diff options
Diffstat (limited to 'src/libopkg/pkg_depends.c')
| -rw-r--r-- | src/libopkg/pkg_depends.c | 931 |
1 files changed, 931 insertions, 0 deletions
diff --git a/src/libopkg/pkg_depends.c b/src/libopkg/pkg_depends.c new file mode 100644 index 0000000..1e14d1f --- /dev/null +++ b/src/libopkg/pkg_depends.c @@ -0,0 +1,931 @@ +/* pkg_depends.c - the opkg package management system + + Steven M. Ayer + + Copyright (C) 2002 Compaq Computer Corporation + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. +*/ + +#include <stdio.h> +#include <ctype.h> + +#include "pkg.h" +#include "opkg_utils.h" +#include "pkg_hash.h" +#include "opkg_message.h" +#include "pkg_parse.h" +#include "hash_table.h" +#include "libbb/libbb.h" + +static int parseDepends(compound_depend_t *compound_depend, char * depend_str); +static depend_t * depend_init(void); +static char ** add_unresolved_dep(pkg_t * pkg, char ** the_lost, int ref_ndx); +static char ** merge_unresolved(char ** oldstuff, char ** newstuff); +static int is_pkg_in_pkg_vec(pkg_vec_t * vec, pkg_t * pkg); + +static int pkg_installed_and_constraint_satisfied(pkg_t *pkg, void *cdata) +{ + depend_t *depend = (depend_t *)cdata; + if ((pkg->state_status == SS_INSTALLED || pkg->state_status == SS_UNPACKED) && version_constraints_satisfied(depend, pkg)) + return 1; + else + return 0; +} + +static int pkg_constraint_satisfied(pkg_t *pkg, void *cdata) +{ + depend_t *depend = (depend_t *)cdata; + if (version_constraints_satisfied(depend, pkg)) + return 1; + else + return 0; +} + +/* returns ndependencies or negative error value */ +int +pkg_hash_fetch_unsatisfied_dependencies(pkg_t * pkg, pkg_vec_t *unsatisfied, + char *** unresolved) +{ + pkg_t * satisfier_entry_pkg; + int i, j, k; + int count, found; + char ** the_lost; + abstract_pkg_t * ab_pkg; + + /* + * this is a setup to check for redundant/cyclic dependency checks, + * which are marked at the abstract_pkg level + */ + if (!(ab_pkg = pkg->parent)) { + opkg_msg(ERROR, "Internal error, with pkg %s.\n", pkg->name); + *unresolved = NULL; + return 0; + } + if (ab_pkg->dependencies_checked) { /* avoid duplicate or cyclic checks */ + *unresolved = NULL; + return 0; + } else { + ab_pkg->dependencies_checked = 1; /* mark it for subsequent visits */ + } + /**/ + + count = pkg->pre_depends_count + pkg->depends_count + pkg->recommends_count + pkg->suggests_count; + if (!count){ + *unresolved = NULL; + return 0; + } + + the_lost = NULL; + + /* foreach dependency */ + for (i = 0; i < count; i++) { + compound_depend_t * compound_depend = &pkg->depends[i]; + depend_t ** possible_satisfiers = compound_depend->possibilities;; + found = 0; + satisfier_entry_pkg = NULL; + + if (compound_depend->type == GREEDY_DEPEND) { + /* foreach possible satisfier */ + for (j = 0; j < compound_depend->possibility_count; j++) { + /* foreach provided_by, which includes the abstract_pkg itself */ + abstract_pkg_t *abpkg = possible_satisfiers[j]->pkg; + abstract_pkg_vec_t *ab_provider_vec = abpkg->provided_by; + int nposs = ab_provider_vec->len; + abstract_pkg_t **ab_providers = ab_provider_vec->pkgs; + int l; + for (l = 0; l < nposs; l++) { + pkg_vec_t *test_vec = ab_providers[l]->pkgs; + /* if no depends on this one, try the first package that Provides this one */ + if (!test_vec){ /* no pkg_vec hooked up to the abstract_pkg! (need another feed?) */ + continue; + } + + /* cruise this possiblity's pkg_vec looking for an