refactor dependencies; include dependencies source code

1 files changed, 437 insertions, 0 deletions

diff --git a/source/kit/xml.c b/source/kit/xml.c
new file mode 100644
index 0000000..c62ee82
--- /dev/null
+++ b/source/kit/xml.c
@@ -0,0 +1,437 @@
+#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_status_t kit_xml_unescape_(str_builder_t *str) {
+  assert(str != NULL);
+
+  str_builder_t buf;
+  DA_INIT(buf, str->size, str->alloc);
+  buf.size = 0;
+
+  for (i64 i = 0; i < str->size; i++)
+    if (str->values[i] != '&')
+      buf.values[buf.size++] = str->values[i];
+    else {
+      i64 n = 1;
+      while (i + n < str->size && str->values[i + n] != ';') n++;
+      if (i + n >= str->size) {
+        DA_DESTROY(buf);
+        return KIT_ERROR_INTERNAL;
+      }
+      if (n == 3 && memcmp(str->values + i, "&lt;", 4) == 0)
+        buf.values[buf.size++] = '<';
+      else if (n == 3 && memcmp(str->values + i, "&gt;", 4) == 0)
+        buf.values[buf.size++] = '>';
+      else if (n == 4 && memcmp(str->values + i, "&amp;", 5) == 0)
+        buf.values[buf.size++] = '&';
+      else if (n == 5 && memcmp(str->values + i, "&quot;", 6) == 0)
+        buf.values[buf.size++] = '"';
+      else if (n == 5 && memcmp(str->values + i, "&apos;", 6) == 0)
+        buf.values[buf.size++] = '\'';
+      else {
+        DA_DESTROY(buf);
+        return KIT_ERROR_INTERNAL;
+      }
+      i += n;
+    }
+
+  DA_DESTROY(*str);
+  *str = buf;
+
+  return KIT_OK;
+}
+
+static ib_t kit_xml_parse_text_(ib_t begin) {
+  ib_t text = ib_until(begin, SZ("<"));
+  ib_t last = ib_copy(text);
+
+  for (;;) {
+    ib_t comment_open = ib_exact(last, SZ("<!--"));
+
+    if (comment_open.status != KIT_OK) {
+      ib_destroy(comment_open);
+      break;
+    }
+
+    ib_t comment_text  = ib_until(comment_open, SZ("-->"));
+    ib_t comment_close = ib_exact(comment_text, SZ("-->"));
+    ib_t next_text     = ib_until(comment_close, SZ("<"));
+
+    if (next_text.status == KIT_OK && next_text.data.size > 0) {
+      i64 n = text.data.size;
+      DA_RESIZE(text.data, n + next_text.data.size);
+
+      assert(text.data.size == n + next_text.data.size);
+      if (text.data.size != n + next_text.data.size)
+        next_text.status = KIT_ERROR_BAD_ALLOC;
+      else
+        memcpy(text.data.values + n, next_text.data.values,
+               next_text.data.size);
+    }
+
+    ib_destroy(last);
+    last = ib_copy(next_text);
+
+    ib_destroy(comment_open);
+    ib_destroy(comment_text);
+    ib_destroy(comment_close);
+    ib_destroy(next_text);
+  }
+
+  //  move
+  DA_DESTROY(last.data);
+  last.data = text.data;
+  memset(&text.data, 0, sizeof text.data);
+
+  kit_status_t s = kit_xml_unescape_(&last.data);
+  if (s != KIT_OK)
+    last.status = s;
+
+  ib_destroy(text);
+
+  return last;
+}
+
+static ib_t kit_xml_parse_string_(ib_t begin) {
+  ib_t quotes_open = ib_exact(begin, SZ("\""));
+  ib_t apostr_open = ib_exact(begin, SZ("'"));
+
+  ib_t open = quotes_open.status == KIT_OK ? quotes_open
+                                           : apostr_open;
+
+  ib_t text  = ib_until(open, WRAP_STR(open.data));
+  ib_t close = ib_exact(text, WRAP_STR(open.data));
+
+  //  move
+  DA_DESTROY(close.data);
+  close.data = text.data;
+  memset(&text.data, 0, sizeof text.data);
+
+  kit_status_t s = kit_xml_unescape_(&close.data);
+  if (s == KIT_OK)
+    close.status = s;
+
+  ib_destroy(quotes_open);
+  ib_destroy(apostr_open);
+  ib_destroy(text);
+
