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0
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1 /* mf.c - mail filter subroutines */
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2 #ifndef lint
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12
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3 static char ident[] = "@(#)$Id: mf.c,v 1.1.1.1 2005/04/18 14:46:07 kono Exp $";
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0
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4 #endif /* lint */
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5
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6 #include "mf.h"
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7 #include <ctype.h>
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8 #include <stdio.h>
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9
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10 static int isat(), parse_address(), phrase();
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11 static int route_addr(), local_part(), domain(), route();
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12 static int my_lex();
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13 static void compress();
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14 /* */
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15
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16 static char *getcpy (s)
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17 register char *s;
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18 {
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19 register char *p;
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20
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21 if (!s) {s = "";}
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22 if ((p = malloc ((unsigned) (strlen (s) + 2))) != NULL)
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23 (void) strcpy (p, s);
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24 return p;
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25 }
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26
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27
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28 static char *add (s1, s2)
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29 register char *s1,
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30 *s2;
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31 {
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32 register char *p;
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33
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34 if (s2 == NULL)
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35 return getcpy (s1);
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36
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37 if ((p = malloc ((unsigned) (strlen (s1) + strlen (s2) + 2))) != NULL)
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38 (void) sprintf (p, "%s%s", s2, s1);
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39 free (s2);
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40 return p;
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41 }
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42
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43 /* */
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44
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45 int isfrom (string)
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46 register char *string;
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47 {
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48 return (strncmp (string, "From ", 5) == 0
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49 || strncmp (string, ">From ", 6) == 0);
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50 }
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51
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52
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53 int lequal (a, b)
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54 register char *a,
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55 *b;
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56 {
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57 for (; *a; a++, b++)
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58 if (*b == 0)
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59 return FALSE;
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60 else {
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61 char c1 = islower (*a & 0xff) ? toupper (*a) : *a;
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62 char c2 = islower (*b & 0xff) ? toupper (*b) : *b;
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63 if (c1 != c2)
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64 return FALSE;
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65 }
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66
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67 return (*b == 0);
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68 }
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69
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70 /* */
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71
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72 /*
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73 *
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74 * seekadrx() is tricky. We want to cover both UUCP-style and ARPA-style
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75 * addresses, so for each list of addresses we see if we can find some
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76 * character to give us a hint.
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77 *
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78 */
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79
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80
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81 #define CHKADR 0 /* undertermined address style */
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82 #define UNIXDR 1 /* UNIX-style address */
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83 #define ARPADR 2 /* ARPAnet-style address */
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84
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85
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86 static char *punctuators = ";<>.()[]";
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87 static char *vp = NULL;
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88 static char *tp = NULL;
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89
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90 static struct adrx adrxs1;
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91
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92 /* */
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93
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94 struct adrx *seekadrx (addrs)
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95 register char *addrs;
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96 {
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97 static int state = CHKADR;
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98 register char *cp;
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99 register struct adrx *adrxp;
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100
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101 if (state == CHKADR)
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102 for (state = UNIXDR, cp = addrs; *cp; cp++)
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103 if (index (punctuators, *cp)) {
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104 state = ARPADR;
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105 break;
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106 }
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107
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108 switch (state) {
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109 case UNIXDR:
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110 adrxp = uucpadrx (addrs);
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111 break;
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112
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113 case ARPADR:
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114 default:
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115 adrxp = getadrx (addrs);
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116 break;
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117 }
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118
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119 if (adrxp == NULL)
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120 state = CHKADR;
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121
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122 return adrxp;
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123 }
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124
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125 /* */
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126
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127 /*
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128 *
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129 * uucpadrx() implements a partial UUCP-style address parser. It's based
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130 * on the UUCP notion that addresses are separated by spaces or commas.
