Commit | Line | Data |
---|---|---|
5880e327 KB |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
f15db449 | 5 | * %sccs.include.redist.c% |
5880e327 KB |
6 | */ |
7 | ||
8 | #ifndef lint | |
36d3cdfb | 9 | static char sccsid[] = "@(#)display.c 5.11 (Berkeley) %G%"; |
5880e327 KB |
10 | #endif /* not lint */ |
11 | ||
12 | #include <sys/param.h> | |
13 | #include <sys/stat.h> | |
14 | #include <unistd.h> | |
cbd13470 | 15 | #include <errno.h> |
5880e327 KB |
16 | #include <ctype.h> |
17 | #include <stdio.h> | |
36d3cdfb | 18 | #include <stdlib.h> |
38dde0cd | 19 | #include <string.h> |
5880e327 KB |
20 | #include "hexdump.h" |
21 | ||
9f70d485 KB |
22 | enum _vflag vflag = FIRST; |
23 | ||
5880e327 KB |
24 | static off_t address; /* address/offset in stream */ |
25 | static off_t eaddress; /* end address */ | |
26 | static off_t savaddress; /* saved address/offset in stream */ | |
27 | ||
6d23aef6 KB |
28 | #define PRINT { \ |
29 | switch(pr->flags) { \ | |
30 | case F_ADDRESS: \ | |
31 | (void)printf(pr->fmt, address); \ | |
32 | break; \ | |
33 | case F_BPAD: \ | |
34 | (void)printf(pr->fmt, ""); \ | |
35 | break; \ | |
36 | case F_C: \ | |
37 | conv_c(pr, bp); \ | |
38 | break; \ | |
39 | case F_CHAR: \ | |
40 | (void)printf(pr->fmt, *bp); \ | |
41 | break; \ | |
42 | case F_DBL: { \ | |
43 | double dval; \ | |
44 | float fval; \ | |
45 | switch(pr->bcnt) { \ | |
46 | case 4: \ | |
47 | bcopy((char *)bp, (char *)&fval, sizeof(fval)); \ | |
48 | (void)printf(pr->fmt, fval); \ | |
49 | break; \ | |
50 | case 8: \ | |
51 | bcopy((char *)bp, (char *)&dval, sizeof(dval)); \ | |
52 | (void)printf(pr->fmt, dval); \ | |
53 | break; \ | |
54 | } \ | |
55 | break; \ | |
56 | } \ | |
57 | case F_INT: { \ | |
58 | int ival; \ | |
59 | short sval; \ | |
60 | switch(pr->bcnt) { \ | |
61 | case 1: \ | |
62 | (void)printf(pr->fmt, (int)*bp); \ | |
63 | break; \ | |
64 | case 2: \ | |
65 | bcopy((char *)bp, (char *)&sval, sizeof(sval)); \ | |
66 | (void)printf(pr->fmt, (int)sval); \ | |
67 | break; \ | |
68 | case 4: \ | |
69 | bcopy((char *)bp, (char *)&ival, sizeof(ival)); \ | |
70 | (void)printf(pr->fmt, ival); \ | |
71 | break; \ | |
72 | } \ | |
73 | break; \ | |
74 | } \ | |
75 | case F_P: \ | |
76 | (void)printf(pr->fmt, isprint(*bp) ? *bp : '.'); \ | |
77 | break; \ | |
78 | case F_STR: \ | |
79 | (void)printf(pr->fmt, (char *)bp); \ | |
80 | break; \ | |
81 | case F_TEXT: \ | |
82 | (void)printf(pr->fmt); \ | |
83 | break; \ | |
84 | case F_U: \ | |
85 | conv_u(pr, bp); \ | |
86 | break; \ | |
87 | case F_UINT: { \ | |
88 | u_int ival; \ | |
89 | u_short sval; \ | |
90 | switch(pr->bcnt) { \ | |
91 | case 1: \ | |
92 | (void)printf(pr->fmt, (u_int)*bp); \ | |
93 | break; \ | |
94 | case 2: \ | |
95 | bcopy((char *)bp, (char *)&sval, sizeof(sval)); \ | |
96 | (void)printf(pr->fmt, (u_int)sval); \ | |
97 | break; \ | |
98 | case 4: \ | |
99 | bcopy((char *)bp, (char *)&ival, sizeof(ival)); \ | |
100 | (void)printf(pr->fmt, ival); \ | |
101 | break; \ | |
102 | } \ | |
103 | break; \ | |
104 | } \ | |
105 | } \ | |
106 | } | |
107 | ||
5880e327 KB |
108 | display() |
109 | { | |
110 | extern FU *endfu; | |
111 | register FS *fs; | |
