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1004 lines
28 KiB
1004 lines
28 KiB
2 months ago
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/*
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* UCW Library -- A simple XML parser
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*
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* (c) 2007--2008 Pavel Charvat <pchar@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU Lesser General Public License.
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*/
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#undef LOCAL_DEBUG
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#include <ucw/lib.h>
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#include <ucw-xml/xml.h>
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#include <ucw-xml/dtd.h>
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#include <ucw-xml/internals.h>
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#include <ucw/fastbuf.h>
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#include <ucw/ff-unicode.h>
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#include <ucw/unicode.h>
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/* Notations */
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#define HASH_PREFIX(x) xml_dtd_notns_##x
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#define HASH_NODE struct xml_dtd_notn
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#define HASH_KEY_STRING name
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#define HASH_ZERO_FILL
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#define HASH_TABLE_DYNAMIC
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#define HASH_WANT_LOOKUP
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#define HASH_WANT_FIND
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#define HASH_GIVE_ALLOC
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#define HASH_TABLE_ALLOC
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XML_HASH_GIVE_ALLOC
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#include <ucw/hashtable.h>
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struct xml_dtd_notn *
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xml_dtd_find_notn(struct xml_context *ctx, char *name)
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{
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struct xml_dtd *dtd = ctx->dtd;
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struct xml_dtd_notn *notn = xml_dtd_notns_find(dtd->tab_notns, name);
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return !notn ? NULL : (notn->flags & XML_DTD_NOTN_DECLARED) ? notn : NULL;
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}
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/* General entities */
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#define HASH_PREFIX(x) xml_dtd_ents_##x
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#define HASH_NODE struct xml_dtd_entity
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#define HASH_KEY_STRING name
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#define HASH_ZERO_FILL
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#define HASH_TABLE_DYNAMIC
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#define HASH_WANT_FIND
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#define HASH_WANT_LOOKUP
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#define HASH_GIVE_ALLOC
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#define HASH_TABLE_ALLOC
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XML_HASH_GIVE_ALLOC
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#include <ucw/hashtable.h>
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static struct xml_dtd_entity *
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xml_dtd_declare_trivial_entity(struct xml_context *ctx, char *name, char *text)
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{
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struct xml_dtd *dtd = ctx->dtd;
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struct xml_dtd_entity *ent = xml_dtd_ents_lookup(dtd->tab_ents, name);
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if (ent->flags & XML_DTD_ENTITY_DECLARED)
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{
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xml_warn(ctx, "Entity &%s; already declared", name);
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return NULL;
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}
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slist_add_tail(&dtd->ents, &ent->n);
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ent->flags = XML_DTD_ENTITY_DECLARED | XML_DTD_ENTITY_TRIVIAL;
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ent->text = text;
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return ent;
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}
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static void
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xml_dtd_declare_default_entities(struct xml_context *ctx)
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{
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xml_dtd_declare_trivial_entity(ctx, "lt", "<");
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xml_dtd_declare_trivial_entity(ctx, "gt", ">");
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xml_dtd_declare_trivial_entity(ctx, "amp", "&");
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xml_dtd_declare_trivial_entity(ctx, "apos", "'");
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xml_dtd_declare_trivial_entity(ctx, "quot", "\"");
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}
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struct xml_dtd_entity *
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xml_def_find_entity(struct xml_context *ctx UNUSED, char *name)
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{
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#define ENT(n, t) ent_##n = { .name = #n, .text = t, .flags = XML_DTD_ENTITY_DECLARED | XML_DTD_ENTITY_TRIVIAL }
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static struct xml_dtd_entity ENT(lt, "<"), ENT(gt, ">"), ENT(amp, "&"), ENT(apos, "'"), ENT(quot, "\"");
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#undef ENT
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switch (name[0])
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{
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case 'l':
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if (!strcmp(name, "lt"))
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return &ent_lt;
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break;
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case 'g':
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if (!strcmp(name, "gt"))
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return &ent_gt;
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break;
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case 'a':
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if (!strcmp(name, "amp"))
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return &ent_amp;
