/*
* Sherlock Library -- A simple XML parser
*
- * (c) 2007 Pavel Charvat <pchar@ucw.cz>
+ * (c) 2007
--2008 Pavel Charvat <pchar@ucw.cz>
*
* This software may be freely distributed and used according to the terms
* of the GNU Lesser General Public License.
#include "sherlock/sherlock.h"
#include "sherlock/xml/xml.h"
#include "sherlock/xml/dtd.h"
-#include "sherlock/xml/common.h"
+#include "sherlock/xml/internals.h"
#include "lib/fastbuf.h"
#include "lib/ff-unicode.h"
#include "lib/unicode.h"
/* Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
* Already parsed: '<!-' */
xml_parse_char(ctx, '-');
- struct xml_node *n = xml_push_dom(ctx);
+ struct xml_node *n = xml_push_dom(ctx, NULL);
n->type = XML_NODE_COMMENT;
char *p = mp_start_noalign(ctx->pool, 6);
while (1)
* PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
* PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
* Already parsed: '<?' */
- struct xml_node *n = xml_push_dom(ctx);
+ struct xml_node *n = xml_push_dom(ctx, NULL);
n->type = XML_NODE_PI;
n->name = xml_parse_name(ctx, ctx->pool);
if (unlikely(!strcasecmp(n->name, "xml")))
xml_dec(ctx);
}
-/*** Character data ***/
-
-static inline uns
-xml_flush_chars(struct xml_context *ctx)
-{
- struct fastbuf *fb = &ctx->chars;
- if (fb->bufend == fb->buffer)
- return 0;
- TRACE(ctx, "flush_chars");
- struct xml_node *n = ctx->node;
- n->text = xml_end_chars(ctx, &n->len);
- n->len = fb->bufend - fb->buffer;
- if ((ctx->flags & XML_REPORT_CHARS) && ctx->h_chars)
- ctx->h_chars(ctx);
- return 1;
-}
-
-static inline void
-xml_pop_chars(struct xml_context *ctx)
-{
- xml_pop_dom(ctx, !(ctx->flags & XML_ALLOC_CHARS));
- TRACE(ctx, "pop_chars");
-}
-
-static inline void
-xml_append_chars(struct xml_context *ctx)
-{
- TRACE(ctx, "append_chars");
- struct fastbuf *out = &ctx->chars;
- while (xml_get_char(ctx) != '<')
- if (xml_last_char(ctx) == '&')
- {
- xml_inc(ctx);
- xml_parse_ref(ctx);
- }
- else
- bput_utf8_32(out, xml_last_char(ctx));
- xml_unget_char(ctx);
-}
-
-/*** CDATA sections ***/
-
-static void
-xml_push_cdata(struct xml_context *ctx)
-{
- TRACE(ctx, "push_cdata");
- /* CDSect :== '<![CDATA[' (Char* - (Char* ']]>' Char*)) ']]>'
- * Already parsed: '<![' */
- xml_parse_seq(ctx, "CDATA[");
- struct xml_node *n = xml_push_dom(ctx);
- n->type = XML_NODE_CHARS;
- char *p = mp_start_noalign(ctx->pool, 7);
- while (1)
- {
- if (xml_get_char(ctx) == ']')
- {
- if (xml_get_char(ctx) == ']')
- if (xml_get_char(ctx) == '>')
- break;
- else
- *p++ = ']';
- *p++ = ']';
- }
- p = utf8_32_put(p, xml_last_char(ctx));
- p = mp_spread(ctx->pool, p, 7);
- }
- *p = 0;
- n->len = p - (char *)mp_ptr(ctx->pool);
- n->text = mp_end(ctx->pool, p + 1);
- if ((ctx->flags & XML_REPORT_CHARS) && ctx->h_cdata)
- ctx->h_cdata(ctx);
-}
-
-static void
-xml_pop_cdata(struct xml_context *ctx)
-{
- xml_pop_dom(ctx, !(ctx->flags & XML_ALLOC_CHARS));
- xml_dec(ctx);
- TRACE(ctx, "pop_cdata");
-}
-
-static void
-xml_append_cdata(struct xml_context *ctx)
-{
- TRACE(ctx, "append_cdata");
- xml_parse_seq(ctx, "CDATA[");
- struct fastbuf *out = &ctx->chars;
- while (1)
- {
- if (xml_get_char(ctx) == ']')
- {
- if (xml_get_char(ctx) == ']')
- if (xml_get_char(ctx) == '>')
