Added XML Parser.

include/dawn/dawn.h

@@ -34,6 +34,7 @@
 // File / Asset Management
 #include "file/asset.h"
 #include "file/csv.h"
+#include "file/xml.h"
 
 // Game Logic
 #include "game/game.h"

include/dawn/file/xml.h

@@ -0,0 +1,35 @@
+// Copyright (c) 2021 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "../libs.h"
+
+#define XML_DOING_NOTHING 0x00
+#define XML_PARSING_TAG_NAME 0x01
+#define XML_LOOKING_FOR_ATTRIBUTE 0x02
+#define XML_PARSING_ATTRIBUTE_NAME 0x03
+#define XML_LOOKING_FOR_ATTRIBUTE_VALUE 0x04
+#define XML_PARSING_ATTRIBUTE_VALUE 0x05
+#define XML_PARSING_VALUE 0x06
+#define XML_PARSING_CHILD 0x07
+#define XML_PARSING_CLOSE 0x08
+
+#define XML_TEXT_BUFFER_MAX 256
+#define XML_CHILD_COUNT_MAX 16
+#define XML_ATTRIBUTE_MAX 16
+
+typedef struct _xml_t xml_t;
+
+typedef struct _xml_t {
+  char *node;
+  char *value;
+
+  char *attributeNames[XML_ATTRIBUTE_MAX];
+  char *attributeDatas[XML_ATTRIBUTE_MAX];
+  uint8_t attributeCount;
+
+  xml_t *children;
+  uint8_t childrenCount;
+} xml_t;

src/file/xml.c

@@ -0,0 +1,193 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "xml.h"
+
+int32_t xmlLoadChild(xml_t *xml, char *data, int32_t i) {
+  char c;
+  int32_t level = 0;
+  uint8_t doing = XML_DOING_NOTHING;
+  bool insideTag = false;
+  char* buffer = malloc(sizeof(char) * XML_TEXT_BUFFER_MAX);
+  int32_t bufferLength = 0;
+
+  xml->value = NULL;
+  xml->attributeCount = 0;
+
+  xml->children = malloc(sizeof(xml_t) * XML_CHILD_COUNT_MAX);
+  xml->childrenCount = 0;
+
+  while(c = data[i++]) {
+    switch(doing) {
+      case XML_DOING_NOTHING:
+        // Look for either an opening tag (<) or a word for a value.
+        if(c == '>') continue;
+        if(c == '<') {
+          if(insideTag) {
+            i = xmlLoadChild(xml->children + xml->childrenCount++, data, i-1);
+            doing = XML_PARSING_CHILD;
+          } else {
+            doing = XML_PARSING_TAG_NAME;
+            level++;
+            insideTag = true;
+          }
+          continue;
+        }
+
+        if(c == ' ' || c == '\n' || c == '\r') continue;
+        doing = XML_PARSING_VALUE;
+        buffer[bufferLength++] = c;
+        break;
+      
+      case XML_PARSING_TAG_NAME:
+        // Just keep reading until we either hit a space (end of the tag name)
+        // or a closing tag value, either / or >
+        if(c == ' ' || c == '\n' || c == '\r' || c == '>' || c == '/') {
+          buffer[bufferLength] = '\0';
+          xml->node = buffer;
+          buffer = malloc(sizeof(char) * XML_TEXT_BUFFER_MAX);
+          bufferLength = 0;
+          if(c == '/') {
+            level--;
+            insideTag = false;
+          }
+          doing = c == '>' ? XML_DOING_NOTHING : XML_LOOKING_FOR_ATTRIBUTE;
+          continue;
+        }
+        buffer[bufferLength++] = c;
+        break;
+      
+      case XML_LOOKING_FOR_ATTRIBUTE:
+        // Look until we hit either the end of a tag, or the attribute itself
+        if(c == ' '||c == '\n'||c == '\r'||c == '>'||c == '/'||c == '=') {
+          if(c == '>' || c == '/') {
+            doing = XML_DOING_NOTHING;
+            if(c == '/') {
+              level--;
+              insideTag = false;
+            }
+          } else if(c == '=') {
+            doing = XML_LOOKING_FOR_ATTRIBUTE_VALUE;
+          } else {
+            doing = XML_LOOKING_FOR_ATTRIBUTE;
+          }
+
+          if(bufferLength > 0) {
+            buffer[bufferLength] = '\0';
+            xml->attributeNames[xml->attributeCount++] = buffer;
+            xml->attributeDatas[xml->attributeCount] = NULL;
+            buffer = malloc(sizeof(char) * XML_TEXT_BUFFER_MAX);
+            bufferLength = 0;
+          }
+          continue;
+        }
+
+        buffer[bufferLength++] = c;
+        break;
+
+      case XML_LOOKING_FOR_ATTRIBUTE_VALUE:
+        // Keep looking until we find a quote mark
+        if(c == ' ' || c == '\n' || c == '\r') continue;
+        if(c == '>' || c == '/') {
+          doing = XML_DOING_NOTHING;
+          insideTag = false;
+          continue;
+        }
+
+        if(c != '"') continue;
+        doing = XML_PARSING_ATTRIBUTE_VALUE;
+        break;
+
+      case XML_PARSING_ATTRIBUTE_VALUE:
+        // Parse the attribute value until we find a quote mark.
+        if(c == '"') {
+          doing = XML_LOOKING_FOR_ATTRIBUTE;
+          buffer[bufferLength] = '\0';
+          xml->attributeDatas[xml->attributeCount - 1] = buffer;
+          buffer = malloc(sizeof(char) * XML_TEXT_BUFFER_MAX);
+          bufferLength = 0;
+          continue;
+        }
+
+        buffer[bufferLength++] = c;
+        break;
+
+      case XML_PARSING_VALUE:
+        // Keep parsing child until we find a < for an opening/closing tag.
+        if(c == '<') {
+          // In HTML Spec there could be a child here but not in XML spec.
+          doing = XML_PARSING_CLOSE;
+          buffer[bufferLength] = '\0';
+          bufferLength = 0;
+          xml->value = buffer;
+          buffer = malloc(sizeof(char) * XML_TEXT_BUFFER_MAX);
+          continue;
+        }
+
+        buffer[bufferLength++] = c;
+        break;
+        
+      case XML_PARSING_CHILD:
+        if(c == '<') {
+          // Read ahead and confirm this is a close or not
+          if(data[i] == '/') {
+            doing = XML_PARSING_CLOSE;
+            continue;
+          }
+
+          // Likely another child.
+          i = xmlLoadChild(xml->children + xml->childrenCount++, data, i-1);
+        }
+
+        if(c == '\n' || c == '\r' || c == ' ') {
+          continue;
+        }
+
+        // In HTML Spec there's a chance for there to be a value here, but not
+        // in the XML spec.
+
+        break;
+
+      case XML_PARSING_CLOSE:
+        // Just keep parsing until the tag closer finishes.
+        if(c != '>') continue;
+        doing = XML_DOING_NOTHING;
+        
+        //TODO: Return index or something?
+        return i;
+
+        break;
+
+      default:
+        break;
+    }
+  }
+}
+
+void xmlLoad(xml_t *xml, char *data) {
+  xmlLoadChild(xml, data, 0);
+}
+
+void xmlDispose(xml_t *xml) {
+  uint8_t i;
+
+  // Dispose children recursively
+  for(i = 0; i < xml->childrenCount; i++) {
+    xmlDispose(xml->children + i);
+  }
+
+  // Dispose attributes
+  for(i = 0; i < xml->attributeCount; i++) {
+    free(xml->attributeNames + i);
+    if((xml->attributeDatas + i) != NULL) {
+      free(xml->attributeDatas + i);
+    }
+  }
+  
+  free(xml->node);
+  if(xml-> value != NULL) free(xml->value);
+}

