102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
/*
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sizebuf.c
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(description)
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/sizebuf.h"
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#include "QF/sys.h"
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#include "QF/zone.h"
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VISIBLE void
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SZ_Alloc (sizebuf_t *buf, int startsize)
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{
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if (startsize < 256)
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startsize = 256;
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buf->data = Hunk_AllocName (startsize, "sizebuf");
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buf->maxsize = startsize;
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buf->cursize = 0;
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}
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VISIBLE void
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SZ_Clear (sizebuf_t *buf)
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{
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buf->cursize = 0;
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buf->overflowed = false;
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}
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VISIBLE void *
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SZ_GetSpace (sizebuf_t *buf, int length)
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{
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void *data;
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if (buf->cursize + length <= buf->maxsize) {
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getspace:
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data = buf->data + buf->cursize;
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buf->cursize += length;
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return data;
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}
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if (!buf->allowoverflow)
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Sys_Error ("SZ_GetSpace: overflow without allowoverflow set (%d)",
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buf->maxsize);
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if (length > buf->maxsize)
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Sys_Error ("SZ_GetSpace: %i is > full buffer size", length);
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Sys_Printf ("SZ_GetSpace: overflow\n");
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SZ_Clear (buf);
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buf->overflowed = true;
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goto getspace;
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}
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VISIBLE void
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SZ_Write (sizebuf_t *buf, const void *data, int length)
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{
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memcpy (SZ_GetSpace (buf, length), data, length);
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}
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VISIBLE void
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SZ_Print (sizebuf_t *buf, const char *data)
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{
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int len;
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len = strlen (data) + 1;
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if (buf->cursize && !buf->data[buf->cursize - 1])
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buf->cursize--; // write over trailing 0
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memcpy (SZ_GetSpace (buf, len), data, len);
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}
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