1 | /*
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2 | * a small awk clone
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3 | *
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4 | * (C) 1989 Saeko Hirabauashi & Kouichi Hirabayashi
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5 | *
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6 | * Absolutely no warranty. Use this software with your own risk.
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7 | *
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8 | * Permission to use, copy, modify and distribute this software for any
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9 | * purpose and without fee is hereby granted, provided that the above
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10 | * copyright and disclaimer notice.
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11 | *
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12 | * This program was written to fit into 64K+64K memory of the Minix 1.2.
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13 | */
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14 |
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15 |
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16 | #include <stdio.h>
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17 | #include <ctype.h>
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18 | #include <sys/types.h>
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19 | #include <sys/stat.h>
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20 | #include <fcntl.h>
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21 | #ifdef DOS
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22 | #include <process.h>
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23 | #endif
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24 | #include "awk.h"
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25 | #include "regexp.h"
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26 |
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27 | #define MAXFLD 100
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28 |
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29 | extern char **FS, **RS, **OFS, **ORS, **FILENAME;
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30 | extern double *NF, *NR;
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31 | extern double *FNR;
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32 | extern double *ARGC;
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33 | extern SYMBOL *argtab[];
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34 | extern CELL *getvar();
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35 |
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36 | char *strsave(), *strcpy(), *getsval(), *jStrchr(), *strchr();
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37 | double getfval(), atof();
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38 | CELL *mkcell(), *mktmp(), *execute(), *patexec();
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39 | FILE *efopen();
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40 |
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41 | extern CELL truecell, falsecell;
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42 |
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43 | extern int pateval;
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44 |
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45 | int infileno = 1;
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46 | FILE *ifp;
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47 | char record[BUFSIZ];
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48 | CELL *field[MAXFLD];
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49 |
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50 | char *fs_str;
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51 | regexp *fs_pat;
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52 |
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53 | CELL *
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54 | Getline(p) NODE *p;
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55 | {
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56 | CELL *u;
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57 | char *fnam, *s, str[BUFSIZ];
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58 | int i;
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59 | FILE *fp, *getfp();
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60 |
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61 | if ((int) p->n_arg[0]) /* read into var */
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62 | s = str;
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63 | else
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64 | s = NULL;
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65 | if ((int) p->n_arg[1]) { /* file name */
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66 | u = execute(p->n_arg[1]);
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67 | fnam = getsval(u);
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68 | fp = getfp(fnam, (int) p->n_arg[2]);
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69 | c_free(u);
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70 | i = get1rec(s, fp);
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71 | }
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72 | else
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73 | i = Getrec(s);
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74 | if (s == str) {
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75 | u = execute(p->n_arg[0]);
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76 | setsval(u, str);
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77 | }
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78 | return mktmp(NUM, NULL, (double) i);
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79 | }
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80 |
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81 | static
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82 | get1rec(buf, fp) char *buf; FILE *fp;
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83 | {
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84 | register int c;
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85 | register char rs, *s;
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86 | int mflg;
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87 |
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88 | if (buf == NULL)
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89 | buf = record;
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90 | if ((rs = **RS) == '\0') { /* multi line record */
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91 | mflg = 1;
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92 | rs = '\n';
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93 | }
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94 | else
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95 | mflg = 0;
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96 |
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97 | if (feof(fp) || (c = getc(fp)) == EOF)
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98 | return 0;
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99 | for (s = buf; ; ) {
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100 | for ( ; c != rs && c != EOF; c = getc(fp)) {
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101 | if (isKanji(c)) {
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102 | *s++ = c; c = getc(fp);
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103 | }
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104 | *s++ = c;
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105 | }
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106 | if (mflg) {
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107 | if ((c = getc(fp)) == '\n' || c == EOF)
