/* * hfsutils - tools for reading and writing Macintosh HFS volumes * Copyright (C) 1996-1998 Robert Leslie * * 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 of the License, 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. * * $Id: dstring.c,v 1.7 1998/11/02 22:08:28 rob Exp $ */ # ifdef HAVE_CONFIG_H#  include "config.h"# endif # include <stdlib.h># include <string.h> # include "dstring.h" /* * NAME:	dstring->init() * DESCRIPTION:	initialize a new dynamic string */void dstr_init(dstring *string){  string->str     = string->sbuf;  string->len     = 0;  string->space   = sizeof(string->sbuf);  string->sbuf[0] = 0;} /* * NAME:	dstring->append() * DESCRIPTION:	append to a dynamic string */int dstr_append(dstring *string, const char *str, size_t len){  size_t newlen;   if (len == (size_t) -1)    len = strlen(str);   newlen = string->len + len;   /* make sure there is room */   if (newlen >= string->space)    {      char *new;       newlen *= 2;       new = malloc(newlen);      if (new == 0)	return -1;       string->space = newlen;       memcpy(new, string->str, string->len);       if (string->str != string->sbuf)	free(string->str);       string->str = new;    }   /* append the string */   memcpy(string->str + string->len, str, len);   string->len += len;  string->str[string->len] = 0;   return 0;} /* * NAME:	dstring->string() * DESCRIPTION:	return a pointer to a dynamic string's content */char *dstr_string(dstring *string){  return string->str;} /* * NAME:	dstring->length() * DESCRIPTION:	return the length of a dynamic string */int dstr_length(dstring *string){  return string->len;} /* * NAME:	dstring->shrink() * DESCRIPTION:	truncate a dynamic string to a shorter length */void dstr_shrink(dstring *string, size_t len){  if (len < string->len)    string->len = len;} /* * NAME:	dstring->free() * DESCRIPTION:	free a dynamic string */void dstr_free(dstring *string){  if (string->str != string->sbuf)    free(string->str);}