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| Rev | Author | Line No. | Line |
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| 6417 | ashmew2 | 1 | /* |
| 2 | * jinclude.h |
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| 3 | * |
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| 4 | * Copyright (C) 1991-1994, Thomas G. Lane. |
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| 5 | * This file is part of the Independent JPEG Group's software. |
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| 6 | * For conditions of distribution and use, see the accompanying README file. |
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| 7 | * |
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| 8 | * This file exists to provide a single place to fix any problems with |
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| 9 | * including the wrong system include files. (Common problems are taken |
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| 10 | * care of by the standard jconfig symbols, but on really weird systems |
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| 11 | * you may have to edit this file.) |
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| 12 | * |
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| 13 | * NOTE: this file is NOT intended to be included by applications using the |
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| 14 | * JPEG library. Most applications need only include jpeglib.h. |
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| 15 | */ |
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| 16 | |||
| 17 | |||
| 18 | /* Include auto-config file to find out which system include files we need. */ |
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| 19 | |||
| 20 | #include "jconfig.h" /* auto configuration options */ |
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| 21 | #define JCONFIG_INCLUDED /* so that jpeglib.h doesn't do it again */ |
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| 22 | |||
| 23 | /* |
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| 24 | * We need the NULL macro and size_t typedef. |
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| 25 | * On an ANSI-conforming system it is sufficient to include |
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| 26 | * Otherwise, we get them from |
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| 27 | * pull in |
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| 28 | * Note that the core JPEG library does not require |
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| 29 | * only the default error handler and data source/destination modules do. |
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| 30 | * But we must pull it in because of the references to FILE in jpeglib.h. |
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| 31 | * You can remove those references if you want to compile without |
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| 32 | */ |
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| 33 | |||
| 34 | #ifdef HAVE_STDDEF_H |
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| 35 | #include |
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| 36 | #endif |
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| 37 | |||
| 38 | #ifdef HAVE_STDLIB_H |
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| 39 | #include |
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| 40 | #endif |
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| 41 | |||
| 42 | #ifdef NEED_SYS_TYPES_H |
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| 43 | #include |
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| 44 | #endif |
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| 45 | |||
| 46 | #include |
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| 47 | |||
| 48 | /* |
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| 49 | * We need memory copying and zeroing functions, plus strncpy(). |
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| 50 | * ANSI and System V implementations declare these in |
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| 51 | * BSD doesn't have the mem() functions, but it does have bcopy()/bzero(). |
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| 52 | * Some systems may declare memset and memcpy in |
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| 53 | * |
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| 54 | * NOTE: we assume the size parameters to these functions are of type size_t. |
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| 55 | * Change the casts in these macros if not! |
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| 56 | */ |
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| 57 | |||
| 58 | #ifdef NEED_BSD_STRINGS |
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| 59 | |||
| 60 | #include |
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| 61 | #define MEMZERO(target,size) bzero((void *)(target), (size_t)(size)) |
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| 62 | #define MEMCOPY(dest,src,size) bcopy((const void *)(src), (void *)(dest), (size_t)(size)) |
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| 63 | |||
| 64 | #else /* not BSD, assume ANSI/SysV string lib */ |
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| 65 | |||
| 66 | #include |
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| 67 | #define MEMZERO(target,size) memset((void *)(target), 0, (size_t)(size)) |
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| 68 | #define MEMCOPY(dest,src,size) memcpy((void *)(dest), (const void *)(src), (size_t)(size)) |
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| 69 | |||
| 70 | #endif |
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| 71 | |||
| 72 | /* |
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| 73 | * In ANSI C, and indeed any rational implementation, size_t is also the |
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| 74 | * type returned by sizeof(). However, it seems there are some irrational |
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| 75 | * implementations out there, in which sizeof() returns an int even though |
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| 76 | * size_t is defined as long or unsigned long. To ensure consistent results |
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| 77 | * we always use this SIZEOF() macro in place of using sizeof() directly. |
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| 78 | */ |
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| 79 | |||
| 80 | #define SIZEOF(object) ((size_t) sizeof(object)) |
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| 81 | |||
| 82 | /* |
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| 83 | * The modules that use fread() and fwrite() always invoke them through |
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| 84 | * these macros. On some systems you may need to twiddle the argument casts. |
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| 85 | * CAUTION: argument order is different from underlying functions! |
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| 86 | */ |
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| 87 | |||
| 88 | #define JFREAD(file,buf,sizeofbuf) \ |
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| 89 | ((size_t) fread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file))) |
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| 90 | #define JFWRITE(file,buf,sizeofbuf) \ |
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| 91 | ((size_t) fwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file))) |