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108 | break;
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109 | *s++ = '\n';
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110 | }
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111 | else
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112 | break;
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113 | }
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114 | *s = '\0';
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115 | #if 1
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116 | if (buf == record) {
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117 | #else
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118 | if (buf == record && c != EOF) {
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119 | #endif
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120 | mkfld(record, *FS, field);
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121 | (*NR)++;
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122 | (*FNR)++;
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123 | }
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124 | return s > buf || c != EOF ? 1 : 0;
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125 | }
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126 |
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127 | Getrec(s) char *s;
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128 | {
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129 | CELL *u;
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130 | char *file, str[8];
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131 |
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132 | while (ifp == stdin || infileno < (int)*ARGC) {
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133 | if (ifp == NULL) {
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134 | *FNR = 0.0;
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135 | if (infileno == (int)*ARGC)
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136 | break;
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137 | sprintf(str, "%d", infileno);
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138 | u = getvar(str, argtab);
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139 | file = getsval(u);
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140 | if (strchr(file, '=') != NULL) {
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141 | setvar(file);
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142 | infileno++;
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143 | continue;
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144 | }
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145 | else if (strcmp(file, "") == 0) {
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146 | /*
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147 | if (infileno == (int)*ARGC - 1)
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148 | ifp = stdin;
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149 | */
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150 | infileno++;
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151 | continue;
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152 | }
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153 | else {
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154 | if (strcmp(file, "-") == 0)
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155 | ifp = stdin;
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156 | else
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157 | ifp = efopen(file, "r");
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158 | *FILENAME = file;
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159 | }
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160 | }
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161 | if (get1rec(s, ifp))
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162 | return 1;
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163 | else {
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164 | if (ifp != stdin)
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165 | fclose(ifp);
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166 | ifp = NULL;
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167 | infileno++;
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168 | }
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169 | }
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170 | ifp = stdin; /* for further "getline" */
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171 | *FILENAME = "-";
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172 | return 0; /* EOF */
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173 | }
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174 |
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175 | mkfld(rec, sep, fld) char *rec, *sep; CELL *fld[];
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176 | {
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177 | char *s, *t;
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178 | char str[BUFSIZ];
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179 | int i, j, n;
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180 | int skip = 0;
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181 |
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182 | if (strlen(sep) > 1)
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183 | return r_mkfld(rec, sep, fld);
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184 |
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185 | if (*sep == ' ' || *sep == '\0') {
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186 | sep = " \t\n"; skip++;
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187 | }
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188 | for (i = 1, n = (int) *NF; i <= n; i++) {
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189 | sfree(fld[i]->c_sval);
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190 | sfree(fld[i]);
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191 | fld[i] = NULL;
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192 | }
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193 | for (i = 0, s = rec; ; ) {
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194 | t = str;
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195 | if (skip) {
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196 | while (*s && strchr(" \t\n", *s))
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197 | s++;
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198 | if (*s == '\0')
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199 | break;
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200 | }
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201 | while (*s && !jStrchr(sep, *s)) {
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202 | if (isKanji(*s))
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203 | *t++ = *s++;
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204 | *t++ = *s++;
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205 | }
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206 | *t = '\0';
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207 | if (isnum(str))
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208 | fld[++i] = mkcell(FLD|STR|NUM, str, atof(str));
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209 | else
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210 | fld[++i] = mkcell(FLD|STR, str, 0.0);
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211 | if (*s)
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212 | s++;
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213 | else
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214 | break;
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215 | }
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216 | *NF = (double) i;
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217 | return i;
