99 lines
1.6 KiB
C
99 lines
1.6 KiB
C
#define WIN32_LEAN_AND_MEAN
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#include <errno.h>
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#include <stdlib.h>
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#include <windows.h> // FindFirstFile, FindNextFile
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#include "readdir.h"
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typedef struct dir_private
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{
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HANDLE h;
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int first_read;
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struct dirent buf;
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} DIR;
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DIR *opendir(const char *name)
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{
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DIR *ret = NULL;
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char name2[MAX_PATH];
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WIN32_FIND_DATAA findData;
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if (strlen(name) >= MAX_PATH - 2 - 1)
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{
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errno = ENAMETOOLONG;
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return ret;
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}
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strcpy(name2, name);
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strcat(name2, "/*");
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if (!(ret = (DIR *)malloc(sizeof(DIR))))
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{
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errno = ENOMEM;
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return ret;
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}
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ret->h = FindFirstFileA(name2, &findData);
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if (ret->h == INVALID_HANDLE_VALUE)
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{
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DWORD err = GetLastError();
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free(ret);
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ret = NULL;
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switch (err)
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{
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case ERROR_FILE_NOT_FOUND: errno = ENOENT; break;
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case ERROR_PATH_NOT_FOUND: errno = ENOENT; break;
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case ERROR_ACCESS_DENIED: errno = EACCES; break;
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case ERROR_DIRECTORY: errno = ENOTDIR; break;
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default: errno = EINVAL;
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}
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return ret;
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}
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strcpy(ret->buf.d_name, findData.cFileName);
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ret->first_read = 1;
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return ret;
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}
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struct dirent *readdir(DIR *dir)
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{
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WIN32_FIND_DATAA findData;
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if (!dir)
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{
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errno = EBADF;
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return NULL;
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}
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if (dir->first_read)
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{
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dir->first_read = 0;
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return &dir->buf;
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}
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if (!FindNextFileA(dir->h, &findData))
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{
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switch (GetLastError())
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{
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case ERROR_NO_MORE_FILES: errno = ENOENT; break;
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case ERROR_INVALID_HANDLE: errno = EBADF; break;
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default: errno = EINVAL;
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}
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return NULL;
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}
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strcpy(dir->buf.d_name, findData.cFileName);
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return &dir->buf;
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}
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int closedir(DIR *dir)
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{
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if (!dir)
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{
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errno = EBADF;
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return -1;
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}
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FindClose(dir->h);
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free(dir);
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return 0;
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}
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