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131 *
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132 */
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133
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134
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135 struct adrx *uucpadrx (addrs)
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136 register char *addrs;
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137 {
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138 register char *cp,
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139 *wp,
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140 *xp,
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141 *yp,
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142 *zp;
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143 register struct adrx *adrxp = &adrxs1;
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144
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145 if (vp == NULL) {
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146 vp = tp = getcpy (addrs);
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147 compress (addrs, vp);
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148 }
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149 else
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150 if (tp == NULL) {
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151 free (vp);
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152 vp = NULL;
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153 return NULL;
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154 }
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155
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156 for (cp = tp; isspace (*cp & 0xff); cp++)
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157 continue;
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158 if (*cp == 0) {
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159 free (vp);
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160 vp = tp = NULL;
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161 return NULL;
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162 }
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163
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164 /* */
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165
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166 if ((wp = index (cp, ',')) == NULL)
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167 if ((wp = index (cp, ' ')) != NULL) {
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168 xp = wp;
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169 while (isspace (*xp & 0xff))
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170 xp++;
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171 if (*xp != 0 && isat (--xp)) {
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172 yp = xp + 4;
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173 while (isspace (*yp & 0xff))
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174 yp++;
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175 if (*yp != 0)
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176 if ((zp = index (yp, ' ')) != NULL)
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177 *zp = 0, tp = ++zp;
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178 else
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179 tp = NULL;
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180 else
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181 *wp = 0, tp = ++wp;
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182 }
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183 else
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184 *wp = 0, tp = ++wp;
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185 }
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186 else
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187 tp = NULL;
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188 else
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189 *wp = 0, tp = ++wp;
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190
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191 if (adrxp -> text)
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192 free (adrxp -> text);
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193 adrxp -> text = getcpy (cp);
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194 adrxp -> mbox = cp;
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195 adrxp -> host = adrxp -> path = NULL;
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196 if ((wp = rindex (cp, '@')) != NULL) {
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197 *wp++ = 0;
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198 adrxp -> host = *wp ? wp : NULL;
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199 }
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200 else
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201 for (wp = cp + strlen (cp) - 4; wp >= cp; wp--)
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202 if (isat (wp)) {
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203 *wp++ = 0;
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204 adrxp -> host = wp + 3;
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205 }
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206
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207 adrxp -> pers = adrxp -> grp = adrxp -> note = adrxp -> err = NULL;
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208 adrxp -> ingrp = 0;
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209
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210 return adrxp;
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211 }
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212
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213 /* */
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214
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215 static void compress (fp, tp)
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216 register char *fp,
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217 *tp;
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218 {
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219 register char c,
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220 *cp;
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221
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222 for (c = ' ', cp = tp; (*tp = *fp++) != 0;)
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223 if (isspace (*tp & 0xff)) {
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224 if (c != ' ')
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225 *tp++ = c = ' ';
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226 }
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227 else
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228 c = *tp++;
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229
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230 if (c == ' ' && cp < tp)
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231 *--tp = 0;
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232 }
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233
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234
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235 static int isat (p)
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236 register char *p;
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237 {
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238 return (strncmp (p, " AT ", 4)
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239 && strncmp (p, " At ", 4)
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240 && strncmp (p, " aT ", 4)
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241 && strncmp (p, " at ", 4) ? FALSE : TRUE);
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242 }
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243
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244 /* */
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245
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246 /*
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247 *
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248 * getadrx() implements a partial 822-style address parser. The parser
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249 * is neither complete nor correct. It does however recognize nearly all
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250 * of the 822 address syntax. In addition it handles the majority of the
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251 * 733 syntax as well. Most problems arise from trying to accomodate both.
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252 *
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253 * In terms of 822, the route-specification in
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254 *
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255 * "<" [route] local-part "@" domain ">"
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256 *
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257 * is parsed and returned unchanged. Multiple at-signs are compressed
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258 * via source-routing. Recursive groups are not allowed as per the
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259 * standard.
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260 *
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261 * In terms of 733, " at " is recognized as equivalent to "@".
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262 *
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263 * In terms of both the parser will not complain about missing hosts.
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264 *
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265 * -----
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266 *
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267 * We should not allow addresses like
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268 *
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269 * Marshall T. Rose <MRose@UCI>
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270 *
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271 * but should insist on
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272 *
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273 * "Marshall T. Rose" <MRose@UCI>
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274 *
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275 * Unfortunately, a lot of mailers stupidly let people get away with this.
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276 *
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277 * -----
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278 *
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279 * We should not allow addresses like
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280 *
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281 * <MRose@UCI>
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282 *
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283 * but should insist on
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284 *
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285 * MRose@UCI
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286 *
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287 * Unfortunately, a lot of mailers stupidly let people's UAs get away with
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288 * this.
