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1 /* system description header for VMS
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2 Copyright (C) 1986 Free Software Foundation, Inc.
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3
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4 This file is part of GNU Emacs.
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5
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6 GNU Emacs is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 GNU Emacs is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: FSF 19.31. */
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22
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23 /*
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24 * Define symbols to identify the version of Unix this is.
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25 * Define all the symbols that apply correctly.
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26 */
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27
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28 #ifndef VMS /* Decus cpp doesn't define this but VAX C does */
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29 #define VMS
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30 #endif /* VMS */
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31 /* Note that this file is used indirectly via vms4-0.h, or some other
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32 such file. These other files define a symbol VMS4_0, VMS4_2, etc. */
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33
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34 /* SYSTEM_TYPE should indicate the kind of system you are using.
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35 It sets the Lisp variable system-type. */
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36
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37 #define SYSTEM_TYPE "vax-vms"
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38
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39 /* Letter to use in finding device name of first pty,
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40 if system supports pty's. 'a' means it is /dev/ptya0 */
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41
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42 #define FIRST_PTY_LETTER 'a'
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43
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44 /*
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45 * Define HAVE_PTYS if the system supports pty devices.
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46 */
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47
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48 /* #define HAVE_PTYS */
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49
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50 /*
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51 * Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
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52 * The 4.2 opendir, etc., library functions.
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53 * (This is autoconfed, but configure probably doesn't
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54 * work on this system.)
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55 */
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56
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57 #define NONSYSTEM_DIR_LIBRARY
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58
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59 /* If your system uses COFF (Common Object File Format) then define the
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60 preprocessor symbol "COFF". */
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61
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62 /* #define COFF */
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63
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64 /* define MAIL_USE_FLOCK if the mailer uses flock
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65 to interlock access to /usr/spool/mail/$USER.
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66 The alternative is that a lock file named
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67 /usr/spool/mail/$USER.lock. */
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68
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69 /* #define MAIL_USE_FLOCK */
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70
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71 /* Define the maximum record length for print strings, if needed. */
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72
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73 #define MAX_PRINT_CHARS 300
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74
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75
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76 /* Here, on a separate page, add any special hacks needed
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77 to make Emacs work on this system. For example,
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78 you might define certain system call names that don't
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79 exist on your system, or that do different things on
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80 your system and must be used only through an encapsulation
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81 (Which you should place, by convention, in sysdep.c). */
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82
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83 /* Do you have the sharable library bug? If you link with a sharable
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84 library that contains psects with the NOSHR attribute and also refer to
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85 those psects in your program, the linker give you a private version of
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86 the psect which is not related to the version used by the sharable
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87 library. The end result is that your references to variables in that
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88 psect have absolutely nothing to do with library references to what is
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89 supposed to be the same variable. If you intend to link with the standard
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90 C library (NOT the sharable one) you don't need to define this. (This
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91 is NOT fixed in V4.4...) */
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92
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93 #define SHARABLE_LIB_BUG
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94
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95 /* Partially due to the above mentioned bug and also so that we don't need
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96 to require that people have a sharable C library, the default for Emacs
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97 is to link with the non-shared library. If you want to link with the
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98 shared library, define this and remake xmakefile and fileio.c. This allows
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99 us to ship a guaranteed executable image. */
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100
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101 #define LINK_CRTL_SHARE
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102
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103 /* Define this if you want to read the file SYS$SYSTEM:SYSUAF.DAT for user
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104 information. If you do use this, you must either make SYSUAF.DAT world
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105 readable or install Emacs with SYSPRV. */
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106
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107 /* #define READ_SYSUAF */
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108
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109 /* On VMS these have a different name */
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110
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111 #define unlink delete
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112
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113 #ifndef _GNUC_
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114 extern double mth$dmod(double, double);
