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librazor/razor.c
author Kristian H?gsberg <krh@redhat.com>
Tue Jul 01 09:44:46 2008 -0400 (2008-07-01)
changeset 308 f4761f529b9e
parent 307 95b6bcadd6c4
child 316 5ebed314390c
permissions -rw-r--r--
Update docs for the RAZOR_DETAIL_LAST change. 
     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 static const char *

   387 razor_package_get_details_type(struct razor_set *set,

   388 			       struct razor_package *package,

   389 			       enum razor_detail_type type)

   390 {

   391 	const char *pool;

   392 

   393 	switch (type) {

   394 	case RAZOR_DETAIL_NAME:

   395 		pool = set->string_pool.data;

   396 		return &pool[package->name];

   397 

   398 	case RAZOR_DETAIL_VERSION:

   399 		pool = set->string_pool.data;

   400 		return &pool[package->version];

   401 

   402 	case RAZOR_DETAIL_ARCH:

   403 		pool = set->string_pool.data;

   404 		return &pool[package->arch];

   405 

   406 	case RAZOR_DETAIL_SUMMARY:

   407 		pool = set->details_string_pool.data;

   408 		return &pool[package->summary];

   409 

   410 	case RAZOR_DETAIL_DESCRIPTION:

   411 		pool = set->details_string_pool.data;

   412 		return &pool[package->description];

   413 

   414 	case RAZOR_DETAIL_URL:

   415 		pool = set->details_string_pool.data;

   416 		return &pool[package->url];

   417 

   418 	case RAZOR_DETAIL_LICENSE:

   419 		pool = set->details_string_pool.data;

   420 		return &pool[package->license];

   421 

   422 	default:

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

   424 		return NULL;

   425 	}

   426 }

   427 

   428 /**

   429  * razor_package_get_details_varg:

   430  * @set: a %razor_set

   431  * @package: a %razor_package

   432  * @args: a va_list of arguments to set

   433  **/

   434 void

   435 razor_package_get_details_varg(struct razor_set *set,

   436 			       struct razor_package *package,

   437 			       va_list args)

   438 {

   439 	int i;

   440 	enum razor_detail_type type;

   441 	const char **data;

   442 

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

   444 		type = va_arg(args, enum razor_detail_type);

   445 		if (type == RAZOR_DETAIL_LAST)

   446 			break;

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

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

   449 	}

   450 

   451 }

   452 

   453 /**

   454  * razor_package_get_details:

   455  * @set: a %razor_set

   456  * @package: a %razor_package

   457  *

   458  * Gets details about a package using a varg interface

   459  * The vararg must be terminated with %RAZOR_DETAIL_LAST.

   460  *

   461  * Example: razor_package_get_details (set, package,

   462  *				       RAZOR_DETAIL_URL, &url,

   463  *				       RAZOR_DETAIL_LAST);

   464  **/

   465 RAZOR_EXPORT void

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

   467 {

   468 	va_list args;

   469 

   470 	assert (set != NULL);

   471 	assert (package != NULL);

   472 

   473 	va_start(args, NULL);

   474 	razor_package_get_details_varg (set, package, args);

   475 	va_end (args);

   476 }

   477 

   478 RAZOR_EXPORT const char *

   479 razor_property_relation_to_string(struct razor_property *p)

   480 {

   481 	assert (p != NULL);

   482 

   483 	switch (p->flags & RAZOR_PROPERTY_RELATION_MASK) {

   484 	case RAZOR_PROPERTY_LESS:

   485 		return "<";

   486 

   487 	case RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL:

   488 		return "<=";

   489 

   490 	case RAZOR_PROPERTY_EQUAL:

   491 		return "=";

   492 

   493 	case RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL:

   494 		return ">=";

   495 

   496 	case RAZOR_PROPERTY_GREATER:

   497 		return ">";

   498 

   499 	default:

   500 		return "?";

   501 	}

   502 }

   503 

   504 RAZOR_EXPORT const char *

   505 razor_property_type_to_string(struct razor_property *p)

   506 {

   507 	assert (p != NULL);

   508 

   509 	switch (p->flags & RAZOR_PROPERTY_TYPE_MASK) {

   510 	case RAZOR_PROPERTY_REQUIRES:

   511 		return "requires";

   512 	case RAZOR_PROPERTY_PROVIDES:

   513 		return "provides";

   514 	case RAZOR_PROPERTY_CONFLICTS:

   515 		return "conflicts";

   516 	case RAZOR_PROPERTY_OBSOLETES:

   517 		return "obsoletes";

   518 	default:

   519 		return NULL;

   520 	}

   521 }

   522 

   523 RAZOR_EXPORT struct razor_entry *

   524 razor_set_find_entry(struct razor_set *set,

   525 		     struct razor_entry *dir, const char *pattern)

   526 {

   527 	struct razor_entry *e;

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

   529 	int len;

   530 

   531 	assert (set != NULL);

   532 	assert (dir != NULL);

   533 	assert (pattern != NULL);

   534 

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

   536 	do {

   537 		n = pool + e->name;

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

   539 			return e;

   540 		len = strlen(n);

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

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

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

   544 		}

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

   546 

   547 	return NULL;

   548 }

   549 

   550 static void

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

   552 	 char *prefix, const char *pattern)

   553 {

   554 	struct razor_entry *e;

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

   556 

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

   558 	do {

   559 		n = pool + e->name;

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

   561 			continue;

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

   563 		if (e->start) {

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

   565 			*sub = '/';

   566 			strcpy (sub + 1, n);

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

   568 			*sub = '\0';

   569 		}

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

   571 }

   572 

   573 RAZOR_EXPORT void

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

   575 {

   576 	struct razor_entry *e;

