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f42904bc DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
7 | #ifndef lint | |
8 | char copyright[] = | |
9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ | |
10 | All rights reserved.\n"; | |
11 | #endif not lint | |
12 | ||
13 | #ifndef lint | |
93b63814 | 14 | static char sccsid[] = "@(#)wc.c 5.2 (Berkeley) %G%"; |
f42904bc DF |
15 | #endif not lint |
16 | ||
93b63814 | 17 | /* wc line, word and char count */ |
66690d0f | 18 | |
93b63814 KB |
19 | #include <sys/param.h> |
20 | #include <sys/stat.h> | |
21 | #include <sys/file.h> | |
66690d0f | 22 | #include <stdio.h> |
66690d0f | 23 | |
93b63814 KB |
24 | #define DEL 0177 /* del char */ |
25 | #define ERR 1 /* error exit */ | |
26 | #define NL 012 /* newline char */ | |
27 | #define NO 0 /* no/false */ | |
28 | #define OK 0 /* okay exit */ | |
29 | #define SPACE 040 /* space char */ | |
30 | #define TAB 011 /* tab char */ | |
31 | #define YES 1 /* yes/true */ | |
32 | ||
33 | static long tlinect, /* total line count */ | |
34 | twordct, /* total word count */ | |
35 | tcharct; /* total character count */ | |
36 | static short doline, /* if want line count */ | |
37 | doword, /* if want word count */ | |
38 | dochar; /* if want character count */ | |
39 | ||
40 | main(argc,argv) | |
41 | int argc; | |
42 | char **argv; | |
66690d0f | 43 | { |
93b63814 KB |
44 | extern char *optarg; /* getopt arguments */ |
45 | extern int optind; | |
46 | register int ch; /* getopt character */ | |
66690d0f | 47 | |
93b63814 KB |
48 | /* |
49 | * wc is unusual in that its flags are on by default, so, | |
50 | * if you don't get any arguments, you have to turn them | |
51 | * all on. | |
52 | */ | |
53 | if (argc > 1 && argv[1][0] == '-' && argv[1][1]) { | |
54 | while ((ch = getopt(argc,argv,"lwc")) != EOF) | |
55 | switch((char)ch) { | |
56 | case 'l': | |
57 | doline = YES; | |
58 | break; | |
59 | case 'w': | |
60 | doword = YES; | |
61 | break; | |
62 | case 'c': | |
63 | dochar = YES; | |
64 | break; | |
65 | case '?': | |
66 | default: | |
67 | fputs("Usage: wc [-lwc] [files]\n",stderr); | |
68 | exit(ERR); | |
69 | } | |
70 | argv += optind; | |
71 | argc -= optind; | |
72 | } | |
73 | else { | |
74 | ++argv; | |
75 | --argc; | |
76 | doline = doword = dochar = YES; | |
77 | } | |
78 | ||
79 | /* should print "stdin" as the file name, here */ | |
80 | if (argc <= 1) { | |
81 | if (!*argv || !strcmp(*argv,"-")) { | |
82 | cnt((char *)NULL); | |
83 | putchar('\n'); | |
84 | } | |
85 | else { | |
86 | cnt(*argv); | |
87 | printf(" %s\n",*argv); | |
66690d0f | 88 | } |
93b63814 | 89 | exit(OK); |
66690d0f BJ |
90 | } |
91 | ||
93b63814 KB |
92 | /* |
93 | * cat allows "-" as stdin anywhere in the arg list, | |
94 | * might as well here, too. Again, should use "stdin" | |
95 | * as the file name. | |
96 | */ | |
66690d0f | 97 | do { |
93b63814 KB |
98 | if (!strcmp(*argv,"-")) { |
99 | cnt((char *)NULL); | |
100 | putchar('\n'); | |
66690d0f | 101 | } |
93b63814 KB |
102 | else { |
103 | cnt(*argv); | |
104 | printf(" %s\n",*argv); | |
105 | } | |
106 | } while(*++argv); | |
107 | ||
108 | if (doline) | |
109 | printf(" %7ld",tlinect); | |
110 | if (doword) | |
111 | printf(" %7ld",twordct); | |
112 | if (dochar) | |
113 | printf(" %7ld",tcharct); | |
114 | puts(" total"); | |
115 | exit(OK); | |
116 | } | |
117 | ||
118 | static | |
119 | cnt(file) | |
120 | char *file; | |
121 | { | |
122 | register u_char *C; /* traveling pointer */ | |
123 | register short gotsp; /* space toggle */ | |
124 | register int len; /* length of read */ | |
