORT int

   305 razor_set_write(struct razor_set *set, const char *filename,

   306 		enum razor_repo_file_type type)

   307 {

   308 	int fd, status;

   309 

   310 	fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0666);

   311 	if (fd < 0)

   312 		return -1;

   313 

   314 	status = razor_set_write_to_fd(set, fd, type);

   315 	if (status) {

   316 	    close(fd);

   317 	    return status;

   318 	}

   319 

   320 	return close(fd);

   321 }

   322 

   323 RAZOR_EXPORT void

   324 razor_build_evr(char *evr_buf, int size, const char *epoch,

   325 		const char *version, const char *release)

   326 {

   327 	int len;

   328 

   329 	if (!version || !*version) {

   330 		*evr_buf = '\0';

   331 		return;

   332 	}

   333 

   334 	if (epoch && *epoch && strcmp(epoch, "0") != 0) {

   335 		len = snprintf(evr_buf, size, "%s:", epoch);

   336 		evr_buf += len;

   337 		size -= len;

   338 	}

   339 	len = snprintf(evr_buf, size, "%s", version);

   340 	evr_buf += len;

   341 	size -= len;

   342 	if (release && *release)

   343 		snprintf(evr_buf, size, "-%s", release);

   344 }

   345 

   346 RAZOR_EXPORT int

   347 razor_versioncmp(const char *s1, const char *s2)

   348 {

   349 	const char *p1, *p2;

   350 	long n1, n2;

   351 	int res;

   352 

   353 	assert (s1 != NULL);

   354 	assert (s2 != NULL);

   355 

   356 	n1 = strtol(s1, (char **) &p1, 10);

   357 	n2 = strtol(s2, (char **) &p2, 10);

   358 

   359 	/* Epoch; if one but not the other has an epoch set, default

   360 	 * the epoch-less version to 0. */

   361 	res = (*p1 == ':') - (*p2 == ':');

   362 	if (res < 0) {

   363 		n1 = 0;

   364 		p1 = s1;

   365 		p2++;

   366 	} else if (res > 0) {

   367 		p1++;

   368 		n2 = 0;

   369 		p2 = s2;

   370 	}

   371 

   372 	if (n1 != n2)

   373 		return n1 - n2;

   374 	while (*p1 && *p2) {

   375 		if (*p1 != *p2)

   376 			return *p1 - *p2;

   377 		p1++;

   378 		p2++;

   379 		if (isdigit(*p1) && isdigit(*p2))

   380 			return razor_versioncmp(p1, p2);

   381 	}

   382 

   383 	return *p1 - *p2;

   384 }

   385 

   386 RAZOR_EXPORT struct razor_package *

   387 razor_set_get_package(struct razor_set *set, const char *package)

   388 {

   389 	struct razor_package_iterator *pi;

   390 	struct razor_package *p;

   391 	const char *name;

   392 

   393 	assert (set != NULL);

   394 	assert (package != NULL);

   395 

   396 	pi = razor_package_iterator_create(set);

   397 	while (razor_package_iterator_next(pi, &p, RAZOR_DETAIL_NAME, &name, 0)) {

   398 		if (strcmp(package, name) == 0)

   399 			break;

   400 	}

   401 	razor_package_iterator_destroy(pi);

   402 

   403 	return p;

   404 }

   405 

   406 static const char *

   407 razor_package_get_details_type(struct razor_set *set,

   408 			       struct razor_package *package,

   409 			       enum razor_detail_type type)

   410 {

   411 	const char *pool;

   412 

   413 	switch (type) {

   414 	case RAZOR_DETAIL_NAME:

   415 		pool = set->string_pool.data;

   416 		return &pool[package->name];

   417 

   418 	case RAZOR_DETAIL_VERSION:

   419 		pool = set->string_pool.data;

   420 		return &pool[package->version];

   421 

   422 	case RAZOR_DETAIL_ARCH:

   423 		pool = set->string_pool.data;

   424 		return &pool[package->arch];

   425 

   426 	case RAZOR_DETAIL_SUMMARY:

   427 		pool = set->details_string_pool.data;

   428 		return &pool[package->summary];

   429 

   430 	case RAZOR_DETAIL_DESCRIPTION:

   431 		pool = set->details_string_pool.data;

   432 		return &pool[package->description];

   433 

   434 	case RAZOR_DETAIL_URL:

   435 		pool = set->details_string_pool.data;

   436 		return &pool[package->url];

   437 

   438 	case RAZOR_DETAIL_LICENSE:

   439 		pool = set->details_string_pool.data;

