diff options
Diffstat (limited to 'src/util/map.c')
-rw-r--r-- | src/util/map.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/util/map.c b/src/util/map.c new file mode 100644 index 0000000..db691d3 --- /dev/null +++ b/src/util/map.c @@ -0,0 +1,39 @@ +#include <fcntl.h> +#include <stdio.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <unistd.h> + +#include "map.h" + +struct map *open_map(const char *fname) { + int fd = open(fname, O_RDONLY); + + struct stat sb; + if (fstat(fd, &sb) == -1) { + fprintf(stderr, "Kon bestand niet lezen\n"); + return NULL; + } + + char *addr = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, fd, 0); + if (addr == MAP_FAILED) { + fprintf(stderr, "Kon bestand niet kaarten\n"); + return NULL; + } + + struct map *res = calloc(1, sizeof(struct map)); + + res->addr = addr; + res->sb = sb; + res->fd = fd; + return res; +} + +void close_map(struct map *m) { + munmap(m->addr, m->sb.st_size); + close(m->fd); + free(m); +} |