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1 /* Merge parameters into a termcap entry string.
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2 Copyright (C) 1985, 1987, 1992, 1993, 1994 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 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: Not synched with FSF. */
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22
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23 /* config.h may rename various library functions such as malloc. */
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24 #ifdef emacs
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25
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26 #include <config.h>
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27
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28 #include <string.h>
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29
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30 #define realloc xrealloc
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31 #define malloc xmalloc
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32 #define free xfree
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33 extern void *xmalloc (int size);
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34 extern void *xrealloc (void *, int size);
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35
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36 #else /* emacs */
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37
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38 #ifdef STDC_HEADERS
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39 #include <stdlib.h>
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40 #include <string.h>
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41 #else
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42 extern char *malloc ();
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43 extern char *realloc ();
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44 #endif
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45
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46 #endif /* !emacs */
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47
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48 /* Assuming STRING is the value of a termcap string entry
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49 containing `%' constructs to expand parameters,
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50 merge in parameter values and store result in block OUTSTRING points to.
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51 LEN is the length of OUTSTRING. If more space is needed,
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52 a block is allocated with `malloc'.
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53
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54 The value returned is the address of the resulting string.
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55 This may be OUTSTRING or may be the address of a block got with `malloc'.
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56 In the latter case, the caller must free the block.
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57
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58 The fourth and following args to tparam serve as the parameter values. */
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59
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60 static char *tparam1 (CONST char *string, char *outstring, int len,
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61 CONST char *up, CONST char *left,
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62 int *argp);
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63
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64 /* XEmacs: renamed this function because just tparam() conflicts with
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65 ncurses */
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66 char *emacs_tparam (CONST char *string, char *outstring, int len, int arg0,
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67 int arg1, int arg2, int arg3);
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68 char *
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69 emacs_tparam (CONST char *string, char *outstring, int len, int arg0,
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70 int arg1, int arg2, int arg3)
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71 {
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72 int arg[4];
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73 arg[0] = arg0;
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74 arg[1] = arg1;
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75 arg[2] = arg2;
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76 arg[3] = arg3;
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77 return tparam1 (string, outstring, len, 0, 0, arg);
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78 }
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79
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80 CONST char *BC;
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81 CONST char *UP;
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82
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83 static char tgoto_buf[50];
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84
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85 char *tgoto (CONST char *cm, int hpos, int vpos);
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86 char *
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87 tgoto (CONST char *cm, int hpos, int vpos)
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88 {
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89 int args[2];
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90 if (!cm)
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91 return 0;
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92 args[0] = vpos;
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93 args[1] = hpos;
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94 return tparam1 (cm, tgoto_buf, 50, UP, BC, args);
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95 }
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96
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97 static char *
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98 tparam1 (CONST char *string, char *outstring, int len, CONST char *up,
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99 CONST char *left, int *argp)
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100 {
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101 int c;
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102 CONST char *p = string;
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103 char *op = outstring;
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104 char *outend;
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105 int outlen = 0;
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106
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107 int tem;
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108 int *old_argp = argp;
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109 int doleft = 0;
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110 int doup = 0;
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111
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112 outend = outstring + len;
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113
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114 while (1)
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115 {
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116 /* If the buffer might be too short, make it bigger. */
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117 if (op + 5 >= outend)
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118 {
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119 char *new;
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120 if (outlen == 0)
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121 {
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122 outlen = len + 40;
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123 new = (char *) malloc (outlen);
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124 outend += 40;
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125 memcpy (new, outstring, op - outstring);
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126 }
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127 else
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128 {
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129 outend += outlen;
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130 outlen *= 2;
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131 new = (char *) realloc (outstring, outlen);
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132 }
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133 op += new - outstring;
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134 outend += new - outstring;
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135 outstring = new;
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136 }
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137 c = *p++;
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138 if (!c)
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139 break;
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140 if (c == '%')
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141 {
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142 c = *p++;
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143 tem = *argp;
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144 switch (c)
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145 {
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146 case 'd': /* %d means output in decimal. */
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147 if (tem < 10)
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148 goto onedigit;
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149 if (tem < 100)
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150 goto twodigit;
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151 case '3': /* %3 means output in decimal, 3 digits. */
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152 if (tem > 999)
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153 {
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154 *op++ = tem / 1000 + '0';
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155 tem %= 1000;
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156 }
