X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=platform%2Fexample%2Finternals%2F_PDCLIB_config.h;h=6864eb9a4b11f6b8e68566b5a1be13fe10305b39;hb=393020b6e48719d27699dea6b29e53025bbd5123;hp=5c7210ad763c693b47cb0d8d693f2cf370eadb0c;hpb=ac888cf8ada81fe577ba3da053be3379b85b6499;p=pdclib

diff --git a/platform/example/internals/_PDCLIB_config.h b/platform/example/internals/_PDCLIB_config.h
index 5c7210a..6864eb9 100644
--- a/platform/example/internals/_PDCLIB_config.h
+++ b/platform/example/internals/_PDCLIB_config.h
@@ -123,6 +123,7 @@ struct _PDCLIB_lldiv_t
    interrupts). The type itself is not defined in a freestanding environment,
    but its limits are. (Don't ask.)
 */
+#define _PDCLIB_sig_atomic int
 #define _PDCLIB_SIG_ATOMIC INT
 
 /* Result type of the 'sizeof' operator (must be unsigned) */
@@ -215,37 +216,33 @@ typedef char * _PDCLIB_va_list;
 
 /* Set this to the page size of your OS. If your OS does not support paging, set
    to an appropriate value. (Too small, and malloc() will call the kernel too
-   often. Too large, and you will waste memory.
+   often. Too large, and you will waste memory.)
 */
 #define _PDCLIB_PAGESIZE 4096
 
-/* Set this to the minimum memory node size. Any malloc() for a smaller siz
-   will be satisfied by a malloc() of this size instead.
+/* Set this to the minimum memory node size. Any malloc() for a smaller size
+   will be satisfied by a malloc() of this size instead (to avoid excessive
+   fragmentation).
 */
 #define _PDCLIB_MINALLOC 8
 
 /* I/O ---------------------------------------------------------------------- */
 
-/* The unique file descriptor returned by _PDCLIB_open(). */
+/* The type of the file descriptor returned by _PDCLIB_open(). */
 typedef int _PDCLIB_fd_t;
 
 /* The value (of type _PDCLIB_fd_t) returned by _PDCLIB_open() if the operation
    failed.
 */
-#define _PDCLIB_NOHANDLE -1
-
-/* A type in which to store file offsets. See fgetpos() / fsetpos(). */
-typedef struct
-{
-    int position;
-    int parse_state;
-} _PDCLIB_fpos_t;
+#define _PDCLIB_NOHANDLE ( (_PDCLIB_fd_t) -1 )
 
 /* The default size for file buffers. Must be at least 256. */
 #define _PDCLIB_BUFSIZ 1024
 
 /* The minimum number of files the implementation can open simultaneously. Must
-   be at least 8.
+   be at least 8. Depends largely on how the bookkeeping is done by fopen() /
+   freopen() / fclose(). The example implementation limits the number of open
+   files only by available memory.
 */
 #define _PDCLIB_FOPEN_MAX 8
 
@@ -257,3 +254,18 @@ typedef struct
 
 /* Number of distinct file names that can be generated by tmpnam(). */
 #define _PDCLIB_TMP_MAX 50
+
+/* The values of SEEK_SET, SEEK_CUR and SEEK_END, used by fseek().
+   Since at least one platform (POSIX) uses the same symbols for its own "seek"
+   function, we use whatever the host defines (if it does define them).
+*/
+#define _PDCLIB_SEEK_SET 0
+#define _PDCLIB_SEEK_CUR 1
+#define _PDCLIB_SEEK_END 2
+
+/* The number of characters that can be buffered with ungetc(). The standard
+   guarantees only one (1); anything larger would make applications relying on
+   this capability dependent on implementation-defined behaviour (not good).
+*/
+#define _PDCLIB_UNGETCBUFSIZE 1
+