Generalized the handlebars code.

src/util/string.c

@@ -0,0 +1,100 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "string.h"
+
+int32_t stringHandlebarsBuffer(char *source,
+  stringhandlebarvariable_t *variables, int32_t variableCount, char *buffer
+) {
+  
+  int32_t i, l, n;
+  char c;
+  char keyBuffer[STRING_HANDLEBAR_KEY_MAXLENGTH];
+  stringhandlebarvariable_t *variable;
+
+  // Start two counters. I holds source index, L holds target index.
+  i = 0;
+  l = 0;
+
+  while(true) {
+    c = source[i];
+    if(c == '\0') break;// Break on end of string.
+
+    // Look for {{, if not {{ then just treat as normal string.
+    if(c != '{' || source[i + 1] != '{') {
+      buffer[l] = c;
+      i++;
+      l++;
+      continue;
+    }
+
+    //Ignore those two chars
+    i += 2;
+
+    // Skip space(s)
+    while(true) {
+      c = source[i];
+      if(c != ' ') break;
+      i++;
+    }
+
+    // Get the key name
+    n = 0;// Will hold the index within keyBuffer to copy chars into.
+    while(true) {
+      c = source[i];
+
+      // Don't overflow
+      if(c == '\0') break;
+      
+      // Skip spaces
+      if(c == ' ') {
+        i++;
+        continue;
+      }
+
+      // Handle end of key
+      if(c == '}') {
+        i++;
+        if(source[i] == '}') i++;// For }} then skip the second }
+        break;
+      }
+
+      // Add to buffer.
+      keyBuffer[n] = c;
+      n++;
+      i++;
+    }
+
+    // Seal the keyBuffer string
+    keyBuffer[n] = '\0';
+
+    // Now check each variable for a match.
+    for(n = 0; n < variableCount; n++) {
+      variable = variables + n;
+      if(strcmp(keyBuffer, variable->key) != 0) continue;// Does the key match?
+
+      // Begin copying the variables' value into the string.
+      n = 0;
+      while(true) {
+        if(variable->value[n] == '\0') break;// Handle end of variable value
+        buffer[l] = variable->value[n];
+        l++;
+        n++;
+      }
+      // We found the value, so break.
+      break;
+    }
+
+    // Continue looking for next {{ variable }}...
+  }
+
+  // Buffer has been fully cloned, seal the string.
+  buffer[l] = '\0';
+
+  // Return the count of chars we wrote to the buffer. -1 due to null term.
+  return l - 1;
+}

src/util/string.h

@@ -0,0 +1,24 @@
+// Copyright (c) 2021 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include <dawn/dawn.h>
+
+/**
+ * Replaces handlebars within the string with items from the list of variables.
+ * Output of replacement is stored in the buffer provided. Handlebars within the
+ * string should be in the format of; "{{ key }}", spaces within the bars will
+ * be skipped. Variable keys cannot exceed STRING_HANDLEBAR_KEY_MAXLENGTH in
+ * length.
+ * 
+ * @param string String to parse.
+ * @param variables Variables to use in the parsing.
+ * @param variableCount How many variables in the array.
+ * @param buffer Buffer to write characters in to.
+ * @return The count of characters that were written to the buffer.
+ */
+int32_t stringHandlebarsBuffer(char *source,
+  stringhandlebarvariable_t *variables, int32_t variableCount, char *buffer
+);