| | varnish-cache/lib/libvarnish/vte.c |
0 |
|
/*- |
1 |
|
* Copyright (c) 2019 Varnish Software AS |
2 |
|
* All rights reserved. |
3 |
|
* |
4 |
|
* Author: Poul-Henning Kamp <phk@phk.freebsd.dk> |
5 |
|
* Author: Dridi Boukelmoune <dridi.boukelmoune@gmail.com> |
6 |
|
* |
7 |
|
* SPDX-License-Identifier: BSD-2-Clause |
8 |
|
* |
9 |
|
* Redistribution and use in source and binary forms, with or without |
10 |
|
* modification, are permitted provided that the following conditions |
11 |
|
* are met: |
12 |
|
* 1. Redistributions of source code must retain the above copyright |
13 |
|
* notice, this list of conditions and the following disclaimer. |
14 |
|
* 2. Redistributions in binary form must reproduce the above copyright |
15 |
|
* notice, this list of conditions and the following disclaimer in the |
16 |
|
* documentation and/or other materials provided with the distribution. |
17 |
|
* |
18 |
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
19 |
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
20 |
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
21 |
|
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
22 |
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
23 |
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
24 |
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
25 |
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
26 |
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
27 |
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
28 |
|
* SUCH DAMAGE. |
29 |
|
* |
30 |
|
*/ |
31 |
|
|
32 |
|
#include "config.h" |
33 |
|
|
34 |
|
#include <errno.h> |
35 |
|
#include <limits.h> |
36 |
|
#include <stdarg.h> |
37 |
|
#include <stdlib.h> |
38 |
|
#include <string.h> |
39 |
|
#include <sys/types.h> /* for MUSL (ssize_t) */ |
40 |
|
|
41 |
|
#include "vdef.h" |
42 |
|
#include "miniobj.h" |
43 |
|
|
44 |
|
#include "vas.h" |
45 |
|
#include "vsb.h" |
46 |
|
#include "vte.h" |
47 |
|
|
48 |
|
#define MINSEP 1 |
49 |
|
#define MAXSEP 3 |
50 |
|
|
51 |
|
struct vte { |
52 |
|
unsigned magic; |
53 |
|
#define VTE_MAGIC 0xedf42b97 |
54 |
|
struct vsb *vsb; |
55 |
|
int c_off; /* input char offset */ |
56 |
|
int l_sz; /* input line size */ |
57 |
|
int l_maxsz; /* maximum input line size */ |
58 |
|
int o_sz; /* output sz */ |
59 |
|
int o_sep; /* output field separators */ |
60 |
|
int f_off; /* input field offset */ |
61 |
|
int f_sz; /* input field size */ |
62 |
|
int f_cnt; /* actual number of fields */ |
63 |
|
int f_maxcnt; /* maximum number of fields */ |
64 |
|
int f_maxsz[] |
65 |
|
v_counted_by_(f_maxcnt); /* maximum size per field */ |
66 |
|
}; |
67 |
|
|
68 |
|
struct vte * |
69 |
39720 |
VTE_new(int maxfields, int width) |
70 |
|
{ |
71 |
|
struct vte *vte; |
72 |
|
|
73 |
39720 |
assert(maxfields > 0); |
74 |
39720 |
assert(width > 0); |
75 |
|
|
76 |
39720 |
ALLOC_FLEX_OBJ(vte, f_maxsz, maxfields, VTE_MAGIC); |
77 |
39720 |
if (vte != NULL) { |
78 |
39720 |
vte->o_sz = width; |
