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kbuf.c
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C/C++ Source or Header
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1992-03-11
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1KB
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55 lines
#include "stdio.h"
#include "ed.h"
#define NBLOCK 16 /* Line block chunk size */
#define KBLOCK 256 /* Kill buffer block size */
char *kbufp = NULL; /* Kill buffer data */
int kused = 0; /* # of bytes used in KB */
int ksize = 0; /* # of bytes allocated in KB */
/*
* Delete all of the text
* saved in the kill buffer. Called by commands
* when a new kill context is being created. The kill
* buffer array is released, just in case the buffer has
* grown to immense size. No errors.
*/
kdelete()
{
if (kbufp != NULL) {
free((char *) kbufp);
kbufp =
kused =
ksize = 0;
}
}
/*
* Insert a character to the kill buffer,
* enlarging the buffer if there isn't any room. Always
* grow the buffer in chunks, on the assumption that if you
* put something in the kill buffer you are going to put
* more stuff there too later. Return TRUE if all is
* well, and FALSE on errors.
*/
kinsert(c)
{
register char *nbufp;
register int i;
if (kused == ksize) {
if ((nbufp=malloc(ksize+KBLOCK)) == NULL)
return (FALSE);
blockmv( nbufp, kbufp, ksize );
/* for (i=0; i<ksize; ++i) */
/* nbufp[i] = kbufp[i]; */
if (kbufp != NULL)
free((char *) kbufp);
kbufp = nbufp;
ksize += KBLOCK;
}
kbufp[kused++] = c;
return (TRUE);
}