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Diffstat (limited to 'src/helper/membuf.c')
| -rw-r--r-- | src/helper/membuf.c | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/src/helper/membuf.c b/src/helper/membuf.c deleted file mode 100644 index 766364a8..00000000 --- a/src/helper/membuf.c +++ /dev/null @@ -1,240 +0,0 @@ -/*************************************************************************** - * Copyright (C) 2009 By Duane Ellis * - * openocd@duaneellis.com * - * * - * 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., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - ***************************************************************************/ - -#include <stdio.h> -#include <stdarg.h> -#include <stdlib.h> -#include <string.h> - -#include "membuf.h" - -struct membuf { - // buflen is alway "+1" bigger then - // what is shown here, the +1 is for - // the NULL string terminator -#define DEFAULT_BUFSIZE 100 - size_t maxlen; // allocated size - size_t curlen; // where we are inserting at - char *_strtoklast; - void *buf; -}; - - -#define space_avail(pBuf) (pBuf->maxlen - pBuf->curlen) -#define dataend(pBuf) (((char *)(pBuf->buf)) + pBuf->curlen) - -size_t -membuf_len(struct membuf *pBuf) -{ - return pBuf->curlen; -} - -const void * -membuf_datapointer(struct membuf *pBuf) -{ - return ((void *)(pBuf->buf)); -} - -const char * -membuf_strtok(struct membuf *pBuf, const char *sep, void **pLast) -{ - if (pBuf) { - pBuf->_strtoklast = NULL; - *pLast = pBuf; - // this should be "strtok_r()" but windows lacks */ - return strtok(((char *)(pBuf->buf)), sep); - } else { - // recover our pBuf - pBuf = *((struct membuf **)(pLast)); - // this should be "strtok_r()" but windows lacks */ - return strtok( NULL, sep); - } -} - - - -struct membuf * -membuf_new(void) -{ - // by default - parameters are zero. - struct membuf *pBuf; - - pBuf = calloc(1, sizeof(*pBuf)); - if (pBuf) { - // we *ALWAYS* allocate +1 for null terminator. - pBuf->buf = calloc(DEFAULT_BUFSIZE + 1, sizeof(char)); - if (pBuf->buf == NULL) { - free(pBuf); - pBuf = NULL; - } else { - pBuf->maxlen = DEFAULT_BUFSIZE; - } - } - return pBuf; -} - - -struct membuf * -membuf_grow(struct membuf *pBuf, int n) -{ - void *vp; - signed int newsize; - - // this is a *SIGNED* value - newsize = ((int)(pBuf->maxlen)) + n; - - // do not go negative, or too small - if (newsize < DEFAULT_BUFSIZE) { - newsize = DEFAULT_BUFSIZE; - } - - // always alloc +1 for the null terminator - vp = realloc(pBuf->buf, newsize + 1); - if (vp) { - pBuf->buf = vp; - pBuf->maxlen = newsize; - return pBuf; - } else { - return NULL; - } -} - - -void membuf_reset(struct membuf *pBuf) -{ - pBuf->curlen = 0; -} - - -void membuf_delete(struct membuf *pBuf) -{ - if (pBuf) { - if (pBuf->buf) { - // wack data so it cannot be reused - memset(pBuf->buf,0,pBuf->maxlen); - free(pBuf->buf); - } - // wack dat so it cannot be reused - memset(pBuf,0,sizeof(pBuf)); - free(pBuf); - } -} - -int -membuf_sprintf(struct membuf *pBuf , const char *fmt, ...) -{ - int r; - va_list ap; - va_start(ap, fmt); - r = membuf_vsprintf(pBuf, fmt, ap); - va_end(ap); - return r; -} - -int -membuf_vsprintf(struct membuf *pBuf, const char *fmt, va_list ap) -{ - int r; - size_t sa; - int grew; - - - grew = 0; - for (;;) { - sa = space_avail(pBuf); - - // do work - r = vsnprintf(dataend(pBuf), - sa, - fmt, - ap); - if ((r > 0) && (((size_t)(r)) < sa)) { - // Success! - pBuf->curlen += ((size_t)(r)); - // remember: We always alloc'ed +1 - // so this does not overflow - ((char *)(pBuf->buf))[ pBuf->curlen ] = 0; - r = 0; - break; - } - - // failure - if (r < 0) { - // Option(A) format error - // Option(B) glibc2.0 bug - // assume (B). - r = (4 * DEFAULT_BUFSIZE); - } - - // don't do this again - if (grew) { - r = -1; - break; - } - grew = 1; - pBuf = membuf_grow(pBuf, r); - if (pBuf == NULL) { - // grow failed - r = -1; - break; - } - } - return r; -} - -struct membuf * -membuf_strcat(struct membuf *pBuf, const char *pStr) -{ - return membuf_append(pBuf, pStr, strlen(pStr)); -} - -struct membuf * -membuf_append(struct membuf *pBuf, const void *pData, size_t len) -{ - size_t sa; - int r; - - // how much room is there? - sa = space_avail(pBuf); - - // will it fit? - if (sa < len) { - // if not, how much do we need? - r = ((int)(sa - len)); - // do the grow. - pBuf = membuf_grow(pBuf, r); - // failed? - if (pBuf == NULL) { - return pBuf; - } - } - // append - memcpy(dataend(pBuf), - pData, - len); - pBuf->curlen += len; - return pBuf; -} - - - - - - |