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if (!strcmp(name, "apos"))
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return &ent_apos;
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break;
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case 'q':
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if (!strcmp(name, "quot"))
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return &ent_quot;
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break;
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}
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return NULL;
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}
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struct xml_dtd_entity *
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xml_dtd_find_entity(struct xml_context *ctx, char *name)
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{
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struct xml_dtd *dtd = ctx->dtd;
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if (ctx->h_find_entity)
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return ctx->h_find_entity(ctx, name);
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else if (dtd)
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{
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struct xml_dtd_entity *ent = xml_dtd_ents_find(dtd->tab_ents, name);
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return !ent ? NULL : (ent->flags & XML_DTD_ENTITY_DECLARED) ? ent : NULL;
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}
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else
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return xml_def_find_entity(ctx, name);
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}
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/* Parameter entities */
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static struct xml_dtd_entity *
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xml_dtd_find_pentity(struct xml_context *ctx, char *name)
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{
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struct xml_dtd *dtd = ctx->dtd;
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struct xml_dtd_entity *ent = xml_dtd_ents_find(dtd->tab_pents, name);
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return !ent ? NULL : (ent->flags & XML_DTD_ENTITY_DECLARED) ? ent : NULL;
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}
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/* Elements */
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struct xml_dtd_elems_table;
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static void
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xml_dtd_elems_init_data(struct xml_dtd_elems_table *tab UNUSED, struct xml_dtd_elem *e)
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{
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slist_init(&e->attrs);
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}
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#define HASH_PREFIX(x) xml_dtd_elems_##x
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#define HASH_NODE struct xml_dtd_elem
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#define HASH_KEY_STRING name
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#define HASH_TABLE_DYNAMIC
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#define HASH_ZERO_FILL
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#define HASH_WANT_FIND
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#define HASH_WANT_LOOKUP
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#define HASH_GIVE_ALLOC
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#define HASH_GIVE_INIT_DATA
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#define HASH_TABLE_ALLOC
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XML_HASH_GIVE_ALLOC
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#include <ucw/hashtable.h>
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struct xml_dtd_elem *
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xml_dtd_find_elem(struct xml_context *ctx, char *name)
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{
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return ctx->dtd ? xml_dtd_elems_find(ctx->dtd->tab_elems, name) : NULL;
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}
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/* Element sons */
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struct xml_dtd_enodes_table;
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static inline uint
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xml_dtd_enodes_hash(struct xml_dtd_enodes_table *tab UNUSED, struct xml_dtd_elem_node *parent, struct xml_dtd_elem *elem)
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{
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return hash_pointer(parent) ^ hash_pointer(elem);
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}
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static inline int
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xml_dtd_enodes_eq(struct xml_dtd_enodes_table *tab UNUSED, struct xml_dtd_elem_node *parent1, struct xml_dtd_elem *elem1, struct xml_dtd_elem_node *parent2, struct xml_dtd_elem *elem2)
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{
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return (parent1 == parent2) && (elem1 == elem2);
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}
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static inline void
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xml_dtd_enodes_init_key(struct xml_dtd_enodes_table *tab UNUSED, struct xml_dtd_elem_node *node, struct xml_dtd_elem_node *parent, struct xml_dtd_elem *elem)
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{
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node->parent = parent;
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node->elem = elem;
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}
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#define HASH_PREFIX(x) xml_dtd_enodes_##x
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#define HASH_NODE struct xml_dtd_elem_node
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#define HASH_KEY_COMPLEX(x) x parent, x elem
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#define HASH_KEY_DECL struct xml_dtd_elem_node *parent, struct xml_dtd_elem *elem
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#define HASH_GIVE_HASHFN
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#define HASH_GIVE_EQ
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#define HASH_GIVE_INIT_KEY
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#define HASH_TABLE_DYNAMIC
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#define HASH_ZERO_FILL
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#define HASH_WANT_FIND
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#define HASH_WANT_NEW
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#define HASH_GIVE_ALLOC
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#define HASH_TABLE_ALLOC