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289 *
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290 * -----
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291 *
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292 * We should not allow addresses like
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293 *
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294 * @UCI:MRose@UCI-750a
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295 *
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296 * but should insist on
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297 *
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298 * Marshall Rose <@UCI:MRose@UCI-750a>
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299 *
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300 * Unfortunately, a lot of mailers stupidly do this.
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301 *
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302 */
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303
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304 /* */
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305
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306 #define QUOTE '\\'
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307
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308 #define LX_END 0
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309 #define LX_ERR 1
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310 #define LX_ATOM 2
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311 #define LX_QSTR 3
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312 #define LX_DLIT 4
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313 #define LX_SEMI 5
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314 #define LX_COMA 6
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315 #define LX_LBRK 7
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316 #define LX_RBRK 8
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317 #define LX_COLN 9
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318 #define LX_DOT 10
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319 #define LX_AT 11
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320
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321 static struct {
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322 char lx_chr;
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323 int lx_val;
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324 } special[] = {
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325 ';', LX_SEMI,
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326 ',', LX_COMA,
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327 '<', LX_LBRK,
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328 '>', LX_RBRK,
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329 ':', LX_COLN,
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330 '.', LX_DOT,
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331 '@', LX_AT,
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332 '(', LX_ERR,
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333 ')', LX_ERR,
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334 QUOTE, LX_ERR,
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335 '"', LX_ERR,
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336 '[', LX_ERR,
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337 ']', LX_ERR,
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338 0, 0
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339 };
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340
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341 /* */
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342
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343 static int glevel = 0;
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344 static int ingrp = 0;
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345 static int last_lex = LX_END;
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346
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347 static char *dp = NULL;
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348 static char *cp = NULL;