79 |
39720 |
vte->f_maxcnt = maxfields; |
80 |
39720 |
vte->vsb = VSB_new_auto(); |
81 |
39720 |
AN(vte->vsb); |
82 |
39720 |
} |
83 |
39720 |
return (vte); |
84 |
|
} |
85 |
|
|
86 |
|
void |
87 |
39720 |
VTE_destroy(struct vte **vtep) |
88 |
|
{ |
89 |
|
struct vte *vte; |
90 |
|
|
91 |
39720 |
TAKE_OBJ_NOTNULL(vte, vtep, VTE_MAGIC); |
92 |
39720 |
AN(vte->vsb); |
93 |
39720 |
VSB_destroy(&vte->vsb); |
94 |
39720 |
FREE_OBJ(vte); |
95 |
39720 |
} |
96 |
|
|
97 |
|
static int |
98 |
254524 |
vte_update(struct vte *vte) |
99 |
|
{ |
100 |
|
const char *p, *q; |
101 |
|
int len, fno; |
102 |
|
|
103 |
254524 |
AZ(vte->o_sep); |
104 |
|
|
105 |
254524 |
len = VSB_len(vte->vsb); |
106 |
254524 |
assert(len >= vte->c_off); |
107 |
|
|
108 |
254524 |
p = vte->vsb->s_buf + vte->c_off; |
109 |
254524 |
q = vte->vsb->s_buf + len; |
110 |
4995124 |
for (; p < q; p++) { |
111 |
4740600 |
if (vte->f_off < 0) { |
112 |
188960 |
while (p < q && *p != '\n') |
113 |
186080 |
p++; |
114 |
2880 |
} |
115 |
4740600 |
if (vte->l_sz == 0 && *p == ' ') { |
116 |
2880 |
vte->f_off = -1; |
117 |
2880 |
continue; |
118 |
|
} |
119 |
4737720 |
if (vte->f_off >= 0 && vte->f_sz == 0 && *p == '\v') |
120 |
6842 |
p++; |
121 |
4737720 |
if (*p == '\t' || *p == '\n') { |
122 |
480730 |
fno = vte->f_off; |
123 |
480730 |
if (fno >= 0 && vte->f_sz > vte->f_maxsz[fno]) |
124 |
301574 |
vte->f_maxsz[fno] = vte->f_sz; |
125 |
480730 |
fno++; |
126 |
480730 |
assert(fno <= vte->f_maxcnt); |
127 |
480730 |
if (*p == '\t' && fno == vte->f_maxcnt) { |
128 |
0 |
errno = EOVERFLOW; |
129 |
0 |
vte->o_sep = -1; |
130 |
0 |
return (-1); |
131 |
|
} |
132 |
480730 |
vte->f_off = fno; |
133 |
480730 |
vte->f_sz = 0; |
134 |
480730 |
} |
135 |
4737720 |
if (*p == '\n') { |
136 |
99122 |
vte->f_cnt = vmax(vte->f_cnt, vte->f_off); |
137 |
99122 |
vte->l_maxsz = vmax(vte->l_maxsz, vte->l_sz); |
138 |
99122 |
vte->f_off = 0; |
139 |
99122 |
vte->f_sz = 0; |
140 |
99122 |
vte->l_sz = 0; |
141 |
4737720 |
} else if (*p != '\t') { |
142 |
4256990 |
vte->f_sz++; |
143 |
4256990 |
vte->l_sz++; |
144 |
4256990 |
} |
145 |
4737720 |
} |
146 |
|
|
147 |
254524 |
vte->c_off = len; |
148 |
254524 |
return (0); |
149 |
254524 |
} |
150 |
|
|
151 |
|
int |
152 |
0 |
VTE_putc(struct vte *vte, char c) |
153 |
|
{ |
154 |
|
|
155 |
0 |
CHECK_OBJ_NOTNULL(vte, VTE_MAGIC); |
156 |
0 |
AN(c); |
157 |
|
|
158 |
0 |
if (vte->o_sep != 0) |
159 |
0 |
return (-1); |
160 |
|
|
161 |
0 |
if (VSB_putc(vte->vsb, c) < 0) { |
162 |
0 |
vte->o_sep = -1; |
163 |
0 |
return (-1); |
164 |
|
} |
165 |
|
|
166 |
0 |
return (vte_update(vte)); |
167 |
0 |
} |
168 |
|
|
169 |
|
int |
170 |
107082 |
VTE_cat(struct vte *vte, const char *s) |
171 |
|
{ |
172 |
|
|
173 |
107082 |
CHECK_OBJ_NOTNULL(vte, VTE_MAGIC); |
174 |
107082 |
AN(s); |
175 |
|
|
176 |
107082 |
if (vte->o_sep != 0) |
177 |
0 |
return (-1); |
178 |
|
|
179 |
107082 |
if (VSB_cat(vte->vsb, s) < 0) { |
180 |
0 |
vte->o_sep = -1; |
181 |
0 |