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115 #define drem mth$dmod
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116 #endif
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117
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118 /* Some time routines are missing in the VAX C RTL, or needs some
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119 extra bit of code */
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120 #define tzset sys_tzset
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121 #define localtime sys_localtime
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122 #define gmtime sys_gmtime
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123
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124 /* On later versions of VMS these exist in the C run time library, but
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125 we are using our own implementations. Hide their names to avoid
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126 linker errors */
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127 #define rename sys_rename
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128 #define execvp sys_execvp
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129 #define system sys_system
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130
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131 #ifndef GNU_MALLOC
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132 /* Hide these names so that we don't get linker errors */
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133 #define malloc sys_malloc
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134 #define free sys_free
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135 #define realloc sys_realloc
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136 #define calloc sys_calloc
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137
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138 /* Don't use the standard brk and sbrk */
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139 #define sbrk sys_sbrk
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140 #define brk sys_brk
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141 #endif
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142
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143 /* On VMS we want to avoid reading and writing very large amounts of
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144 data at once, so we redefine read and write here. */
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145
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146 #define ENCAPSULATE_READ
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147 #define ENCAPSULATE_WRITE
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148
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149 /* sys_creat just calls the real creat with additional args of
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150 "rfm=var", "rat=cr" to get "normal" VMS files... */
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151 #define ENCAPSULATE_CREAT
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152
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153 /* fwrite forces an RMS PUT on every call. This is abysmally slow, so
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154 we emulate fwrite with fputc, which forces buffering and is much
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155 faster! */
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156 #define ENCAPSULATE_FWRITE
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157
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158 /* getuid only returns the member number, which is not unique on most VMS
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159 systems. We emulate it with (getgid()<<16 | getuid()). */
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160 #define getuid sys_getuid
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161
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162 /* If user asks for TERM, check first for EMACS_TERM. */
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163 #define getenv sys_getenv
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164
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165 /* Standard C abort is less useful than it should be. */
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166 #define abort sys_abort
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167
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168 /* Case conflicts with C library fread. */
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169 #define Fread F_read
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170
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171 /* Case conflicts with C library srandom. */
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172 #define Srandom S_random
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173
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174 /* variable length too long... maybe */
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175 #if 0
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176 #define do_line_insertion_deletion_costs do_line_insertion_deletion_cost
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177 #endif
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178
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179 /* Cause initialization of vmsfns.c to be run. */
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180 #define SYMS_SYSTEM syms_of_vmsfns ()
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181
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182 /* VAXCRTL access doesn't deal with SYSPRV very well (among other oddities...)
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183 Here, we use $CHKPRO to really determine access. */
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184 #define ENCAPSULATE_ACCESS
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185
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186 #define PAGESIZE 512
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187
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188 #define _longjmp longjmp
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189 #define _setjmp setjmp
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190
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191 globalref char sdata[];
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192 #define DATA_START (((int) sdata + 511) & ~511)
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193 #define TEXT_START 512
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194
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195 /* Baud-rate values from tty status are not standard. */
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196
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197 #define BAUD_CONVERT \
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198 { 0, 50, 75, 110, 134, 150, 300, 600, 1200, 1800, \
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199 2000, 2400, 3600, 4800, 7200, 9600, 19200 }
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200
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201 #define SYSTEM_PURESIZE_EXTRA 50000
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202
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203 /* Stdio FILE type has extra indirect on VMS, so must alter this macro. */
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204
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205 #define PENDING_OUTPUT_COUNT(FILE) ((*(FILE))->_ptr - (*(FILE))->_base)
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206
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207 #define NULL_DEVICE "NLA0:"
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208
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209 #define TERMCAP_NAME "emacs_library:[etc]termcap.dat"
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210
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211 #define EXEC_SUFFIXES ".exe:.com"
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212
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213 /* Case conflict with Xlib XFree () */
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214 #define xfree emacs_xfree
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215
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216 /* What separator do we use in paths? */
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217 #define SEPCHAR ','
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