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XML_HASH_GIVE_ALLOC
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#include <ucw/hashtable.h>
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/* Element attributes */
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struct xml_dtd_attrs_table;
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static inline uint
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xml_dtd_attrs_hash(struct xml_dtd_attrs_table *tab UNUSED, struct xml_dtd_elem *elem, char *name)
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{
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return hash_pointer(elem) ^ hash_string(name);
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}
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static inline int
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xml_dtd_attrs_eq(struct xml_dtd_attrs_table *tab UNUSED, struct xml_dtd_elem *elem1, char *name1, struct xml_dtd_elem *elem2, char *name2)
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{
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return (elem1 == elem2) && !strcmp(name1, name2);
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}
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static void
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xml_dtd_attrs_init_key(struct xml_dtd_attrs_table *tab UNUSED, struct xml_dtd_attr *attr, struct xml_dtd_elem *elem, char *name)
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{
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attr->elem = elem;
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attr->name = name;
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slist_add_tail(&elem->attrs, &attr->n);
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}
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#define HASH_PREFIX(x) xml_dtd_attrs_##x
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#define HASH_NODE struct xml_dtd_attr
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#define HASH_ZERO_FILL
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#define HASH_TABLE_DYNAMIC
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#define HASH_KEY_COMPLEX(x) x elem, x name
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#define HASH_KEY_DECL struct xml_dtd_elem *elem, char *name
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#define HASH_GIVE_HASHFN
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#define HASH_GIVE_EQ
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#define HASH_GIVE_INIT_KEY
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#define HASH_WANT_FIND
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#define HASH_WANT_NEW
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#define HASH_GIVE_ALLOC
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#define HASH_TABLE_ALLOC
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XML_HASH_GIVE_ALLOC
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#include <ucw/hashtable.h>
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struct xml_dtd_attr *
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xml_dtd_find_attr(struct xml_context *ctx, struct xml_dtd_elem *elem, char *name)
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{
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return ctx->dtd ? xml_dtd_attrs_find(ctx->dtd->tab_attrs, elem, name) : NULL;
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}
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/* Enumerated attribute values */
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struct xml_dtd_evals_table;
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static inline uint
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xml_dtd_evals_hash(struct xml_dtd_evals_table *tab UNUSED, struct xml_dtd_attr *attr, char *val)
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{
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return hash_pointer(attr) ^ hash_string(val);
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}
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static inline int
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xml_dtd_evals_eq(struct xml_dtd_evals_table *tab UNUSED, struct xml_dtd_attr *attr1, char *val1, struct xml_dtd_attr *attr2, char *val2)
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{
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return (attr1 == attr2) && !strcmp(val1, val2);
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}
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static inline void
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xml_dtd_evals_init_key(struct xml_dtd_evals_table *tab UNUSED, struct xml_dtd_eval *eval, struct xml_dtd_attr *attr, char *val)
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{
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eval->attr = attr;
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eval->val = val;
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}
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#define HASH_PREFIX(x) xml_dtd_evals_##x
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#define HASH_NODE struct xml_dtd_eval
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#define HASH_TABLE_DYNAMIC
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#define HASH_KEY_COMPLEX(x) x attr, x val
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#define HASH_KEY_DECL struct xml_dtd_attr *attr, char *val
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#define HASH_GIVE_HASHFN
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#define HASH_GIVE_EQ
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#define HASH_GIVE_INIT_KEY
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#define HASH_WANT_FIND
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#define HASH_WANT_NEW
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#define HASH_GIVE_ALLOC
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#define HASH_TABLE_ALLOC
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XML_HASH_GIVE_ALLOC
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#include <ucw/hashtable.h>
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/* Enumerated attribute notations */
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struct xml_dtd_enotns_table;
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static inline uint
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xml_dtd_enotns_hash(struct xml_dtd_enotns_table *tab UNUSED, struct xml_dtd_attr *attr, struct xml_dtd_notn *notn)
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{
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return hash_pointer(attr) ^ hash_pointer(notn);
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}
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static inline int
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xml_dtd_enotns_eq(struct xml_dtd_enotns_table *tab UNUSED, struct xml_dtd_attr *attr1, struct xml_dtd_notn *notn1, struct xml_dtd_attr *attr2, struct xml_dtd_notn *notn2)
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{
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return (attr1 == attr2) && (notn1 == notn2);