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349 static char *ap = NULL;
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350 static char *pers = NULL;
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351 static char *mbox = NULL;
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352 static char *host = NULL;
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353 static char *path = NULL;
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354 static char *grp = NULL;
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355 static char *note = NULL;
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356 static char err[BUFSIZ];
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357 static char adr[BUFSIZ];
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358
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359 static struct adrx adrxs2;
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360
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361 /* */
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362
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363 struct adrx *getadrx (addrs)
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364 register char *addrs;
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365 {
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366 register char *bp;
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367 register struct adrx *adrxp = &adrxs2;
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368
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369 if (pers)
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370 free (pers);
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371 if (mbox)
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372 free (mbox);
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373 if (host)
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374 free (host);
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375 if (path)
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376 free (path);
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377 if (grp)
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378 free (grp);
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379 if (note)
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380 free (note);
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381 pers = mbox = host = path = grp = note = NULL;
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382 err[0] = 0;
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383
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384 if (dp == NULL) {
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385 dp = cp = getcpy (addrs ? addrs : "");
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386 glevel = 0;
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387 }
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388 else
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389 if (cp == NULL) {
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390 free (dp);
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391 dp = NULL;
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392 return NULL;
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393 }
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394
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395 switch (parse_address ()) {
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396 case DONE:
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397 free (dp);
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398 dp = cp = NULL;
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399 return NULL;
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400
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401 case OK:
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402 switch (last_lex) {
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403 case LX_COMA:
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404 case LX_END:
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405 break;
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406
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407 default: /* catch trailing comments */
