1 | /*
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2 | * pass3.c - cawf(1) pass 3 function
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3 | */
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4 |
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5 | /*
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6 | * Copyright (c) 1991 Purdue University Research Foundation,
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7 | * West Lafayette, Indiana 47907. All rights reserved.
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8 | *
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9 | * Written by Victor A. Abell <abe@mace.cc.purdue.edu>, Purdue
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10 | * University Computing Center. Not derived from licensed software;
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11 | * derived from awf(1) by Henry Spencer of the University of Toronto.
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12 | *
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13 | * Permission is granted to anyone to use this software for any
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14 | * purpose on any computer system, and to alter it and redistribute
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15 | * it freely, subject to the following restrictions:
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16 | *
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17 | * 1. The author is not responsible for any consequences of use of
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18 | * this software, even if they arise from flaws in it.
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19 | *
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20 | * 2. The origin of this software must not be misrepresented, either
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21 | * by explicit claim or by omission. Credits must appear in the
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22 | * documentation.
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23 | *
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24 | * 3. Altered versions must be plainly marked as such, and must not
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25 | * be misrepresented as being the original software. Credits must
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26 | * appear in the documentation.
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27 | *
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28 | * 4. This notice may not be removed or altered.
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29 | */
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30 |
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31 | #include "cawf.h"
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32 |
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33 | void
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34 | Pass3(len, word, sarg, narg)
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35 | int len; /* length (negative is special) */
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36 | unsigned char *word; /* word */
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37 | unsigned char *sarg; /* string argument */
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38 | int narg; /* numeric argument */
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39 | {
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40 | int addto; /* spaces to add to all words */
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41 | int i, j, k; /* temporary index */
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42 | unsigned char msg[MAXLINE]; /* message buffer */
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43 | int n; /* temporary number */
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44 | unsigned char *s1; /* temporary string pointer */
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45 | int sp = 0; /* no-break spacing switch */
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46 | int sp_Outll; /* sp-saved Outll */
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47 | char sp_Outln; /* sp-saved Outln[0] */
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48 | int sp_Outlx; /* sp-saved Outlx */
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49 | int sp_Padx; /* sp-saved Padx */
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50 | int sp_Tind; /* sp-saved Tind */
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51 | int wl; /* real word length */
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52 | int xsp; /* extra spaces to add */
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53 | int vsp; /* vertical spacing status */
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54 |
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55 | vsp = 0;
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56 | if (word != NULL)
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57 | wl = strlen((char *)word);
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58 | /*
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59 | * If not a special command, process a word.
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60 | */
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61 | if (len >= 0 && Outll < 0) {
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62 | /*
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63 | * Enter first word.
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64 | */
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65 | (void) strcpy((char *)Outln, (char *)word);
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66 | Outll = len;
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67 | Outlx = wl;
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68 | Padx = 0;
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69 | } else if (len >= 0
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70 | && (Outll+Contlen+len+narg) <= (LL-Pgoff-Ind-Tind)) {
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71 | /*
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72 | * The word fits, so enter it.
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73 | */
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74 | if ((Contlen + len) > 0) {
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75 | line_too_big:
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76 | if ((Outlx + Contlen + wl) >= MAXOLL) {
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77 | Error3(len, (char *)word, (char *)sarg, narg,
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78 | "output line too big");
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79 | return;
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80 | } else {
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81 | if (Contlen > 0 && Cont != NULL) {
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82 | if (Contlen == 1 && *Cont == ' ') {
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83 | Padchar[Padx++] = Outlx;
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84 | Outln[Outlx++] = ' ';
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85 | } else {
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86 | (void) strcpy((char *)&Outln[Outlx],
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87 | (char *)Cont);
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88 | Outlx += Contlen;
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89 | }
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90 | }
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91 | if (len > 0) {
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92 | (void) strcpy((char *)&Outln[Outlx],
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93 | (char *)word);
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94 | Outlx += wl;
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95 | }
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96 | }
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97 | }
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98 | Outll += Contlen + len;
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99 | } else if (len == NOBREAK || len == MESSAGE) {
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100 | /*
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101 | * Do nothing (equivalent to break)
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102 | */
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103 | } else if (len == DOBREAK && strcmp((char *)word, "need") == 0
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104 | && (Nxtln + narg) < (Pglen + 1 - Botmarg)) {
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105 | /*
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106 | * Do nothing, because there is room on the page.
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107 | */
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108 | } else if (len == DOBREAK && strcmp((char *)word, "toindent") == 0
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109 | && (Ind + Tind + Outll) < Ind) {
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110 | /*
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111 | * Move to indent position with line - there is room.
