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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
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1 /*
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2 * cdjpeg.h
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3 *
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4 * Copyright (C) 1994-1997, 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 contains common declarations for the sample applications
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9 * cjpeg and djpeg. It is NOT used by the core JPEG library.
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10 */
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11
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12 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
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13 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
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14 #include "jinclude.h"
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15 #include "jpeglib.h"
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16 #include "jerror.h" /* get library error codes too */
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17 #include "cderror.h" /* get application-specific error codes */
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18
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19
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20 /*
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21 * Object interface for cjpeg's source file decoding modules
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22 */
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23
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24 typedef struct cjpeg_source_struct * cjpeg_source_ptr;
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25
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26 struct cjpeg_source_struct {
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27 JMETHOD(void, start_input, (j_compress_ptr cinfo,
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28 cjpeg_source_ptr sinfo));
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29 JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
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30 cjpeg_source_ptr sinfo));
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31 JMETHOD(void, finish_input, (j_compress_ptr cinfo,
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32 cjpeg_source_ptr sinfo));
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33
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34 FILE *input_file;
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35
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36 JSAMPARRAY buffer;
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37 JDIMENSION buffer_height;
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38 };
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39
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40
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41 /*
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42 * Object interface for djpeg's output file encoding modules
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43 */
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44
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45 typedef struct djpeg_dest_struct * djpeg_dest_ptr;
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46
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47 struct djpeg_dest_struct {
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48 /* start_output is called after jpeg_start_decompress finishes.
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49 * The color map will be ready at this time, if one is needed.
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50 */
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51 JMETHOD(void, start_output, (j_decompress_ptr cinfo,
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52 djpeg_dest_ptr dinfo));
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53 /* Emit the specified number of pixel rows from the buffer. */
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54 JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo,
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55 djpeg_dest_ptr dinfo,
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56 JDIMENSION rows_supplied));
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57 /* Finish up at the end of the image. */
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58 JMETHOD(void, finish_output, (j_decompress_ptr cinfo,
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59 djpeg_dest_ptr dinfo));
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60
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61 /* Target file spec; filled in by djpeg.c after object is created. */
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62 FILE * output_file;
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63
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64 /* Output pixel-row buffer. Created by module init or start_output.
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65 * Width is cinfo->output_width * cinfo->output_components;
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66 * height is buffer_height.
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67 */
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68 JSAMPARRAY buffer;
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69 JDIMENSION buffer_height;
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70 };
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71
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72
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73 /*
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74 * cjpeg/djpeg may need to perform extra passes to convert to or from
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75 * the source/destination file format. The JPEG library does not know
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76 * about these passes, but we'd like them to be counted by the progress
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77 * monitor. We use an expanded progress monitor object to hold the
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78 * additional pass count.
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79 */
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80
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81 struct cdjpeg_progress_mgr {
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82 struct jpeg_progress_mgr pub; /* fields known to JPEG library */
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83 int completed_extra_passes; /* extra passes completed */
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84 int total_extra_passes; /* total extra */
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85 /* last printed percentage stored here to avoid multiple printouts */
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86 int percent_done;
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87 };
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88
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89 typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
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90
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91
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92 /* Short forms of external names for systems with brain-damaged linkers. */
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93
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94 #ifdef NEED_SHORT_EXTERNAL_NAMES
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95 #define jinit_read_bmp jIRdBMP
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96 #define jinit_write_bmp jIWrBMP
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97 #define jinit_read_gif jIRdGIF
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98 #define jinit_write_gif jIWrGIF
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99 #define jinit_read_ppm jIRdPPM
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100 #define jinit_write_ppm jIWrPPM
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101 #define jinit_read_rle jIRdRLE
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102 #define jinit_write_rle jIWrRLE
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103 #define jinit_read_targa jIRdTarga
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104 #define jinit_write_targa jIWrTarga
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105 #define read_quant_tables RdQTables
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106 #define read_scan_script RdScnScript
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107 #define set_quant_slots SetQSlots
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108 #define set_sample_factors SetSFacts
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109 #define read_color_map RdCMap
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110 #define enable_signal_catcher EnSigCatcher
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111 #define start_progress_monitor StProgMon
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112 #define end_progress_monitor EnProgMon
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113 #define read_stdin RdStdin
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114 #define write_stdout WrStdout
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115 #endif /* NEED_SHORT_EXTERNAL_NAMES */
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116
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117 /* Module selection routines for I/O modules. */
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118
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119 EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));
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120 EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo,
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121 boolean is_os2));
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122 EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));
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123 EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo));
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124 EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));
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125 EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));
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126 EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));
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127 EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));
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128 EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));
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129 EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
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130
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131 /* cjpeg support routines (in rdswitch.c) */
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132
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133 EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename,
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134 int scale_factor, boolean force_baseline));
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135 EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));
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136 EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));
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137 EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
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138
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139 /* djpeg support routines (in rdcolmap.c) */
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140
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141 EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
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142
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143 /* common support routines (in cdjpeg.c) */
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144
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145 EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));
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146 EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo,
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147 cd_progress_ptr progress));
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148 EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));
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149 EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));
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150 EXTERN(FILE *) read_stdin JPP((void));
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151 EXTERN(FILE *) write_stdout JPP((void));
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152
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153 /* miscellaneous useful macros */
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154
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155 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
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156 #define READ_BINARY "r"
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157 #define WRITE_BINARY "w"
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158 #else
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159 #ifdef VMS /* VMS is very nonstandard */
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160 #define READ_BINARY "rb", "ctx=stm"
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161 #define WRITE_BINARY "wb", "ctx=stm"
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162 #else /* standard ANSI-compliant case */
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163 #define READ_BINARY "rb"
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164 #define WRITE_BINARY "wb"
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165 #endif
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166 #endif
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167
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168 #ifndef EXIT_FAILURE /* define exit() codes if not provided */
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169 #define EXIT_FAILURE 1
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170 #endif
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171 #ifndef EXIT_SUCCESS
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172 #ifdef VMS
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173 #define EXIT_SUCCESS 1 /* VMS is very nonstandard */
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174 #else
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175 #define EXIT_SUCCESS 0
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176 #endif
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177 #endif
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178 #ifndef EXIT_WARNING
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179 #ifdef VMS
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180 #define EXIT_WARNING 1 /* VMS is very nonstandard */
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181 #else
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182 #define EXIT_WARNING 2
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183 #endif
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184 #endif