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408 bp = cp;
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409 (void) my_lex (adr);
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410 cp = bp;
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411 break;
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412 }
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413 break;
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414
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415 default:
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416 break;
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417 }
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418
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419 if (err[0])
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420 for (;;) {
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421 switch (last_lex) {
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422 case LX_COMA:
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423 case LX_END:
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424 break;
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425
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426 default:
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427 (void) my_lex (adr);
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428 continue;
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429 }
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430 break;
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431 }
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432 while (isspace (*ap & 0xff))
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433 ap++;
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434 if (cp)
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12
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435 (void) sprintf (adr, "%.*s", (int)(cp - ap), ap);
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0
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436 else
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437 (void) strcpy (adr, ap);
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438 bp = adr + strlen (adr) - 1;
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439 if (*bp == ',' || *bp == ';' || *bp == '\n')
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440 *bp = 0;
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441
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442 /* */
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443
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444 adrxp -> text = adr;
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445 adrxp -> pers = pers;
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446 adrxp -> mbox = mbox;
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447 adrxp -> host = host;
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448 adrxp -> path = path;
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449 adrxp -> grp = grp;
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450 adrxp -> ingrp = ingrp;
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451 adrxp -> note = note;
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452 adrxp -> err = err[0] ? err : NULL;
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453
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454 return adrxp;
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455 }
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456
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457 /* */
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458
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459 static int parse_address () {
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460 char buffer[BUFSIZ];
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461
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462 again: ;
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463 ap = cp;
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|
464 switch (my_lex (buffer)) {
|
|
|
465 case LX_ATOM:
|
|
|
466 case LX_QSTR:
|
|
|
467 pers = getcpy (buffer);
|
|
|
468 break;
|
|
|
469
|
|
|
470 case LX_SEMI:
|
|
|
