src/liblzma/common/raw_encoder.c

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       raw_encoder.c
   4 /// \brief      Raw encoder initialization API
   5 //
   6 //  Copyright (C) 2007 Lasse Collin
   7 //
   8 //  This library is free software; you can redistribute it and/or
   9 //  modify it under the terms of the GNU Lesser General Public
  10 //  License as published by the Free Software Foundation; either
  11 //  version 2.1 of the License, or (at your option) any later version.
  12 //
  13 //  This library is distributed in the hope that it will be useful,
  14 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 //  Lesser General Public License for more details.
  17 //
  18 ///////////////////////////////////////////////////////////////////////////////
  19
  20 #include "raw_encoder.h"
  21 #include "copy_coder.h"
  22 #include "simple_coder.h"
  23 #include "subblock_encoder.h"
  24 #include "delta_coder.h"
  25 #include "lzma_encoder.h"
  26
  27
  28 static lzma_init_function
  29 get_function(lzma_vli id)
  30 {
  31         switch (id) {
  32 #ifdef HAVE_FILTER_COPY
  33         case LZMA_FILTER_COPY:
  34                 return &lzma_copy_encoder_init;
  35 #endif
  36
  37 #ifdef HAVE_FILTER_SUBBLOCK
  38         case LZMA_FILTER_SUBBLOCK:
  39                 return &lzma_subblock_encoder_init;
  40 #endif
  41
  42 #ifdef HAVE_FILTER_X86
  43         case LZMA_FILTER_X86:
  44                 return &lzma_simple_x86_encoder_init;
  45 #endif
  46
  47 #ifdef HAVE_FILTER_POWERPC
  48         case LZMA_FILTER_POWERPC:
  49                 return &lzma_simple_powerpc_encoder_init;
  50 #endif
  51
  52 #ifdef HAVE_FILTER_IA64
  53         case LZMA_FILTER_IA64:
  54                 return &lzma_simple_ia64_encoder_init;
  55 #endif
  56
  57 #ifdef HAVE_FILTER_ARM
  58         case LZMA_FILTER_ARM:
  59                 return &lzma_simple_arm_encoder_init;
  60 #endif
  61
  62 #ifdef HAVE_FILTER_ARMTHUMB
  63         case LZMA_FILTER_ARMTHUMB:
  64                 return &lzma_simple_armthumb_encoder_init;
  65 #endif
  66
  67 #ifdef HAVE_FILTER_SPARC
  68         case LZMA_FILTER_SPARC:
  69                 return &lzma_simple_sparc_encoder_init;
  70 #endif
  71
  72 #ifdef HAVE_FILTER_DELTA
  73         case LZMA_FILTER_DELTA:
  74                 return &lzma_delta_encoder_init;
  75 #endif
  76
  77 #ifdef HAVE_FILTER_LZMA
  78         case LZMA_FILTER_LZMA:
  79                 return &lzma_lzma_encoder_init;
  80 #endif
  81         }
  82
  83         return NULL;
  84 }
  85
  86
  87 extern lzma_ret
  88 lzma_raw_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
  89                 const lzma_options_filter *options,
  90                 lzma_vli uncompressed_size, bool allow_implicit)
  91 {
  92         // lzma_raw_coder_init() accesses get_function() via function pointer,
  93         // because this way linker doesn't statically link both encoder and
  94         // decoder functions if user needs only encoder or decoder.
  95         const lzma_ret ret = lzma_raw_coder_init(next, allocator,
  96                         options, uncompressed_size, &get_function,
  97                         allow_implicit, true);
  98
  99         if (ret != LZMA_OK)
 100                 lzma_next_coder_end(next, allocator);
 101
 102         return ret;
 103 }
 104
 105
 106 extern LZMA_API lzma_ret
 107 lzma_raw_encoder(lzma_stream *strm, const lzma_options_filter *options,
 108                 lzma_vli uncompressed_size, lzma_bool allow_implicit)
 109 {
 110         return_if_error(lzma_strm_init(strm));
 111
 112         strm->internal->supported_actions[LZMA_RUN] = true;
 113         strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
 114         strm->internal->supported_actions[LZMA_FINISH] = true;
 115
 116         const lzma_ret ret = lzma_raw_coder_init(&strm->internal->next,
 117                         strm->allocator, options, uncompressed_size,
 118                         &get_function, allow_implicit, true);
 119
 120         if (ret != LZMA_OK)
 121                 lzma_end(strm);
 122
 123         return ret;
 124 }