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112 | */
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113 | n = Ind - (Ind + Tind +Outll);
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114 | Outll += n;
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115 | if ((Outlx + n) >= MAXOLL)
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116 | goto line_too_big;
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117 | for (i = n; i; i--)
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118 | Outln[Outlx++] = ' ';
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119 | Padx = 0;
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120 | Free(&Cont);
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121 | Contlen = 0;
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122 | } else if (Outll >= 0
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123 | || (len == DOBREAK && strcmp((char *)word, "need") == 0)) {
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124 | /*
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125 | * A non-empty line or a "need" forces output.
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126 | */
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127 | vsp = 0;
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128 |
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129 | print_line:
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130 | if (Nxtln == 1) {
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131 | /*
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132 | * We're at the top of the page, so issue the header.
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133 | */
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134 | if (Thispg > 1)
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135 | Charput((int)'\f');
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136 | for (i = (Topmarg - 1)/2; i > 0; i--) {
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137 | Charput((int)'\n');
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138 | Nxtln++;
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139 | }
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140 | /*
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141 | * Print the page header, as required.
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142 | */
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143 | if (Fph || Thispg > 1) {
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144 | i = LenprtHF(Hdc, Thispg, 0)
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145 | + LenprtHF(Hdl, Thispg, 0)
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146 | + LenprtHF(Hdr, Thispg, 0) + 2;
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147 | j = (LL - i - Pgoff) / 2 + 1;
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148 | n = LL - Pgoff - i - j + 2;
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149 | for (k = 0; k < Pgoff; k++)
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150 | Charput((int)' ');
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151 | if (Hdl)
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152 | LenprtHF(Hdl, Thispg, 1);
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153 | while (j-- > 0)
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154 | Charput((int)' ');
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155 | if (Hdc)
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156 | LenprtHF(Hdc, Thispg, 1);
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157 | while (n-- > 0)
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158 | Charput((int)' ');
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159 | if (Hdr)
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160 | LenprtHF(Hdr, Thispg, 1);
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161 | Charput((int)'\n');
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162 | } else
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163 | Charput((int)'\n');
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164 | Nxtln++;
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165 | while(Nxtln <= Topmarg) {
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166 | Charput((int)'\n');
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167 | Nxtln++;
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168 | }
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169 | }
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170 | /*
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171 | * Add a trailing hyphen, if mecessary.
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172 | */
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173 | if (vsp == 0 && Eollen > 0 && Eol != NULL) {
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174 | i = strlen((char *)Eol);
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175 | if ((Outlx + i) >= MAXOLL)
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176 | goto line_too_big;
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177 | (void) strcpy((char *)&Outln[Outlx], (char *)Eol);
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178 | Outlx += i;
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179 | Outll += Eollen;
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180 | }
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181 | /*
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182 | * Trim trailing spaces from the output line.
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183 | */
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184 | while (Outlx > 0) {
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185 | if (Outln[Outlx - 1] != ' ')
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186 | break;
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187 | if (Padx > 0 && (Outlx - 1) == Padchar[Padx - 1])
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188 | Padx--;
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189 | Outlx--;
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190 | Outln[Outlx] = '\0';
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191 | Outll--;
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192 | }
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193 | if (Outlx == 0)
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194 | Charput((int)'\n');
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195 | else if (len == DOBREAK && strcmp((char *)word, "center") == 0)
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196 | {
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197 | /*
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198 | * Center the output line.
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199 | */
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200 | i = (LL - Pgoff - Outll) / 2;
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201 | if (i < 0)
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202 | i = 0;
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203 | for (j = (Pgoff + Ind + Tind + i); j; j--)
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204 | Charput((int)' ');
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205 | Stringput(Outln);
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206 | Charput((int)'\n');
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207 | } else if (Adj == LEFTADJ
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208 | || (Adj == BOTHADJ && (len < 0 || Padx == 0))) {
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209 | /*
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210 | * No right margin adjustment - disabled, inappropriate
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211 | * (line ended by break) or impossible.
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212 | */
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213 | for (i = 0; i < (Pgoff + Ind + Tind); i++)
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214 | Charput((int)' ');
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215 | Stringput(Outln);
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216 | Charput((int)'\n');
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217 | } else if (Adj == BOTHADJ) {
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218 | /*
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219 | * Adjust right margin.