471 if (glevel-- <= 0) {
|
|
|
472 (void) strcpy (err, "extraneous semi-colon");
|
|
|
473 return NOTOK;
|
|
|
474 }
|
|
|
475 case LX_COMA:
|
|
|
476 if (note) {
|
|
|
477 free (note);
|
|
|
478 note = NULL;
|
|
|
479 }
|
|
|
480 goto again;
|
|
|
481
|
|
|
482 case LX_END:
|
|
|
483 return DONE;
|
|
|
484
|
|
|
485 case LX_LBRK: /* sigh (2) */
|
|
|
486 goto get_addr;
|
|
|
487
|
|
|
488 case LX_AT: /* sigh (3) */
|
|
|
489 cp = ap;
|
|
|
490 if (route_addr (buffer) == NOTOK)
|
|
|
491 return NOTOK;
|
|
|
492 return OK; /* why be choosy? */
|
|
|
493
|
|
|
494 default:
|
|
|
495 (void) sprintf (err, "illegal address construct (%s)", buffer);
|
|
|
496 return NOTOK;
|
|
|
497 }
|
|
|
498
|
|
|
499 /* */
|
|
|
500
|
|
|
501 switch (my_lex (buffer)) {
|
|
|
502 case LX_ATOM:
|
|
|
503 case LX_QSTR:
|
|
|
504 pers = add (buffer, add (" ", pers));
|
|
|
505 more_phrase: ; /* sigh (1) */
|
|
|
506 if (phrase (buffer) == NOTOK)
|
|
|
507 return NOTOK;
|
|
|
508
|
|
|
509 switch (last_lex) {
|
|
|
510 case LX_LBRK:
|
|
|
511 get_addr: ;
|
|
|
512 if (route_addr (buffer) == NOTOK)
|
|
|
513 return NOTOK;
|
|
|
514 if (last_lex == LX_RBRK)
|
|
|
515 return OK;
|
|
|
516 (void) sprintf (err, "missing right-bracket (%s)", buffer);
|
|
|
517 return NOTOK;
|
|
|
518
|
|
|
519 case LX_COLN:
|
|
|
520 get_group: ;
|
|
|
521 if (glevel++ > 0) {
|
|
|
522 (void) sprintf (err, "nested groups not allowed (%s)",
|
|
|
523 pers);
|
|
|
524 return NOTOK;
|
|
|
525 }
|
|
|
526 grp = add (": ", pers);
|
|
|
527 pers = NULL;
|
|
|
528 {
|
|
|
529 char *pp = cp;
|
|
|
530
|
|
|
531 for (;;)
|
|
|
532 switch (my_lex (buffer)) {
|
|
|
533 case LX_SEMI:
|
|
|
534 case LX_END: /* tsk, tsk */
|
|
|
535 glevel--;
|
|
|
536 return OK;
|
|
|
537
|
|
|
538 case LX_COMA:
|
|
|
539 continue;
|
|
|
540
|
|
|
541 default:
|
|
|
542 cp = pp;
|
|
|
543 return parse_address ();
|
|
|
544 }
|
|
|
545 }
|
|
|
546
|
|
|
547 case LX_DOT: /* sigh (1) */
|
|
|
548 pers = add (".", pers);
|
|
|
549 goto more_phrase;
|
|
|
550
|
|
|
551 default:
|
|
|
552 (void) sprintf (err,
|
|
|
553 "no mailbox in address, only a phrase (%s%s)",
|
|
|
554 pers, buffer);
|
|
|
555 return NOTOK;
|
|
|
556 }
|
|
|
557
|
|
|
558 /* */
|
|
|
559
|
|
|
560 case LX_LBRK:
|
|
|
561 goto get_addr;
|
|
|
562
|
|
|
563 case LX_COLN:
|
|
|
564 goto get_group;
|
|
|
565
|
|
|
566 case LX_DOT:
|
|
|
567 mbox = add (buffer, pers);
|
|
|
568 pers = NULL;
|
|
|
569 if (route_addr (buffer) == NOTOK)
|
|
|
570 return NOTOK;
|
|
|
571 goto check_end;
|
|
|
572
|
|
|
573 case LX_AT:
|
|
|
574 ingrp = glevel;
|
|
|
575 mbox = pers;
|
|
|
576 pers = NULL;
|
|
|
577 if (domain (buffer) == NOTOK)
|
|
|
578 return NOTOK;
|
|
|
579 check_end: ;
|
|
|
580 switch (last_lex) {
|
|
|
581 case LX_SEMI:
|
|
|
582 if (glevel-- <= 0) {
|
|
|
583 (void) strcpy (err, "extraneous semi-colon");
|
|
|
584 return NOTOK;
|
|
|
585 }
|
|
|
586 case LX_COMA:
|
|
|
587 case LX_END:
|
|
|
588 return OK;
|
|
|
589
|
|
|
590 default:
|
|
|
591 (void) sprintf (err, "junk after local@domain (%s)",
|
|
|
592 buffer);
|
|
|
593 return NOTOK;
|
|
|
594 }
|
|
|
595
|
|
|
596 case LX_SEMI: /* no host */
|
|
|
597 case LX_COMA:
|
|
|
598 case LX_END:
|
|
|
599 ingrp = glevel;
|
|
|
600 if (last_lex == LX_SEMI && glevel-- <= 0) {
|
|
|
601 (void) strcpy (err, "extraneous semi-colon");
|
|
|
602 return NOTOK;
|
|
|
603 }
|
|
|
604 mbox = pers;
|
|
|
605 pers = NULL;
|
|
|
606 return OK;
|
|
|
607
|
|
|
608 default:
|
|
|
609 (void) sprintf (err, "missing mailbox (%s)", buffer);
|
|
|
610 return NOTOK;
|
|
|
611 }
|
|
|
612 }
|
|
|
613
|
|
|
614 /* */
|
|
|
615
|
|
|
616 static int phrase (buffer)
|
|
|
617 register char *buffer;
|
|
|
618 {
|
|
|
619 for (;;)
|
|
|
620 switch (my_lex (buffer)) {
|
|
|
621 case LX_ATOM:
|
|
|
622 case LX_QSTR:
|
|
|
623 pers = add (buffer, add (" ", pers));
|
|
|
624 continue;
|
|
|
625
|
|
|
626 default:
|
|
|
627 return OK;
|
|
|
628 }
|
|
|
629 }
|
|
|
630
|
|
|
631 /* */
|
|
|
632
|
|
|
633 static int route_addr (buffer)
|
|
|
634 register char *buffer;
|
|
|
635 {
|
|
|
636 register char *pp = cp;
|
|
|
637
|
|
|
638 if (my_lex (buffer) == LX_AT) {
|
|
|
639 if (route (buffer) == NOTOK)
|
|
|
640 return NOTOK;
|
|
|
641 }
|
|
|
642 else
|
|
|