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

   578 

   579 	assert (set != NULL);

   580 

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

   582 		buffer[0] = '\0';

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

   584 		return;

   585 	}

   586 

   587 	strcpy(buffer, pattern);

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

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

   590 		base = NULL;

   591 	} else {

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

   593 		if (p) {

   594 			*p = '\0';

   595 			base = p + 1;

   596 		} else {

   597 			base = NULL;

   598 		}

   599 	}

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

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

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

   603 }

   604 

   605 static struct list *

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

   607 		   struct razor_entry *dir, uint32_t end,

   608 		   char *prefix)

   609 {

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

   611 	uint32_t next, file;

   612 	char *pool;

   613 	int len;

   614 

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

   616 	pool = set->file_string_pool.data;

   617 

   618 	e = entries + dir->start;

   619 	do {

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

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

   622 			r = list_next(r);

   623 			if (!r)

   624 				return NULL;

   625 			if (r->data >= end)

   626 				return r;

   627 		}

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

   629 

   630 	e = entries + dir->start;

   631 	do {

   632 		if (e->start == 0)

   633 			continue;

   634 

   635 		if (e->flags & RAZOR_ENTRY_LAST)

   636 			next = end;

   637 		else {

   638 			f = e + 1;

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

   640 				f++;

   641 			if (f->start == 0)

   642 				next = end;

   643 			else

   644 				next = f->start;

   645 		}

   646 

   647 		file = r->data;

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

   649 			len = strlen(prefix);

   650 			prefix[len] = '/';

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

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

   653 			prefix[len] = '\0';

   654 		}

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

   656 

   657 	return r;

   658 }

   659 

   660 RAZOR_EXPORT void

   661 razor_set_list_package_files(struct razor_set *set,

   662 			     struct razor_package *package)

   663 {

   664 	struct list *r;

   665 	uint32_t end;

   666 	char buffer[512];

   667 

   668 	assert (set != NULL);

   669 	assert (package != NULL);

   670 

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

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

   673 	buffer[0] = '\0';

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

   675 }

   676 

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

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

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

   680  **/

   681 

   682 RAZOR_EXPORT void

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

   684 	       razor_diff_callback_t callback, void *data)

   685 {

   686  	struct razor_package_iterator *pi1, *pi2;

   687  	struct razor_package *p1, *p2;

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

   689 	int res;

   690 

   691 	assert (set != NULL);

   692 	assert (upstream != NULL);

   693 

   694 	pi1 = razor_package_iterator_create(set);

   695 	pi2 = razor_package_iterator_create(upstream);

   696 

   697 	razor_package_iterator_next(pi1, &p1,

   698 				    RAZOR_DETAIL_NAME, &name1,

   699 				    RAZOR_DETAIL_VERSION, &version1,

   700 				    RAZOR_DETAIL_ARCH, &arch1,

   701 				    RAZOR_DETAIL_LAST);

   702 	razor_package_iterator_next(pi2, &p2,

   703 				    RAZOR_DETAIL_NAME, &name2,

   704 				    RAZOR_DETAIL_VERSION, &version2,

   705 				    RAZOR_DETAIL_ARCH, &arch2,

   706 				    RAZOR_DETAIL_LAST);

   707 

   708 	while (p1 || p2) {

   709 		if (p1 && p2) {

   710 			res = strcmp(name1, name2);

   711 			if (res == 0)

   712 				res = razor_versioncmp(version1, version2);

   713 		} else {

   714 			res = 0;

   715 		}

   716 

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

   718 			callback(RAZOR_DIFF_ACTION_REMOVE,

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

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

   721 			callback(RAZOR_DIFF_ACTION_ADD,

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

   723 

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

   725 			razor_package_iterator_next(pi1, &p1,

   726 						    RAZOR_DETAIL_NAME, &name1,

   727 						    RAZOR_DETAIL_VERSION, &version1,

   728 						    RAZOR_DETAIL_ARCH, &arch1,

   729 						    RAZOR_DETAIL_LAST);

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

   731 			razor_package_iterator_next(pi2, &p2,

   732 						    RAZOR_DETAIL_NAME, &name2,

   733 						    RAZOR_DETAIL_VERSION, &version2,

   734 						    RAZOR_DETAIL_ARCH, &arch2,

   735 						    RAZOR_DETAIL_LAST);

   736 	}

   737 

   738 	razor_package_iterator_destroy(pi1);

   739 	razor_package_iterator_destroy(pi2);

   740 }

   741 

   742 static void

   743 add_new_package(enum razor_diff_action action,

   744 		struct razor_package *package,

   745 		const char *name,

   746 		const char *version,

   747 		const char *arch,

   748 		void *data)

   749 {

   750 	if (action == RAZOR_DIFF_ACTION_ADD)

   751 		razor_package_query_add_package(data, package);

   752 }

   753 

   754 RAZOR_EXPORT struct razor_package_iterator *

   755 razor_set_create_remove_iterator(struct razor_set *set,

   756 				 struct razor_set *next)

   757 {

   758 	struct razor_package_query *query;

   759 	struct razor_package_iterator *pi;

   760 

   761 	assert (set != NULL);

   762 	assert (next != NULL);

   763 

   764 	query = razor_package_query_create(set);

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

   766 

   767 	pi = razor_package_query_finish(query);

   768 

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

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

   771 

   772 	/* sort */

   773 

   774 	return pi;

   775 }

   776 

   777 RAZOR_EXPORT struct razor_package_iterator *

   778 razor_set_create_install_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(next);

   788 	razor_set_diff(set, next, 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 }
razor