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/*
* This software is copyrighted as noted below. It may be freely copied,
* modified, and redistributed, provided that the copyright notice is
* preserved on all copies.
*
* There is no warranty or other guarantee of fitness for this software,
* it is provided solely "as is". Bug reports or fixes may be sent
* to the author, who may or may not act on them as he desires.
*
* You may not include this software in a program or other software product
* without supplying the source, or without informing the end-user that the
* source is available for no extra charge.
*
* If you modify this software, you should include a notice giving the
* name of the person performing the modification, the date of modification,
* and the reason for such modification.
*/
/*
* rle_addhist.c - Add to the HISTORY comment in header
*
* Author: Andrew Marriott.
* School of Computer Science
* Curtin University of Technology
* Date: Mon Sept 10 1988
* Copyright (c) 1988, Curtin University of Technology
*/
#include "rle.h"
#include <string.h>
#include <stdio.h>
#ifdef USE_TIME_H
#include <time.h>
#else
#include <sys/types.h>
#include <sys/time.h>
#endif
#include "netpbm/mallocvar.h"
/*****************************************************************
* TAG( rle_addhist )
*
* Put a history comment into the header struct.
* Inputs:
* argv: Command line history to add to comments.
* in_hdr: Incoming header struct to use.
* Outputs:
* out_hdr: Outgoing header struct to add to.
* Assumptions:
* If no incoming struct then value is NULL.
* Algorithm:
* Calculate length of all comment strings, malloc and then set via
* rle_putcom.
*/
void
rle_addhist(char * argv[],
rle_hdr * const in_hdr,
rle_hdr * const out_hdr) {
const char * const histoire = "HISTORY";
const char * const padding = "\t";
int length;
int i;
time_t temp;
/* padding must give number of characters in histoire */
/* plus one for "=" */
char * timedate;
const char * old;
static char * newc;
if (getenv("NO_ADD_RLE_HISTORY"))
return;
length = 0;
for (i = 0; argv[i]; ++i)
length += strlen(argv[i]) +1; /* length of each arg plus space. */
time(&temp);
timedate = ctime(&temp);
length += strlen(timedate); /* length of date and time in ASCII. */
length += strlen(padding) + 3 + strlen(histoire) + 1;
/* length of padding, "on " and length of history name plus "="*/
if (in_hdr) /* if we are interested in the old comments... */
old = rle_getcom(histoire, in_hdr); /* get old comment. */
else
old = NULL;
if (old && *old)
length += strlen(old); /* add length if there. */
++length; /*Cater for the null. */
MALLOCARRAY(newc, length);
if (newc == NULL)
return;
strcpy(newc,histoire);(void)strcat(newc,"=");
if (old && *old)
strcat(newc, old); /* add old string if there. */
for (i=0;argv[i];i++) {
strcat(newc, argv[i]);
strcat(newc, " ");
}
strcat(newc,"on ");
strcat(newc,timedate); /* \n supplied by time. */
strcat(newc,padding); /* to line up multiple histories.*/
rle_putcom(newc, out_hdr);
}
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