[api] Simple JSON encoding for strings, UTF-8 rather than Unicode

src/json_encode.c

@@ -0,0 +1,41 @@
+#include "json_encode.h"
+
+char *json_encode_string(char *str) {
+    char *ptr = str;
+    char_array *json_encoded = char_array_new_size(strlen(str) + 2);
+    char_array_push(json_encoded, '"');
+
+    while (*ptr) {
+        char ch = *ptr;
+        switch (ch) {
+            case '\\':
+                char_array_append(json_encoded, "\\\\");
+                break;
+            case '"':
+                char_array_append(json_encoded, "\\\"");
+                break;
+            case '\n':
+                char_array_append(json_encoded, "\\n");
+                break;
+            case '\r':
+                char_array_append(json_encoded, "\\r");
+                break;
+            case '\t':
+                char_array_append(json_encoded, "\\t");
+                break;
+            case '\b':
+                char_array_append(json_encoded, "\\\b");
+                break;
+            case '\f':
+                char_array_append(json_encoded, "\\\f");
+                break;
+            default:
+                char_array_push(json_encoded, ch);
+        }
+        ptr++;
+    }
+    char_array_push(json_encoded, '"');
+    char_array_terminate(json_encoded);
+
+    return char_array_to_string(json_encoded);
+}

src/json_encode.h

@@ -0,0 +1,14 @@
+#ifndef JSON_ENCODE_H
+#define JSON_ENCODE_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "collections.h"
+#include "string_utils.h"
+#include "utf8proc/utf8proc.h"
+
+char *json_encode_string(char *str);
+
+#endif