643 cp = pp;
|
|
|
644
|
|
|
645 if (local_part (buffer) == NOTOK)
|
|
|
646 return NOTOK;
|
|
|
647
|
|
|
648 switch (last_lex) {
|
|
|
649 case LX_AT:
|
|
|
650 return domain (buffer);
|
|
|
651
|
|
|
652 case LX_SEMI: /* if in group */
|
|
|
653 case LX_RBRK: /* no host */
|
|
|
654 case LX_COMA:
|
|
|
655 case LX_END:
|
|
|
656 return OK;
|
|
|
657
|
|
|
658 default:
|
|
|
659 (void) sprintf (err, "no at-sign after local-part (%s)", buffer);
|
|
|
660 return NOTOK;
|
|
|
661 }
|
|
|
662 }
|
|
|
663
|
|
|
664 /* */
|
|
|
665
|
|
|
666 static int local_part (buffer)
|
|
|
667 register char *buffer;
|
|
|
668 {
|
|
|
669 ingrp = glevel;
|
|
|
670
|
|
|
671 for (;;) {
|
|
|
672 switch (my_lex (buffer)) {
|
|
|
673 case LX_ATOM:
|
|
|
674 case LX_QSTR:
|
|
|
675 mbox = add (buffer, mbox);
|
|
|
676 break;
|
|
|
677
|
|
|
678 default:
|
|
|
679 (void) sprintf (err, "no mailbox in local-part (%s)", buffer);
|
|
|
680 return NOTOK;
|
|
|
681 }
|
|
|
682
|
|
|
683 switch (my_lex (buffer)) {
|
|
|
684 case LX_DOT:
|
|
|
685 mbox = add (buffer, mbox);
|
|
|
686 continue;
|
|
|
687
|
|
|
688 default:
|
|
|
689 return OK;
|
|
|
690 }
|
|
|
691 }
|
|
|
692 }
|
|
|
693
|
|
|
694 /* */
|
|
|
695
|
|
|
696 static int domain (buffer)
|
|
|
697 register char *buffer;
|
|
|
698 {
|
|
|
699 for (;;) {
|
|
|
700 switch (my_lex (buffer)) {
|
|
|
701 case LX_ATOM:
|
|
|
702 case LX_DLIT:
|
|
|
703 host = add (buffer, host);
|
|
|
704 break;
|
|
|
705
|
|
|
706 default:
|
|
|
707 (void) sprintf (err,
|
|
|
708 "no sub-domain in domain-part of address (%s)",
|
|
|
709 buffer);
|
|
|
710 return NOTOK;
|
|
|
711 }
|
|
|
712
|
|
|
713 switch (my_lex (buffer)) {
|
|
|
714 case LX_DOT:
|
|
|
715 host = add (buffer, host);
|
|
|
716 continue;
|
|
|
717
|
|
|
718 case LX_AT: /* sigh (0) */
|
|
|
719 mbox = add (host, add ("%", mbox));
|
|
|
720 free (host);
|
|
|
721 host = NULL;
|
|
|
722 continue;
|
|
|
723
|
|
|
724 default:
|
|
|
725 return OK;
|
|
|
726 }
|
|
|
727 }
|
|
|
728 }
|
|
|
729
|
|
|
730 /* */
|
|
|
731
|
|
|
732 static int route (buffer)
|
|
|
733 register char *buffer;
|
|
|
734 {
|
|
|
735 path = getcpy ("@");
|
|
|
736
|
|
|
737 for (;;) {
|
|
|
738 switch (my_lex (buffer)) {
|
|
|
739 case LX_ATOM:
|
|
|
740 case LX_DLIT:
|
|
|
741 path = add (buffer, path);
|
|
|
742 break;
|
|
|
743
|
|
|
744 default:
|
|
|
745 (void) sprintf (err,
|
|
|
746 "no sub-domain in domain-part of address (%s)",
|
|
|
747 buffer);
|
|
|
748 return NOTOK;
|
|
|
749 }
|
|
|
750 switch (my_lex (buffer)) {
|
|
|
751 case LX_COMA:
|
|
|
752 path = add (buffer, path);
|
|
|
753 for (;;) {
|
|
|
754 switch (my_lex (buffer)) {
|
|
|
755 case LX_COMA:
|
|
|
756 continue;
|
|
|
757
|
|
|
758 case LX_AT:
|
|
|
759 path = add (buffer, path);
|
|
|
760 break;
|
|
|
761
|
|
|
762 default:
|
|
|
763 (void) sprintf (err,
|
|
|
764 "no at-sign found for next domain in route (%s)",
|
|
|
765 buffer);
|
|
|
766 }
|
|
|
767 break;
|
|
|
768 }
|
|
|
769 continue;
|
|
|
770
|
|
|
771 case LX_AT: /* XXX */
|
|
|
772 case LX_DOT:
|
|
|
773 path = add (buffer, path);
|
|
|
774 continue;
|
|
|
775
|
|
|
776 case LX_COLN:
|
|
|
777 path = add (buffer, path);
|
|
|
778 return OK;
|
|
|
779
|
|
|
780 default:
|
|
|
781 (void) sprintf (err,
|
|
|
782 "no colon found to terminate route (%s)", buffer);
|
|
|
783 return NOTOK;
|
|
|
784 }
|
|
|
785 }
|
|
|
786 }
|
|
|
787
|
|
|
788 /* */
|
|
|
789
|
|
|
790 static int my_lex (buffer)
|
|
|
791 register char *buffer;
|
|
|
792 {
|
|
|
793 int i, gotat = 0;
|
|
|
794 register char c,
|
|
|
795 *bp;
|
|
|
796
|
|
|
797 bp = buffer;
|
|
|
798 *bp = 0;
|
|
|
799 if (!cp)
|
|
|
800 return (last_lex = LX_END);
|
|
|
801
|
|
|
802 gotat = isat (cp);
|
|
|
803 c = *cp++;
|
|
|
804 while (isspace (c & 0xff))
|
|
|
805 c = *cp++;
|
|
|
806 if (c == 0) {
|
|
|
807 cp = NULL;
|
|
|
808 return (last_lex = LX_END);
|
|
|
809 }
|
|
|
810
|
|
|
811 if (c == '(')
|
|
|
812 for (*bp++ = c, i = 0;;)
|
|
|
813 switch (c = *cp++) {
|
|
|
814 case 0:
|
|
|
815 cp = NULL;
|
|
|
816 return (last_lex = LX_ERR);
|
|
|
817 case QUOTE:
|
|
|
818 *bp++ = c;
|
|
|
819 if ((c = *cp++) == 0) {
|
|
|
820 cp = NULL;
|
|
|
821 return (last_lex = LX_ERR);
|
|
|
822 }
|
|
|
823 *bp++ = c;
|
|
|
824 continue;
|
|
|
