Unified compression interfaces

src/lib/compress.h

@@ -0,0 +1,36 @@
+/**
+ * Necronda Web Server
+ * Compression interface (header file)
+ * src/lib/compress.h
+ * Lorenz Stechauner, 2021-05-05
+ */
+
+#ifndef NECRONDA_SERVER_COMPRESS_H
+#define NECRONDA_SERVER_COMPRESS_H
+
+#include <zlib.h>
+#include <brotli/encode.h>
+
+#define COMPRESS_LEVEL_GZIP 9
+#define COMPRESS_LEVEL_BROTLI BROTLI_MAX_QUALITY
+
+#define COMPRESS_GZ 1
+#define COMPRESS_BR 2
+
+typedef struct {
+    int mode;
+    z_stream *gzip;
+    BrotliEncoderState *brotli;
+} compress_ctx;
+
+int compress_init(compress_ctx *ctx, int mode);
+
+int compress_compress(compress_ctx *ctx, const char *in, unsigned long *in_len, char *out, unsigned long *out_len,
+                      int finish);
+
+int compress_compress_mode(compress_ctx *ctx, int mode, const char *in, unsigned long *in_len, char *out,
+                           unsigned long *out_len, int finish);
+
+int compress_free(compress_ctx *ctx);
+
+#endif //NECRONDA_SERVER_COMPRESS_H