Added lzma_easy_buffer_encode(). Splitted easy.c into small

pieces to avoid unneeded dependencies making statically
linked applications bigger than needed.

6 files changed, 175 insertions, 47 deletions

diff --git a/src/liblzma/common/easy_buffer_encoder.c b/src/liblzma/common/easy_buffer_encoder.c
new file mode 100644
index 00000000..4d909ee4
--- /dev/null
+++ b/src/liblzma/common/easy_buffer_encoder.c
@@ -0,0 +1,34 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       easy_buffer_encoder.c
+/// \brief      Easy single-call .xz Stream encoder
+//
+//  Copyright (C) 2009 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern LZMA_API(lzma_ret)
+lzma_easy_buffer_encode(uint32_t preset, lzma_check check,
+		lzma_allocator *allocator, const uint8_t *in, size_t in_size,
+		uint8_t *out, size_t *out_pos, size_t out_size)
+{
+	lzma_options_easy opt_easy;
+	if (lzma_easy_preset(&opt_easy, preset))
+		return LZMA_OPTIONS_ERROR;
+
+	return lzma_stream_buffer_encode(opt_easy.filters, check,
+			allocator, in, in_size, out, out_pos, out_size);
+}
diff --git a/src/liblzma/common/easy_decoder_memusage.c b/src/liblzma/common/easy_decoder_memusage.c
new file mode 100644
index 00000000..be84241a
--- /dev/null
+++ b/src/liblzma/common/easy_decoder_memusage.c
@@ -0,0 +1,31 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       easy_decoder_memusage.c
+/// \brief      Decoder memory usage calculation to match easy encoder presets
+//
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern LZMA_API(uint64_t)
+lzma_easy_decoder_memusage(uint32_t preset)
+{
+	lzma_options_easy opt_easy;
+	if (lzma_easy_preset(&opt_easy, preset))
+		return UINT32_MAX;
+
+	return lzma_raw_decoder_memusage(opt_easy.filters);
+}
diff --git a/src/liblzma/common/easy.c b/src/liblzma/common/easy_encoder.c
index 8147a5b5..4a6709c6 100644
--- a/src/liblzma/common/easy.c
+++ b/src/liblzma/common/easy_encoder.c
@@ -1,7 +1,7 @@
 ///////////////////////////////////////////////////////////////////////////////
 //
-/// \file       easy.c
-/// \brief      Easy Stream encoder initialization
+/// \file       easy_encoder.c
+/// \brief      Easy .xz Stream encoder initialization
 //
 //  Copyright (C) 2008 Lasse Collin
 //
@@ -17,35 +17,16 @@
 //
 ///////////////////////////////////////////////////////////////////////////////
 
+#include "easy_preset.h"
 #include "stream_encoder.h"
 
 
 struct lzma_coder_s {
 	lzma_next_coder stream_encoder;
-
-	/// Options for LZMA2
-	lzma_options_lzma opt_lzma;
-
-	/// We need to keep the filters array available in case
-	/// LZMA_FULL_FLUSH is used.
-	lzma_filter filters[LZMA_FILTERS_MAX + 1];
+	lzma_options_easy opt_easy;
 };
 
 
-static bool
-easy_set_filters(lzma_coder *coder, uint32_t preset)
-{
-	if (lzma_lzma_preset(&coder->opt_lzma, preset))
-		return true;
-
-	coder->filters[0].id = LZMA_FILTER_LZMA2;
-	coder->filters[0].options = &coder->opt_lzma;
-	coder->filters[1].id = LZMA_VLI_UNKNOWN;
-
-	return false;
-}
-
-
 static lzma_ret
 easy_encode(lzma_coder *coder, lzma_allocator *allocator,
 		const uint8_t *restrict in, size_t *restrict in_pos,
@@ -84,11 +65,11 @@ easy_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
 		next->coder->stream_encoder = LZMA_NEXT_CODER_INIT;
 	}
 
