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-rw-r--r--src/H5Fcore.c280
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diff --git a/src/H5Fcore.c b/src/H5Fcore.c
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--- a/src/H5Fcore.c
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-/*
- * Copyright (C) 1997 NCSA
- * All rights reserved.
- *
- * Programmer: Robb Matzke <matzke@llnl.gov>
- * Wednesday, October 22, 1997
- *
- * Purpose: This file implements an in-core temporary file. It's intended
- * for storing small temporary files such as wrappers generated
- * on the fly.
- *
- * Note: This is mostly an exercise to help clean up parts of the H5F
- * package since this driver is quite different than the other
- * low level drivers we have so far.
- *
- */
-#include <H5private.h>
-#include <H5Eprivate.h>
-#include <H5Fprivate.h>
-#include <H5MMprivate.h>
-
-#define H5F_CORE_DEV 0xffff /*pseudo dev for core until we fix things */
-
-#define PABLO_MASK H5Fcore_mask
-static intn interface_initialize_g = 0;
-#define INTERFACE_INIT NULL
-
-static htri_t H5F_core_access(const char *name,
- const H5F_access_t *access_parms, int mode,
- H5F_search_t *key/*out*/);
-static H5F_low_t *H5F_core_open(const char *name,
- const H5F_access_t *access_parms, uintn flags,
- H5F_search_t *key/*out*/);
-static herr_t H5F_core_close(H5F_low_t *lf, const H5F_access_t *access_parms);
-static herr_t H5F_core_read(H5F_low_t *lf, const H5F_access_t *access_parms,
- const H5F_xfer_t *xfer_parms, haddr_t addr,
- size_t size, uint8_t *buf);
-static herr_t H5F_core_write(H5F_low_t *lf, const H5F_access_t *access_parms,
- const H5F_xfer_t *xfer_parms, haddr_t addr,
- size_t size, const uint8_t *buf);
-
-const H5F_low_class_t H5F_LOW_CORE_g[1] = {{
- H5F_core_access, /*access method */
- H5F_core_open, /*open method */
- H5F_core_close, /*close method */
- H5F_core_read, /*read method */
- H5F_core_write, /*write method */
- NULL, /*flush method */
- NULL, /*extend method */
- NULL, /*alloc method */
-}};
-
-
-/*-------------------------------------------------------------------------
- * Function: H5F_core_access
- *
- * Purpose: Determines if the specified file already exists. This driver
- * doesn't use names, so every call to H5F_core_open() would
- * create a new file. Therefore, this function always returns
- * false and KEY is never initialized.
- *
- * Return: Non-negative on success/Negative on failure
- *
- * Programmer: Robb Matzke
- * Friday, October 24, 1997
- *
- * Modifications:
- *
- *-------------------------------------------------------------------------
- */
-static htri_t
-H5F_core_access(const char UNUSED*name,
- const H5F_access_t UNUSED *access_parms,
- int UNUSED mode, H5F_search_t UNUSED *key/*out*/)
-{
- FUNC_ENTER(H5F_core_access, FAIL);
- FUNC_LEAVE(FALSE);
-}
-
-
-/*-------------------------------------------------------------------------
- * Function: H5F_core_open
- *
- * Purpose: Opens a temporary file which will exist only in memory. The
- * NAME argument is unused. The FLAGS are a bit field with
- * the possible values defined in H5F_low_open().
- *
- * Errors:
- * IO CANTOPENFILE Must creat file with write access.
- *
- * Return: Success: Low-level file pointer
- *
- * Failure: NULL
- *
- * Programmer: Robb Matzke
- * Wednesday, October 22, 1997
- *
- * Modifications:
- *
- *-------------------------------------------------------------------------
- */
-static H5F_low_t *
-H5F_core_open(const char UNUSED *name,
- const H5F_access_t UNUSED *access_parms,
- uintn flags, H5F_search_t *key/*out*/)
-{
- H5F_low_t *lf = NULL;
- static ino_t ino = 0;
-
- FUNC_ENTER(H5F_core_open, NULL);
-
- if (0 == (flags & H5F_ACC_RDWR) || 0 == (flags & H5F_ACC_CREAT)) {
- HRETURN_ERROR(H5E_IO, H5E_CANTOPENFILE, NULL,
- "must creat file with write access");
- }
-
- if (NULL==(lf = H5MM_calloc(sizeof(H5F_low_t)))) {
- HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL,
- "memory allocation failed");
- }
- lf->u.core.mem = NULL;
- lf->u.core.alloc = 0;
- lf->u.core.size = 0;
- lf->eof = 0;
-
- if (key) {
- key->dev = H5F_CORE_DEV;
- key->ino = ino++;
- }
-
- FUNC_LEAVE(lf);
-}
-
-
-/*-------------------------------------------------------------------------
- * Function: H5F_core_close
- *
- * Purpose: Closes a file.
