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createrepo_c
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createrepo_c
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src/xml_parser_repomd.c
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Aleš Matěj
Internally use package_internal.h to access cr_package fields
26 июн 2026, 17:40
26 июн 2026, 17:40
3a39893
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/* createrepo_c - Library of routines for manipulation with repodata * Copyright (C) 2013 Tomas Mlcoch * * 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 * of the License, 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, * USA. */ #include <glib.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <assert.h> #include <errno.h> #include "xml_parser_internal.h" #include "xml_parser.h" #include "error.h" #include "package_internal.h" #include "misc.h" #define ERR_DOMAIN CREATEREPO_C_ERROR #define ERR_CODE_XML CRE_BADXMLREPOMD typedef enum { STATE_START, STATE_REPOMD, STATE_REVISION, STATE_REPOID, STATE_CONTENTHASH, STATE_TAGS, STATE_REPO, STATE_CONTENT, STATE_DISTRO, STATE_DATA, STATE_LOCATION, STATE_CHECKSUM, STATE_OPENCHECKSUM, STATE_HEADERCHECKSUM, STATE_TIMESTAMP, STATE_SIZE, STATE_OPENSIZE, STATE_HEADERSIZE, STATE_DBVERSION, NUMSTATES } cr_RepomdState; /* NOTE: Same states in the first column must be together!!! * Performance tip: More frequent elements should be listed * first in its group (eg: element "package" (STATE_PACKAGE) * has a "file" element listed first, because it is more frequent * than a "version" element). */ static cr_StatesSwitch stateswitches[] = { { STATE_START, "repomd", STATE_REPOMD, 0 }, { STATE_REPOMD, "revision", STATE_REVISION, 1 }, { STATE_REPOMD, "repoid", STATE_REPOID, 1 }, { STATE_REPOMD, "contenthash", STATE_CONTENTHASH, 1 }, { STATE_REPOMD, "tags", STATE_TAGS, 0 }, { STATE_REPOMD, "data", STATE_DATA, 0 }, { STATE_TAGS, "repo", STATE_REPO, 1 }, { STATE_TAGS, "content", STATE_CONTENT, 1 }, { STATE_TAGS, "distro", STATE_DISTRO, 1 }, { STATE_DATA, "location", STATE_LOCATION, 0 }, { STATE_DATA, "checksum", STATE_CHECKSUM, 1 }, { STATE_DATA, "open-checksum", STATE_OPENCHECKSUM, 1 }, { STATE_DATA, "header-checksum", STATE_HEADERCHECKSUM, 1 }, { STATE_DATA, "timestamp", STATE_TIMESTAMP, 1 }, { STATE_DATA, "size", STATE_SIZE, 1 }, { STATE_DATA, "open-size", STATE_OPENSIZE, 1 }, { STATE_DATA, "header-size", STATE_HEADERSIZE, 1 }, { STATE_DATA, "database_version", STATE_DBVERSION, 1 }, { NUMSTATES, NULL, NUMSTATES, 0 } }; static void cr_start_handler(void *pdata, const xmlChar *element, const xmlChar **attr) { cr_ParserData *pd = pdata; cr_StatesSwitch *sw; if (pd->err) return; // There was an error -> do nothing if (pd->depth != pd->statedepth) { // We are inside of unknown element pd->depth++; return; } pd->depth++; if (!pd->swtab[pd->state]) { // Current element should not have any sub elements return; } // Find current state by its name for (sw = pd->swtab[pd->state]; sw->from == pd->state; sw++) if (!strcmp((char *) element, sw->ename)) break; if (sw->from != pd->state) { // No state for current element (unknown element) cr_xml_parser_warning(pd, CR_XML_WARNING_UNKNOWNTAG, "Unknown element \"%s\"", element); return; } gboolean free_attr = FALSE; attr = unescape_ampersand_from_values(attr, &free_attr); // Update parser data pd->state = sw->to; pd->docontent = sw->docontent; pd->statedepth = pd->depth; pd->lcontent = 0; pd->content[0] = '\0'; const char *val; switch(pd->state) { case STATE_START: break; case STATE_REPOMD: pd->main_tag_found = TRUE; break; case STATE_REVISION: case STATE_TAGS: case STATE_REPO: case STATE_CONTENT: break; case STATE_REPOID: assert(pd->repomd); assert(!pd->repomdrecord); val = cr_find_attr("type", attr); if (val) pd->repomd->repoid_type = g_string_chunk_insert(pd->repomd->chunk, val); break; case STATE_CONTENTHASH: assert(pd->repomd); assert(!pd->repomdrecord); val = cr_find_attr("type", attr); if (val) pd->repomd->contenthash_type = g_string_chunk_insert( pd->repomd->chunk, val); break; case STATE_DISTRO: assert(pd->repomd); assert(!pd->repomdrecord); val = cr_find_attr("cpeid", attr); if (val) pd->cpeid = g_strdup(val); break; case STATE_DATA: assert(pd->repomd); assert(!pd->repomdrecord); val = cr_find_attr("type", attr); if (!val) { cr_xml_parser_warning(pd, CR_XML_WARNING_MISSINGATTR, "Missing attribute \"type\" of a data element"); val = "unknown"; } pd->repomdrecord = cr_repomd_record_new(val, NULL); cr_repomd_set_record(pd->repomd, pd->repomdrecord); break; case STATE_LOCATION: assert(pd->repomd); assert(pd->repomdrecord); val = cr_find_attr("href", attr); if (val) pd->repomdrecord->location_href = g_string_chunk_insert( pd->repomdrecord->chunk, val); else cr_xml_parser_warning(pd, CR_XML_WARNING_MISSINGATTR, "Missing attribute \"href\" of a location element"); val = cr_find_attr("xml:base", attr); if (val) pd->repomdrecord->location_base = g_string_chunk_insert( pd->repomdrecord->chunk, val); break; case STATE_CHECKSUM: assert(pd->repomd); assert(pd->repomdrecord); val = cr_find_attr("type", attr); if (!val) { cr_xml_parser_warning(pd, CR_XML_WARNING_MISSINGATTR, "Missing attribute \"type\" of a checksum element"); break; } pd->repomdrecord->checksum_type = g_string_chunk_insert( pd->repomdrecord->chunk, val); break; case STATE_OPENCHECKSUM: assert(pd->repomd); assert(pd->repomdrecord); val = cr_find_attr("type", attr); if (!val) { cr_xml_parser_warning(pd, CR_XML_WARNING_MISSINGATTR, "Missing attribute \"type\" of an open checksum element"); break; } pd->repomdrecord->checksum_open_type = g_string_chunk_insert( pd->repomdrecord->chunk, val); break; case STATE_HEADERCHECKSUM: assert(pd->repomd); assert(pd->repomdrecord); val = cr_find_attr("type", attr); if (!val) { cr_xml_parser_warning(pd, CR_XML_WARNING_MISSINGATTR, "Missing attribute \"type\" of a header checksum element"); break; } pd->repomdrecord->checksum_header_type = g_string_chunk_insert( pd->repomdrecord->chunk, val); break; case STATE_TIMESTAMP: case STATE_SIZE: case STATE_OPENSIZE: case STATE_HEADERSIZE: case STATE_DBVERSION: default: break; } if (free_attr) { g_strfreev((char **)attr); } } static void cr_end_handler(void *pdata, G_GNUC_UNUSED const xmlChar *element) { cr_ParserData *pd = pdata; unsigned int state = pd->state; if (pd->err) return; // There was an error -> do nothing if (pd->depth != pd->statedepth) { // Back from the unknown state pd->depth--; return; } pd->depth--; pd->statedepth--; pd->state = pd->sbtab[pd->state]; pd->docontent = 0; switch (state) { case STATE_START: case STATE_REPOMD: break; case STATE_REVISION: assert(pd->repomd); assert(!pd->repomdrecord); if (pd->lcontent == 0) { cr_xml_parser_warning(pd, CR_XML_WARNING_MISSINGVAL, "Missing value of a revision