installed version */ + for (k = 0; k < test_vec->len; k++) { + pkg_t *pkg_scout = test_vec->pkgs[k]; + /* not installed, and not already known about? */ + if ((pkg_scout->state_want != SW_INSTALL) + && !pkg_scout->parent->dependencies_checked + && !is_pkg_in_pkg_vec(unsatisfied, pkg_scout)) { + char ** newstuff = NULL; + int rc; + pkg_vec_t *tmp_vec = pkg_vec_alloc (); + /* check for not-already-installed dependencies */ + rc = pkg_hash_fetch_unsatisfied_dependencies(pkg_scout, + tmp_vec, + &newstuff); + if (newstuff == NULL) { + int m; + int ok = 1; + for (m = 0; m < rc; m++) { + pkg_t *p = tmp_vec->pkgs[m]; + if (p->state_want == SW_INSTALL) + continue; + opkg_msg(DEBUG, + "Not installing %s due" + " to requirement for %s.\n", + pkg_scout->name, + p->name); + ok = 0; + break; + } + pkg_vec_free (tmp_vec); + if (ok) { + /* mark this one for installation */ + opkg_msg(NOTICE, + "Adding satisfier for greedy" + " dependence %s.\n", + pkg_scout->name); + pkg_vec_insert(unsatisfied, pkg_scout); + } + } else { + opkg_msg(DEBUG, + "Not installing %s due to " + "broken depends.\n", + pkg_scout->name); + free (newstuff); + } + } + } + } + } + + continue; + } + + /* foreach possible satisfier, look for installed package */ + for (j = 0; j < compound_depend->possibility_count; j++) { + /* foreach provided_by, which includes the abstract_pkg itself */ + depend_t *dependence_to_satisfy = possible_satisfiers[j]; + abstract_pkg_t *satisfying_apkg = possible_satisfiers[j]->pkg; + pkg_t *satisfying_pkg = + pkg_hash_fetch_best_installation_candidate(satisfying_apkg, + pkg_installed_and_constraint_satisfied, + dependence_to_satisfy, 1); + /* Being that I can't test constraing in pkg_hash, I will test it here */ + if (satisfying_pkg != NULL) { + if (!pkg_installed_and_constraint_satisfied ( satisfying_pkg,dependence_to_satisfy)) { + satisfying_pkg = NULL; + } + } + opkg_msg(DEBUG, "satisfying_pkg=%p\n", satisfying_pkg); + if (satisfying_pkg != NULL) { + found = 1; + break; + } + + } + /* if nothing installed matches, then look for uninstalled satisfier */ + if (!found) { + /* foreach possible satisfier, look for installed package */ + for (j = 0; j < compound_depend->possibility_count; j++) { + /* foreach provided_by, which includes the abstract_pkg itself */ + depend_t *dependence_to_satisfy = possible_satisfiers[j]; + abstract_pkg_t *satisfying_apkg = possible_satisfiers[j]->pkg; + pkg_t *satisfying_pkg = + pkg_hash_fetch_best_installation_candidate(satisfying_apkg, + pkg_constraint_satisfied, + dependence_to_satisfy, 1); + /* Being that I can't test constraing in pkg_hash, I will test it here too */ + if (satisfying_pkg != NULL) { + if (!pkg_constraint_satisfied ( satisfying_pkg,dependence_to_satisfy)) { + satisfying_pkg = NULL; + } + } + + /* user request overrides package recommendation */ + if (satisfying_pkg != NULL + && (compound_depend->type == RECOMMEND || compound_depend->type == SUGGEST) + && (satisfying_pkg->state_want == SW_DEINSTALL || satisfying_pkg->state_want == SW_PURGE)) { + opkg_msg(NOTICE, "%s: ignoring recommendation for " + "%s at user request\n", + pkg->name, satisfying_pkg->name); + continue; + } + + opkg_msg(DEBUG, "satisfying_pkg=%p\n", satisfying_pkg); + if (satisfying_pkg != NULL) { + satisfier_entry_pkg = satisfying_pkg; + break; + } + } + } + + /* we didn't find one, add something to the unsatisfied vector */ + if (!found) { + if (!satisfier_entry_pkg) { + /* failure