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218 | }
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219 |
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220 | static
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221 | r_mkfld(rec, sep, fld) char *rec, *sep; CELL *fld[];
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222 | {
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223 | char *s, *t;
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224 | char str[BUFSIZ];
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225 | int i, n;
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226 | regexp *mkpat();
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227 | extern int r_start, r_length;
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228 |
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229 | if (strcmp(*FS, fs_str) != 0) {
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230 | sfree(fs_str); sfree(fs_pat);
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231 | fs_str = strsave(*FS);
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232 | fs_pat = mkpat(fs_str);
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233 | }
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234 | for (i = 1, n = (int) *NF; i <= n; i++) {
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235 | sfree(fld[i]->c_sval);
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236 | sfree(fld[i]);
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237 | fld[i] = NULL;
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238 | }
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239 | for (i = 0, s = rec, t = str; *s; ) {
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240 | if (match(fs_pat, s)) {
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241 | for (n = r_start; --n > 0; )
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242 | *t++ = *s++;
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243 | }
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244 | else {
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245 | while (*s)
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246 | *t++ = *s++;
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247 | }
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248 | *t = '\0';
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249 | t = str;
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250 | fld[++i] = mkcell(FLD|STR, str, 0.0);
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251 | if (*s)
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252 | s += r_length;
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253 | }
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254 | *NF = (double) i;
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255 | return i;
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256 | }
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257 |
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258 | mkrec(u) CELL *u;
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259 | {
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260 | register char *s, *t;
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261 | register int i, j;
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262 |
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263 | for (j = (int)*NF, i = 1; i <= j; i++)
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264 | if (field[i] == u)
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265 | break;
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266 | if (i > j) {
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267 | for ( ; i < MAXFLD; i++)
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268 | if (field[i] == u)
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269 | break;
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270 | if (i == MAXFLD)
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271 | error("too many field (%d)", i);
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272 | *NF = (double)i;
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273 | }
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274 | for (t = record, i = 1, j = (int) *NF; i <= j; i++) {
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275 | if (i > 1)
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276 | *t++ = **OFS;
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277 | for (s = getsval(field[i]); *s; )
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278 | *t++ = *s++;
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279 | }
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280 | *t++ = '\0';
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281 | }
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282 |
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283 | CELL *
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284 | Field(p) NODE *p;
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285 | {
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286 | CELL *u;
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287 | int i, j;
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288 |
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289 | u = execute(p->n_arg[0]);
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290 | i = (int) getfval(u);
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291 | c_free(u);
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292 | j = (int)*NF;
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293 | if (i > j)
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294 | for (++j; j <= i; j++) {
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295 | if (field[j] == NULL)
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296 | field[j] = mkcell(FLD|STR, "", 0.0);
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297 | }
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298 | return field[i];
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299 | }
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300 |
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301 | CELL *
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302 | P1stat(p) NODE *p;
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303 | {
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304 | CELL *u;
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305 | double x;
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306 |
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307 | pateval++;
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308 | u = execute(p->n_arg[0]);
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309 | pateval = 0;
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310 | x = getfval(u);
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311 | c_free(u);
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312 | if (x != 0.0)
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313 | u = execute(p->n_arg[1]);
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314 | else
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315 | u = &truecell;
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316 | return u;
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317 | }
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318 |
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319 | CELL *
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320 | P2stat(p) NODE *p;
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321 | {
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322 | static stat = 0;
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323 | CELL *u, *v;
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324 | double x;
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325 |
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326 | switch (stat) {
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327 | case 0:
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328 | pateval++;
