130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
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/* Public Domain Curses */
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#include "pdcdos.h"
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RCSID("$Id: pdcclip.c,v 1.33 2008/07/13 16:08:17 wmcbrine Exp $")
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#include <stdlib.h>
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/*man-start**************************************************************
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Name: clipboard
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Synopsis:
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int PDC_getclipboard(char **contents, long *length);
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int PDC_setclipboard(const char *contents, long length);
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int PDC_freeclipboard(char *contents);
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int PDC_clearclipboard(void);
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Description:
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PDC_getclipboard() gets the textual contents of the system's
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clipboard. This function returns the contents of the clipboard
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in the contents argument. It is the responsibilitiy of the
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caller to free the memory returned, via PDC_freeclipboard().
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The length of the clipboard contents is returned in the length
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argument.
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PDC_setclipboard copies the supplied text into the system's
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clipboard, emptying the clipboard prior to the copy.
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PDC_clearclipboard() clears the internal clipboard.
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Return Values:
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indicator of success/failure of call.
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PDC_CLIP_SUCCESS the call was successful
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PDC_CLIP_MEMORY_ERROR unable to allocate sufficient memory for
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the clipboard contents
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PDC_CLIP_EMPTY the clipboard contains no text
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PDC_CLIP_ACCESS_ERROR no clipboard support
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Portability X/Open BSD SYS V
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PDC_getclipboard - - -
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PDC_setclipboard - - -
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PDC_freeclipboard - - -
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PDC_clearclipboard - - -
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**man-end****************************************************************/
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/* global clipboard contents, should be NULL if none set */
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static char *pdc_DOS_clipboard = NULL;
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int PDC_getclipboard(char **contents, long *length)
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{
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int len;
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PDC_LOG(("PDC_getclipboard() - called\n"));
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if (!pdc_DOS_clipboard)
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return PDC_CLIP_EMPTY;
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len = strlen(pdc_DOS_clipboard);
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if ((*contents = malloc(len + 1)) == NULL)
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return PDC_CLIP_MEMORY_ERROR;
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strcpy(*contents, pdc_DOS_clipboard);
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*length = len;
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return PDC_CLIP_SUCCESS;
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}
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int PDC_setclipboard(const char *contents, long length)
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{
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PDC_LOG(("PDC_setclipboard() - called\n"));
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if (pdc_DOS_clipboard)
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{
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free(pdc_DOS_clipboard);
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pdc_DOS_clipboard = NULL;
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}
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if (contents)
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{
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if ((pdc_DOS_clipboard = malloc(length + 1)) == NULL)
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return PDC_CLIP_MEMORY_ERROR;
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strcpy(pdc_DOS_clipboard, contents);
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}
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return PDC_CLIP_SUCCESS;
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}
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int PDC_freeclipboard(char *contents)
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{
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PDC_LOG(("PDC_freeclipboard() - called\n"));
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/* should we also free empty the system clipboard? probably not */
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if (contents)
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{
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/* NOTE: We free the memory, but we can not set caller's pointer
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to NULL, so if caller calls again then will try to access
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free'd memory. We 1st overwrite memory with a string so if
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caller tries to use free memory they won't get what they
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expect & hopefully notice. */
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/* memset(contents, 0xFD, strlen(contents)); */
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if (strlen(contents) >= strlen("PDCURSES"))
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strcpy(contents, "PDCURSES");
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free(contents);
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}
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return PDC_CLIP_SUCCESS;
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}
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int PDC_clearclipboard(void)
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{
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PDC_LOG(("PDC_clearclipboard() - called\n"));
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if (pdc_DOS_clipboard)
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{
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free(pdc_DOS_clipboard);
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pdc_DOS_clipboard = NULL;
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}
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return PDC_CLIP_SUCCESS;
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}
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