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122 lines
5.0 KiB
C
122 lines
5.0 KiB
C
/*****************************************************************************/
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/* */
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/* input.c */
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/* */
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/* Input format/file definitions for the sp65 sprite and bitmap utility */
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/* */
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/* */
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/* */
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/* (C) 2012, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <stdlib.h>
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/* common */
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#include "fileid.h"
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/* sp65 */
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#include "attr.h"
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#include "error.h"
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#include "input.h"
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#include "pcx.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Possible input formats */
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enum InputFormat {
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ifPCX, /* PCX */
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ifCount /* Number of actual input formats w/o ifAuto*/
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};
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typedef struct InputFormatDesc InputFormatDesc;
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struct InputFormatDesc {
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/* Read routine */
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Bitmap* (*Read) (const Collection*);
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};
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/* Table with input formats indexed by InputFormat */
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static InputFormatDesc InputFormatTable[ifCount] = {
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{ ReadPCXFile },
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};
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/* Table that maps extensions to input formats. Must be sorted alphabetically */
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static const FileId FormatTable[] = {
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/* Upper case stuff for obsolete operating systems */
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{ "PCX", ifPCX },
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{ "pcx", ifPCX },
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};
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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Bitmap* ReadInputFile (const Collection* A)
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/* Read a bitmap from a file and return it. Format, file name etc. must be
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** given as attributes in A. If no format is given, the function tries to
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** autodetect it by using the extension of the file name.
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*/
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{
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const FileId* F;
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/* Get the file format from the command line */
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const char* Format = GetAttrVal (A, "format");
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if (Format != 0) {
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/* Format is given, search for it in the table. */
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F = bsearch (Format,
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FormatTable,
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sizeof (FormatTable) / sizeof (FormatTable[0]),
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sizeof (FormatTable[0]),
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CompareFileId);
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if (F == 0) {
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Error ("Unknown input format '%s'", Format);
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}
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} else {
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/* No format given, use file name extension */
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const char* Name = NeedAttrVal (A, "name", "write");
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F = GetFileId (Name, FormatTable,
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sizeof (FormatTable) / sizeof (FormatTable[0]));
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/* Found? */
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if (F == 0) {
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Error ("Cannot determine file format of input file '%s'", Name);
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}
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}
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/* Call the format specific read */
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return InputFormatTable[F->Id].Read (A);
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}
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