   440 		return &pool[package->license];

   441 

   442 	default:

   443 		fprintf(stderr, "type %u not found\n", type);

   444 		return NULL;

   445 	}

   446 }

   447 

   448 /**

   449  * razor_package_get_details_varg:

   450  * @set: a %razor_set

   451  * @package: a %razor_package

   452  * @args: a va_list of arguments to set

   453  **/

   454 void

   455 razor_package_get_details_varg(struct razor_set *set,

   456 			       struct razor_package *package,

   457 			       va_list args)

   458 {

   459 	int i;

   460 	enum razor_detail_type type;

   461 	const char **data;

   462 

   463 	for (i = 0;; i += 2) {

   464 		type = va_arg(args, enum razor_detail_type);

   465 		if (type == 0)

   466 			break;

   467 		data = va_arg(args, const char **);

   468 		*data = razor_package_get_details_type(set, package, type);

   469 	}

   470 

   471 }

   472 

   473 /**

   474  * razor_package_get_details:

   475  * @set: a %razor_set

   476  * @package: a %razor_package

   477  *

   478  * Gets details about a package using a varg interface

   479  * The vararg must be terminated with zero.

   480  *

   481  * Example: razor_package_get_details (set, package, RAZOR_DETAIL_URL, &url, 0);

   482  **/

   483 RAZOR_EXPORT void

   484 razor_package_get_details(struct razor_set *set, struct razor_package *package, ...)

   485 {

   486 	va_list args;

   487 

   488 	assert (set != NULL);

   489 	assert (package != NULL);

   490 

   491 	va_start(args, NULL);

   492 	razor_package_get_details_varg (set, package, args);

   493 	va_end (args);

   494 }

   495 

   496 RAZOR_EXPORT const char *

   497 razor_property_relation_to_string(struct razor_property *p)

   498 {

   499 	assert (p != NULL);

   500 

   501 	switch (p->flags & RAZOR_PROPERTY_RELATION_MASK) {

   502 	case RAZOR_PROPERTY_LESS:

   503 		return "<";

   504 

   505 	case RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL:

   506 		return "<=";

   507 

   508 	case RAZOR_PROPERTY_EQUAL:

   509 		return "=";

   510 

   511 	case RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL:

   512 		return ">=";

   513 

   514 	case RAZOR_PROPERTY_GREATER:

   515 		return ">";

   516 

   517 	default:

   518 		return "?";

   519 	}

   520 }

   521 

   522 RAZOR_EXPORT const char *

   523 razor_property_type_to_string(struct razor_property *p)

   524 {

   525 	assert (p != NULL);

   526 

   527 	switch (p->flags & RAZOR_PROPERTY_TYPE_MASK) {

   528 	case RAZOR_PROPERTY_REQUIRES:

   529 		return "requires";

   530 	case RAZOR_PROPERTY_PROVIDES:

   531 		return "provides";

   532 	case RAZOR_PROPERTY_CONFLICTS:

   533 		return "conflicts";

   534 	case RAZOR_PROPERTY_OBSOLETES:

   535 		return "obsoletes";

   536 	default:

   537 		return NULL;

   538 	}

   539 }

   540 

   541 RAZOR_EXPORT struct razor_entry *

   542 razor_set_find_entry(struct razor_set *set,

   543 		     struct razor_entry *dir, const char *pattern)

   544 {

   545 	struct razor_entry *e;

   546 	const char *n, *pool = set->file_string_pool.data;

   547 	int len;

   548 

   549 	assert (set != NULL);

   550 	assert (dir != NULL);

   551 	assert (pattern != NULL);

   552 

   553 	e = (struct razor_entry *) set->files.data + dir->start;

   554 	do {

   555 		n = pool + e->name;

   556 		if (strcmp(pattern + 1, n) == 0)

   557 			return e;

   558 		len = strlen(n);

   559 		if (e->start != 0 && strncmp(pattern + 1, n, len) == 0 &&

   560 		    pattern[len + 1] == '/') {

   561 			return razor_set_find_entry(set, e, pattern + len + 1);

   562 		}

   563 	} while (!((e++)->flags & RAZOR_ENTRY_LAST));

   564 

   565 	return NULL;

   566 }

   567 

   568 static void

   569 list_dir(struct razor_set *set, struct razor_entry *dir,

   570 	 char *prefix, const char *pattern)

   571 {

   572 	struct razor_entry *e;

   573 	const char *n, *pool = set->file_string_pool.data;

   574 

   575 	e = (struct razor_entry *) set->files.data + dir->start;