825 case '(':
|
|
|
826 i++;
|
|
|
827 default:
|
|
|
828 *bp++ = c;
|
|
|
829 continue;
|
|
|
830 case ')':
|
|
|
831 *bp++ = c;
|
|
|
832 if (--i < 0) {
|
|
|
833 *bp = 0;
|
|
|
834 note = note ? add (buffer, add (" ", note))
|
|
|
835 : getcpy (buffer);
|
|
|
836 return my_lex (buffer);
|
|
|
837 }
|
|
|
838 }
|
|
|
839
|
|
|
840 /* */
|
|
|
841
|
|
|
842 if (c == '"')
|
|
|
843 for (*bp++ = c;;)
|
|
|
844 switch (c = *cp++) {
|
|
|
845 case 0:
|
|
|
846 cp = NULL;
|
|
|
847 return (last_lex = LX_ERR);
|
|
|
848 case QUOTE:
|
|
|
849 *bp++ = c;
|
|
|
850 if ((c = *cp++) == 0) {
|
|
|
851 cp = NULL;
|
|
|
852 return (last_lex = LX_ERR);
|
|
|
853 }
|
|
|
854 default:
|
|
|
855 *bp++ = c;
|
|
|
856 continue;
|
|
|
857 case '"':
|
|
|
858 *bp++ = c;
|
|
|
859 *bp = 0;
|
|
|
860 return (last_lex = LX_QSTR);
|
|
|
861 }
|
|
|
862
|
|
|
863 if (c == '[')
|
|
|
864 for (*bp++ = c;;)
|
|
|
865 switch (c = *cp++) {
|
|
|
866 case 0:
|
|
|
867 cp = NULL;
|
|
|
868 return (last_lex = LX_ERR);
|
|
|
869 case QUOTE:
|
|
|
870 *bp++ = c;
|
|
|
871 if ((c = *cp++) == 0) {
|
|
|
872 cp = NULL;
|
|
|
873 return (last_lex = LX_ERR);
|
|
|
874 }
|
|
|
875 default:
|
|
|
876 *bp++ = c;
|
|
|
877 continue;
|
|
|
878 case ']':
|
|
|
879 *bp++ = c;
|
|
|
880 *bp = 0;
|
|
|
881 return (last_lex = LX_DLIT);
|
|
|
882 }
|
|
|
883
|
|
|
884 /* */
|
|
|
885
|
|
|
886 *bp++ = c;
|
|
|
887 *bp = 0;
|
|
|
888 for (i = 0; special[i].lx_chr != 0; i++)
|
|
|
889 if (c == special[i].lx_chr)
|
|
|
890 return (last_lex = special[i].lx_val);
|
|
|
891
|
|
|
892 if (iscntrl (c & 0x7f))
|
|
|
893 return (last_lex = LX_ERR);
|
|
|
894
|
|
|
895 for (;;) {
|
|
|
896 if ((c = *cp++) == 0)
|
|
|
897 break;
|
|
|
898 for (i = 0; special[i].lx_chr != 0; i++)
|
|
|
899 if (c == special[i].lx_chr)
|
|
|
900 goto got_atom;
|
|
|
901 if (iscntrl (c & 0x7f) || isspace (c & 0xff))
|
|
|
902 break;
|
|
|
903 *bp++ = c;
|
|
|
904 }
|
|
|
905 got_atom: ;
|
|
|
906 if (c == 0)
|
|
|
907 cp = NULL;
|
|
|
908 else
|
|
|
909 cp--;
|
|
|
910 *bp = 0;
|
|
|
911 last_lex = !gotat || cp == NULL || index (cp, '<') != NULL
|
|
|
912 ? LX_ATOM : LX_AT;
|
|
|
913 return last_lex;
|
|
|
914 }
|
|
|
915
|
|
|
916 /* */
|
|
|
917
|
|
|
918 char *legal_person (p)
|
|
|
919 register char *p;
|
|
|
920 {
|
|
|
921 int i;
|
|
|
922 register char *cp;
|
|
|
923 static char buffer[BUFSIZ];
|
|
|
924
|
|
|
925 if (*p == '"')
|
|
|
926 return p;
|
|
|
927 for (cp = p; *cp; cp++)
|
|
|
928 for (i = 0; special[i].lx_chr; i++)
|
|
|
929 if (*cp == special[i].lx_chr) {
|
|
|
930 (void) sprintf (buffer, "\"%s\"", p);
|
|
|
931 return buffer;
|
|
|
932 }
|
|
|
933
|
|
|
934 return p;
|
|
|
935 }
|
|
|
936
|
|
|
937 /* */
|
|
|
938
|
|
|
939 int mfgets (in, bp)
|
|
|
940 register FILE *in;
|
|
|
941 register char **bp;
|
|
|
942 {
|
|
|
943 int i;
|
|
|
944 register char *cp,
|
|
|
945 *dp,
|
|
|
946 *ep;
|
|
|
947 static int len = 0;
|
|
|
948 static char *pp = NULL;
|
|
|
949
|
|
|
950 if (pp == NULL)
|
|
|
951 if ((pp = malloc ((unsigned) (len = BUFSIZ))) == NULL)
|
|
|
952 return NOTOK;
|
|
|
953
|
|
|
954 for (ep = (cp = pp) + len - 2;;) {
|
|
|
955 switch (i = getc (in)) {
|
|
|
956 case EOF:
|
|
|
957 eol: ;
|
|
|
958 if (cp != pp) {
|
|
|
959 *cp = 0;
|
|
|
960 *bp = pp;
|
|
|
961 return OK;
|
|
|
962 }
|
|
|
963 eoh: ;
|
|
|
964 *bp = NULL;
|
|
|
965 free (pp);
|
|
|
966 pp = NULL;
|
|
|
967 return DONE;
|
|
|
968
|
|
|
969 case 0:
|
|
|
970 continue;
|
|
|
971
|
|
|
972 case '\n':
|
|
|
973 if (cp == pp) /* end of headers, gobble it */
|
|
|
974 goto eoh;
|
|
|
975 switch (i = getc (in)) {
|
|
|
976 default: /* end of line */
|
|
|
977 case '\n': /* end of headers, save for next call */
|
|
|
978 (void) ungetc (i, in);
|
|
|
979 goto eol;
|
|
|
980
|
|
|
981 case ' ': /* continue headers */
|
|
|
982 case '\t':
|
|
|
983 *cp++ = '\n';
|
|
|
984 break;
|
|
|
985 } /* fall into default case */
|
|
|
986
|
|
|
987 default:
|
|
|
988 *cp++ = i;
|
|
|
989 break;
|
|
|
990 }
|
|
|
991 if (cp >= ep)
|
|
|
992 if ((dp = realloc (pp, (unsigned) (len += BUFSIZ))) == NULL) {
|
|
|
993 free (pp);
|
|
|
994 pp = NULL;
|
|
|
995 return NOTOK;
|
|
|
996 }
|
|
|
997 else
|
|
|
998 cp += dp - pp, ep = (pp = cp) + len - 2;
|
|
|
999 }
|
|
|
1000 }
|
