2 2181e0c8 2019-03-19 stsp * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
4 2181e0c8 2019-03-19 stsp * Permission to use, copy, modify, and distribute this software for any
5 2181e0c8 2019-03-19 stsp * purpose with or without fee is hereby granted, provided that the above
6 2181e0c8 2019-03-19 stsp * copyright notice and this permission notice appear in all copies.
8 2181e0c8 2019-03-19 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 2181e0c8 2019-03-19 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 2181e0c8 2019-03-19 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 2181e0c8 2019-03-19 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 2181e0c8 2019-03-19 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 2181e0c8 2019-03-19 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 2181e0c8 2019-03-19 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 2181e0c8 2019-03-19 stsp #include <sys/queue.h>
19 2181e0c8 2019-03-19 stsp #include <errno.h>
20 2181e0c8 2019-03-19 stsp #include <stdio.h>
21 2181e0c8 2019-03-19 stsp #include <stdlib.h>
22 2181e0c8 2019-03-19 stsp #include <string.h>
23 2181e0c8 2019-03-19 stsp #include <sha1.h>
24 2181e0c8 2019-03-19 stsp #include <zlib.h>
25 2181e0c8 2019-03-19 stsp #include <time.h>
27 2181e0c8 2019-03-19 stsp #include "got_error.h"
28 2181e0c8 2019-03-19 stsp #include "got_object.h"
29 324d37e7 2019-05-11 stsp #include "got_path.h"
31 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.h"
34 2181e0c8 2019-03-19 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
37 2181e0c8 2019-03-19 stsp const struct got_error *
38 2181e0c8 2019-03-19 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
40 2181e0c8 2019-03-19 stsp const struct got_error *err = NULL;
43 2181e0c8 2019-03-19 stsp memset(&zb->z, 0, sizeof(zb->z));
45 2181e0c8 2019-03-19 stsp zb->z.zalloc = Z_NULL;
46 2181e0c8 2019-03-19 stsp zb->z.zfree = Z_NULL;
47 2181e0c8 2019-03-19 stsp zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
48 2181e0c8 2019-03-19 stsp if (zerr != Z_OK) {
49 2181e0c8 2019-03-19 stsp if (zerr == Z_ERRNO)
50 638f9024 2019-05-13 stsp return got_error_from_errno("deflateInit");
51 2181e0c8 2019-03-19 stsp if (zerr == Z_MEM_ERROR) {
52 2181e0c8 2019-03-19 stsp errno = ENOMEM;
53 638f9024 2019-05-13 stsp return got_error_from_errno("deflateInit");
55 2181e0c8 2019-03-19 stsp return got_error(GOT_ERR_COMPRESSION);
58 2181e0c8 2019-03-19 stsp zb->inlen = zb->outlen = bufsize;
60 2181e0c8 2019-03-19 stsp zb->inbuf = calloc(1, zb->inlen);
61 2181e0c8 2019-03-19 stsp if (zb->inbuf == NULL) {
62 638f9024 2019-05-13 stsp err = got_error_from_errno("calloc");
66 2181e0c8 2019-03-19 stsp zb->flags = 0;
67 2181e0c8 2019-03-19 stsp if (outbuf == NULL) {
68 2181e0c8 2019-03-19 stsp zb->outbuf = calloc(1, zb->outlen);
69 2181e0c8 2019-03-19 stsp if (zb->outbuf == NULL) {
70 638f9024 2019-05-13 stsp err = got_error_from_errno("calloc");
73 2181e0c8 2019-03-19 stsp zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
75 2181e0c8 2019-03-19 stsp zb->outbuf = outbuf;
79 2181e0c8 2019-03-19 stsp got_deflate_end(zb);
83 2181e0c8 2019-03-19 stsp const struct got_error *
84 2181e0c8 2019-03-19 stsp got_deflate_read(struct got_deflate_buf *zb, FILE *f, size_t *outlenp)
86 2181e0c8 2019-03-19 stsp size_t last_total_out = zb->z.total_out;
87 2181e0c8 2019-03-19 stsp z_stream *z = &zb->z;
88 2181e0c8 2019-03-19 stsp int ret = Z_ERRNO;
90 2181e0c8 2019-03-19 stsp z->next_out = zb->outbuf;
91 2181e0c8 2019-03-19 stsp z->avail_out = zb->outlen;
93 2181e0c8 2019-03-19 stsp *outlenp = 0;
95 2181e0c8 2019-03-19 stsp if (z->avail_in == 0) {
96 2181e0c8 2019-03-19 stsp size_t n = fread(zb->inbuf, 1, zb->inlen, f);
97 2181e0c8 2019-03-19 stsp if (n == 0) {
98 2181e0c8 2019-03-19 stsp if (ferror(f))
99 2181e0c8 2019-03-19 stsp return got_ferror(f, GOT_ERR_IO);
101 4e4a7005 2019-04-13 stsp ret = deflate(z, Z_FINISH);
104 2181e0c8 2019-03-19 stsp z->next_in = zb->inbuf;
105 2181e0c8 2019-03-19 stsp z->avail_in = n;
107 2181e0c8 2019-03-19 stsp ret = deflate(z, Z_NO_FLUSH);
108 2181e0c8 2019-03-19 stsp } while (ret == Z_OK && z->avail_out > 0);
110 2181e0c8 2019-03-19 stsp if (ret == Z_OK) {
111 2181e0c8 2019-03-19 stsp zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
113 2181e0c8 2019-03-19 stsp if (ret != Z_STREAM_END)
114 2181e0c8 2019-03-19 stsp return got_error(GOT_ERR_COMPRESSION);
115 2181e0c8 2019-03-19 stsp zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
118 2181e0c8 2019-03-19 stsp *outlenp = z->total_out - last_total_out;
119 2181e0c8 2019-03-19 stsp return NULL;
123 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
125 2181e0c8 2019-03-19 stsp free(zb->inbuf);
126 2181e0c8 2019-03-19 stsp if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
127 2181e0c8 2019-03-19 stsp free(zb->outbuf);
128 2181e0c8 2019-03-19 stsp deflateEnd(&zb->z);
131 2181e0c8 2019-03-19 stsp const struct got_error *
132 2181e0c8 2019-03-19 stsp got_deflate_to_file(size_t *outlen, FILE *infile, FILE *outfile)
134 2181e0c8 2019-03-19 stsp const struct got_error *err;
135 2181e0c8 2019-03-19 stsp size_t avail;
136 2181e0c8 2019-03-19 stsp struct got_deflate_buf zb;
138 2181e0c8 2019-03-19 stsp err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
142 2181e0c8 2019-03-19 stsp *outlen = 0;
145 2181e0c8 2019-03-19 stsp err = got_deflate_read(&zb, infile, &avail);
148 2181e0c8 2019-03-19 stsp if (avail > 0) {
150 2181e0c8 2019-03-19 stsp n = fwrite(zb.outbuf, avail, 1, outfile);
151 2181e0c8 2019-03-19 stsp if (n != 1) {
152 2181e0c8 2019-03-19 stsp err = got_ferror(outfile, GOT_ERR_IO);
155 2181e0c8 2019-03-19 stsp *outlen += avail;
157 2181e0c8 2019-03-19 stsp } while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
160 2181e0c8 2019-03-19 stsp if (err == NULL)
161 2181e0c8 2019-03-19 stsp rewind(outfile);
162 2181e0c8 2019-03-19 stsp got_deflate_end(&zb);
163 2181e0c8 2019-03-19 stsp return err;