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}
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static void
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xml_dtd_enotns_init_key(struct xml_dtd_enotns_table *tab UNUSED, struct xml_dtd_enotn *enotn, struct xml_dtd_attr *attr, struct xml_dtd_notn *notn)
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{
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enotn->attr = attr;
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enotn->notn = notn;
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}
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#define HASH_PREFIX(x) xml_dtd_enotns_##x
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#define HASH_NODE struct xml_dtd_enotn
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#define HASH_TABLE_DYNAMIC
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#define HASH_KEY_COMPLEX(x) x attr, x notn
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#define HASH_KEY_DECL struct xml_dtd_attr *attr, struct xml_dtd_notn *notn
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#define HASH_GIVE_HASHFN
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#define HASH_GIVE_EQ
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#define HASH_GIVE_INIT_KEY
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#define HASH_WANT_FIND
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#define HASH_WANT_NEW
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#define HASH_GIVE_ALLOC
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#define HASH_TABLE_ALLOC
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XML_HASH_GIVE_ALLOC
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#include <ucw/hashtable.h>
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/* DTD initialization/cleanup */
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void
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xml_dtd_init(struct xml_context *ctx)
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{
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if (ctx->dtd)
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return;
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struct mempool *pool = mp_new(4096);
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struct xml_dtd *dtd = ctx->dtd = mp_alloc_zero(pool, sizeof(*ctx->dtd));
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dtd->pool = pool;
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xml_dtd_ents_init(dtd->tab_ents = xml_hash_new(pool, sizeof(struct xml_dtd_ents_table)));
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xml_dtd_ents_init(dtd->tab_pents = xml_hash_new(pool, sizeof(struct xml_dtd_ents_table)));
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xml_dtd_notns_init(dtd->tab_notns = xml_hash_new(pool, sizeof(struct xml_dtd_notns_table)));
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xml_dtd_elems_init(dtd->tab_elems = xml_hash_new(pool, sizeof(struct xml_dtd_elems_table)));
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xml_dtd_enodes_init(dtd->tab_enodes = xml_hash_new(pool, sizeof(struct xml_dtd_enodes_table)));
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|
|
xml_dtd_attrs_init(dtd->tab_attrs = xml_hash_new(pool, sizeof(struct xml_dtd_attrs_table)));
|
||
|
|
xml_dtd_evals_init(dtd->tab_evals = xml_hash_new(pool, sizeof(struct xml_dtd_evals_table)));
|
||
|
|
xml_dtd_enotns_init(dtd->tab_enotns = xml_hash_new(pool, sizeof(struct xml_dtd_enotns_table)));
|
||
|
|
xml_dtd_declare_default_entities(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_dtd_cleanup(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
if (!ctx->dtd)
|
||
|
|
return;
|
||
|
|
mp_delete(ctx->dtd->pool);
|
||
|
|
ctx->dtd = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_dtd_finish(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
if (!ctx->dtd)
|
||
|
|
return;
|
||
|
|
// FIXME: validity checks
|
||
|
|
}
|
||
|
|
|
||
|
|
/*** Parsing functions ***/
|
||
|
|
|
||
|
|
/* References to parameter entities */
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_parse_pe_ref(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
/* PEReference ::= '%' Name ';'
|
||
|
|
* Already parsed: '%' */
|
||
|
|
struct mempool_state state;
|
||
|
|
mp_save(ctx->stack, &state);
|
||
|
|
char *name = xml_parse_name(ctx, ctx->stack);
|
||
|
|
xml_parse_char(ctx, ';');
|
||
|
|
struct xml_dtd_entity *ent = xml_dtd_find_pentity(ctx, name);
|
||
|
|
if (!ent)
|
||
|
|
xml_error(ctx, "Unknown entity %%%s;", name);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
TRACE(ctx, "Pushed entity %%%s;", name);
|
||
|
|
mp_restore(ctx->stack, &state);
|
||
|
|
xml_dec(ctx);
|
||
|
|
xml_push_entity(ctx, ent);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
mp_restore(ctx->stack, &state);
|
||
|
|
xml_dec(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
static uint
|
||
|
|
xml_parse_dtd_pe(struct xml_context *ctx, uint entity_decl)
|
||
|
|
{
|
||
|
|
/* Already parsed: '%' */
|
||
|
|
do
|
||
|
|
{
|
||
|
|
xml_inc(ctx);
|
||
|
|
if (!~entity_decl && (xml_peek_cat(ctx) & XML_CHAR_WHITE))
|
||
|
|
{
|
||
|
|
xml_dec(ctx);
|
||
|
|
return ~0U;
|
||
|
|
}
|
||
|
|
xml_parse_pe_ref(ctx);
|
||
|
|
while (xml_peek_cat(ctx) & XML_CHAR_WHITE)
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
}
|
||
|
|
while (xml_get_char(ctx) == '%');
|
||
|
|
xml_unget_char(ctx);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static uint
|
||
|
|
xml_parse_dtd_white(struct xml_context *ctx, uint mandatory)
|
||
|
|
{
|
||
|
|
/* Whitespace or parameter entity,
|
||
|
|
* mandatory==~0U has a special maening of the whitespace before the '%' character in an parameter entity declaration */
|
||
|
|
uint cnt = 0;
|
||
|
|
while (xml_peek_cat(ctx) & XML_CHAR_WHITE)
|
||
|
|
{
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
cnt = 1;
|
||
|
|
}
|
||
|
|
if (xml_peek_char(ctx) == '%')
|
||
|
|
{
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
return xml_parse_dtd_pe(ctx, mandatory);
|
||
|
|
}
|
||
|
|
else if (unlikely(mandatory && !cnt))
|
||
|
|
xml_fatal_expected_white(ctx);
|
||
|
|
return cnt;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
xml_dtd_parse_external_id(struct xml_context *ctx, char **system_id, char **public_id, uint allow_public)
|
||
|
|
{
|
||
|
|
struct xml_dtd *dtd = ctx->dtd;
|
||
|
|
uint c = xml_peek_char(ctx);
|
||
|
|
if (c == 'S')
|
||
|
|
{
|
||
|
|
xml_parse_seq(ctx, "SYSTEM");
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
*public_id = NULL;
|
||
|
|
*system_id = xml_parse_system_literal(ctx, dtd->pool);
|
||
|
|
}
|
||
|
|
else if (c == 'P')
|
||
|
|
{
|
||
|
|
xml_parse_seq(ctx, "PUBLIC");
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
*system_id = NULL;
|
||
|
|
*public_id = xml_parse_pubid_literal(ctx, dtd->pool);
|
||
|
|
if (xml_parse_dtd_white(ctx, !allow_public))
|
||
|
|
if ((c = xml_peek_char(ctx)) == '\'' || c == '"' || !allow_public)
|
||
|
|
*system_id = xml_parse_system_literal(ctx, dtd->pool);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
xml_fatal(ctx, "Expected an external ID");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* DTD: <!NOTATION ...> */