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220 | */
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221 | for (i = 0; i < (Pgoff + Ind + Tind); i++)
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222 | Charput((int)' ');
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223 | i = LL - (Pgoff + Ind + Tind);
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224 | j = i - Outll;
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225 | addto = Padx ? (j / Padx) : 0;
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226 | xsp = j - (Padx * addto);
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227 | for (i = 0, s1 = Outln; i < Padx; i++) {
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228 | while (*s1 && (s1 - Outln) <= Padchar[i])
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229 | Charput((int)*s1++);
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230 | if (*s1 == '\0')
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231 | break;
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232 | j = addto;
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233 | if (Padfrom == PADLEFT) {
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234 | if (i < xsp)
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235 | j++;
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236 | } else if (i >= (Padx - xsp))
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237 | j++;
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238 | while (j-- > 0)
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239 | Charput((int)' ');
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240 | }
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241 | while (*s1)
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242 | Charput((int)*s1++);
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243 | Charput((int)'\n');
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244 | Padfrom = (Padfrom == PADLEFT) ? PADRIGHT : PADLEFT;
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245 | }
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246 | /*
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247 | * End of line housekeeping
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248 | */
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249 | Nxtln++;
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250 | Outll = -1;
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251 | Outlx = 0;
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252 | Padx = 0;
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253 | Tind = 0;
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254 | Nospmode = 0;
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255 | if (vsp == 0 && len == DOBREAK
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256 | && strcmp((char *)word, "need") == 0) {
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257 | /*
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258 | * Break caused by "need" - satisfy it.
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259 | */
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260 | while (Nxtln < (Pglen + 1 - Botmarg)) {
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261 | Charput((int)'\n');
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262 | Nxtln++;
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263 | }
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264 | }
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265 | if (Nxtln >= (Pglen + 1 - Botmarg)) {
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266 | /*
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267 | * Footer required
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268 | */
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269 | for (i = (Botmarg - 1)/2; i > 0; i--) {
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270 | Charput((int)'\n');
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271 | Nxtln++;
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272 | }
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273 | i = LenprtHF(Ftl, Thispg, 0) + LenprtHF(Ftc, Thispg, 0)
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274 | + LenprtHF(Ftr, Thispg, 0) + 2;
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275 | j = (LL - i - Pgoff) / 2 + 1;
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276 | n = LL - Pgoff - i - j + 2;
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277 | for (k = 0; k < Pgoff; k++)
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278 | Charput((int)' ');
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279 | if (Ftl)
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280 | LenprtHF(Ftl, Thispg, 1);
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281 | while (j-- > 0)
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282 | Charput((int)' ');
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283 | if (Ftc)
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284 | LenprtHF(Ftc, Thispg, 1);
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285 | while (n-- > 0)
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286 | Charput((int)' ');
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287 | if (Ftr)
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288 | LenprtHF(Ftr, Thispg, 1);
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289 | Charput((int)'\n');
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290 | Nxtln++;
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291 | /*
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292 | * The last blank line on the page is suppressed to assist
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293 | * printers that can't look ahead to the following FF.
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294 | */
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295 | while (Nxtln < Pglen) {
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296 | Charput((int)'\n');
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297 | Nxtln++;
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298 | }
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299 | Nxtln = 1;
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300 | Thispg++;
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301 | Nospmode = 1;
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302 | Padfrom = PADRIGHT;
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303 | }
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304 | /*
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305 | * Initiate any extra vertical spacing.
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306 | */
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307 | if (++vsp < Vspace)
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308 | goto print_line;
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309 | /*
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310 | * Save any input word that might have forced output.
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311 | */
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312 | if (len >= 0) {
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313 | (void) strcpy((char *)Outln, (char *)word);
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314 | Outll = len;
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315 | Outlx = wl;
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316 | Padx = 0;
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317 | }
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318 | }
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319 | /*
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320 | * A break causes padding reversal.
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321 | */
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322 | if (len == DOBREAK)
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323 | Padfrom = PADRIGHT;
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324 | if (len >= 0 || strcmp((char *)word, "nohyphen") == 0) {
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325 | /*
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326 | * Reset continuation and hyphenation.
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327 | */
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328 | if (Contlen != 1 || Cont[0] != ' ') {
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329 | Free(&Cont);
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330 | Cont = Newstr((unsigned char *)" ");
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331 | Contlen = 1;
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332 | }
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333 | if (Eollen > 0) {
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334 | Free(&Eol);
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335 | Eollen = 0;
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336 | }
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337 | return;
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338 | }
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339 | /*
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340 | * Now post-process any special commands.
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341 | */
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342 | if (len == MESSAGE) {
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343 | Error3(len, (char *)word, (char *)sarg, narg, NULL);
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344 | return;
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345 | }
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346 |
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347 | switch (*word) {
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348 |
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349 | case 'b': /* both */
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350 | /*
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351 | * Adjust on both margins.
