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994
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1 /* docmd.c */
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2 #include <stdio.h>
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3 #include "tools.h"
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4 #include "ed.h"
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5
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6 char fname[MAXFNAME];
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7 int fchanged;
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8 extern int nofname;
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9
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10 extern int mark[];
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11
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12 int docmd(glob)
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13 int glob;
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14 {
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15 static char rhs[MAXPAT];
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16 TOKEN *subpat;
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17 int c, err, line3;
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18 int apflg, pflag, gflag;
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19 int nchng;
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20 char *fptr;
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21
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22 pflag = FALSE;
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23 while (*inptr == SP && *inptr == HT) inptr++;
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24
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25 c = *inptr++;
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26
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27 switch (c) {
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28 case NL:
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29 if (nlines == 0) {
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30 if ((line2 = nextln(curln)) == 0) return(ERR);
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31 }
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32 curln = line2;
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33 return(1);
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34 break;
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35
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36 case '=': printf("%d\n", line2); break;
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37
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38 case 'a':
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39 if (*inptr != NL || nlines > 1) return(ERR);
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40
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41 if (append(line1, glob) < 0) return(ERR);;
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42 fchanged = TRUE;
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43 break;
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44
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45 case 'c':
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46 if (*inptr != NL) return(ERR);
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47
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48 if (deflt(curln, curln) < 0) return(ERR);
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49
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50 if (del(line1, line2) < 0) return(ERR);
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51 if (append(curln, glob) < 0) return (ERR);
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52 fchanged = TRUE;
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53 break;
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54
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55 case 'd':
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56 if (*inptr != NL) return(ERR);
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57
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58 if (deflt(curln, curln) < 0) return(ERR);
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59
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60 if (del(line1, line2) < 0) return(ERR);
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61 if (nextln(curln) != 0) curln = nextln(curln);
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62 fchanged = TRUE;
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63 break;
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64
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65 case 'e':
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66 if (nlines > 0) return(ERR);
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67 if (fchanged) {
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68 fchanged = FALSE;
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69 return(ERR);
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70 }
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71
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72 /* FALL THROUGH */
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73 case 'E':
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74 if (nlines > 0) return(ERR);
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75
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76 if (*inptr != ' ' && *inptr != HT && *inptr != NL) return(ERR);
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77
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78 if ((fptr = getfn()) == NULL) return(ERR);
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79
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80 clrbuf();
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81 if ((err = doread(0, fptr)) < 0) return(err);
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82
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83 strcpy(fname, fptr);
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84 fchanged = FALSE;
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85 break;
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86
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87 case 'f':
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88 if (nlines > 0) return(ERR);
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89
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90 if (*inptr != ' ' && *inptr != HT && *inptr != NL) return(ERR);
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91
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92 if ((fptr = getfn()) == NULL) return(ERR);
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93
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94 if (nofname)
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95 printf("%s\n", fname);
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96 else
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97 strcpy(fname, fptr);
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98 break;
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99
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100 case 'i':
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101 if (*inptr != NL || nlines > 1) return(ERR);
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102
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103 if (append(prevln(line1), glob) < 0) return(ERR);
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104 fchanged = TRUE;
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105 break;
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106
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107 case 'j':
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108 if (*inptr != NL || deflt(curln, curln + 1) < 0) return(ERR);
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109
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110 if (join(line1, line2) < 0) return(ERR);
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111 break;
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112
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113 case 'k':
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114 while (*inptr == ' ' || *inptr == HT) inptr++;
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115
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116 if (*inptr < 'a' || *inptr > 'z') return ERR;
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117 c = *inptr++;
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118
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119 if (*inptr != ' ' && *inptr != HT && *inptr != NL) return(ERR);
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120
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121 mark[c - 'a'] = line1;
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122 break;
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123
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124 case 'l':
