Commit | Line | Data |
---|---|---|
9c79dca0 BJ |
1 | #include <stdio.h> |
2 | #include <ctype.h> | |
3 | ||
4 | FILE *dfile; | |
5 | char *filenam = "/usr/dict/words"; | |
6 | ||
7 | int fold; | |
8 | int dict; | |
9 | int tab; | |
10 | char entry[250]; | |
11 | char word[250]; | |
12 | char key[50]; | |
13 | ||
14 | main(argc,argv) | |
15 | char **argv; | |
16 | { | |
17 | register c; | |
18 | long top,bot,mid; | |
19 | while(argc>=2 && *argv[1]=='-') { | |
20 | for(;;) { | |
21 | switch(*++argv[1]) { | |
22 | case 'd': | |
23 | dict++; | |
24 | continue; | |
25 | case 'f': | |
26 | fold++; | |
27 | continue; | |
28 | case 't': | |
29 | tab = argv[1][1]; | |
30 | if(tab) | |
31 | ++argv[1]; | |
32 | continue; | |
33 | case 0: | |
34 | break; | |
35 | default: | |
36 | continue; | |
37 | } | |
38 | break; | |
39 | } | |
40 | argc --; | |
41 | argv++; | |
42 | } | |
43 | if(argc<=1) | |
44 | return; | |
45 | if(argc==2) { | |
46 | fold++; | |
47 | dict++; | |
48 | } else | |
49 | filenam = argv[2]; | |
50 | dfile = fopen(filenam,"r"); | |
51 | if(dfile==NULL) { | |
52 | fprintf(stderr,"look: can't open %s\n",filenam); | |
53 | exit(2); | |
54 | } | |
55 | canon(argv[1],key); | |
56 | bot = 0; | |
57 | fseek(dfile,0L,2); | |
58 | top = ftell(dfile); | |
59 | for(;;) { | |
60 | mid = (top+bot)/2; | |
61 | fseek(dfile,mid,0); | |
62 | do { | |
63 | c = getc(dfile); | |
64 | mid++; | |
65 | } while(c!=EOF && c!='\n'); | |
66 | if(!getword(entry)) | |
67 | break; | |
68 | canon(entry,word); | |
69 | switch(compare(key,word)) { | |
70 | case -2: | |
71 | case -1: | |
72 | case 0: | |
73 | if(top<=mid) | |
74 | break; | |
75 | top = mid; | |
76 | continue; | |
77 | case 1: | |
78 | case 2: | |
79 | bot = mid; | |
80 | continue; | |
81 | } | |
82 | break; | |
83 | } | |
84 | fseek(dfile,bot,0); | |
85 | while(ftell(dfile)<top) { | |
86 | if(!getword(entry)) | |
87 | return; | |
88 | canon(entry,word); | |
89 | switch(compare(key,word)) { | |
90 | case -2: | |
91 | return; | |
92 | case -1: | |
93 | case 0: | |
94 | puts(entry,stdout); | |
95 | break; | |
96 | case 1: | |
97 | case 2: | |
98 | continue; | |
99 | } | |
100 | break; | |
101 | } | |
102 | while(getword(entry)) { | |
103 | canon(entry,word); | |
104 | switch(compare(key,word)) { | |
105 | case -1: | |
106 | case 0: | |
107 | puts(entry,stdout); | |
108 | continue; | |
109 | } | |
110 | break; | |
111 | } | |
112 | } | |
113 | ||
114 | compare(s,t) | |
115 | register char *s,*t; | |
116 | { | |
117 | for(;*s==*t;s++,t++) | |
118 | if(*s==0) | |
119 | return(0); | |
120 | return(*s==0? -1: | |
121 | *t==0? 1: | |
122 | *s<*t? -2: | |
123 | 2); | |
124 | } | |
125 | ||
126 | getword(w) | |
127 | char *w; | |
128 | { | |
129 | register c; | |
130 | for(;;) { | |
131 | c = getc(dfile); | |
132 | if(c==EOF) | |
133 | return(0); | |
134 | if(c=='\n') | |
135 | break; | |
136 | *w++ = c; | |
137 | } | |
138 | *w = 0; | |
139 | return(1); | |
140 | } | |
141 | ||
142 | canon(old,new) | |
143 | char *old,*new; | |
144 | { | |
145 | register c; | |
146 | for(;;) { | |
147 | *new = c = *old++; | |
148 | if(c==0||c==tab) { | |
149 | *new = 0; | |
150 | break; | |
151 | } | |
152 | if(dict) { | |
153 | if(!isalnum(c)) | |
154 | continue; | |
155 | } | |
156 | if(fold) { | |
157 | if(isupper(c)) | |
158 | *new += 'a' - 'A'; | |
159 | } | |
160 | new++; | |
161 | } | |
162 | } |