to meet recommendations is not an error */ + if (compound_depend->type != RECOMMEND && compound_depend->type != SUGGEST) + the_lost = add_unresolved_dep(pkg, the_lost, i); + else + opkg_msg(NOTICE, + "%s: unsatisfied recommendation for %s\n", + pkg->name, + compound_depend->possibilities[0]->pkg->name); + } + else { + if (compound_depend->type == SUGGEST) { + /* just mention it politely */ + opkg_msg(NOTICE, "package %s suggests installing %s\n", + pkg->name, satisfier_entry_pkg->name); + } else { + char ** newstuff = NULL; + + if (satisfier_entry_pkg != pkg && + !is_pkg_in_pkg_vec(unsatisfied, satisfier_entry_pkg)) { + pkg_vec_insert(unsatisfied, satisfier_entry_pkg); + pkg_hash_fetch_unsatisfied_dependencies(satisfier_entry_pkg, + unsatisfied, + &newstuff); + the_lost = merge_unresolved(the_lost, newstuff); + if (newstuff) + free(newstuff); + } + } + } + } + } + *unresolved = the_lost; + + return unsatisfied->len; +} + +/*checking for conflicts !in replaces + If a packages conflicts with another but is also replacing it, I should not consider it a + really conflicts + returns 0 if conflicts <> replaces or 1 if conflicts == replaces +*/ +static int +is_pkg_a_replaces(pkg_t *pkg_scout,pkg_t *pkg) +{ + int i ; + int replaces_count = pkg->replaces_count; + abstract_pkg_t **replaces; + + if (pkg->replaces_count==0) // No replaces, it's surely a conflict + return 0; + + replaces = pkg->replaces; + + for (i = 0; i < replaces_count; i++) { + if (strcmp(pkg_scout->name,pkg->replaces[i]->name)==0) { // Found + opkg_msg(DEBUG2, "Seems I've found a replace %s %s\n", + pkg_scout->name, pkg->replaces[i]->name); + return 1; + } + } + return 0; + +} + + +pkg_vec_t * pkg_hash_fetch_conflicts(pkg_t * pkg) +{ + pkg_vec_t * installed_conflicts, * test_vec; + compound_depend_t * conflicts; + depend_t ** possible_satisfiers; + depend_t * possible_satisfier; + int i, j, k; + int count; + abstract_pkg_t * ab_pkg; + pkg_t **pkg_scouts; + pkg_t *pkg_scout; + + /* + * this is a setup to check for redundant/cyclic dependency checks, + * which are marked at the abstract_pkg level + */ + if(!(ab_pkg = pkg->parent)){ + opkg_msg(ERROR, "Internal error: %s not in hash table\n", pkg->name); + return (pkg_vec_t *)NULL; + } + + conflicts = pkg->conflicts; + if(!conflicts){ + return (pkg_vec_t *)NULL; + } + installed_conflicts = pkg_vec_alloc(); + + count = pkg->conflicts_count; + + + + /* foreach conflict */ + for(i = 0; i < pkg->conflicts_count; i++){ + + possible_satisfiers = conflicts->possibilities; + + /* foreach possible satisfier */ + for(j = 0; j < conflicts->possibility_count; j++){ + possible_satisfier = possible_satisfiers[j]; + if (!possible_satisfier) + opkg_msg(ERROR, "Internal error: possible_satisfier=NULL\n"); + if (!possible_satisfier->pkg) + opkg_msg(ERROR, "Internal error: possible_satisfier->pkg=NULL\n"); + test_vec = possible_satisfier->pkg->pkgs; + if (test_vec) { + /* pkg_vec found, it is an actual package conflict + * cruise this possiblity's pkg_vec looking for an installed version */ + pkg_scouts = test_vec->pkgs; + for(k = 0; k < test_vec->len; k++){ + pkg_scout = pkg_scouts[k]; + if (!pkg_scout) { + opkg_msg(ERROR, "Internal error: pkg_scout=NULL\n"); + continue; + } + if ((pkg_scout->state_status == SS_INSTALLED || pkg_scout->state_want == SW_INSTALL) && + version_constraints_satisfied(possible_satisfier, pkg_scout) && !is_pkg_a_replaces(pkg_scout,pkg)){ + if (!is_pkg_in_pkg_vec(installed_conflicts, pkg_scout)){ + pkg_vec_insert(installed_conflicts, pkg_scout); + } + } + } + } + } + conflicts++; + } + + if (installed_conflicts->len) + return installed_conflicts; + pkg_vec_free(installed_conflicts); + return (pkg_vec_t *)NULL; +} + +int version_constraints_satisfied(depend_t * depends, pkg_t * pkg) +{ + pkg_t * temp; + int comparison; + + if(depends->constraint == NONE) + return 1; + + temp = pkg_new(); + + parse_version(temp, depends->version); + + comparison = pkg_compare_versions(pkg, temp); + + free (temp->version); + free(temp); + + if((depends->constraint == EARLIER) && + (comparison < 0)) + return 1; + else if((depends->constraint == LATER) && + (comparison > 0)) + return 1; + else if(comparison == 0) + return 1; + else if((depends->constraint == LATER_EQUAL) && + (comparison >= 0)) + return 1; + else if((depends->constraint == EARLIER_EQUAL) && + (comparison <= 0)) + return 1; + + return 0; +} + +int pkg_dependence_satisfiable(depend_t *depend) +{ + abstract_pkg_t *apkg = depend->pkg; + abstract_pkg_vec_t *provider_apkgs = apkg->provided_by; + int n_providers = provider_apkgs->len; + abstract_pkg_t **apkgs = provider_apkgs->pkgs; + pkg_vec_t *pkg_vec; + int n_pkgs ; + int i; + int j; + + for (i = 0; i < n_providers; i++) { + abstract_pkg_t *papkg = apkgs[i]; + pkg_vec = papkg->pkgs; + if (pkg_vec) { + n_pkgs = pkg_vec->len; + for (j = 0; j < n_pkgs; j++) { + pkg_t *pkg = pkg_vec->pkgs[j]; + if (version_constraints_satisfied(depend, pkg)) { + return 1; + } + } + } + } + return 0; +} + +int pkg_dependence_satisfied(depend_t *depend) +{ + abstract_pkg_t *apkg = depend->pkg; + abstract_pkg_vec_t *provider_apkgs = apkg->provided_by; + int n_providers = provider_apkgs->len; + abstract_pkg_t **apkgs = provider_apkgs->pkgs; + int i; + int n_pkgs; + int j; + + for (i = 0; i < n_providers; i++) { + abstract_pkg_t *papkg = apkgs[i]; + pkg_vec_t *pkg_vec = papkg->pkgs; + if (pkg_vec) { + n_pkgs = pkg_vec->len; + for (j = 0; j < n_pkgs; j++) { + pkg_t *pkg = pkg_vec->pkgs[j]; + if (version_constraints_satisfied(depend, pkg)) { + if (pkg->state_status == SS_INSTALLED || pkg->state_status == SS_UNPACKED) + return 1; + } + } + } + } + return 0; +} + +static int is_pkg_in_pkg_vec(pkg_vec_t * vec, pkg_t * pkg) +{ + int i; + pkg_t ** pkgs = vec->pkgs; + + for(i = 0; i < vec->len; i++) + if((strcmp(pkg->name, (*(pkgs + i))->name) == 0) + && (pkg_compare_versions(pkg, *(pkgs + i)) == 0) + && (strcmp(pkg->architecture, (*(pkgs + i))->architecture) == 0)) + return 1; + return 0; +} + +/** + * pkg_replaces returns 1 if pkg->replaces contains one of replacee's provides and 0 + * otherwise. + */ +int pkg_replaces(pkg_t *pkg, pkg_t *replacee) +{ + abstract_pkg_t **replaces = pkg->replaces; + int replaces_count = pkg->replaces_count; + int replacee_provides_count = replacee->provides_count; + int i, j; + for (i = 0; i < replaces_count; i++) { + abstract_pkg_t *abstract_replacee = replaces[i]; + for (j = 0; j < replacee_provides_count; j++) { + if (replacee->provides[j] == abstract_replacee) + return 1; + } + } + return 0; +} + + +/** + * pkg_conflicts_abstract returns 1 if pkg->conflicts contains conflictee and 0 + * otherwise. + */ +int pkg_conflicts_abstract(pkg_t *pkg, abstract_pkg_t *conflictee) +{ + compound_depend_t *conflicts = pkg->conflicts; + int conflicts_count = pkg->conflicts_count; + int i, j; + for (i = 0; i < conflicts_count; i++) { + int