115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/* dstring.c - The dynamic string handling routines used by cpio.
|
|
Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#include <stdio.h>
|
|
#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
|
|
#include <string.h>
|
|
#else
|
|
#include <strings.h>
|
|
#endif
|
|
#include "dstring.h"
|
|
|
|
#if __STDC__
|
|
# define P_(s) s
|
|
#else
|
|
# define P_(s) ()
|
|
#endif
|
|
char *xmalloc P_((unsigned n));
|
|
char *xrealloc P_((char *p, unsigned n));
|
|
|
|
/* Initialiaze dynamic string STRING with space for SIZE characters. */
|
|
|
|
void
|
|
ds_init (string, size)
|
|
dynamic_string *string;
|
|
int size;
|
|
{
|
|
string->ds_length = size;
|
|
string->ds_string = (char *) xmalloc (size);
|
|
}
|
|
|
|
/* Expand dynamic string STRING, if necessary, to hold SIZE characters. */
|
|
|
|
void
|
|
ds_resize (string, size)
|
|
dynamic_string *string;
|
|
int size;
|
|
{
|
|
if (size > string->ds_length)
|
|
{
|
|
string->ds_length = size;
|
|
string->ds_string = (char *) xrealloc ((char *) string->ds_string, size);
|
|
}
|
|
}
|
|
|
|
/* Dynamic string S gets a string terminated by the EOS character
|
|
(which is removed) from file F. S will increase
|
|
in size during the function if the string from F is longer than
|
|
the current size of S.
|
|
Return NULL if end of file is detected. Otherwise,
|
|
Return a pointer to the null-terminated string in S. */
|
|
|
|
char *
|
|
ds_fgetstr (f, s, eos)
|
|
FILE *f;
|
|
dynamic_string *s;
|
|
char eos;
|
|
{
|
|
int insize; /* Amount needed for line. */
|
|
int strsize; /* Amount allocated for S. */
|
|
int next_ch;
|
|
|
|
/* Initialize. */
|
|
insize = 0;
|
|
strsize = s->ds_length;
|
|
|
|
/* Read the input string. */
|
|
next_ch = getc (f);
|
|
while (next_ch != eos && next_ch != EOF)
|
|
{
|
|
if (insize >= strsize - 1)
|
|
{
|
|
ds_resize (s, strsize * 2 + 2);
|
|
strsize = s->ds_length;
|
|
}
|
|
s->ds_string[insize++] = next_ch;
|
|
next_ch = getc (f);
|
|
}
|
|
s->ds_string[insize++] = '\0';
|
|
|
|
if (insize == 1 && next_ch == EOF)
|
|
return NULL;
|
|
else
|
|
return s->ds_string;
|
|
}
|
|
|
|
char *
|
|
ds_fgets (f, s)
|
|
FILE *f;
|
|
dynamic_string *s;
|
|
{
|
|
return ds_fgetstr (f, s, '\n');
|
|
}
|
|
|
|
char *
|
|
ds_fgetname (f, s)
|
|
FILE *f;
|
|
dynamic_string *s;
|
|
{
|
|
return ds_fgetstr (f, s, '\0');
|
|
}
|