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352 | */
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353 | Adj = BOTHADJ;
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354 | return;
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355 |
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356 | case 'c': /* center */
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357 | return;
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358 |
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359 | case 'e': /* errsto */
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360 | /*
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361 | * "errsto" comes from awf.
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362 | */
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363 | return;
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364 |
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365 | case 'f': /* flush and fph */
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366 | if (word[1] == 'l')
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367 | return;
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368 | else if (word[1] == 'p') {
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369 | /*
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370 | * First page header status
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371 | */
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372 | Fph = narg;
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373 | return;
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374 | }
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375 | break;
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376 |
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377 | case 'g': /* gap */
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378 | /*
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379 | * Increase word gap. (Space is not paddable.)
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380 | */
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381 | if (Outll >= 0) {
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382 | if ((Outlx + narg - 1) >= MAXOLL)
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383 | goto line_too_big;
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384 | for (i = 0; i < (narg - 1); i++) {
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385 | Outln[Outlx++] = ' ';
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386 | Outll++;
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387 | }
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388 | }
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389 | return;
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390 |
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391 | case 'h': /* hyphen */
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392 | /*
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393 | * Set discretionary hyphen.
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394 | */
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395 | Free(&Cont);
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396 | Contlen = 0;
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397 | Free(&Eol);
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398 | Eol = (sarg != NULL) ? Newstr(sarg) : NULL;
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399 | Eollen = narg;
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400 | return;
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401 |
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402 | case 'i': /* indent */
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403 | /*
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404 | * Set indentation.
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405 | */
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406 | Ind = narg;
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407 | return;
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408 |
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409 | case 'l': /* left or linelen */
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410 | if (word[1] == 'e') {
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411 | /*
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412 | * Adjust on left margin.
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413 | */
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414 | Adj = LEFTADJ;
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415 | return;
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416 | } else if (word[1] == 'i') {
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417 | /*
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418 | * Set line length.
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419 | */
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420 | LL = narg;
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421 | return;
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422 | }
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423 | break;
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424 |
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425 | case 'n': /* need or nospace */
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426 | if (word[1] == 'e')
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427 | return; /* need */
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428 | else if (word[1] == 'o') {
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429 | /*
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430 | * Set no space mode.
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431 | */
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432 | Nospmode = 1;
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433 | return;
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434 | }
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435 | break;
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436 |
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437 | case 'p': /* pagelen or pageoffset */
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438 | if (strncmp((char *)&word[1], "age", 3) != 0)
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439 | break;
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440 | if (word[4] == 'l') {
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441 | /*
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442 | * Set page length.
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443 | */
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444 | Pglen = narg;
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445 | return;
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446 | } else if (word[4] == 'o') {
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447 | /*
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448 | * Set page offset.
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449 | */
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450 | Pgoff = narg;
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451 | return;
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452 | }
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453 | break;
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454 |
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455 | case 's': /* space */
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456 | if (sp) {
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457 |
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458 | /*
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459 | * Restore values after NOBREAK spacing ("^'sp").
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460 | */
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461 | Outlx = sp_Outlx;
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462 | Outln[0] = sp_Outln;
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463 | Padx = sp_Padx;
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464 | Outll = sp_Outll;
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465 | Tind = sp_Tind;
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466 | return;
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467 | }
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468 | if (Nospmode == 0) {
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469 | if (len == NOBREAK) {
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470 |
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471 | /*
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472 | * Set up for NOBREAK spacing.
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473 | */
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474 | sp_Outlx = Outlx;
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475 | sp_Outln = Outln[0];
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476 | sp_Padx = Padx;
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477 | sp_Outll = Outll;
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478 | sp_Tind = Tind;
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479 | vsp = Vspace + 1;
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480 | sp = 1;
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481 | }
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482 | /*
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483 | * Generate a blank line.
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484 | */
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485 | Outlx = 0;
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486 | Outln[0] = '\0';
|
---|
487 | Padx = 0;
|
---|
488 | Outll = LL - 1;
|
---|
489 | if (sp)
|
---|
490 | goto print_line;
|
---|
491 | }
|
---|
492 | return;
|
---|
493 |
|
---|
494 | case 't': /* tabto, tempindent, or
|
---|
495 | * toindent */
|
---|
496 | if (word[1] == 'a') {
|
---|
497 | /*
|
---|
498 | * Move to TAB stop.