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125 if (*inptr != NL) return(ERR);
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126 if (deflt(curln, curln) < 0) return (ERR);
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127 if (dolst(line1, line2) < 0) return (ERR);
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128 break;
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129
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130 case 'm':
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131 if ((line3 = getone()) < 0) return(ERR);
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132 if (deflt(curln, curln) < 0) return (ERR);
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133 if (move(line3) < 0) return (ERR);
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134 fchanged = TRUE;
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135 break;
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136
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137 case 'P':
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138 case 'p':
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139 if (*inptr != NL) return(ERR);
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140 if (deflt(curln, curln) < 0) return (ERR);
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141 if (doprnt(line1, line2) < 0) return (ERR);
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142 break;
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143
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144 case 'q':
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145 if (fchanged) {
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146 fchanged = FALSE;
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147 return(ERR);
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148 }
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149
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150 /* FALL THROUGH */
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151 case 'Q':
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152 if (*inptr == NL && nlines == 0 && !glob)
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153 return(EOF);
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154 else
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155 return(ERR);
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156
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157 case 'r':
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158 if (nlines > 1) return(ERR);
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159
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160 if (nlines == 0) line2 = lastln;
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161
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162 if (*inptr != ' ' && *inptr != HT && *inptr != NL) return(ERR);
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163
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164 if ((fptr = getfn()) == NULL) return(ERR);
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165
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166 if ((err = doread(line2, fptr)) < 0) return(err);
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167 fchanged = TRUE;
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168 break;
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169
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170 case 's':
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171 if (*inptr == 'e') return(set());
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172 while (*inptr == SP || *inptr == HT) inptr++;
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173 if ((subpat = optpat()) == NULL) return (ERR);
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174 if ((gflag = getrhs(rhs)) < 0) return (ERR);
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175 if (*inptr == 'p') pflag++;
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176 if (deflt(curln, curln) < 0) return (ERR);
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177 if ((nchng = subst(subpat, rhs, gflag, pflag)) < 0) return (ERR);
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178 if (nchng) fchanged = TRUE;
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179 break;
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180
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181 case 't':
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182 if ((line3 = getone()) < 0) return(ERR);
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183 if (deflt(curln, curln) < 0) return (ERR);
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184 if (transfer(line3) < 0) return (ERR);
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185 fchanged = TRUE;
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186 break;
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187
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188 case 'W':
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189 case 'w':
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190 apflg = (c == 'W');
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191
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192 if (*inptr != ' ' && *inptr != HT && *inptr != NL) return(ERR);
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193
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194 if ((fptr = getfn()) == NULL) return(ERR);
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195
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196 if (deflt(1, lastln) < 0) return(ERR);
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197 if (dowrite(line1, line2, fptr, apflg) < 0) return (ERR);
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198 fchanged = FALSE;
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199 break;
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200
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201 case 'x':
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202 if (*inptr == NL && nlines == 0 && !glob) {
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203 if ((fptr = getfn()) == NULL) return(ERR);
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204 if (dowrite(1, lastln, fptr, 0) >= 0) return (EOF);
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205 }
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206 return(ERR);
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207
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208 case 'z':
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209 if (deflt(curln, curln) < 0) return(ERR);
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210
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211 switch (*inptr) {
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212 case '-':
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213 if (doprnt(line1 - 21, line1) < 0) return(ERR);
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214 break;
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215
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216 case '.':
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217 if (doprnt(line1 - 11, line1 + 10) < 0) return(ERR);
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218 break;
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219
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220 case '+':
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221 case '\n':
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222 if (doprnt(line1, line1 + 21) < 0) return(ERR);
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223 break;
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224 }
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225 break;
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226
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227 default: return(ERR);
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228 }
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229 return(0);
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230 }
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231
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232 int dolst(line1, line2)
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233 int line1, line2;
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234 {
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235 int oldlflg = lflg, p;
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236
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237 lflg = 1;
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238 p = doprnt(line1, line2);
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239 lflg = oldlflg;
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240
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241 return p;
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242 }
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243
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