112 | register FU *fu; | |
113 | register PR *pr; | |
114 | register int cnt; | |
115 | register u_char *bp; | |
116 | off_t saveaddress; | |
117 | u_char savech, *savebp, *get(); | |
118 | ||
119 | while (bp = get()) | |
120 | for (fs = fshead, savebp = bp, saveaddress = address; fs; | |
6d23aef6 | 121 | fs = fs->nextfs, bp = savebp, address = saveaddress) |
5880e327 KB |
122 | for (fu = fs->nextfu; fu; fu = fu->nextfu) { |
123 | if (fu->flags&F_IGNORE) | |
124 | break; | |
125 | for (cnt = fu->reps; cnt; --cnt) | |
126 | for (pr = fu->nextpr; pr; address += pr->bcnt, | |
127 | bp += pr->bcnt, pr = pr->nextpr) { | |
6a855d7f KB |
128 | if (eaddress && address >= eaddress && |
129 | !(pr->flags&(F_TEXT|F_BPAD))) | |
130 | bpad(pr); | |
5880e327 KB |
131 | if (cnt == 1 && pr->nospace) { |
132 | savech = *pr->nospace; | |
133 | *pr->nospace = '\0'; | |
134 | } | |
6d23aef6 | 135 | PRINT; |
5880e327 KB |
136 | if (cnt == 1 && pr->nospace) |
137 | *pr->nospace = savech; | |
138 | } | |
139 | } | |
5880e327 KB |
140 | if (endfu) { |
141 | /* | |
1d65935d KB |
142 | * if eaddress not set, error or file size was multiple of |
143 | * blocksize, and no partial block ever found. | |
5880e327 | 144 | */ |
1d65935d KB |
145 | if (!eaddress) { |
146 | if (!address) | |
147 | return; | |
840e57c2 | 148 | eaddress = address; |
1d65935d | 149 | } |
5880e327 KB |
150 | for (pr = endfu->nextpr; pr; pr = pr->nextpr) |
151 | switch(pr->flags) { | |
152 | case F_ADDRESS: | |
153 | (void)printf(pr->fmt, eaddress); | |
154 | break; | |
155 | case F_TEXT: | |
156 | (void)printf(pr->fmt); | |
157 | break; | |
158 | } | |
159 | } | |
160 | } | |
161 | ||
6a855d7f KB |
162 | bpad(pr) |
163 | PR *pr; | |
164 | { | |
165 | static char *spec = " -0+#"; | |
166 | register char *p1, *p2; | |
167 | ||
168 | /* | |
169 | * remove all conversion flags; '-' is the only one valid | |
170 | * with %s, and it's not useful here. | |
171 | */ | |
172 | pr->flags = F_BPAD; | |
173 | *pr->cchar = 's'; | |
174 | for (p1 = pr->fmt; *p1 != '%'; ++p1); | |
175 | for (p2 = ++p1; *p1 && index(spec, *p1); ++p1); | |
176 | while (*p2++ = *p1++); | |
177 | } | |
178 | ||
b7ce4028 KB |
179 | static char **_argv; |
180 | ||
5880e327 KB |
181 | u_char * |
182 | get() | |
183 | { | |
184 | extern enum _vflag vflag; | |
185 | extern int length; | |
186 | static int ateof = 1; | |
187 | static u_char *curp, *savp; | |
188 | register int n; | |
189 | int need, nread; | |
190 | u_char *tmpp; | |
191 | ||
192 | if (!curp) { | |
193 | curp = (u_char *)emalloc(blocksize); | |
194 | savp = (u_char *)emalloc(blocksize); | |
195 | } else { | |
196 | tmpp = curp; | |
197 | curp = savp; | |
198 | savp = tmpp; | |
199 | address = savaddress += blocksize; | |
200 | } | |
201 | for (need = blocksize, nread = 0;;) { | |
202 | /* | |
203 | * if read the right number of bytes, or at EOF for one file, | |
204 | * and no other files are available, zero-pad the rest of the | |
205 | * block and set the end flag. | |
206 | */ | |
207 | if (!length || ateof && !next((char **)NULL)) { | |
208 | if (need == blocksize) | |
209 | return((u_char *)NULL); | |
210 | if (vflag != ALL && !bcmp(curp, savp, nread)) { | |
211 | if (vflag != DUP) | |
