diff options
| -rw-r--r-- | pttbbs/common/sys/record.c | 26 | ||||
| -rw-r--r-- | pttbbs/include/cmsys.h | 3 |
2 files changed, 29 insertions, 0 deletions
diff --git a/pttbbs/common/sys/record.c b/pttbbs/common/sys/record.c index df78f699..7d908676 100644 --- a/pttbbs/common/sys/record.c +++ b/pttbbs/common/sys/record.c @@ -1,6 +1,8 @@ /* $Id$ */ #include <sys/stat.h> +#include <sys/mman.h> +#include <string.h> #include <unistd.h> #include <fcntl.h> #include <assert.h> @@ -307,3 +309,27 @@ apply_record(const char *fpath, int (*fptr) (void *item, void *optarg), return 0; } + +int bsearch_record(const char *fpath, const void *key, + int (*compar)(const void *item1, const void *item2), + size_t size, void *buffer) +{ + int fd; + size_t sz = dashs(fpath); + void *addr = NULL, *found; + + if((fd = open(fpath, O_RDONLY, 0)) < 0) + return -1; + addr = mmap(NULL, sz, PROT_READ, MAP_SHARED, fd, 0); + if (!addr) { + close(fd); + return -1; + } + found = bsearch(key, addr, sz / size, size, compar); + if (buffer && found) + memcpy(buffer, found, size); + + munmap(addr, sz); + close(fd); + return found ? (found - addr) / size : -1; +} diff --git a/pttbbs/include/cmsys.h b/pttbbs/include/cmsys.h index b9082763..82936638 100644 --- a/pttbbs/include/cmsys.h +++ b/pttbbs/include/cmsys.h @@ -175,6 +175,9 @@ int substitute_record2(const char *fpath, record_callback_t cb_can_substitue); int delete_record2(const char *fpath, const void *rptr, size_t size, int id, record_callback_t cb_can_substitue); +int bsearch_record(const char *fpath, const void *key, + int (*compar)(const void *item1, const void *item2), + size_t size, void *buffer); /* vector.c */ struct Vector { |