+  return close;
+}
+
+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 = kit_xml_parse_text_(begin);
+  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);
+
+    ib_t decl_open = ib_exact(tag_open, SZ("?"));
+
+    ib_destroy(last);
+
+    if (decl_open.status == KIT_OK) {
+      tag.is_declaration = 1;
+      last               = ib_copy(decl_open);
+    } else
+      last = ib_copy(tag_open);
+
+    ib_destroy(decl_open);
+
+    spaces        = ib_any(last, 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 = kit_xml_parse_string_(spaces);
+      ib_destroy(spaces);
+
+      ib_destroy(last);
+      last = ib_copy(value);
+
+      if (last.status == KIT_OK) {
+        i64 n = tag.properties.size;
+        DA_RESIZE(tag.properties, n + 1);
+
+        assert(tag.properties.size == 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.data;
+          memset(&value.data, 0, sizeof value.data);
+        }
+      }
+
+      ib_destroy(property);
+      ib_destroy(equals);
+      ib_destroy(value);
+    }
+
+    spaces = ib_any(last, SZ(" \t\r\n"));
+
+    if (tag.is_declaration) {
+      ib_t tag_decl_close = ib_exact(spaces, SZ("?>"));
+      ib_destroy(spaces);
+
+      ib_destroy(last);
+      last = tag_decl_close;
+
+      DA_INIT(tag.text, 0, alloc);
+      DA_INIT(tag.children, 0, alloc);
+    } else {
+      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_destroy(tag_close);
+      ib_destroy(tag_close_empty);
+    }
+
+    ib_t tag_tail = kit_xml_parse_text_(last);
+
+    ib_destroy(last);
+    last = ib_copy(tag_tail);
+
+    if (last.status == KIT_OK) {
+      i64 n = res.tags.size;
+      DA_RESIZE(res.tags, n + 1);
+
+      assert(res.tags.size == 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_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_text_t kit_xml_print(kit_xml_t *xml, kit_allocator_t *alloc) {
+  assert(xml != NULL);
+
+  xml_text_t result;
+  memset(&result, 0, sizeof result);
+
+  result.status = KIT_ERROR_NOT_IMPLEMENTED;
+  return result;
+}
+
+static kit_status_t kit_xml_append_text_(str_builder_t *buf,
+                                         xml_t         *xml) {
+  assert(buf != NULL);
+  assert(xml != NULL);
+
+  i64 n = buf->size;
+  DA_RESIZE(*buf, n + xml->text.size);
+
+  assert(buf->size == n + xml->text.size);
+  if (buf->size != n + xml->text.size)
+    return KIT_ERROR_BAD_ALLOC;
+
+  if (xml->text.size > 0)
+    memcpy(buf->values + n, xml->text.values, xml->text.size);
+
+  for (i64 i = 0; i < xml->children.size; i++) {
+    kit_status_t s = kit_xml_append_text_(buf,
+                                          xml->children.values + i);
+    if (s != KIT_OK)
+      return s;
+
+    str_t tail = WRAP_STR(xml->children.values[i].tail);
+
+    if (tail.size <= 0)
+      continue;
+
+    n = buf->size;
+    DA_RESIZE(*buf, n + tail.size);
+
+    assert(buf->size == n + tail.size);
+    if (buf->size != n + tail.size)
+      return KIT_ERROR_BAD_ALLOC;
+
+    if (tail.size > 0)
+      memcpy(buf->values + n, tail.values, tail.size);
+  }
+
+  return KIT_OK;
+}
+
+kit_xml_text_t kit_xml_full_text(kit_xml_t       *xml,
+                                 kit_allocator_t *alloc) {
+  kit_xml_text_t res;
+  res.status = KIT_OK;
+  DA_INIT(res.text, 0, alloc);
+
+  if (xml != NULL)
+    res.status = kit_xml_append_text_(&res.text, xml);
+  else
+    res.status = KIT_ERROR_INVALID_ARGUMENT;
+
+  return res;
+}
+
+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);
+}