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_parse_notation_decl(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
/* NotationDecl ::= '<!NOTATION' S Name S (ExternalID | PublicID) S? '>'
|
||
|
|
* Already parsed: '<!NOTATION' */
|
||
|
|
TRACE(ctx, "parse_notation_decl");
|
||
|
|
struct xml_dtd *dtd = ctx->dtd;
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
|
||
|
|
struct xml_dtd_notn *notn = xml_dtd_notns_lookup(dtd->tab_notns, xml_parse_name(ctx, dtd->pool));
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
char *system_id, *public_id;
|
||
|
|
xml_dtd_parse_external_id(ctx, &system_id, &public_id, 1);
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
xml_parse_char(ctx, '>');
|
||
|
|
|
||
|
|
if (notn->flags & XML_DTD_NOTN_DECLARED)
|
||
|
|
xml_warn(ctx, "Notation %s already declared", notn->name);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
notn->flags = XML_DTD_NOTN_DECLARED;
|
||
|
|
notn->system_id = system_id;
|
||
|
|
notn->public_id = public_id;
|
||
|
|
slist_add_tail(&dtd->notns, ¬n->n);
|
||
|
|
}
|
||
|
|
xml_dec(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* DTD: <!ENTITY ...> */
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_parse_entity_decl(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
/* Already parsed: '<!ENTITY' */
|
||
|
|
TRACE(ctx, "parse_entity_decl");
|
||
|
|
struct xml_dtd *dtd = ctx->dtd;
|
||
|
|
uint flags = ~xml_parse_dtd_white(ctx, ~0U) ? 0 : XML_DTD_ENTITY_PARAMETER;
|
||
|
|
if (flags)
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
struct xml_dtd_entity *ent = xml_dtd_ents_lookup(flags ? dtd->tab_pents : dtd->tab_ents, xml_parse_name(ctx, dtd->pool));
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
slist *list = flags ? &dtd->pents : &dtd->ents;
|
||
|
|
if (ent->flags & XML_DTD_ENTITY_DECLARED)
|
||
|
|
{
|
||
|
|
xml_fatal(ctx, "Entity &%s; already declared, skipping not implemented", ent->name);
|
||
|
|
// FIXME: should be only warning
|
||
|
|
}
|
||
|
|
uint c, sep = xml_get_char(ctx);
|
||
|
|
if (sep == '\'' || sep == '"')
|
||
|
|
{
|
||
|
|
/* Internal entity:
|
||
|
|
* EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"' | "'" ([^%&'] | PEReference | Reference)* "'" */
|
||
|
|
char *p = mp_start_noalign(dtd->pool, 1);
|
||
|
|
while (1)
|
||
|
|
{
|
||
|
|
if ((c = xml_get_char(ctx)) == sep)
|
||
|
|
break;
|
||
|
|
if (c == '%')
|
||
|
|
{
|
||
|
|
// FIXME
|
||
|
|
ASSERT(0);
|
||
|
|
//xml_parse_parameter_ref(ctx);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (c == '&')
|
||
|
|
{
|
||
|
|
xml_inc(ctx);
|
||
|
|
if (xml_peek_char(ctx) != '#')
|
||
|
|
{
|
||
|
|
/* Bypass references to general entities */
|
||
|
|
struct mempool_state state;
|
||
|
|
mp_save(ctx->stack, &state);
|
||
|
|
char *n = xml_parse_name(ctx, ctx->stack);
|
||
|
|
xml_parse_char(ctx, ';');
|
||
|
|
xml_dec(ctx);
|
||
|
|
uint l = strlen(n);
|
||
|
|
p = mp_spread(dtd->pool, p, 3 + l);
|
||
|
|
*p++ = '&';
|
||
|
|
memcpy(p, n, l);
|
||
|
|
p += l;
|
||
|
|
*p++ = ';';;
|
||
|
|
mp_restore(ctx->stack, &state);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
c = xml_parse_char_ref(ctx);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
p = mp_spread(dtd->pool, p, 5);
|
||
|
|
p = utf8_32_put(p, c);
|
||
|
|
}
|
||
|
|
*p = 0;
|
||
|
|
ent->len = p - (char *)mp_ptr(dtd->pool);
|
||
|
|
ent->text = mp_end(dtd->pool, p + 1);
|
||
|
|
slist_add_tail(list, &ent->n);
|
||
|
|
ent->flags = flags | XML_DTD_ENTITY_DECLARED;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* External entity */
|
||
|
|
struct xml_dtd_notn *notn = NULL;
|
||
|
|
char *system_id, *public_id;
|
||
|
|
xml_unget_char(ctx);
|
||
|
|
xml_dtd_parse_external_id(ctx, &system_id, &public_id, 0);
|
||
|
|
if (xml_parse_dtd_white(ctx, 0) && flags && xml_peek_char(ctx) != '>')
|
||
|
|
{
|
||
|
|
/* General external unparsed entity */
|
||
|
|
flags |= XML_DTD_ENTITY_UNPARSED;
|
||
|
|
xml_parse_seq(ctx, "NDATA");
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
notn = xml_dtd_notns_lookup(dtd->tab_notns, xml_parse_name(ctx, dtd->pool));
|
||
|
|
}
|
||
|
|
slist_add_tail(list, &ent->n);
|
||
|
|
ent->flags = flags | XML_DTD_ENTITY_DECLARED | XML_DTD_ENTITY_EXTERNAL;
|
||
|
|
ent->system_id = system_id;
|
||
|
|
ent->public_id = public_id;
|
||
|
|
ent->notn = notn;
|
||
|
|
}
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
xml_parse_char(ctx, '>');
|
||
|
|
xml_dec(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* DTD: <!ELEMENT ...> */
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_parse_element_decl(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
/* Elementdecl ::= '<!ELEMENT' S Name S contentspec S? '>'
|
||
|
|
* Already parsed: '<!ELEMENT' */
|
||
|
|
struct xml_dtd *dtd = ctx->dtd;
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
char *name = xml_parse_name(ctx, dtd->pool);
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
struct xml_dtd_elem *elem = xml_dtd_elems_lookup(dtd->tab_elems, name);
|
||
|
|
if (elem->flags & XML_DTD_ELEM_DECLARED)
|
||
|
|
xml_fatal(ctx, "Element <%s> already declared", name);
|
||
|
|
|
||
|
|
/* contentspec ::= 'EMPTY' | 'ANY' | Mixed | children */
|
||
|
|
uint c = xml_peek_char(ctx);
|
||
|
|
if (c == 'E')
|
||
|
|
{
|
||
|
|
xml_parse_seq(ctx, "EMPTY");
|
||
|
|
elem->type = XML_DTD_ELEM_EMPTY;
|
||
|
|
}
|
||
|
|
else if (c == 'A')
|
||
|
|
{
|
||
|
|
xml_parse_seq(ctx, "ANY");
|
||
|
|
elem->type = XML_DTD_ELEM_ANY;
|
||
|
|
}
|
||
|
|
else if (c == '(')
|
||
|
|
{
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
xml_inc(ctx);
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
struct xml_dtd_elem_node *parent = elem->node = mp_alloc_zero(dtd->pool, sizeof(*parent));
|
||
|
|
if (xml_peek_char(ctx) == '#')
|
||
|
|
{
|
||
|
|
/* Mixed ::= '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*' | '(' S? '#PCDATA' S? ')' */
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
xml_parse_seq(ctx, "PCDATA");
|
||
|
|
elem->type = XML_DTD_ELEM_MIXED;
|
||
|
|
parent->type = XML_DTD_ELEM_PCDATA;
|
||
|
|
while (1)
|
||
|
|
{
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
if ((c = xml_get_char(ctx)) == ')')
|
||
|
|
break;
|
||
|
|
else if (c != '|')
|
||
|
|
xml_fatal_expected(ctx, ')');
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
struct xml_dtd_elem *son_elem = xml_dtd_elems_lookup(dtd->tab_elems, xml_parse_name(ctx, dtd->pool));
|
||
|
|
if (xml_dtd_enodes_find(dtd->tab_enodes, parent, son_elem))
|
||
|
|
xml_error(ctx, "Duplicate content '%s'", son_elem->name);
|
||
|
|
else
|
||
|
|
{
|
||
|
|
struct xml_dtd_elem_node *son = xml_dtd_enodes_new(dtd->tab_enodes, parent, son_elem);
|
||
|
|
slist_add_tail(&parent->sons, &son->n);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
xml_dec(ctx);
|
||
|
|
if (xml_peek_char(ctx) == '*')
|
||
|
|
{
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
parent->occur = XML_DTD_ELEM_OCCUR_MULT;
|
||
|
|
}
|
||
|
|
else if (!slist_head(&parent->sons))
|
||
|
|
parent->occur = XML_DTD_ELEM_OCCUR_ONCE;
|
||
|
|
else
|
||
|
|
xml_fatal_expected(ctx, '*');
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* children ::= (choice | seq) ('?' | '*' | '+')?