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329 | u = execute(p->n_arg[0]);
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330 | pateval = 0;
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331 | x = getfval(u);
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332 | c_free(u);
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333 | if (x == 0.0) {
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334 | u = &truecell; break;
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335 | }
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336 | else
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337 | stat++;
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338 | /* fall through */
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339 | case 1:
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340 | u = execute(p->n_arg[2]);
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341 | c_free(u);
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342 | pateval++;
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343 | u = execute(p->n_arg[1]);
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344 | pateval = 0;
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345 | x = getfval(u);
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346 | if (x != 0.0)
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347 | stat = 0;
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348 | break;
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349 | default:
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350 | u = &truecell;
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351 | break;
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352 | }
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353 | return u;
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354 | }
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355 |
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356 | CELL *
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357 | Print0()
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358 | {
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359 | /*
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360 | int i, j;
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361 | char *s, str[BUFSIZ];
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362 |
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363 | for (*str = '\0', i = 1, j = (int) *NF; i <= j; i++) {
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364 | if (i > 1)
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365 | strcat(str, *OFS);
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366 | s = getsval(field[i]);
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367 | strcat(str, s);
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368 | }
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369 | strcat(str, *ORS);
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370 | fputs(str, stdout);
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371 | */
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372 | fprintf(stdout, "%s%s", record, *ORS);
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373 | return &truecell;
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374 | }
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375 |
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376 | char *
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377 | format(t, p) char *t; NODE *p;
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378 | {
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379 | CELL *u, *v;
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380 | char *r, *s, *s0, fmt[BUFSIZ];
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381 | double x;
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382 | int i;
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383 |
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384 | u = execute(p->n_arg[2]);
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385 | s = s0 = getsval(u);
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386 | /*
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387 | printf("fmt(%s)\n", s);
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388 | */
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389 | for (i = 3; *s; s++) {
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390 | if (isKanji(*s)) {
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391 | *t++ = *s++; *t++ = *s; continue;
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392 | }
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393 | if (*s != '%') {
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394 | *t++ = *s; continue;
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395 | }
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396 | else if (*(s + 1) == '%') {
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397 | *t++ = *s++; continue;
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398 | }
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399 | for (r = fmt, *r++ = *s++; *r++ = *s; s++) {
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400 | if (strchr("%cdefgosux", *s))
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401 | break;
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402 | }
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403 | *r = '\0';
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404 | if (p->n_arg[i] == NULL)
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405 | error("not enough args in printf(%s)", s0);
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406 | v = execute(p->n_arg[i++]);
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407 | if (*s == 's')
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408 | r = getsval(v);
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409 | else
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410 | x = getfval(v);
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411 | /*
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412 | printf("val(%d)(%s)\n", v->c_type, v->c_sval);
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413 | */
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414 | switch (*s) {
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415 | case 'c':
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416 | sprintf(t, fmt, (int) x);
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417 | break;
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418 | case 'd':
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419 | if (*(s - 1) != 'l') {
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420 | *--r = 'l'; *++r = 'd'; *++r = '\0';
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421 | }
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422 | sprintf(t, fmt, (long) x);
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423 | break;
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424 | case 'e': case 'f': case 'g':
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425 | sprintf(t, fmt, x);
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426 | break;
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427 | case 'o': case 'u': case 'x':
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428 | if (*(s - 1) == 'l')
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429 | sprintf(t, fmt, (long) x);
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430 | else
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431 | sprintf(t, fmt, (int) x);
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432 | break;
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433 | case 's':
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434 | /*r = getsval(v);*/
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435 | sprintf(t, fmt, r);
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436 | break;
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437 | default:
