1 files changed, 82 insertions, 0 deletions
diff --git a/packassets.c b/packassets.c
new file mode 100644
index 0000000..5b31b0d
--- /dev/null
+++ b/packassets.c
@@ -0,0 +1,82 @@
+#include "error.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#define buffer_size 256
+#define filename "pack"
+
+typedef struct {
+	int size;
+	int offset;
+	char name[56];
+} Entry;
+
+int main(int argc, char** argv) {
+	int i, j, file_count, blob_offset, read, head_size;
+	char buffer[buffer_size];
+	char name[56];
+	const char* workingdir, * dsep = "";
+	Entry entry;
+	FILE* outfile, * infile;
+
+	outfile = fopen(filename, "wb");
+	if (!outfile) {
+		fprintf(
+			stderr,
+			"Failed to open '%s' for writing.\n",
+			filename
+		);
+		return error_file_not_found;
+	}
+
+	file_count = argc - 2;
+	head_size = 8;
+	blob_offset = head_size + file_count * sizeof entry;
+	workingdir = argv[1];
+	if (workingdir[strlen(workingdir) - 1] != '/')
+		dsep = "/";
+
+	fwrite(&file_count,  4, 1, outfile);
+	fwrite(&blob_offset, 4, 1, outfile);
+
+	entry.offset = blob_offset;
+
+	for (i = 0; i < file_count; i++) {
+		strcpy(entry.name, argv[i + 2]);
+		strcpy(name, workingdir);
+		strcat(name, dsep);
+		strcat(name, entry.name);
+
+		infile = fopen(name, "rb");
+		if (!infile) {
+			fprintf(
+				stderr,
+				"Failed to open '%s' for reading.\n",
+				entry.name
+			);
+			return error_file_not_found;
+		}
+
+		fseek(infile, 0, SEEK_END);
+		entry.size = ftell(infile);
+		rewind(infile);
+
+		fseek(outfile, head_size + i * sizeof entry, SEEK_SET);
+		fwrite(&entry, 1, sizeof entry, outfile);
+
+		fseek(outfile, entry.offset, SEEK_SET);
+		for (j = 0; j < entry.size; j += buffer_size) {
+			read = fread(buffer, 1, buffer_size, infile);
+			fwrite(buffer, 1, read, outfile);
+		}
+
+		entry.offset += entry.size;
+
+		fclose(infile);
+	}
+
+	fclose(outfile);
+
+	return error_none;
+}