|
||
|
|
* cp ::= (Name | choice | seq) ('?' | '*' | '+')?
|
||
|
|
* choice ::= '(' S? cp ( S? '|' S? cp )+ S? ')'
|
||
|
|
* seq ::= '(' S? cp ( S? ',' S? cp )* S? ')' */
|
||
|
|
|
||
|
|
elem->type = XML_DTD_ELEM_CHILDREN;
|
||
|
|
parent->type = XML_DTD_ELEM_PCDATA;
|
||
|
|
uint c;
|
||
|
|
goto first;
|
||
|
|
|
||
|
|
while (1)
|
||
|
|
{
|
||
|
|
/* After name */
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
if ((c = xml_get_char(ctx)) == ')')
|
||
|
|
{
|
||
|
|
xml_dec(ctx);
|
||
|
|
if (parent->type == XML_DTD_ELEM_PCDATA)
|
||
|
|
parent->type = XML_DTD_ELEM_SEQ;
|
||
|
|
if ((c = xml_get_char(ctx)) == '?')
|
||
|
|
parent->occur = XML_DTD_ELEM_OCCUR_OPT;
|
||
|
|
else if (c == '*')
|
||
|
|
parent->occur = XML_DTD_ELEM_OCCUR_MULT;
|
||
|
|
else if (c == '+')
|
||
|
|
parent->occur = XML_DTD_ELEM_OCCUR_PLUS;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
xml_unget_char(ctx);
|
||
|
|
parent->occur = XML_DTD_ELEM_OCCUR_ONCE;
|
||
|
|
}
|
||
|
|
if (!parent->parent)
|
||
|
|
break;
|
||
|
|
parent = parent->parent;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
else if (c == '|')
|
||
|
|
{
|
||
|
|
if (parent->type == XML_DTD_ELEM_PCDATA)
|
||
|
|
parent->type = XML_DTD_ELEM_OR;
|
||
|
|
else if (parent->type != XML_DTD_ELEM_OR)
|
||
|
|
xml_fatal(ctx, "Mixed operators in the list of element children");
|
||
|
|
}
|
||
|
|
else if (c == ',')
|
||
|
|
{
|
||
|
|
if (parent->type == XML_DTD_ELEM_PCDATA)
|
||
|
|
parent->type = XML_DTD_ELEM_SEQ;
|
||
|
|
else if (parent->type != XML_DTD_ELEM_SEQ)
|
||
|
|
xml_fatal(ctx, "Mixed operators in the list of element children");
|
||
|
|
}
|
||
|
|
else if (c == '(')
|
||
|
|
{
|
||
|
|
xml_inc(ctx);
|
||
|
|
struct xml_dtd_elem_node *son = mp_alloc_zero(dtd->pool, sizeof(*son));
|
||
|
|
son->parent = parent;
|
||
|
|
slist_add_tail(&parent->sons, &son->n);
|
||
|
|
parent = son->parent;
|
||
|
|
son->type = XML_DTD_ELEM_MIXED;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
xml_unget_char(ctx);
|
||
|
|
|
||
|
|
/* Before name */
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
first:;
|
||
|
|
struct xml_dtd_elem *son_elem = xml_dtd_elems_lookup(dtd->tab_elems, xml_parse_name(ctx, dtd->pool));
|
||
|
|
// FIXME: duplicates, occurance
|
||
|
|
//struct xml_dtd_elem_node *son = xml_dtd_enodes_new(dtd->tab_enodes, parent, son_elem);
|
||
|
|
struct xml_dtd_elem_node *son = mp_alloc_zero(dtd->pool, sizeof(*son));
|
||
|
|
son->parent = parent;
|
||
|
|
son->elem = son_elem;
|
||
|
|
slist_add_tail(&parent->sons, &son->n);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
xml_fatal(ctx, "Expected element content specification");
|
||
|
|
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
xml_parse_char(ctx, '>');
|
||
|
|
xml_dec(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_parse_attr_list_decl(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
/* AttlistDecl ::= '<!ATTLIST' S Name AttDef* S? '>'
|
||
|
|
* AttDef ::= S Name S AttType S DefaultDecl
|
||
|
|
* Already parsed: '<!ATTLIST' */
|
||
|
|
struct xml_dtd *dtd = ctx->dtd;
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
struct xml_dtd_elem *elem = xml_dtd_elems_lookup(ctx->dtd->tab_elems, xml_parse_name(ctx, dtd->pool));
|
||
|
|
|
||
|
|
while (xml_parse_dtd_white(ctx, 0) && xml_peek_char(ctx) != '>')
|
||
|
|
{
|
||
|
|
char *name = xml_parse_name(ctx, dtd->pool);
|
||
|
|
struct xml_dtd_attr *attr = xml_dtd_attrs_find(dtd->tab_attrs, elem, name);
|
||
|
|
uint ignored = 0;
|
||
|
|
if (attr)
|
||
|
|
{
|
||
|
|
xml_warn(ctx, "Duplicate attribute definition");
|
||
|
|
ignored++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
attr = xml_dtd_attrs_new(ctx->dtd->tab_attrs, elem, name);
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
if (xml_peek_char(ctx) == '(')
|
||
|
|
{
|
||
|
|
xml_skip_char(ctx); // FIXME: xml_inc/dec ?