212 | (void)printf("*\n"); | |
213 | return((u_char *)NULL); | |
214 | } | |
215 | bzero((char *)curp + nread, need); | |
216 | eaddress = address + nread; | |
217 | return(curp); | |
218 | } | |
219 | n = fread((char *)curp + nread, sizeof(u_char), | |
220 | length == -1 ? need : MIN(length, need), stdin); | |
221 | if (!n) { | |
b7ce4028 KB |
222 | if (ferror(stdin)) |
223 | (void)fprintf(stderr, "hexdump: %s: %s\n", | |
224 | _argv[-1], strerror(errno)); | |
5880e327 KB |
225 | ateof = 1; |
226 | continue; | |
227 | } | |
228 | ateof = 0; | |
229 | if (length != -1) | |
230 | length -= n; | |
231 | if (!(need -= n)) { | |
cbd13470 KB |
232 | if (vflag == ALL || vflag == FIRST || |
233 | bcmp(curp, savp, blocksize)) { | |
234 | if (vflag == DUP || vflag == FIRST) | |
5880e327 KB |
235 | vflag = WAIT; |
236 | return(curp); | |
237 | } | |
238 | if (vflag == WAIT) | |
239 | (void)printf("*\n"); | |
240 | vflag = DUP; | |
241 | address = savaddress += blocksize; | |
242 | need = blocksize; | |
243 | nread = 0; | |
244 | } | |
245 | else | |
246 | nread += n; | |
247 | } | |
248 | } | |
249 | ||
250 | extern off_t skip; /* bytes to skip */ | |
251 | ||
252 | next(argv) | |
253 | char **argv; | |
254 | { | |
255 | extern int errno, exitval; | |
256 | static int done; | |
5880e327 KB |
257 | int statok; |
258 | ||
259 | if (argv) { | |
260 | _argv = argv; | |
261 | return(1); | |
262 | } | |
263 | for (;;) { | |
264 | if (*_argv) { | |
265 | if (!(freopen(*_argv, "r", stdin))) { | |
266 | (void)fprintf(stderr, "hexdump: %s: %s\n", | |
267 | *_argv, strerror(errno)); | |
268 | exitval = 1; | |
269 | ++_argv; | |
270 | continue; | |
271 | } | |
272 | statok = done = 1; | |
273 | } else { | |
274 | if (done++) | |
275 | return(0); | |
276 | statok = 0; | |
277 | } | |
278 | if (skip) | |
279 | doskip(statok ? *_argv : "stdin", statok); | |
280 | if (*_argv) | |
281 | ++_argv; | |
282 | if (!skip) | |
283 | return(1); | |
284 | } | |
285 | /* NOTREACHED */ | |
286 | } | |
287 | ||
288 | doskip(fname, statok) | |
289 | char *fname; | |
290 | int statok; | |
291 | { | |
292 | extern int errno; | |
293 | struct stat sbuf; | |
294 | ||
295 | if (statok) { | |
296 | if (fstat(fileno(stdin), &sbuf)) { | |
297 | (void)fprintf(stderr, "hexdump: %s: %s.\n", | |
298 | fname, strerror(errno)); | |
299 | exit(1); | |
300 | } | |
301 | if (skip >= sbuf.st_size) { | |
302 | skip -= sbuf.st_size; | |
303 | address += sbuf.st_size; | |
304 | return; | |
305 | } | |
306 | } | |
307 | if (fseek(stdin, skip, SEEK_SET)) { | |
308 | (void)fprintf(stderr, "hexdump: %s: %s.\n", | |
309 | fname, strerror(errno)); | |
310 | exit(1); | |
311 | } | |
312 | savaddress = address += skip; | |
313 | skip = 0; | |
314 | } | |
315 | ||
316 | char * | |
317 | emalloc(size) | |
318 | int size; | |
319 | { | |
36d3cdfb | 320 | char *p; |
5880e327 KB |
321 | |
322 | if (!(p = malloc((u_int)size))) | |
323 | nomem(); | |
324 | bzero(p, size); | |
325 | return(p); | |
326 | } | |
327 | ||
328 | nomem() | |
329 | { | |
cbd13470 KB |
330 | extern int errno; |
331 | ||
332 | (void)fprintf(stderr, "hexdump: %s.\n", strerror(errno)); | |
5880e327 KB |
333 | exit(1); |
334 | } |