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Diffstat (limited to 'app/tools/dirent.c')
-rw-r--r-- | app/tools/dirent.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/app/tools/dirent.c b/app/tools/dirent.c new file mode 100644 index 0000000..08ea800 --- /dev/null +++ b/app/tools/dirent.c @@ -0,0 +1,145 @@ +/* + + Implementation of POSIX directory browsing functions and types for Win32. + + Author: Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com) + History: Created March 1997. Updated June 2003. + Rights: See end of file. + +*/ + +#include <dirent.h> +#include <errno.h> +#include <io.h> /* _findfirst and _findnext set errno iff they return -1 */ +#include <stdlib.h> +#include <string.h> + +#ifdef __cplusplus +extern "C" +{ +#endif + +struct DIR +{ + long handle; /* -1 for failed rewind */ + struct _finddata_t info; + struct dirent result; /* d_name null iff first time */ + char *name; /* null-terminated char string */ +}; + +DIR *opendir(const char *name) +{ + DIR *dir = 0; + + if(name && name[0]) + { + size_t base_length = strlen(name); + const char *all = /* search pattern must end with suitable wildcard */ + strchr("/\\", name[base_length - 1]) ? "*" : "/*"; + + if((dir = (DIR *) malloc(sizeof *dir)) != 0 && + (dir->name = (char *) malloc(base_length + strlen(all) + 1)) != 0) + { + strcat(strcpy(dir->name, name), all); + + if((dir->handle = (long) _findfirst(dir->name, &dir->info)) != -1) + { + dir->result.d_name = 0; + } + else /* rollback */ + { + free(dir->name); + free(dir); + dir = 0; + } + } + else /* rollback */ + { + free(dir); + dir = 0; + errno = ENOMEM; + } + } + else + { + errno = EINVAL; + } + + return dir; +} + +int closedir(DIR *dir) +{ + int result = -1; + + if(dir) + { + if(dir->handle != -1) + { + result = _findclose(dir->handle); + } + + free(dir->name); + free(dir); + } + + if(result == -1) /* map all errors to EBADF */ + { + errno = EBADF; + } + + return result; +} + +struct dirent *readdir(DIR *dir) +{ + struct dirent *result = 0; + + if(dir && dir->handle != -1) + { + if(!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1) + { + result = &dir->result; + result->d_name = dir->info.name; + } + } + else + { + errno = EBADF; + } + + return result; +} + +void rewinddir(DIR *dir) +{ + if(dir && dir->handle != -1) + { + _findclose(dir->handle); + dir->handle = (long) _findfirst(dir->name, &dir->info); + dir->result.d_name = 0; + } + else + { + errno = EBADF; + } +} + +#ifdef __cplusplus +} +#endif + +/* + + Copyright Kevlin Henney, 1997, 2003. All rights reserved. + + Permission to use, copy, modify, and distribute this software and its + documentation for any purpose is hereby granted without fee, provided + that this copyright and permissions notice appear in all copies and + derivatives. + + This software is supplied "as is" without express or implied warranty. + + But that said, if there are any problems please get in touch. + +*/ |