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438 | strcpy(t, fmt);
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439 | break;
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440 | }
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441 | c_free(v);
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442 | t += strlen(t);
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443 | }
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444 | c_free(u);
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445 | *t = '\0';
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446 | }
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447 |
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448 | #define MAXFILE 10
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449 | struct {
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450 | char *f_name; /* file name */
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451 | FILE *f_fp;
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452 | int f_type;
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453 | } filetab[MAXFILE];
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454 |
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455 | FILE *
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456 | getfp(file, type) char *file;
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457 | {
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458 | register int i;
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459 | register char *name, *mode;
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460 | char *awktmp();
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461 | FILE *fp, *efopen(), *epopen();
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462 |
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463 | for (i = 0; i < MAXFILE; i++)
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464 | if (filetab[i].f_name && strcmp(filetab[i].f_name, file) == 0)
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465 | return filetab[i].f_fp;
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466 | for (i = 0; i < MAXFILE; i++)
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467 | if (!filetab[i].f_fp)
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468 | break;
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469 | if (i == MAXFILE)
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470 | error("too many files to open");
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471 | name = file;
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472 | switch (type) {
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473 | case R_OUT: mode = "w"; break;
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474 | case R_APD: mode = "a"; break;
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475 | case R_POUT:
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476 | #ifdef DOS
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477 | name = awktmp(i); mode = "w"; /* MS-DOS */
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478 | #else
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479 | fp = epopen(file, "w");
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480 | goto g1;
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481 | #endif
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482 | break;
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483 | case R_IN: mode = "r"; break;
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484 | case R_PIN:
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485 | #ifdef DOS
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486 | {
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487 | int savefd, fd, result;
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488 |
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489 | name = awktmp(i);
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490 | if ((fd = open(name,
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491 | O_WRONLY|O_TEXT|O_CREAT|O_TRUNC,S_IREAD|S_IWRITE)) == -1)
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492 | error("can't open %s", name);
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493 | savefd = dup(1); dup2(fd, 1); close(fd);
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494 | if ((result =
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495 | system(file)) == -1)
|
---|
496 | error("can't exec %s", file);
|
---|
497 | dup2(savefd, 1); close(savefd); close(fd);
|
---|
498 | mode = "r";
|
---|
499 | }
|
---|
500 | #else
|
---|
501 | fp = epopen(file,"r");
|
---|
502 | goto g1;
|
---|
503 | #endif
|
---|
504 | break;
|
---|
505 | }
|
---|
506 | fp = efopen(name, mode);
|
---|
507 | g1:
|
---|
508 | filetab[i].f_name = strsave(file);
|
---|
509 | filetab[i].f_type = type;
|
---|
510 | filetab[i].f_fp = fp;
|
---|
511 | return fp;
|
---|
512 | }
|
---|
513 |
|
---|
514 | closeall()
|
---|
515 | {
|
---|
516 | register int i;
|
---|
517 |
|
---|
518 | for (i = 0; i < MAXFILE; i++)
|
---|
519 | close1(i);
|
---|
520 | }
|
---|
521 |
|
---|
522 | CELL *
|
---|
523 | Close(s) char *s;
|
---|
524 | {
|
---|
525 | register int i;
|
---|
526 |
|
---|
527 | for (i = 0; i < MAXFILE; i++)
|
---|
528 | if (strcmp(s, filetab[i].f_name) == 0) {
|
---|
529 | close1(i);
|
---|
530 | break;
|
---|
531 | }
|
---|
532 | i = (i == MAXFILE) ? 0 : 1;
|
---|
533 | return mktmp(NUM, NULL, (double) i);
|
---|
534 | }
|
---|
535 |
|
---|
536 | static
|
---|
537 | close1(i)
|
---|
538 | {
|
---|
539 | int fd, result, savefd;
|
---|
540 | char *awktmp();
|
---|
541 |
|
---|
542 | if (filetab[i].f_fp == NULL)
|
---|
543 | return;
|
---|
544 | switch (filetab[i].f_type) {
|
---|
545 | case R_PIN:
|
---|
546 | #ifdef DOS
|
---|
547 | fclose(filetab[i].f_fp);
|
---|
548 | unlink(awktmp(i));
|
---|
549 | #else
|
---|
550 | pclose(filetab[i].f_fp);
|
---|
551 | #endif
|
---|
552 | break;
|
---|
553 | case R_IN: case R_OUT: case R_APD:
|
---|
554 | fclose(filetab[i].f_fp);
|
---|
555 | break;
|
---|
556 | case R_POUT:
|
---|
557 | #ifdef DOS
|
---|
558 | fclose(filetab[i].f_fp);
|
---|
559 | if ((fd = open(awktmp(i), O_RDONLY)) == NULL)
|
---|
560 | error("can't open %s", awktmp(i));
|
---|
561 | savefd = dup(0);
|
---|
562 | dup2(fd, 0);
|
---|
563 | close(fd);
|
---|
564 | if ((result =
|
---|
565 | system(filetab[i].f_name)) == -1)
|
---|
566 | /*
|
---|
567 | spawnl(P_WAIT, "/usr/bin/sh", "sh", "-c", filetab[i].f_name, (char *) 0)) == -1)
|
---|
568 | fprintf(stderr, "can't spawn /bin/sh\n");
|
---|
569 | */
|
---|
570 | error("can't exec %s", filetab[i].f_name);
|
---|
571 | dup2(savefd, 0);
|
---|
572 | close(savefd);
|
---|
573 | unlink(awktmp(i));
|
---|
574 | #else
|
---|
575 | pclose(filetab[i].f_fp);
|
---|
576 | #endif
|
---|
577 | break;
|
---|
578 | }
|
---|
579 | sfree(filetab[i].f_name);
|
---|
580 | filetab[i].f_type = 0;
|
---|
581 | filetab[i].f_name = NULL;
|
---|
582 | filetab[i].f_fp = NULL;
|
---|
583 | }
|
---|
584 |
|
---|
585 | #ifndef DOS
|
---|
586 | FILE *
|
---|
587 | epopen(file, mod) char *file, *mod;
|
---|
588 | {
|
---|
589 | FILE *fp, *popen();
|
---|
590 |
|
---|
591 | if ((fp = popen(file, mod)) == NULL)
|
---|
592 | error("can't poen %s", file);
|
---|
593 | return fp;
|
---|
594 | }
|
---|
595 | #endif
|
---|
596 |
|
---|
597 | static char *
|
---|
598 | awktmp(i)
|
---|
599 | {
|
---|
600 | static char str[16];
|
---|
601 |
|
---|
602 | sprintf(str, "awk000%02d.tmp", i);
|
---|
603 | return str;
|
---|
604 | }
|
---|
605 |
|
---|
606 | Index(s, t) char *s, *t;
|
---|
607 | {
|
---|
608 | register char *u, *v;
|
---|
609 | register int i;
|
---|
610 |
|
---|
611 | for (i = 1; *s; s++, i++) {
|
---|
612 | for (u = s, v = t; *v; u++, v++) {
|
---|
613 | if (isKanji(*v)) {
|
---|
614 | if (*u != *v)
|
---|
615 | break;
|
---|
616 | u++; v++;
|
---|
617 | }
|
---|
618 | if (*u != *v)
|
---|
619 | break;
|
---|
620 | }
|
---|
621 | if (*v == '\0')
|
---|
622 | return i;
|
---|
623 | if (isKanji(*s))
|
---|
624 | s++;
|
---|
625 | }
|
---|
626 | return 0;
|
---|
627 | }
|
---|