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34 #include "krb5_locl.h"
35 #include "store-int.h"
37 RCSID("$Id: store_emem.c,v 1.12.4.1 2002/10/21 16:08:55 joda Exp $");
39 typedef struct emem_storage{
47 emem_fetch(krb5_storage *sp, void *data, size_t size)
49 emem_storage *s = (emem_storage*)sp->data;
50 if(s->base + s->len - s->ptr < size)
51 size = s->base + s->len - s->ptr;
52 memmove(data, s->ptr, size);
53 sp->seek(sp, size, SEEK_CUR);
58 emem_store(krb5_storage *sp, const void *data, size_t size)
60 emem_storage *s = (emem_storage*)sp->data;
61 if(size > s->base + s->size - s->ptr){
64 off = s->ptr - s->base;
68 base = realloc(s->base, sz);
73 s->ptr = (unsigned char*)base + off;
75 memmove(s->ptr, data, size);
76 sp->seek(sp, size, SEEK_CUR);
81 emem_seek(krb5_storage *sp, off_t offset, int whence)
83 emem_storage *s = (emem_storage*)sp->data;
90 s->ptr = s->base + offset;
95 sp->seek(sp,s->ptr - s->base + offset, SEEK_SET);
98 sp->seek(sp, s->len + offset, SEEK_SET);
104 return s->ptr - s->base;
108 emem_free(krb5_storage *sp)
110 emem_storage *s = sp->data;
111 memset(s->base, 0, s->len);
116 krb5_storage_emem(void)
118 krb5_storage *sp = malloc(sizeof(krb5_storage));
119 emem_storage *s = malloc(sizeof(*s));
122 sp->eof_code = HEIM_ERR_EOF;
124 s->base = malloc(s->size);
127 sp->fetch = emem_fetch;
128 sp->store = emem_store;
129 sp->seek = emem_seek;
130 sp->free = emem_free;