From e35cff6d299a07d9b34f303717083a9299a37e82 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Mon, 28 Aug 2023 15:16:12 +0100
Subject: Initial import

---
 src/assets.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/assets.c

(limited to 'src/assets.c')

diff --git a/src/assets.c b/src/assets.c
new file mode 100644
index 0000000..cfeeb20
--- /dev/null
+++ b/src/assets.c
@@ -0,0 +1,98 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "miniz.h"
+
+#include "ubox_debug.h"
+#include "ubox_assets.h"
+
+#define EXT "pak"
+
+static char *base = NULL;
+static uint8_t has_zip = 0;
+static mz_zip_archive zip;
+
+uint8_t ubox_assets_init(const char *dirname)
+{
+    char buff[256];
+
+    base = (char *)calloc(strlen(dirname) + 1, 1);
+    if (!base)
+        return 0;
+    strcpy(base, dirname);
+
+    UBOX_DEBUG_LOG("%s: resources base\n", base);
+
+    snprintf(buff, 255, "%s." EXT, base);
+
+    memset(&zip, 0, sizeof(zip));
+    if (mz_zip_reader_init_file(&zip, buff, 0))
+        has_zip = 1;
+
+    UBOX_DEBUG_LOG("%s: open %d\n", buff, has_zip);
+
+    return 1;
+}
+
+uint8_t ubox_assets_read(const char *name, char **data, size_t *data_size)
+{
+    char buff[256];
+    FILE *fd;
+
+    /* check directory first */
+    snprintf(buff, 255, "%s/%s", base, name);
+    fd = fopen(buff, "rb");
+    if (fd)
+    {
+        UBOX_DEBUG_LOG("%s: file resource\n", buff);
+
+        fseek(fd, 0, SEEK_END);
+        *data_size = ftell(fd);
+        (*data) = (char *)calloc(*data_size, 1);
+        if (!(*data))
+            goto error_close;
+
+        fseek(fd, 0, SEEK_SET);
+        if (fread(*data, 1, *data_size, fd) == *data_size)
+        {
+            UBOX_DEBUG_LOG("%s: %li bytes\n", buff, *data_size);
+            return 1;
+        }
+
+        free(*data);
+error_close:
+        (*data) = NULL;
+        *data_size = 0;
+        fclose(fd);
+    }
+
+    /* then check the archive if open */
+    if (has_zip)
+    {
+        *data = mz_zip_reader_extract_file_to_heap(&zip, name, data_size, 0);
+        if (*data)
+        {
+            UBOX_DEBUG_LOG("%s: " EXT " resource, %li bytes\n", buff, *data_size);
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+void ubox_assets_free()
+{
+    if (base)
+    {
+        free(base);
+        base = NULL;
+    }
+
+    if (has_zip)
+    {
+        mz_zip_reader_end(&zip);
+        has_zip = 0;
+    }
+}
-- 
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