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157 *op++ = tem / 100 + '0';
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158 case '2': /* %2 means output in decimal, 2 digits. */
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159 twodigit:
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160 tem %= 100;
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161 *op++ = tem / 10 + '0';
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162 onedigit:
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163 *op++ = tem % 10 + '0';
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164 argp++;
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165 break;
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166
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167 case 'C':
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168 /* For c-100: print quotient of value by 96, if nonzero,
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169 then do like %+. */
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170 if (tem >= 96)
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171 {
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172 *op++ = tem / 96;
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173 tem %= 96;
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174 }
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175 case '+': /* %+x means add character code of char x. */
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176 tem += *p++;
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177 case '.': /* %. means output as character. */
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178 if (left)
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179 {
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180 /* If want to forbid output of 0 and \n and \t,
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181 and this is one of them, increment it. */
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182 while (tem == 0 || tem == '\n' || tem == '\t')
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183 {
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184 tem++;
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185 if (argp == old_argp)
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186 doup++, outend -= strlen (up);
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187 else
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188 doleft++, outend -= strlen (left);
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189 }
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190 }
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191 *op++ = tem | 0200;
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192 case 'f': /* %f means discard next arg. */
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193 argp++;
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194 break;
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195
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196 case 'b': /* %b means back up one arg (and re-use it). */
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197 argp--;
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198 break;
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199
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200 case 'r': /* %r means interchange following two args. */
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201 argp[0] = argp[1];
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202 argp[1] = tem;
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203 old_argp++;
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204 break;
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205
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206 case '>': /* %>xy means if arg is > char code of x, */
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207 if (argp[0] > *p++) /* then add char code of y to the arg, */
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208 argp[0] += *p; /* and in any case don't output. */
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209 p++; /* Leave the arg to be output later. */
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210 break;
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211
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212 case 'a': /* %a means arithmetic. */
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213 /* Next character says what operation.
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214 Add or subtract either a constant or some other arg. */
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215 /* First following character is + to add or - to subtract
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216 or = to assign. */
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217 /* Next following char is 'p' and an arg spec
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218 (0100 plus position of that arg relative to this one)
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219 or 'c' and a constant stored in a character. */
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220 tem = p[2] & 0177;
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221 if (p[1] == 'p')
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222 tem = argp[tem - 0100];
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223 if (p[0] == '-')
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224 argp[0] -= tem;
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225 else if (p[0] == '+')
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226 argp[0] += tem;
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227 else if (p[0] == '*')
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228 argp[0] *= tem;
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229 else if (p[0] == '/')
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230 argp[0] /= tem;
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231 else
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232 argp[0] = tem;
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233
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234 p += 3;
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235 break;
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236
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237 case 'i': /* %i means add one to arg, */
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238 argp[0] ++; /* and leave it to be output later. */
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239 argp[1] ++; /* Increment the following arg, too! */
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240 break;
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241
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242 case '%': /* %% means output %; no arg. */
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243 goto ordinary;
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244
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245 case 'n': /* %n means xor each of next two args with 140. */
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246 argp[0] ^= 0140;
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247 argp[1] ^= 0140;
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248 break;
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249
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250 case 'm': /* %m means xor each of next two args with 177. */
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251 argp[0] ^= 0177;
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252 argp[1] ^= 0177;
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253 break;
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254
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255 case 'B': /* %B means express arg as BCD char code. */
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256 argp[0] += 6 * (tem / 10);
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257 break;
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258
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259 case 'D': /* %D means weird Delta Data transformation. */
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260 argp[0] -= 2 * (tem % 16);
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261 break;
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262 }
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263 }
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264 else
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265 /* Ordinary character in the argument string. */
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266 ordinary:
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267 *op++ = c;
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268 }
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269 *op = 0;
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270 while (doup-- > 0)
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271 strcat (op, up);
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272 while (doleft-- > 0)
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273 strcat (op, left);
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274 return outstring;
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275 }
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276
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277 #ifdef DEBUG
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278
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279 main (argc, argv)
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280 int argc;
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281 char **argv;
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282 {
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283 char buf[50];
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284 int args[3];
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285 args[0] = atoi (argv[2]);
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286 args[1] = atoi (argv[3]);
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287 args[2] = atoi (argv[4]);
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288 tparam1 (argv[1], buf, "LEFT", "UP", args);
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289 printf ("%s\n", buf);
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290 return 0;
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291 }
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292
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293 #endif /* DEBUG */
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