125 | register long linect, /* line count */ | |
126 | wordct, /* word count */ | |
127 | charct; /* character count */ | |
128 | struct stat sbuf; /* stat buffer */ | |
129 | int fd; /* file descriptor */ | |
130 | u_char buf[MAXBSIZE]; /* read buffer */ | |
131 | ||
132 | linect = wordct = charct = 0; | |
133 | if (file) { | |
134 | if ((fd = open(file,O_RDONLY)) < 0) { | |
135 | perror(file); | |
136 | exit(ERR); | |
137 | } | |
138 | if (!doword) { | |
139 | /* | |
140 | * line counting is split out because it's a lot | |
141 | * faster to get lines than to get words, since | |
142 | * the word count requires some logic. | |
143 | */ | |
144 | if (doline) { | |
145 | while(len = read(fd,buf,MAXBSIZE)) { | |
146 | if (len == -1) { | |
147 | perror(file); | |
148 | exit(ERR); | |
149 | } | |
150 | charct += len; | |
151 | for (C = buf;len--;++C) | |
152 | if (*C == '\n') | |
153 | ++linect; | |
154 | } | |
155 | tlinect += linect; | |
156 | printf(" %7ld",linect); | |
157 | if (dochar) { | |
158 | tcharct += charct; | |
159 | printf(" %7ld",sbuf.st_size); | |
66690d0f | 160 | } |
93b63814 KB |
161 | close(fd); |
162 | return; | |
66690d0f | 163 | } |
93b63814 KB |
164 | /* |
165 | * if all we need is the number of characters and | |
166 | * it's a directory or a regular or linked file, just | |
167 | * stat the puppy. We avoid testing for it not being | |
168 | * a special device in case someone adds a new type | |
169 | * of inode. | |
170 | */ | |
171 | if (dochar) { | |
172 | if (fstat(fd,&sbuf)) { | |
173 | perror(file); | |
174 | exit(ERR); | |
175 | } | |
176 | if (sbuf.st_mode & (S_IFREG | S_IFLNK | S_IFDIR)) { | |
177 | printf(" %7ld",sbuf.st_size); | |
178 | tcharct += sbuf.st_size; | |
179 | close(fd); | |
180 | return; | |
181 | } | |
66690d0f | 182 | } |
66690d0f | 183 | } |
93b63814 KB |
184 | } |
185 | else | |
186 | fd = 0; | |
187 | /* do it the hard way... */ | |
188 | for (gotsp = YES;len = read(fd,buf,MAXBSIZE);) { | |
189 | if (len == -1) { | |
190 | perror(file); | |
191 | exit(ERR); | |
192 | } | |
193 | charct += len; | |
194 | for (C = buf;len--;++C) | |
195 | switch(*C) { | |
196 | case NL: | |
197 | ++linect; | |
198 | case TAB: | |
199 | case SPACE: | |
200 | gotsp = YES; | |
201 | continue; | |
202 | default: | |
203 | #ifdef NOT_DEFINED | |
204 | /* | |
205 | * This line of code implements the | |
206 | * original V7 wc algorithm, i.e. | |
207 | * a non-printing character doesn't | |
208 | * toggle the "word" count, so that | |
209 | * " ^D^F " counts as 6 spaces, | |
210 | * while "foo^D^Fbar" counts as 8 | |
211 | * characters. | |
212 | * | |
213 | * test order is important -- gotsp | |
214 | * will normally be NO, so test it | |
215 | * first | |
216 | */ | |
217 | if (gotsp && *C > SPACE && *C < DEL) { | |
218 | #endif NOT_DEFINED | |
219 | /* | |
220 | * This line implements the manual | |
221 | * page, i.e. a word is a "maximal | |
222 | * string of characters delimited by | |
223 | * spaces, tabs or newlines." Notice | |
224 | * nothing was said about a character | |
225 | * being printing or non-printing. | |
226 | */ | |
227 | if (gotsp) { | |
228 | gotsp = NO; | |
229 | ++wordct; | |
230 | } | |
231 | } | |
232 | } | |
233 | if (doline) { | |
66690d0f | 234 | tlinect += linect; |
93b63814 KB |
235 | printf(" %7ld",linect); |
236 | } | |
237 | if (doword) { | |
66690d0f | 238 | twordct += wordct; |
93b63814 | 239 | printf(" %7ld",wordct); |
66690d0f | 240 | } |
93b63814 KB |
241 | if (dochar) { |
242 | tcharct += charct; | |
243 | printf(" %7ld",charct); | |
66690d0f | 244 | } |
93b63814 | 245 | close(fd); |
66690d0f | 246 | } |