   576 	do {

   577 		n = pool + e->name;

   578 		if (pattern && pattern[0] && fnmatch(pattern, n, 0) != 0)

   579 			continue;

   580 		printf("%s/%s\n", prefix, n);

   581 		if (e->start) {

   582 			char *sub = prefix + strlen (prefix);

   583 			*sub = '/';

   584 			strcpy (sub + 1, n);

   585 			list_dir(set, e, prefix, pattern);

   586 			*sub = '\0';

   587 		}

   588 	} while (!((e++)->flags & RAZOR_ENTRY_LAST));

   589 }

   590 

   591 RAZOR_EXPORT void

   592 razor_set_list_files(struct razor_set *set, const char *pattern)

   593 {

   594 	struct razor_entry *e;

   595 	char buffer[512], *p, *base;

   596 

   597 	assert (set != NULL);

   598 

   599 	if (pattern == NULL || !strcmp (pattern, "/")) {

   600 		buffer[0] = '\0';

   601 		list_dir(set, set->files.data, buffer, NULL);

   602 		return;

   603 	}

   604 

   605 	strcpy(buffer, pattern);

   606 	e = razor_set_find_entry(set, set->files.data, buffer);

   607 	if (e && e->start > 0) {

   608 		base = NULL;

   609 	} else {

   610 		p = strrchr(buffer, '/');

   611 		if (p) {

   612 			*p = '\0';

   613 			base = p + 1;

   614 		} else {

   615 			base = NULL;

   616 		}

   617 	}

   618 	e = razor_set_find_entry(set, set->files.data, buffer);

   619 	if (e && e->start != 0)

   620 		list_dir(set, e, buffer, base);

   621 }

   622 

   623 static struct list *

   624 list_package_files(struct razor_set *set, struct list *r,

   625 		   struct razor_entry *dir, uint32_t end,

   626 		   char *prefix)

   627 {

   628 	struct razor_entry *e, *f, *entries;

   629 	uint32_t next, file;

   630 	char *pool;

   631 	int len;

   632 

   633 	entries = (struct razor_entry *) set->files.data;

   634 	pool = set->file_string_pool.data;

   635 

   636 	e = entries + dir->start;

   637 	do {

   638 		if (entries + r->data == e) {

   639 			printf("%s/%s\n", prefix, pool + e->name);

   640 			r = list_next(r);

   641 			if (!r)

   642 				return NULL;

   643 			if (r->data >= end)

   644 				return r;

   645 		}

   646 	} while (!((e++)->flags & RAZOR_ENTRY_LAST));

   647 

   648 	e = entries + dir->start;

   649 	do {

   650 		if (e->start == 0)

   651 			continue;

   652 

   653 		if (e->flags & RAZOR_ENTRY_LAST)

   654 			next = end;

   655 		else {

   656 			f = e + 1;

   657 			while (f->start == 0 && !(f->flags & RAZOR_ENTRY_LAST))

   658 				f++;

   659 			if (f->start == 0)

   660 				next = end;

   661 			else

   662 				next = f->start;

   663 		}

   664 

   665 		file = r->data;

   666 		if (e->start <= file && file < next) {

   667 			len = strlen(prefix);

   668 			prefix[len] = '/';

   669 			strcpy(prefix + len + 1, pool + e->name);

   670 			r = list_package_files(set, r, e, next, prefix);

   671 			prefix[len] = '\0';

   672 		}

   673 	} while (!((e++)->flags & RAZOR_ENTRY_LAST) && r != NULL);

   674 

   675 	return r;

   676 }

   677 

   678 RAZOR_EXPORT void

   679 razor_set_list_package_files(struct razor_set *set, const char *name)

   680 {

   681 	struct razor_package *package;

   682 	struct list *r;

   683 	uint32_t end;

   684 	char buffer[512];

   685 

   686 	assert (set != NULL);

   687 	assert (name != NULL);

   688 

   689 	package = razor_set_get_package(set, name);

   690 	/* TODO: we should return the error to the caller */

   691 	if (!package)

   692 		return;

   693 

   694 	r = list_first(&package->files, &set->file_pool);

   695 	end = set->files.size / sizeof (struct razor_entry);

   696 	buffer[0] = '\0';

   697 	list_package_files(set, r, set->files.data, end, buffer);

   698 }

   699 

   700 /* The diff order matters.  We should sort the packages so that a

   701  * REMOVE of a package comes before the INSTALL, and so that all

   702  * requires for a package have been installed before the package.