|
---|
499 | */
|
---|
500 | if (Outll < 0)
|
---|
501 | Outll = 0;
|
---|
502 | if ((n = narg - Outll) > 0) {
|
---|
503 | if ((Outlx + n) >= MAXOLL)
|
---|
504 | goto line_too_big;
|
---|
505 | Outll += n;
|
---|
506 | for (i = n; i > 0; i--)
|
---|
507 | Outln[Outlx++] = ' ';
|
---|
508 | Free(&Cont);
|
---|
509 | Contlen = 0;
|
---|
510 | Padx = 0;
|
---|
511 | }
|
---|
512 | return;
|
---|
513 | } else if (word[1] == 'e') {
|
---|
514 | /*
|
---|
515 | * Set temporary indentation.
|
---|
516 | */
|
---|
517 | if (*sarg == '\0' && narg >= 0)
|
---|
518 | Tind = narg - Ind;
|
---|
519 | else
|
---|
520 | Tind = ((Ind + narg) >= 0) ? narg : -Ind;
|
---|
521 | return;
|
---|
522 | } else if (word[1] == 'o')
|
---|
523 | return; /* toindent */
|
---|
524 | break;
|
---|
525 |
|
---|
526 | case 'u': /* userhyphen */
|
---|
527 | /*
|
---|
528 | * Set line length.
|
---|
529 | */
|
---|
530 | Free(&Cont);
|
---|
531 | Free(&Eol);
|
---|
532 | Contlen = Eollen = narg;
|
---|
533 | Cont = (sarg == NULL) ? NULL : Newstr(sarg);
|
---|
534 | Eol = (sarg == NULL) ? NULL : Newstr(sarg);
|
---|
535 | return;
|
---|
536 |
|
---|
537 | case 'v': /* vspace */
|
---|
538 | /*
|
---|
539 | * Set vertical spacing.
|
---|
540 | */
|
---|
541 | Vspace = (narg == 0) ? 1 : narg;
|
---|
542 | return;
|
---|
543 |
|
---|
544 | case 'y': /* yesspace */
|
---|
545 | /*
|
---|
546 | * Set space mode.
|
---|
547 | */
|
---|
548 | Nospmode = 0;
|
---|
549 | return;
|
---|
550 | } /* end of switch(*word) */
|
---|
551 | /*
|
---|
552 | * Locate header and footer defintions.
|
---|
553 | */
|
---|
554 | if (regexec(Pat[14].pat, word)) {
|
---|
555 | if (strcmp((char *)word, "LH") == 0) {
|
---|
556 | /*
|
---|
557 | * Left header
|
---|
558 | */
|
---|
559 | Free(&Hdl);
|
---|
560 | if (sarg != NULL)
|
---|
561 | Hdl = Newstr(sarg);
|
---|
562 | return;
|
---|
563 | }
|
---|
564 | if (strcmp((char *)word, "CH") == 0) {
|
---|
565 | /*
|
---|
566 | * Center header
|
---|
567 | */
|
---|
568 | Free(&Hdc);
|
---|
569 | if (sarg != NULL)
|
---|
570 | Hdc = Newstr(sarg);
|
---|
571 | return;
|
---|
572 | }
|
---|
573 | if (strcmp((char *)word, "RH") == 0) {
|
---|
574 | /*
|
---|
575 | * Right header
|
---|
576 | */
|
---|
577 | Free(&Hdr);
|
---|
578 | if (sarg != NULL)
|
---|
579 | Hdr = Newstr(sarg);
|
---|
580 | return;
|
---|
581 | }
|
---|
582 | if (strcmp((char *)word, "LF") == 0) {
|
---|
583 | /*
|
---|
584 | * Left footer
|
---|
585 | */
|
---|
586 | Free(&Ftl);
|
---|
587 | if (sarg != NULL)
|
---|
588 | Ftl = Newstr(sarg);
|
---|
589 | return;
|
---|
590 | }
|
---|
591 | if (strcmp((char *)word, "CF") == 0) {
|
---|
592 | /*
|
---|
593 | * Center footer
|
---|
594 | */
|
---|
595 | Free(&Ftc);
|
---|
596 | if (sarg != NULL)
|
---|
597 | Ftc = Newstr(sarg);
|
---|
598 | return;
|
---|
599 | }
|
---|
600 | if (strcmp((char *)word, "RF") == 0) {
|
---|
601 | /*
|
---|
602 | * Right footer
|
---|
603 | */
|
---|
604 | Free(&Ftr);
|
---|
605 | if (sarg != NULL)
|
---|
606 | Ftr = Newstr(sarg);
|
---|
607 | return;
|
---|
608 | }
|
---|
609 | }
|
---|
610 | /*
|
---|
611 | * Error on unknown arguments
|
---|
612 | */
|
---|
613 | Error3(len, (char *)word, (char *)sarg, narg, "unknown request");
|
---|
614 | }
|
---|