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-rw-r--r--src/util/map.c39
-rw-r--r--src/util/map.h10
2 files changed, 49 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);
+}
diff --git a/src/util/map.h b/src/util/map.h
new file mode 100644
index 0000000..232720f
--- /dev/null
+++ b/src/util/map.h
@@ -0,0 +1,10 @@
+#include <sys/stat.h>
+
+struct map {
+ char *addr;
+ struct stat sb;
+ int fd;
+};
+
+struct map *open_map(const char *fname);
+void close_map(struct map *m);