   703  **/

   704 

   705 RAZOR_EXPORT void

   706 razor_set_diff(struct razor_set *set, struct razor_set *upstream,

   707 	       razor_diff_callback_t callback, void *data)

   708 {

   709  	struct razor_package_iterator *pi1, *pi2;

   710  	struct razor_package *p1, *p2;

   711 	const char *name1, *name2, *version1, *version2, *arch1, *arch2;

   712 	int res;

   713 

   714 	assert (set != NULL);

   715 	assert (upstream != NULL);

   716 

   717 	pi1 = razor_package_iterator_create(set);

   718 	pi2 = razor_package_iterator_create(upstream);

   719 

   720 	razor_package_iterator_next(pi1, &p1,

   721 				    RAZOR_DETAIL_NAME, &name1,

   722 				    RAZOR_DETAIL_VERSION, &version1,

   723 				    RAZOR_DETAIL_ARCH, &arch1,

   724 				    0);

   725 	razor_package_iterator_next(pi2, &p2,

   726 				    RAZOR_DETAIL_NAME, &name2,

   727 				    RAZOR_DETAIL_VERSION, &version2,

   728 				    RAZOR_DETAIL_ARCH, &arch2,

   729 				    0);

   730 

   731 	while (p1 || p2) {

   732 		if (p1 && p2) {

   733 			res = strcmp(name1, name2);

   734 			if (res == 0)

   735 				res = razor_versioncmp(version1, version2);

   736 		} else {

   737 			res = 0;

   738 		}

   739 

   740 		if (p2 == NULL || res < 0)

   741 			callback(RAZOR_DIFF_ACTION_REMOVE,

   742 				 p1, name1, version1, arch1, data);

   743 		else if (p1 == NULL || res > 0)

   744 			callback(RAZOR_DIFF_ACTION_ADD,

   745 				 p2, name2, version2, arch2, data);

   746 

   747 		if (p1 != NULL && res <= 0)

   748 			razor_package_iterator_next(pi1, &p1,

   749 						    RAZOR_DETAIL_NAME, &name1,

   750 						    RAZOR_DETAIL_VERSION, &version1,

   751 						    RAZOR_DETAIL_ARCH, &arch1,

   752 						    0);

   753 		if (p2 != NULL && res >= 0)

   754 			razor_package_iterator_next(pi2, &p2,

   755 						    RAZOR_DETAIL_NAME, &name2,

   756 						    RAZOR_DETAIL_VERSION, &version2,

   757 						    RAZOR_DETAIL_ARCH, &arch2,

   758 						    0);

   759 	}

   760 

   761 	razor_package_iterator_destroy(pi1);

   762 	razor_package_iterator_destroy(pi2);

   763 }

   764 

   765 static void

   766 add_new_package(enum razor_diff_action action,

   767 		struct razor_package *package,

   768 		const char *name,

   769 		const char *version,

   770 		const char *arch,

   771 		void *data)

   772 {

   773 	if (action == RAZOR_DIFF_ACTION_ADD)

   774 		razor_package_query_add_package(data, package);

   775 }

   776 

   777 RAZOR_EXPORT struct razor_package_iterator *

   778 razor_set_create_remove_iterator(struct razor_set *set,

   779 				 struct razor_set *next)

   780 {

   781 	struct razor_package_query *query;

   782 	struct razor_package_iterator *pi;

   783 

   784 	assert (set != NULL);

   785 	assert (next != NULL);

   786 

   787 	query = razor_package_query_create(set);

   788 	razor_set_diff(next, set, add_new_package, query);

   789 

   790 	pi = razor_package_query_finish(query);

   791 

   792 	/* FIXME: We need to figure out the right install order here,

   793 	 * so the post and pre scripts can run. */

   794 

   795 	/* sort */

   796 

   797 	return pi;

   798 }

   799 

   800 RAZOR_EXPORT struct razor_package_iterator *

   801 razor_set_create_install_iterator(struct razor_set *set,

   802 				  struct razor_set *next)

   803 {

   804 	struct razor_package_query *query;

   805 	struct razor_package_iterator *pi;

   806 

   807 	assert (set != NULL);

   808 	assert (next != NULL);

   809 

   810 	query = razor_package_query_create(next);

   811 	razor_set_diff(set, next, add_new_package, query);

   812 

   813 	pi = razor_package_query_finish(query);

   814 

   815 	/* FIXME: We need to figure out the right install order here,

   816 	 * so the post and pre scripts can run. */

   817 

   818 	/* sort */

   819 

   820 	return pi;

   821 }
razor