-	if (easy_set_filters(next->coder, preset))
+	if (lzma_easy_preset(&next->coder->opt_easy, preset))
 		return LZMA_OPTIONS_ERROR;
 
 	return lzma_stream_encoder_init(&next->coder->stream_encoder,
-			allocator, next->coder->filters, check);
+			allocator, next->coder->opt_easy.filters, check);
 }
 
 
@@ -104,25 +85,3 @@ lzma_easy_encoder(lzma_stream *strm, uint32_t preset, lzma_check check)
 
 	return LZMA_OK;
 }
-
-
-extern LZMA_API(uint64_t)
-lzma_easy_encoder_memusage(uint32_t preset)
-{
-	lzma_coder coder;
-	if (easy_set_filters(&coder, preset))
-		return UINT32_MAX;
-
-	return lzma_raw_encoder_memusage(coder.filters);
-}
-
-
-extern LZMA_API(uint64_t)
-lzma_easy_decoder_memusage(uint32_t preset)
-{
-	lzma_coder coder;
-	if (easy_set_filters(&coder, preset))
-		return UINT32_MAX;
-
-	return lzma_raw_decoder_memusage(coder.filters);
-}
diff --git a/src/liblzma/common/easy_encoder_memusage.c b/src/liblzma/common/easy_encoder_memusage.c
new file mode 100644
index 00000000..6f4154a8
--- /dev/null
+++ b/src/liblzma/common/easy_encoder_memusage.c
@@ -0,0 +1,31 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       easy_encoder_memusage.c
+/// \brief      Easy .xz Stream encoder memory usage calculation
+//
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern LZMA_API(uint64_t)
+lzma_easy_encoder_memusage(uint32_t preset)
+{
+	lzma_options_easy opt_easy;
+	if (lzma_easy_preset(&opt_easy, preset))
+		return UINT32_MAX;
+
+	return lzma_raw_encoder_memusage(opt_easy.filters);
+}
diff --git a/src/liblzma/common/easy_preset.c b/src/liblzma/common/easy_preset.c
new file mode 100644
index 00000000..d7f950c1
--- /dev/null
+++ b/src/liblzma/common/easy_preset.c
@@ -0,0 +1,34 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       easy_preset.c
+/// \brief      Preset handling for easy encoder and decoder
+//
+//  Copyright (C) 2008 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "easy_preset.h"
+
+
+extern bool
+lzma_easy_preset(lzma_options_easy *opt_easy, uint32_t preset)
+{
+	if (lzma_lzma_preset(&opt_easy->opt_lzma, preset))
+		return true;
+
+	opt_easy->filters[0].id = LZMA_FILTER_LZMA2;
+	opt_easy->filters[0].options = &opt_easy->opt_lzma;
+	opt_easy->filters[1].id = LZMA_VLI_UNKNOWN;
+
+	return false;
+}
diff --git a/src/liblzma/common/easy_preset.h b/src/liblzma/common/easy_preset.h
new file mode 100644
index 00000000..e8671fe2
--- /dev/null
+++ b/src/liblzma/common/easy_preset.h
@@ -0,0 +1,39 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       easy_preset.h
+/// \brief      Preset handling for easy encoder and decoder
+//
+//  Copyright (C) 2009 Lasse Collin
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//  Lesser General Public License for more details.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+typedef struct {
+	/// We need to keep the filters array available in case
+	/// LZMA_FULL_FLUSH is used.
+	lzma_filter filters[LZMA_FILTERS_MAX + 1];
+
+	/// Options for LZMA2
+	lzma_options_lzma opt_lzma;
+
+	// Options for more filters can be added later, so this struct
+	// is not ready to be put into the public API.
+
+} lzma_options_easy;
+
+
+/// Set *easy to the settings given by the preset. Returns true on error,
+/// false on success.
+extern bool lzma_easy_preset(lzma_options_easy *easy, uint32_t preset);