return (-1); |
182 |
|
} |
183 |
|
|
184 |
107082 |
return (vte_update(vte)); |
185 |
107082 |
} |
186 |
|
|
187 |
|
int |
188 |
147442 |
VTE_printf(struct vte *vte, const char *fmt, ...) |
189 |
|
{ |
190 |
|
va_list ap; |
191 |
|
int res; |
192 |
|
|
193 |
147442 |
CHECK_OBJ_NOTNULL(vte, VTE_MAGIC); |
194 |
147442 |
AN(fmt); |
195 |
|
|
196 |
147442 |
if (vte->o_sep != 0) |
197 |
0 |
return (-1); |
198 |
|
|
199 |
147442 |
va_start(ap, fmt); |
200 |
147442 |
res = VSB_vprintf(vte->vsb, fmt, ap); |
201 |
147442 |
va_end(ap); |
202 |
|
|
203 |
147442 |
if (res < 0) { |
204 |
0 |
vte->o_sep = -1; |
205 |
0 |
return (-1); |
206 |
|
} |
207 |
|
|
208 |
147442 |
return (vte_update(vte)); |
209 |
147442 |
} |
210 |
|
|
211 |
|
int |
212 |
39720 |
VTE_finish(struct vte *vte) |
213 |
|
{ |
214 |
|
int sep; |
215 |
|
|
216 |
39720 |
CHECK_OBJ_NOTNULL(vte, VTE_MAGIC); |
217 |
|
|
218 |
39720 |
if (vte->o_sep != 0) |
219 |
0 |
return (-1); |
220 |
|
|
221 |
39720 |
if (VSB_finish(vte->vsb) < 0) { |
222 |
0 |
vte->o_sep = -1; |
223 |
0 |
return (-1); |
224 |
|
} |
225 |
|
|
226 |
39720 |
if (vte->f_cnt == 0) { |
227 |
80 |
vte->o_sep = INT_MAX; |
228 |
80 |
return (0); |
229 |
|
} |
230 |
|
|
231 |
39640 |
sep = (vte->o_sz - vte->l_maxsz) / vte->f_cnt; |
232 |
39640 |
vte->o_sep = vlimit_t(int, sep, MINSEP, MAXSEP); |
233 |
39640 |
return (0); |
234 |
39720 |
} |
235 |
|
|
236 |
|
#define VTE_FORMAT(func, priv, ...) \ |
237 |
|
do { \ |
238 |
|
if (func(priv, __VA_ARGS__) < 0) \ |
239 |
|
return (-1); \ |
240 |
|
} while (0) |
241 |
|
|
242 |
|
int |
243 |
0 |
VTE_dump(const struct vte *vte, VTE_format_f *func, void *priv) |
244 |
|
{ |
245 |
|
const char *p; |
246 |
|
|
247 |
0 |
CHECK_OBJ_NOTNULL(vte, VTE_MAGIC); |
248 |
0 |
AN(func); |
249 |
|
|
250 |
0 |
if (vte->o_sep <= 0) |
251 |
0 |
return (-1); |
252 |
|
|
253 |
0 |
p = VSB_data(vte->vsb); |
254 |
0 |
AN(p); |
255 |
0 |
VTE_FORMAT(func, priv, "%s", p); |
256 |
0 |
return (0); |
257 |
0 |
} |
258 |
|
|
259 |
|
int |
260 |
39720 |
VTE_format(const struct vte *vte, VTE_format_f *func, void *priv) |
261 |
|
{ |
262 |
|
int fno, fsz, nsp, just_left; |
263 |
|
const char *p, *q, *sep; |
264 |
|
|
265 |
39720 |
CHECK_OBJ_NOTNULL(vte, VTE_MAGIC); |
266 |
39720 |
AN(func); |
267 |
|
|
268 |
39720 |
if (vte->o_sep <= 0) |
269 |
0 |
return (-1); |
270 |
|
|
271 |
39720 |
nsp = vte->o_sep; |
272 |
39720 |
p = VSB_data(vte->vsb); |
273 |
39720 |
AN(p); |
274 |
39720 |
q = p; |
275 |
|
|
276 |
39720 |
fno = 0; |
277 |
39720 |
sep = ""; |
278 |
39720 |
just_left = 0; |
279 |
520490 |
while (*p != 0) { |
280 |
480770 |
if (*p == '\v') { |
281 |
6842 |
if (p > q) { |
282 |
40 |
VTE_FORMAT(func, priv, "%.*s%s", |
283 |
|
(int)((p - 1) - q), q, sep); |
284 |
40 |
} |
285 |
6842 |
q = ++p; |
286 |
6842 |
just_left = 1; |
287 |
6842 |
} |
288 |
480770 |
if (!just_left && fno == 0 && *p == ' ') |
289 |
2880 |
fsz = strcspn(p, "\n"); |
290 |
|
else |
291 |
477890 |
fsz = strcspn(p, "\t\n"); |
292 |
