comp_lib.c revision 296465 
1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#include <openssl/objects.h>
5#include <openssl/comp.h>
6
7COMP_CTX *COMP_CTX_new(COMP_METHOD *meth)
8{
9    COMP_CTX *ret;
10
11    if ((ret = (COMP_CTX *)OPENSSL_malloc(sizeof(COMP_CTX))) == NULL) {
12        /* ZZZZZZZZZZZZZZZZ */
13        return (NULL);
14    }
15    memset(ret, 0, sizeof(COMP_CTX));
16    ret->meth = meth;
17    if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
18        OPENSSL_free(ret);
19        ret = NULL;
20    }
21    return (ret);
22}
23
24void COMP_CTX_free(COMP_CTX *ctx)
25{
26    if (ctx == NULL)
27        return;
28
29    if (ctx->meth->finish != NULL)
30        ctx->meth->finish(ctx);
31
32    OPENSSL_free(ctx);
33}
34
35int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
36                        unsigned char *in, int ilen)
37{
38    int ret;
39    if (ctx->meth->compress == NULL) {
40        /* ZZZZZZZZZZZZZZZZZ */
41        return (-1);
42    }
43    ret = ctx->meth->compress(ctx, out, olen, in, ilen);
44    if (ret > 0) {
45        ctx->compress_in += ilen;
46        ctx->compress_out += ret;
47    }
48    return (ret);
49}
50
51int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
52                      unsigned char *in, int ilen)
53{
54    int ret;
55
56    if (ctx->meth->expand == NULL) {
57        /* ZZZZZZZZZZZZZZZZZ */
58        return (-1);
59    }
60    ret = ctx->meth->expand(ctx, out, olen, in, ilen);
61    if (ret > 0) {
62        ctx->expand_in += ilen;
63        ctx->expand_out += ret;
64    }
65    return (ret);
66}
67