- break;
- else
- bputc(out, ']');
- bputc(out, ']');
- }
- bput_utf8_32(out, xml_last_char(ctx));
- }
- xml_dec(ctx);
-}
-
-static void UNUSED
-xml_skip_cdata(struct xml_context *ctx)
-{
- TRACE(ctx, "skip_cdata");
- xml_parse_seq(ctx, "CDATA[");
- while (xml_get_char(ctx) != ']' || xml_get_char(ctx) != ']' || xml_get_char(ctx) != '>');
- xml_dec(ctx);
-}
-
/*** Character references ***/
uns
/*** References to general entities ***/
-void
+static void
xml_parse_ref(struct xml_context *ctx)
{
/* Reference ::= EntityRef | CharRef
mp_save(ctx->stack, &state);
char *name = xml_parse_name(ctx, ctx->stack);
xml_parse_char(ctx, ';');
- struct xml_dtd_ent *ent = xml_dtd_find_ent(ctx, name);
+ struct xml_dtd_entity *ent = xml_dtd_find_entity(ctx, name);
if (!ent)
{
xml_error(ctx, "Unknown entity &%s;", name);
bputs(out, name);
bputc(out, ';');
}
- else if (ent->flags & XML_DTD_ENT_TRIVIAL)
+ else if (ent->flags & XML_DTD_ENTITY_TRIVIAL)
{
TRACE(ctx, "Trivial entity &%s;", name);
- bwrite(out, ent->text, ent->len);
+ bputs(out, ent->text);
}
else
{
}
}
+/*** Character data ***/
+
+void
+xml_spout_chars(struct fastbuf *fb)
+{
+ if (fb->bptr < fb->bufend)
+ return;
+ struct xml_context *ctx = SKIP_BACK(struct xml_context, chars, fb);
+ struct mempool *pool = ctx->pool;
+ if (fb->bufend != fb->buffer)
+ {
+ TRACE(ctx, "growing chars");
+ uns len = fb->bufend - fb->buffer;
+ uns reported = fb->bstop - fb->buffer;
+ fb->buffer = mp_expand(pool);
+ fb->bufend = fb->buffer + mp_avail(pool);
+ fb->bptr = fb->buffer + len;
+ fb->bstop = fb->buffer + reported;
+ }
+ else
+ {
+ TRACE(ctx, "starting chars");
+ mp_save(pool, &ctx->chars_state);
+ fb->bptr = fb->buffer = fb->bstop = mp_start_noalign(pool, 2);
+ fb->bufend = fb->buffer + mp_avail(pool) - 1;
+ }
+}
+
+static inline uns
+xml_end_chars(struct xml_context *ctx, char **out)
+{
+ struct fastbuf *fb = &ctx->chars;
+ uns len = fb->bptr - fb->buffer;
+ if (len)
+ {
+ TRACE(ctx, "ending chars");
+ *fb->bptr = 0;
+ *out = mp_end(ctx->pool, fb->bptr + 1);
+ fb->bufend = fb->bstop = fb->bptr = fb->buffer;
+ }
+ return len;
+}
+
+static inline uns
+xml_report_chars(struct xml_context *ctx, char **out)
+{
+ struct fastbuf *fb = &ctx->chars;
+ uns len = fb->bptr - fb->buffer;
+ if (len)
+ {
+ *fb->bptr = 0;
+ *out = fb->bstop;
+ fb->bstop = fb->bptr;
+ }
+ return len;
+}
+
+static inline uns
+xml_flush_chars(struct xml_context *ctx)
+{
+ char *text, *rtext;
+ uns len = xml_end_chars(ctx, &text), rlen;
+ if (len)
+ {
+ if ((ctx->flags & XML_REPORT_CHARS) && ctx->h_block && (rlen = xml_report_chars(ctx, &rtext)))
+ ctx->h_block(ctx, rtext, rlen);
+ if (!(ctx->flags & XML_ALLOC_CHARS) && (!(ctx->flags & XML_REPORT_CHARS) || !ctx->h_chars))
+ {
+ mp_restore(ctx->pool, &ctx->chars_state);
+ return 0;
+ }
+ struct xml_node *n = xml_push_dom(ctx, &ctx->chars_state);
+ n->type = XML_NODE_CHARS;
+ n->text = text;
+ n->len = len;
+ if ((ctx->flags & XML_REPORT_CHARS) && ctx->h_chars)
+ ctx->h_chars(ctx);
+ }
+ return len;
+}
+
+static inline void
+xml_pop_chars(struct xml_context *ctx)
+{
+ xml_pop_dom(ctx, !(ctx->flags & XML_ALLOC_CHARS));
+ TRACE(ctx, "pop_chars");
+}
+
+static inline void
+xml_append_chars(struct xml_context *ctx)