480770 |
p += fsz; |
293 |
480770 |
if (*p == '\t') { |
294 |
381608 |
assert(vte->f_maxsz[fno] + nsp > fsz); |
295 |
381608 |
if (just_left) { |
296 |
6842 |
VTE_FORMAT(func, priv, "%*s%.*s%*s", |
297 |
|
vte->f_maxsz[fno] - fsz, "", |
298 |
|
(int)(p - q), q, |
299 |
|
nsp, ""); |
300 |
6842 |
just_left = 0; |
301 |
6842 |
} else { |
302 |
374766 |
VTE_FORMAT(func, priv, "%.*s%*s", |
303 |
|
(int)(p - q), q, |
304 |
|
vte->f_maxsz[fno] + nsp - fsz, ""); |
305 |
|
} |
306 |
381608 |
fno++; |
307 |
381608 |
q = ++p; |
308 |
381608 |
sep = ""; |
309 |
480770 |
} else if (*p == '\n') { |
310 |
99122 |
fno = 0; |
311 |
99122 |
p++; |
312 |
99122 |
sep = "\n"; |
313 |
99122 |
} |
314 |
|
} |
315 |
|
|
316 |
39720 |
if (q < p) |
317 |
39640 |
VTE_FORMAT(func, priv, "%s", q); |
318 |
39720 |
return (0); |
319 |
39720 |
} |
320 |
|
|
321 |
|
#ifdef TEST_DRIVER |
322 |
|
|
323 |
|
#include <stdio.h> |
324 |
|
|
325 |
|
static const char *test_vte = |
326 |
|
"name\tref\tcomment\n" |
327 |
|
"foo\t\v1\tthe foo\n" |
328 |
|
"bar\t\v10\tthe bars\n" |
329 |
|
"baz\t\v0\t\n" |
330 |
|
"\v0\t\v0\t\n" |
331 |
|
"qux\t\v-1\tno eol"; |
332 |
|
|
333 |
|
static const char *test_fmt = |
334 |
|
"name ref comment\n" |
335 |
|
"foo 1 the foo\n" |
336 |
|
"bar 10 the bars\n" |
337 |
|
"baz 0 \n" |
338 |
|
" 0 0 \n" |
339 |
|
"qux -1 no eol"; |
340 |
|
|
341 |
|
static int |
342 |
560 |
test_vsb_format(void *priv, const char *fmt, ...) |
343 |
|
{ |
344 |
|
struct vsb *vsb; |
345 |
|
va_list ap; |
346 |
|
int res; |
347 |
|
|
348 |
560 |
CAST_OBJ_NOTNULL(vsb, priv, VSB_MAGIC); |
349 |
560 |
AN(fmt); |
350 |
|
|
351 |
560 |
va_start(ap, fmt); |
352 |
560 |
res = VSB_vprintf(vsb, fmt, ap); |
353 |
560 |
va_end(ap); |
354 |
|
|
355 |
560 |
return (res); |
356 |
|
} |
357 |
|
|
358 |
|
int |
359 |
40 |
main(int argc, char **argv) |
360 |
|
{ |
361 |
|
struct vte *vte; |
362 |
|
struct vsb *vsb; |
363 |
40 |
int err = 0; |
364 |
|
|
365 |
40 |
(void)argc; |
366 |
40 |
(void)argv; |
367 |
|
|
368 |
40 |
vte = VTE_new(3, 20); |
369 |
40 |
AN(vte); |
370 |
40 |
AZ(VTE_cat(vte, test_vte)); |
371 |
40 |
AZ(VTE_finish(vte)); |
372 |
|
|
373 |
40 |
vsb = VSB_new_auto(); |
374 |
40 |
AN(vsb); |
375 |
40 |
AZ(VTE_format(vte, test_vsb_format, vsb)); |
376 |
40 |
AZ(VSB_finish(vsb)); |
377 |
|
|
378 |
40 |
assert(vte->o_sep == 2); |
379 |
40 |
assert(vte->f_maxsz[0] == 4); |
380 |
40 |
assert(vte->f_maxsz[1] == 3); |
381 |
40 |
assert(vte->f_maxsz[2] == 8); |
382 |
|
|
383 |
40 |
if (strcmp(VSB_data(vsb), test_fmt)) { |
384 |
0 |
fprintf(stderr, |
385 |
|
"Error: VTE output mismatch\n" |
386 |
|
"<<<<<<<\n" |
387 |
|
"%s\n" |
388 |
|
"=======\n" |
389 |
|
"%s\n" |
390 |
|
">>>>>>>\n" |
391 |
|
"FAIL\n", |
392 |
0 |
VSB_data(vsb), test_fmt); |
393 |
0 |
err = 1; |
394 |
0 |
} |
395 |
|
|
396 |
40 |
VSB_destroy(&vsb); |
397 |
40 |
VTE_destroy(&vte); |
398 |
40 |
if (!err) |
399 |
40 |
printf("PASS\n"); |
400 |
40 |
return (err); |
401 |
|
} |
402 |
|
|
403 |
|
#endif |