element"); break; } cr_repomd_set_revision(pd->repomd, pd->content); break; case STATE_REPOID: assert(pd->repomd); assert(!pd->repomdrecord); pd->repomd->repoid = g_string_chunk_insert(pd->repomd->chunk, pd->content); break; case STATE_CONTENTHASH: assert(pd->repomd); assert(!pd->repomdrecord); pd->repomd->contenthash = g_string_chunk_insert(pd->repomd->chunk, pd->content); break; case STATE_TAGS: break; case STATE_REPO: assert(pd->repomd); assert(!pd->repomdrecord); cr_repomd_add_repo_tag(pd->repomd, pd->content); break; case STATE_CONTENT: assert(pd->repomd); assert(!pd->repomdrecord); cr_repomd_add_content_tag(pd->repomd, pd->content); break; case STATE_DISTRO: assert(pd->repomd); assert(!pd->repomdrecord); cr_repomd_add_distro_tag(pd->repomd, pd->cpeid, pd->content); if (pd->cpeid) { g_free(pd->cpeid); pd->cpeid = NULL; } break; case STATE_DATA: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord = NULL; break; case STATE_LOCATION: break; case STATE_CHECKSUM: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->checksum = cr_safe_string_chunk_insert( pd->repomdrecord->chunk, pd->content); break; case STATE_OPENCHECKSUM: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->checksum_open = cr_safe_string_chunk_insert( pd->repomdrecord->chunk, pd->content); break; case STATE_HEADERCHECKSUM: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->checksum_header = cr_safe_string_chunk_insert( pd->repomdrecord->chunk, pd->content); break; case STATE_TIMESTAMP: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->timestamp = cr_xml_parser_strtoll(pd, pd->content, 0); break; case STATE_SIZE: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->size = cr_xml_parser_strtoll(pd, pd->content, 0); break; case STATE_OPENSIZE: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->size_open = cr_xml_parser_strtoll(pd, pd->content, 0); break; case STATE_HEADERSIZE: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->size_header = cr_xml_parser_strtoll(pd, pd->content, 0); break; case STATE_DBVERSION: assert(pd->repomd); assert(pd->repomdrecord); pd->repomdrecord->db_ver = (int) cr_xml_parser_strtoll(pd, pd->content, 0); break; default: break; } } int cr_xml_parse_repomd(const char *path, cr_Repomd *repomd, cr_XmlParserWarningCb warningcb, void *warningcb_data, GError **err) { int ret = CRE_OK; cr_ParserData *pd; GError *tmp_err = NULL; assert(path); assert(repomd); assert(!err || *err == NULL); // Init xmlSAXHandler sax; memset(&sax, 0, sizeof(sax)); sax.startElement = cr_start_handler; sax.endElement = cr_end_handler; sax.characters = cr_char_handler; pd = cr_xml_parser_data(NUMSTATES); xmlParserCtxtPtr parser; parser = xmlCreatePushParserCtxt(&sax, pd, NULL, 0, NULL); pd->parser = parser; pd->state = STATE_START; pd->repomd = repomd; pd->warningcb = warningcb; pd->warningcb_data = warningcb_data; for (cr_StatesSwitch *sw = stateswitches; sw->from != NUMSTATES; sw++) { if (!pd->swtab[sw->from]) pd->swtab[sw->from] = sw; pd->sbtab[sw->to] = sw->from; } // Parsing ret = cr_xml_parser_generic(parser, pd, path, &tmp_err); if (tmp_err) g_propagate_error(err, tmp_err); // Warning if file was probably a different type than expected if (!pd->main_tag_found && ret == CRE_OK) cr_xml_parser_warning(pd, CR_XML_WARNING_BADMDTYPE, "The file don't contain the expected element " "\"<repomd>\" - The file probably isn't " "a valid repomd.xml"); // Clean up cr_xml_parser_data_free(pd); return ret; }