+{
+ TRACE(ctx, "append_chars");
+ struct fastbuf *out = &ctx->chars;
+ while (xml_get_char(ctx) != '<')
+ if (xml_last_char(ctx) == '&')
+ {
+ xml_inc(ctx);
+ xml_parse_ref(ctx);
+ }
+ else
+ bput_utf8_32(out, xml_last_char(ctx));
+ xml_unget_char(ctx);
+}
+
+/*** CDATA sections ***/
+
+static void
+xml_append_cdata(struct xml_context *ctx)
+{
+ /* CDSect :== '<![CDATA[' (Char* - (Char* ']]>' Char*)) ']]>'
+ * Already parsed: '<![' */
+ TRACE(ctx, "append_cdata");
+ xml_parse_seq(ctx, "CDATA[");
+ struct fastbuf *out = &ctx->chars;
+ uns rlen;
+ char *rtext;
+ if ((ctx->flags & XML_REPORT_CHARS) && ctx->h_block && (rlen = xml_report_chars(ctx, &rtext)))
+ ctx->h_block(ctx, rtext, rlen);
+ while (1)
+ {
+ if (xml_get_char(ctx) == ']')
+ {
+ if (xml_get_char(ctx) == ']')
+ if (xml_get_char(ctx) == '>')
+ break;
+ else
+ bputc(out, ']');
+ bputc(out, ']');
+ }
+ bput_utf8_32(out, xml_last_char(ctx));
+ }
+ if ((ctx->flags & XML_REPORT_CHARS) && ctx->h_cdata && (rlen = xml_report_chars(ctx, &rtext)))
+ ctx->h_cdata(ctx, rtext, rlen);
+ xml_dec(ctx);
+}
+
+static void UNUSED
+xml_skip_cdata(struct xml_context *ctx)
+{
+ TRACE(ctx, "skip_cdata");
+ xml_parse_seq(ctx, "CDATA[");
+ while (xml_get_char(ctx) != ']' || xml_get_char(ctx) != ']' || xml_get_char(ctx) != '>');
+ xml_dec(ctx);
+}
+
/*** Attribute values ***/
char *
{
TRACE(ctx, "parse_attr_value");
/* AttValue ::= '"' ([^<&"] | Reference)* '"' | "'" ([^<&'] | Reference)* "'" */
- /* FIXME:
- * -- copying from ctx->chars to ctx->pool is not necessary, we could directly write to ctx->pool
- * -- berare quotes inside parased entities
- * -- check value constrains / normalize value */
+ /* FIXME: -- check value constrains / normalize leading/trailing WS and repeated WS */
struct mempool_state state;
uns quote = xml_parse_quote(ctx);
mp_save(ctx->stack, &state);
- xml_start_chars(ctx);
struct fastbuf *out = &ctx->chars;
+ struct xml_source *src = ctx->src;
while (1)
{
uns c = xml_get_char(ctx);
xml_inc(ctx);
xml_parse_ref(ctx);
}
- else if (c == quote) // FIXME: beware quotes inside parsed entities
+ else if (c == quote && src == ctx->src)
break;
else if (c == '<')
xml_error(ctx, "Attribute value must not contain '<'");
bput_utf8_32(out, c);
}
mp_restore(ctx->stack, &state);
- uns len;
- return xml_end_chars(ctx, &len);
+ char *text;
+ return xml_end_chars(ctx, &text) ? text : "";
+}
+
+uns
+xml_normalize_white(struct xml_context *ctx UNUSED, char *text)
+{
+ char *s = text, *d = text;
+ while (*s == 0x20)
+ s++;
+ while (1)
+ {
+ while (*s & ~0x20)
+ *d++ = *s++;
+ if (!*s)
+ break;
+ while (*++s == 0x20);
+ *d++ = 0x20;
+ }
+ if (d != text && d[-1] == 0x20)
+ d--;
+ *d = 0;
+ return d - text;
}
/*** Attributes ***/
a->elem = e;
a->name = name;
a->val = NULL;
+ a->user = NULL;
slist_add_tail(&e->attrs, &a->n);
}
{
TRACE(ctx, "parse_attr");
/* Attribute ::= Name Eq AttValue */
- /* FIXME:
- * -- memory management
- * -- DTD */
struct xml_node *e = ctx->node;
char *n = xml_parse_name(ctx, ctx->pool);
struct xml_attr *a = xml_attrs_lookup(ctx->tab_attrs, e, n);
xml_parse_eq(ctx);
char *v = xml_parse_attr_value(ctx, NULL);
if (a->val)
- xml_error(ctx, "Attribute %s is not unique", n);
+ {
