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#include "xml.h"
#include "input_buffer.h"
#include <assert.h>
typedef struct {
ib_t last;
kit_str_builder_t text;
kit_da_xml_t tags;
} kit_xml_intermediate_t;
static kit_xml_intermediate_t kit_xml_parse_buf_(
ib_t begin, kit_allocator_t *alloc) {
kit_xml_intermediate_t res;
memset(&res, 0, sizeof res);
ib_t last, spaces;
memset(&last, 0, sizeof last);
memset(&spaces, 0, sizeof spaces);
ib_t tag_text = ib_until(begin, SZ("<"));
last = ib_copy(tag_text);
DA_INIT(res.tags, 0, alloc);
for (;;) {
ib_t tagend_open = ib_exact(last, SZ("</"));
ib_destroy(tagend_open);
if (tagend_open.status == KIT_OK)
break;
ib_t tag_open = ib_exact(last, SZ("<"));
if (tag_open.status != KIT_OK) {
ib_destroy(tag_open);
break;
}
xml_t tag;
memset(&tag, 0, sizeof tag);
spaces = ib_any(tag_open, SZ(" \t\r\n"));
ib_t tag_name = ib_none(spaces, SZ(" \t\r\n/>"));
ib_destroy(spaces);
DA_INIT(tag.properties, 0, alloc);
ib_destroy(last);
last = ib_copy(tag_name);
for (;;) {
spaces = ib_any(last, SZ(" \t\r\n"));
ib_t property = ib_none(spaces, SZ(" \t\r\n=/>"));
ib_destroy(spaces);
if (property.status != KIT_OK || property.data.size == 0) {
ib_destroy(property);
break;
}
spaces = ib_any(property, SZ(" \t\r\n"));
ib_t equals = ib_exact(spaces, SZ("="));
ib_destroy(spaces);
spaces = ib_any(equals, SZ(" \t\r\n"));
ib_t value_open = ib_exact(spaces, SZ("\""));
ib_destroy(spaces);
ib_t value_text = ib_until(value_open, SZ("\""));
ib_t value_close = ib_exact(value_text, SZ("\""));
ib_destroy(last);
last = value_close;
if (last.status == KIT_OK) {
i64 n = tag.properties.size;
DA_RESIZE(tag.properties, n + 1);
if (tag.properties.size != n + 1) {
last.status = KIT_ERROR_BAD_ALLOC;
DA_DESTROY(tag.properties);
} else {
// move
tag.properties.values[n].name = property.data;
memset(&property.data, 0, sizeof property.data);
// move
tag.properties.values[n].value = value_text.data;
memset(&value_text.data, 0, sizeof value_text.data);
}
}
ib_destroy(property);
ib_destroy(equals);
ib_destroy(value_open);
ib_destroy(value_text);
}
spaces = ib_any(last, SZ(" \t\r\n"));
ib_t tag_close = ib_exact(spaces, SZ(">"));
ib_t tag_close_empty = ib_exact(spaces, SZ("/>"));
ib_destroy(spaces);
if (tag_close.status == KIT_OK) {
kit_xml_intermediate_t im = kit_xml_parse_buf_(tag_close,
alloc);
tag.text = im.text;
tag.children = im.tags;
tagend_open = ib_exact(im.last, SZ("</"));
ib_destroy(im.last);
spaces = ib_any(tagend_open, SZ(" \t\r\n"));
ib_t tagend_name = ib_exact(spaces, WRAP_STR(tag_name.data));
ib_destroy(spaces);
spaces = ib_any(tagend_name, SZ(" \t\r\n"));
ib_t tagend_close = ib_exact(spaces, SZ(">"));
ib_destroy(spaces);
ib_destroy(tagend_open);
ib_destroy(tagend_name);
ib_destroy(last);
last = tagend_close;
} else if (tag_close_empty.status == KIT_OK) {
ib_destroy(last);
last = ib_copy(tag_close_empty);
DA_INIT(tag.text, 0, alloc);
DA_INIT(tag.children, 0, alloc);
} else
last.status = KIT_ERROR_INTERNAL;
ib_t tag_tail = ib_until(last, SZ("<"));
ib_destroy(last);
last = ib_copy(tag_tail);
if (last.status == KIT_OK) {
i64 n = res.tags.size;
DA_RESIZE(res.tags, n + 1);
if (res.tags.size != n + 1) {
last.status = KIT_ERROR_BAD_ALLOC;
xml_destroy(&tag);
} else {
// move
tag.tag = tag_name.data;
memset(&tag_name.data, 0, sizeof tag_name.data);
// move
tag.tail = tag_tail.data;
memset(&tag_tail.data, 0, sizeof tag_tail.data);
res.tags.values[n] = tag;
}
} else
xml_destroy(&tag);
ib_destroy(tag_open);
ib_destroy(tag_name);
ib_destroy(tag_close);
ib_destroy(tag_close_empty);
ib_destroy(tag_tail);
}
if (last.status != KIT_OK) {
for (i64 i = 0; i < res.tags.size; i++)
xml_destroy(res.tags.values + i);
DA_DESTROY(res.text);
DA_DESTROY(res.tags);
} else {
// move
res.text = tag_text.data;
memset(&tag_text.data, 0, sizeof tag_text.data);
}
ib_destroy(tag_text);
res.last = last;
return res;
}
kit_xml_parse_result_t kit_xml_parse(kit_is_handle_t is,
kit_allocator_t *alloc) {
ib_t ib = ib_wrap(is, alloc);
kit_xml_intermediate_t im = kit_xml_parse_buf_(ib, alloc);
ib_destroy(ib);
kit_xml_parse_result_t res;
memset(&res, 0, sizeof res);
res.status = im.last.status;
ib_destroy(im.last);
if (res.status != KIT_OK)
return res;
if (im.text.size == 0 && im.tags.size == 1) {
res.xml = im.tags.values[0];
DA_DESTROY(im.text);
DA_DESTROY(im.tags);
return res;
}
DA_INIT(res.xml.tag, 0, alloc);
DA_INIT(res.xml.tail, 0, alloc);
DA_INIT(res.xml.properties, 0, alloc);
res.xml.text = im.text;
res.xml.children = im.tags;
return res;
}
kit_xml_print_result_t kit_xml_print(kit_xml_t *xml,
kit_allocator_t *alloc) {
assert(xml != NULL);
kit_xml_print_result_t result;
memset(&result, 0, sizeof result);
result.status = KIT_ERROR_NOT_IMPLEMENTED;
return result;
}
void kit_xml_destroy(kit_xml_t *xml) {
assert(xml != NULL);
if (xml == NULL)
return;
for (i64 i = 0; i < xml->properties.size; i++) {
DA_DESTROY(xml->properties.values[i].name);
DA_DESTROY(xml->properties.values[i].value);
}
for (i64 i = 0; i < xml->children.size; i++)
kit_xml_destroy(xml->children.values + i);
DA_DESTROY(xml->tag);
DA_DESTROY(xml->text);
DA_DESTROY(xml->tail);
DA_DESTROY(xml->properties);
DA_DESTROY(xml->children);
}
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