trace_buf.c   [plain text]

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/****************************************************************************
 *  Author: Thomas E. Dickey <dickey@clark.net> 1997                        *
 ****************************************************************************/
/*
 *	trace_buf.c - Tracing/Debugging buffers (attributes)
 */

#include <curses.priv.h>

MODULE_ID("$Id: trace_buf.c,v 1.1.1.1 2001/11/29 20:40:58 jevans Exp $")

typedef struct {
    char *text;
    size_t size;
} LIST;

NCURSES_EXPORT(char *)
_nc_trace_buf(int bufnum, size_t want)
{
    static LIST *list;
    static size_t have;

#if NO_LEAKS
    if (bufnum < 0) {
	if (have) {
	    while (have--) {
		if (list[have].text != 0)
		    free(list[have].text);
	    }
	    free(list);
	}
	return 0;
    }
#endif

    if ((size_t) (bufnum + 1) > have) {
	size_t need = (bufnum + 1) * 2;
	if ((list = typeRealloc(LIST, need, list)) == 0)
	    return (0);
	while (need > have)
	    list[have++].text = 0;
    }

    if (list[bufnum].text == 0
	|| want > list[bufnum].size) {
	if ((list[bufnum].text = typeRealloc(char, want, list[bufnum].text))
	    != 0)
	      list[bufnum].size = want;
    }

    if (list[bufnum].text != 0)
	*(list[bufnum].text) = '\0';
    return list[bufnum].text;
}