possibility_count = conflicts[i].possibility_count; + struct depend **possibilities = conflicts[i].possibilities; + for (j = 0; j < possibility_count; j++) { + if (possibilities[j]->pkg == conflictee) { + return 1; + } + } + } + return 0; +} + +/** + * pkg_conflicts returns 1 if pkg->conflicts contains one of + * conflictee's provides and 0 otherwise. + */ +int pkg_conflicts(pkg_t *pkg, pkg_t *conflictee) +{ + compound_depend_t *conflicts = pkg->conflicts; + int conflicts_count = pkg->conflicts_count; + abstract_pkg_t **conflictee_provides = conflictee->provides; + int conflictee_provides_count = conflictee->provides_count; + int i, j, k; + int possibility_count; + struct depend **possibilities; + abstract_pkg_t *possibility ; + + for (i = 0; i < conflicts_count; i++) { + possibility_count = conflicts[i].possibility_count; + possibilities = conflicts[i].possibilities; + for (j = 0; j < possibility_count; j++) { + possibility = possibilities[j]->pkg; + for (k = 0; k < conflictee_provides_count; k++) { + if (possibility == conflictee_provides[k]) { + return 1; + } + } + } + } + return 0; +} + +static char ** merge_unresolved(char ** oldstuff, char ** newstuff) +{ + int oldlen = 0, newlen = 0; + char ** result; + int i, j; + + if(!newstuff) + return oldstuff; + + while(oldstuff && oldstuff[oldlen]) oldlen++; + while(newstuff && newstuff[newlen]) newlen++; + + result = xrealloc(oldstuff, sizeof(char *) * (oldlen + newlen + 1)); + + for(i = oldlen, j = 0; i < (oldlen + newlen); i++, j++) + *(result + i) = *(newstuff + j); + + *(result + i) = NULL; + + return result; +} + +/* + * a kinda kludgy way to back out depends str from two different arrays (reg'l'r 'n pre) + * this is null terminated, no count is carried around + */ +char ** add_unresolved_dep(pkg_t * pkg, char ** the_lost, int ref_ndx) +{ + int count; + char ** resized; + + count = 0; + while(the_lost && the_lost[count]) count++; + + count++; /* need one to hold the null */ + resized = xrealloc(the_lost, sizeof(char *) * (count + 1)); + resized[count - 1] = pkg_depend_str(pkg, ref_ndx); + resized[count] = NULL; + + return resized; +} + +void buildProvides(abstract_pkg_t * ab_pkg, pkg_t * pkg) +{ + int i; + + /* every pkg provides itself */ + pkg->provides_count++; + abstract_pkg_vec_insert(ab_pkg->provided_by, ab_pkg); + pkg->provides = xcalloc(pkg->provides_count, sizeof(abstract_pkg_t *)); + pkg->provides[0] = ab_pkg; + + for (i=1; i<pkg->provides_count; i++) { + abstract_pkg_t *provided_abpkg = ensure_abstract_pkg_by_name( + pkg->provides_str[i-1]); + free(pkg->provides_str[i-1]); + + pkg->provides[i] = provided_abpkg; + + abstract_pkg_vec_insert(provided_abpkg->provided_by, ab_pkg); + } + if (pkg->provides_str) + free(pkg->provides_str); +} + +void buildConflicts(pkg_t * pkg) +{ + int i; + compound_depend_t * conflicts; + + if (!pkg->conflicts_count) + return; + + conflicts = pkg->conflicts = xcalloc(pkg->conflicts_count, sizeof(compound_depend_t)); + for (i = 0; i < pkg->conflicts_count; i++) { + conflicts->type = CONFLICTS; + parseDepends(conflicts, pkg->conflicts_str[i]); + free(pkg->conflicts_str[i]); + conflicts++; + } + if (pkg->conflicts_str) + free(pkg->conflicts_str); +} + +void buildReplaces(abstract_pkg_t * ab_pkg, pkg_t * pkg) +{ + int i; + + if (!pkg->replaces_count) + return; + + pkg->replaces = xcalloc(pkg->replaces_count, sizeof(abstract_pkg_t *)); + + for(i = 0; i < pkg->replaces_count; i++){ + abstract_pkg_t *old_abpkg = ensure_abstract_pkg_by_name(pkg->replaces_str[i]); + + pkg->replaces[i] = old_abpkg; + free(pkg->replaces_str[i]); + + if (!old_abpkg->replaced_by) + old_abpkg->replaced_by = abstract_pkg_vec_alloc(); + /* if a package pkg both replaces and conflicts old_abpkg, + * then add it to the replaced_by vector so that old_abpkg + * will be upgraded to ab_pkg automatically */ + if (pkg_conflicts_abstract(pkg, old_abpkg)) + abstract_pkg_vec_insert(old_abpkg->replaced_by, ab_pkg); + } + + if (pkg->replaces_str) + free(pkg->replaces_str); +} + +void buildDepends(pkg_t * pkg) +{ + unsigned int count; + int i; + compound_depend_t * depends; + + if(!(count = pkg->pre_depends_count + pkg->depends_count + pkg->recommends_count + pkg->suggests_count)) + return; + + depends = pkg->depends = xcalloc(count, sizeof(compound_depend_t)); + + for(i = 0; i < pkg->pre_depends_count; i++){ + parseDepends(depends, pkg->pre_depends_str[i]); + free(pkg->pre_depends_str[i]); + depends->type = PREDEPEND; + depends++; + } + if (pkg->pre_depends_str) + free(pkg->pre_depends_str); + + for(i = 0; i < pkg->depends_count; i++){ + parseDepends(depends, pkg->depends_str[i]); + free(pkg->depends_str[i]); + depends++; + } + if (pkg->depends_str) + free(pkg->depends_str); + + for(i = 0; i < pkg->recommends_count; i++){ + parseDepends(depends, pkg->recommends_str[i]); + free(pkg->recommends_str[i]); + depends->type = RECOMMEND; + depends++; + } + if(pkg->recommends_str) + free(pkg->recommends_str); + + for(i = 0; i < pkg->suggests_count; i++){ + parseDepends(depends, pkg->suggests_str[i]); + free(pkg->suggests_str[i]); + depends->type = SUGGEST; + depends++; + } + if(pkg->suggests_str) + free(pkg->suggests_str); +} + +const char* +constraint_to_str(enum version_constraint c) +{ + switch (c) { + case NONE: + return ""; + case EARLIER: + return "< "; + case EARLIER_EQUAL: + return "<= "; + case EQUAL: + return "= "; + case LATER_EQUAL: + return ">= "; + case LATER: + return "> "; + } + + return ""; +} + +/* + * Returns a printable string for pkg's dependency at the specified idx. The + * resultant string must be passed to free() by the caller. + */ +char * +pkg_depend_str(pkg_t *pkg, int idx) +{ + int i; + unsigned int len; + char *str; + compound_depend_t *cdep; + depend_t *dep; + + len = 0; + cdep = &pkg->depends[idx]; + + /* calculate string length */ + for (i=0; i<cdep->possibility_count; i++) { + dep = cdep->possibilities[i]; + + if (i != 0) + len += 3; /* space, pipe, space */ + + len += strlen(dep->pkg->name); + + if (dep->version) { + len += 2; /* space, left parenthesis */ + len += 3; /* constraint string (<=, >=, etc), space */ + len += strlen(dep->version); + len += 1; /* right parenthesis */ + } + } + + str = xmalloc(len + 1); /* +1 for the NULL terminator */ + str[0] = '\0'; + + for (i=0; i<cdep->possibility_count; i++) { + dep = cdep->possibilities[i]; + + if (i != 0) + strncat(str, " | ", len); + + strncat(str, dep->pkg->name, len); + + if (dep->version) { + strncat(str, " (", len); + strncat(str, constraint_to_str(dep->constraint), len); + strncat(str, dep->version, len); + strncat(str, ")", len); + } + } + + return str; +} + +void buildDependedUponBy(pkg_t * pkg, abstract_pkg_t * ab_pkg) +{ + compound_depend_t * depends; + int count, othercount; + int i, j; + abstract_pkg_t * ab_depend; + abstract_pkg_t ** temp; + + count = pkg->pre_depends_count + + pkg->depends_count + + pkg->recommends_count + + pkg->suggests_count; + + for (i = 0; i < count; i++) { + depends = &pkg->depends[i]; + if (depends->type != PREDEPEND + && depends->type != DEPEND + && depends->type != RECOMMEND) + continue; + for (j = 0; j < depends->possibility_count; j++) { + ab_depend = depends->possibilities[j]->pkg; + if (!ab_depend->depended_upon_by) { + ab_depend->depended_upon_by = + xcalloc(1, sizeof(abstract_pkg_t *)); + } + + temp = ab_depend->depended_upon_by; + othercount = 1; + while (*temp) { + temp++; + othercount++; + } + *temp = ab_pkg; + + ab_depend->depended_upon_by = + xrealloc(ab_depend->depended_upon_by, + (othercount + 1) * sizeof(abstract_pkg_t *)); + + /* the array may have been moved by realloc */ + temp = ab_depend->depended_upon_by + othercount; + *temp = NULL; + } + } +} + +static depend_t * depend_init(void) +{ + depend_t * d = xcalloc(1, sizeof(depend_t)); + d->constraint = NONE; + d->version = NULL; + d->pkg = NULL; + + return d; +} + +static int parseDepends(compound_depend_t *compound_depend, + char * depend_str) +{ + char * pkg_name, buffer[2048]; + unsigned int num_of_ors = 0; + int i; + char * src, * dest; + depend_t ** possibilities; + + /* first count the number of ored possibilities for satisfying dependency */ + src = depend_str; + while(*src) + if(*src++ == '|') + num_of_ors++; + + compound_depend->type = DEPEND; + + compound_depend->possibility_count = num_of_ors + 1; + possibilities = xcalloc((num_of_ors + 1), sizeof(depend_t *) ); + compound_depend->possibilities = possibilities; + + src = depend_str; + for(i = 0; i < num_of_ors + 1; i++){ + possibilities[i] = depend_init(); + /* gobble up just the name first */ + dest = buffer; + while(*src && + !isspace(*src) && + (*src != '(') && + (*src != '*') && + (*src != '|')) + *dest++ = *src++; + *dest = '\0'; + pkg_name = trim_xstrdup(buffer); + + /* now look at possible version info */ + + /* skip to next chars */ + if(isspace(*src)) + while(*src && isspace(*src)) src++; + + /* extract constraint and version */ + if(*src == '('){ + src++; + if(!strncmp(src, "<<", 2)){ + possibilities[i]->constraint = EARLIER; + src += 2; + } + else if(!strncmp(src, "<=", 2)){ + possibilities[i]->constraint = EARLIER_EQUAL; + src += 2; + } + else if(!strncmp(src, ">=", 2)){ + possibilities[i]->constraint = LATER_EQUAL; + src += 2; + } + else if(!strncmp(src, ">>", 2)){ + possibilities[i]->constraint = LATER; + src += 2; + } + else if(!strncmp(src, "=", 1)){ + possibilities[i]->constraint = EQUAL; + src++; + } + /* should these be here to support deprecated designations; dpkg does */ + else if(!strncmp(src, "<", 1)){ + possibilities[i]->constraint = EARLIER_EQUAL; + src++; + } + else if(!strncmp(src, ">", 1)){ + possibilities[i]->constraint = LATER_EQUAL; + src++; + } + + /* now we have any constraint, pass space to version string */ + while(isspace(*src)) src++; + + /* this would be the version string */ + dest = buffer; + while(*src && *src != ')') + *dest++ = *src++; + *dest = '\0'; + + possibilities[i]->version = trim_xstrdup(buffer); + } + /* hook up the dependency to its abstract pkg */ + possibilities[i]->pkg = ensure_abstract_pkg_by_name(pkg_name); + + free(pkg_name); + + /* now get past the ) and any possible | chars */ + while(*src && + (isspace(*src) || + (*src == ')') || + (*src == '|'))) + src++; + if (*src == '*') + { + compound_depend->type = GREEDY_DEPEND; + src++; + } + } + + return 0; +} |