|
||
|
|
if (!ignored)
|
||
|
|
attr->type = XML_ATTR_ENUM;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
char *value = xml_parse_nmtoken(ctx, dtd->pool);
|
||
|
|
if (!ignored)
|
||
|
|
if (xml_dtd_evals_find(ctx->dtd->tab_evals, attr, value))
|
||
|
|
xml_error(ctx, "Duplicate enumeration value");
|
||
|
|
else
|
||
|
|
xml_dtd_evals_new(ctx->dtd->tab_evals, attr, value);
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
}
|
||
|
|
while (xml_get_char(ctx) == '|');
|
||
|
|
xml_unget_char(ctx);
|
||
|
|
xml_parse_char(ctx, ')');
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
char *type = xml_parse_name(ctx, dtd->pool);
|
||
|
|
enum xml_dtd_attr_type t = XML_ATTR_CDATA;
|
||
|
|
if (!strcmp(type, "CDATA"))
|
||
|
|
t = XML_ATTR_CDATA;
|
||
|
|
else if (!strcmp(type, "ID"))
|
||
|
|
t = XML_ATTR_ID;
|
||
|
|
else if (!strcmp(type, "IDREF"))
|
||
|
|
t = XML_ATTR_IDREF;
|
||
|
|
else if (!strcmp(type, "IDREFS"))
|
||
|
|
t = XML_ATTR_IDREFS;
|
||
|
|
else if (!strcmp(type, "ENTITY"))
|
||
|
|
t = XML_ATTR_ENTITY;
|
||
|
|
else if (!strcmp(type, "ENTITIES"))
|
||
|
|
t = XML_ATTR_ENTITIES;
|
||
|
|
else if (!strcmp(type, "NMTOKEN"))
|
||
|
|
t = XML_ATTR_NMTOKEN;
|
||
|
|
else if (!strcmp(type, "NMTOKENS"))
|
||
|
|
t = XML_ATTR_NMTOKENS;
|
||
|
|
else if (!strcmp(type, "NOTATION"))
|
||
|
|
{
|
||
|
|
if (elem->type == XML_DTD_ELEM_EMPTY)
|
||
|
|
xml_fatal(ctx, "Empty element must not have notation attribute");
|
||
|
|
// FIXME: An element type MUST NOT have more than one NOTATION attribute specified.
|
||
|
|
t = XML_ATTR_NOTATION;
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
xml_parse_char(ctx, '(');
|
||
|
|
do
|
||
|
|
{
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
struct xml_dtd_notn *n = xml_dtd_notns_lookup(ctx->dtd->tab_notns, xml_parse_name(ctx, dtd->pool));
|
||
|
|
if (!ignored)
|
||
|
|
if (xml_dtd_enotns_find(ctx->dtd->tab_enotns, attr, n))
|
||
|
|
xml_error(ctx, "Duplicate enumerated notation");
|
||
|
|
else
|
||
|
|
xml_dtd_enotns_new(ctx->dtd->tab_enotns, attr, n);
|
||
|
|
xml_parse_dtd_white(ctx, 0);
|
||
|
|
}
|
||
|
|
while (xml_get_char(ctx) == '|');
|
||
|
|
xml_unget_char(ctx);
|
||
|
|
xml_parse_char(ctx, ')');
|
||
|
|
}
|
||
|
|
else
|
||
|
|
xml_fatal(ctx, "Unknown attribute type");
|
||
|
|
if (!ignored)
|
||
|
|
attr->type = t;
|
||
|
|
}
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
enum xml_dtd_attr_default def = XML_ATTR_NONE;
|
||
|
|
if (xml_get_char(ctx) == '#')
|
||
|
|
switch (xml_peek_char(ctx))
|
||
|
|
{
|
||
|
|
case 'R':
|
||
|
|
xml_parse_seq(ctx, "REQUIRED");
|
||
|
|
def = XML_ATTR_REQUIRED;
|
||
|
|
break;
|
||
|
|
case 'I':
|
||
|
|
xml_parse_seq(ctx, "IMPLIED");
|
||
|
|
def = XML_ATTR_IMPLIED;
|
||
|
|
break;
|
||
|
|
case 'F':
|
||
|
|
xml_parse_seq(ctx, "FIXED");
|
||
|
|
def = XML_ATTR_FIXED;
|
||
|
|
xml_parse_dtd_white(ctx, 1);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
xml_fatal(ctx, "Expected a modifier for default attribute value");
|
||
|
|
}
|
||
|
|
else
|
||
|
|
xml_unget_char(ctx);
|
||
|
|
if (def != XML_ATTR_REQUIRED && def != XML_ATTR_IMPLIED)
|
||
|
|
{
|
||
|
|
char *v = xml_parse_attr_value(ctx, attr);
|
||
|
|
if (!ignored)
|
||
|
|
attr->default_value = v;
|
||
|
|
}
|
||
|
|
if (!ignored)
|
||
|
|
attr->default_mode = def;
|
||
|
|
}
|
||
|
|
xml_skip_char(ctx);
|
||
|
|
xml_dec(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_skip_internal_subset(struct xml_context *ctx)
|
||
|
|
{
|
||
|
|
TRACE(ctx, "skip_internal_subset");
|
||
|
|
/* AlreadyParsed: '[' */
|
||
|
|
uint c;
|
||
|
|
while ((c = xml_get_char(ctx)) != ']')
|
||
|
|
{
|
||
|
|
if (c != '<')
|
||
|
|
continue;
|
||
|
|
if ((c = xml_get_char(ctx)) == '?')