- *
- * Errors:
- *
- * Return: Non-negative on success/Negative on failure
- *
- * Programmer: Robb Matzke
- * Wednesday, October 22, 1997
- *
- * Modifications:
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5F_core_close(H5F_low_t *lf, const H5F_access_t UNUSED *access_parms)
-{
- FUNC_ENTER(H5F_core_close, FAIL);
-
- lf->u.core.mem = H5MM_xfree(lf->u.core.mem);
- lf->u.core.size = 0;
- lf->u.core.alloc = 0;
-
- FUNC_LEAVE(SUCCEED);
-}
-
-
-/*-------------------------------------------------------------------------
- * Function: H5F_core_read
- *
- * Purpose: Reads SIZE bytes beginning at address ADDR in file LF and
- * places them in buffer BUF. Reading past the logical or
- * physical end of the file returns zeros instead of failing.
- *
- * Errors:
- *
- * Return: Non-negative on success/Negative on failure
- *
- * Programmer: Robb Matzke
- * Wednesday, October 22, 1997
- *
- * Modifications:
- * Albert Cheng, 1998-06-02
- * Added XFER_MODE argument.
- *
- * Robb Matzke, 1999-07-28
- * The ADDR argument is passed by value.
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5F_core_read(H5F_low_t *lf, const H5F_access_t UNUSED *access_parms,
- const H5F_xfer_t UNUSED *xfer_parms, haddr_t addr,
- size_t size, uint8_t *buf)
-{
- size_t n;
- size_t eof;
-
- FUNC_ENTER(H5F_core_read, FAIL);
-
- assert(lf);
- assert(H5F_addr_defined(addr));
- assert(buf);
-
- eof = MIN(lf->eof, lf->u.core.size);
-
- if (addr >= eof) {
- HDmemset(buf, 0, size);
- } else {
- n = MIN(size, eof-addr);
- HDmemcpy(buf, lf->u.core.mem + addr, n);
- HDmemset(buf+n, 0, size-n);
- }
-
- FUNC_LEAVE(SUCCEED);
-}
-
-
-/*-------------------------------------------------------------------------
- * Function: H5F_core_write
- *
- * Purpose: Writes SIZE bytes from the beginning of BUF into file LF at
- * file address ADDR. The file is extended as necessary to
- * accommodate the new data.
- *
- * Errors:
- *
- * Return: Non-negative on success/Negative on failure
- *
- * Programmer: Robb Matzke
- * Wednesday, October 22, 1997
- *
- * Modifications:
- * Albert Cheng, 1998-06-02
- * Added XFER_MODE argument.
- *
- * Robb Matzke, 1999-07-28
- * The ADDR argument is passed by value.
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5F_core_write(H5F_low_t *lf, const H5F_access_t *access_parms,
- const H5F_xfer_t UNUSED *xfer_parms, haddr_t addr,
- size_t size, const uint8_t *buf)
-{
- size_t need_more, na;
- size_t increment = 1;
- uint8_t *x = NULL;
-
- FUNC_ENTER(H5F_core_write, FAIL);
-
- assert(lf);
- assert(H5F_addr_defined(addr));
- assert(buf);
- assert (!access_parms || H5F_LOW_CORE==access_parms->driver);
-
- /*
- * Allocate more space. We always allocate a multiple of the increment
- * size, which is either defined in the file access property list or
- * which defaults to one.
- */
- if (addr + size > lf->u.core.alloc) {
- if (access_parms) increment = access_parms->u.core.increment;
- need_more = addr+size - lf->u.core.alloc;
- need_more = increment*((need_more+increment-1)/increment);
-
- na = lf->u.core.alloc + need_more;
- if (NULL==(x = H5MM_realloc (lf->u.core.mem, na))) {
- HRETURN_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL,
- "memory allocation failed");
- }
- lf->u.core.alloc = na;
- lf->u.core.mem = x;
- }
-
- /* Move the physical EOF marker */
- if (addr + size > lf->u.core.size) {
- lf->u.core.size = addr + size;
- }
-
- /* Copy data */
- HDmemcpy(lf->u.core.mem+addr, buf, size);
-
- FUNC_LEAVE(SUCCEED);
-}
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