+ xml_error(ctx, "Attribute %s is not unique in element <%s>", n, e->name);
+ return;
+ }
+ a->val = v;
+ if (!e->dtd)
+ a->dtd = NULL;
+ else if (!(a->dtd = xml_dtd_find_attr(ctx, e->dtd, a->name)))
+ xml_error(ctx, "Undefined attribute %s in element <%s>", n, e->name);
else
- a->val = v;
+ xml_validate_attr(ctx, a->dtd, a->val);
}
struct xml_attr *
* EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
* STag ::= '<' Name (S Attribute)* S? '>'
* Already parsed: '<' */
- struct xml_node *e = xml_push_dom(ctx);
+ struct xml_node *e = xml_push_dom(ctx, NULL);
clist_init(&e->sons);
e->type = XML_NODE_ELEM;
e->name = xml_parse_name(ctx, ctx->pool);
slist_init(&e->attrs);
if (!e->parent)
{
- ctx->root = e;
+ ctx->dom = e;
if (ctx->doctype && strcmp(e->name, ctx->doctype))
- xml_error(ctx, "The root element %s does not match the document type %s", e->name, ctx->doctype);
+ xml_error(ctx, "The root element <%s> does not match the document type <%s>", e->name, ctx->doctype);
+ }
+ if (!ctx->dtd)
+ e->dtd = NULL;
+ else if (!(e->dtd = xml_dtd_find_elem(ctx, e->name)))
+ xml_error(ctx, "Undefined element <%s>", e->name);
+ else
+ {
+ // FIXME: validate regular expressions
}
while (1)
{
if (free)
{
if (!e->parent)
- ctx->root = NULL;
+ ctx->dom = NULL;
/* Restore hash table of attributes */
SLIST_FOR_EACH(struct xml_attr *, a, e->attrs)
xml_attrs_remove(ctx->tab_attrs, a);
{
case XML_STATE_START:
TRACE(ctx, "entering prolog");
+ ctx->flags |= XML_SRC_DOCUMENT | XML_SRC_EXPECTED_DECL;
if (ctx->h_document_start)
ctx->h_document_start(ctx);
/* XMLDecl */
{
xml_parse_white(ctx, 0);
xml_parse_char(ctx, '<');
+ xml_inc(ctx);
if ((c = xml_get_char(ctx)) == '?')
/* Processing intruction */
if (!(ctx->flags & XML_REPORT_PIS))
PULL(DOCTYPE_DECL);
if (xml_peek_char(ctx) == '[')
{
- // FIXME: ability to skip the subset
xml_skip_char(ctx);
xml_inc(ctx);
- xml_dtd_init(ctx);
- if (ctx->h_dtd_start)
- ctx->h_dtd_start(ctx);
- xml_parse_internal_subset(ctx);
- // FIXME: external subset
- if (ctx->h_dtd_end)
- ctx->h_dtd_end(ctx);
- xml_parse_white(ctx, 0);
+ if (ctx->flags & XML_PARSE_DTD)
+ {
+ xml_dtd_init(ctx);
+ if (ctx->h_dtd_start)
+ ctx->h_dtd_start(ctx);
+ // FIXME: pull iface?
+ xml_parse_internal_subset(ctx);
+ // FIXME: external subset
+ if (ctx->h_dtd_end)
+ ctx->h_dtd_end(ctx);
+ }
+ else
+ xml_skip_internal_subset(ctx);
}
+ xml_parse_white(ctx, 0);
xml_parse_char(ctx, '>');
+ xml_dec(ctx);
}
}
}
else
xml_skip_char(ctx);
-first_tag: ;
-
xml_inc(ctx);
+first_tag:
+
if ((c = xml_get_char(ctx)) == '?')
{
/* PI */
else if (c == '[')
{
/* CDATA */
- if (!(ctx->flags & XML_UNFOLD_CDATA))
- xml_append_cdata(ctx);
- else
- {
- if (xml_flush_chars(ctx))
- {
- PULL_STATE(CHARS, CHARS_BEFORE_CDATA);
- xml_pop_chars(ctx);
- }
- xml_push_cdata(ctx);
- PULL(CDATA);
- xml_pop_cdata(ctx);
- }
+ xml_append_cdata(ctx);
}
else
xml_fatal(ctx, "Unexpected character after '<!'");
uns
xml_parse(struct xml_context *ctx)
{
- ctx->pull = 0;
- xml_next(ctx);
+ /* This cycle should run only once unless the user overrides the value of ctx->pull in a SAX handler */
+ do
+ {
+ ctx->pull = 0;
+ }
+ while (xml_next(ctx));
return ctx->err_code;
}
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