src/file/xml.h

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include <dawn/dawn.h>
+
+/**
+ * Load an XML child from a string buffer.
+ * 
+ * @param xml XML to load.
+ * @param data Data to parse
+ * @param i Character index within the data
+ * @return The index in the data string this XML node ends.
+ */
+int32_t xmlLoadChild(xml_t *xml, char *data, int32_t i);
+
+/**
+ * Load an XML String into an XML memory.
+ * 
+ * @param xml XML to load into.
+ * @param data XML string.
+ */
+void xmlLoad(xml_t *xml, char *data);
+
+/**
+ * Dispose a previously loaded XML.
+ * 
+ * @param xml XML to dispose.
+ */
+void xmlDispose(xml_t *xml);

src/game/sandbox/sandboxscene.c

@@ -15,6 +15,17 @@ bool sandboxSceneInit(sandboxscene_t *game) {
   assetShaderLoad(&game->shader, 
     "shaders/textured.vert", "shaders/textured.frag"
   );
+
+  xml_t xml;
+  xmlLoad(&xml, "<a><b>Hello World</b><b>Hello Bruh</b></a>", 0);
+
+  for(uint8_t i = 0; i < xml.childrenCount; i++) {
+    printf("Value: %s\n", xml.children[i].value);
+  }
+
+
+
+
   
   framedTextMenuInit(&menu, &game->font, &game->texture);
   

src/game/sandbox/sandboxscene.h

@@ -17,6 +17,8 @@
 #include "../../display/texture.h"
 #include "../../file/asset.h"
 
+#include "../../file/xml.h"
+
 #include "../../ui/grid.h"
 #include "../../ui/menuv2.h"
 #include "../../ui/textmenu.h"