|
||
|
|
{
|
||
|
|
xml_inc(ctx);
|
||
|
|
xml_skip_pi(ctx);
|
||
|
|
}
|
||
|
|
else if (c != '!')
|
||
|
|
xml_dec(ctx);
|
||
|
|
else if (xml_get_char(ctx) == '-')
|
||
|
|
{
|
||
|
|
xml_inc(ctx);
|
||
|
|
xml_skip_comment(ctx);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
while ((c = xml_get_char(ctx)) != '>')
|
||
|
|
if (c == '\'' || c == '"')
|
||
|
|
while (xml_get_char(ctx) != c);
|
||
|
|
}
|
||
|
|
xml_dec(ctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*** Validation of attribute values ***/
|
||
|
|
|
||
|
|
static uint
|
||
|
|
xml_check_tokens(char *value, uint first_cat, uint next_cat, uint seq)
|
||
|
|
{
|
||
|
|
char *p = value;
|
||
|
|
uint u;
|
||
|
|
while (1)
|
||
|
|
{
|
||
|
|
p = utf8_32_get(p, &u);
|
||
|
|
if (!(xml_char_cat(u) & first_cat))
|
||
|
|
return 0;
|
||
|
|
while (*p & ~0x20)
|
||
|
|
{
|
||
|
|
p = utf8_32_get(p, &u);
|
||
|
|
if (!(xml_char_cat(u) & next_cat))
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (!*p)
|
||
|
|
return 1;
|
||
|
|
if (!seq)
|
||
|
|
return 0;
|
||
|
|
p++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static uint
|
||
|
|
xml_is_name(struct xml_context *ctx, char *value)
|
||
|
|
{
|
||
|
|
/* Name ::= NameStartChar (NameChar)* */
|
||
|
|
return xml_check_tokens(value, ctx->cat_sname, ctx->cat_name, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static uint
|
||
|
|
xml_is_names(struct xml_context *ctx, char *value)
|
||
|
|
{
|
||
|
|
/* Names ::= Name (#x20 Name)* */
|
||
|
|
return xml_check_tokens(value, ctx->cat_sname, ctx->cat_name, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static uint
|
||
|
|
xml_is_nmtoken(struct xml_context *ctx, char *value)
|
||
|
|
{
|
||
|
|
/* Nmtoken ::= (NameChar)+ */
|
||
|
|
return xml_check_tokens(value, ctx->cat_name, ctx->cat_name, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static uint
|
||
|
|
xml_is_nmtokens(struct xml_context *ctx, char *value)
|
||
|
|
{
|
||
|
|
/* Nmtokens ::= Nmtoken (#x20 Nmtoken)* */
|
||
|
|
return xml_check_tokens(value, ctx->cat_name, ctx->cat_name, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
xml_err_attr_format(struct xml_context *ctx, struct xml_dtd_attr *dtd, char *type)
|
||
|
|
{
|
||
|
|
xml_error(ctx, "Attribute %s in <%s> does not match the production of %s", dtd->name, dtd->elem->name, type);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
xml_validate_attr(struct xml_context *ctx, struct xml_dtd_attr *dtd, char *value)
|
||
|
|
{
|
||
|
|
if (dtd->type == XML_ATTR_CDATA)
|
||
|
|
return;
|
||
|
|
xml_normalize_white(ctx, value);
|
||
|
|
switch (dtd->type)
|
||
|
|
{
|
||
|
|
case XML_ATTR_ID:
|
||
|
|
if (!xml_is_name(ctx, value))
|
||
|
|
xml_err_attr_format(ctx, dtd, "NAME");
|
||
|
|
//FIXME: add to a hash table
|
||
|
|
break;
|
||
|
|
case XML_ATTR_IDREF:
|
||
|
|
if (!xml_is_name(ctx, value))
|
||
|
|
xml_err_attr_format(ctx, dtd, "NAME");
|
||
|
|
// FIXME: find in hash table (beware forward references)
|
||
|
|
break;
|
||
|
|
case XML_ATTR_IDREFS:
|
||
|
|
if (!xml_is_names(ctx, value))
|
||
|
|
xml_err_attr_format(ctx, dtd, "NAMES");
|
||
|
|
// FIXME: find
|
||
|
|
break;
|
||
|
|
case XML_ATTR_ENTITY:
|
||
|
|
// FIXME
|
||
|
|
break;
|
||
|
|
case XML_ATTR_ENTITIES:
|
||
|
|
// FIXME
|
||
|
|
break;
|
||
|
|
case XML_ATTR_NMTOKEN:
|
||
|
|
if (!xml_is_nmtoken(ctx, value))
|
||
|
|
xml_err_attr_format(ctx, dtd, "NMTOKEN");
|
||
|
|
break;
|
||
|
|
case XML_ATTR_NMTOKENS:
|
||
|
|
if (!xml_is_nmtokens(ctx, value))
|
||
|
|
xml_err_attr_format(ctx, dtd, "NMTOKENS");
|
||
|
|
break;
|
||
|
|
case XML_ATTR_ENUM:
|
||
|
|
if (!xml_dtd_evals_find(ctx->dtd->tab_evals, dtd, value))
|
||
|
|
xml_error(ctx, "Attribute %s in <%s> contains an undefined enumeration value", dtd->name, dtd->elem->name);
|
||
|
|
break;
|
||
|
|
case XML_ATTR_NOTATION:
|
||
|
|
if (!xml_dtd_find_notn(ctx, value))
|
||
|
|
xml_error(ctx, "Attribute %s in <%s> contains an undefined notation", dtd->name, dtd->elem->name);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|