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3265 post 1
/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
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 * Copyright (C) 1998 by Wes Peters <wes@softweyr.com>
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 * Copyright (c) 1988, 1993 The Regents of the University of California.
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 * All rights reserved by all copyright holders.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * Redistributions of source code must retain the above copyright notice, this
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 * list of conditions and the following disclaimer.
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 *
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 * Redistributions in binary form must reproduce the above copyright notice,
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 * this list of conditions and the following disclaimer in the documentation
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 * and/or other materials provided with the distribution.
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 *
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 * Neither the name of the original program's authors nor the names of its
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 * contributors may be used to endorse or promote products derived from this
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 * software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 */
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/* NOTES:
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 * 1 - Various functions were adapted from FreeBSD (copyright holders noted above)
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 *     these functions are identified with comments.
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 *
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 * 2 - Some of these have since appeared in libc. They remain here for various
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 *     reasons, such as the eventual integration of garbage collection for things
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 *     that allocate memory and don't automatically free it.
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 *
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 * 3 - Things that expect a pointer to an allocated string do _no_ sanity checking
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 *     if developing on a simulator with no debugger, take care :)
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 */
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdlib.h>
3345 post 49
#include <stdarg.h>
3265 post 50
 
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#include "config.h"
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#include "errors.h"
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#include "util.h"
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3345 post 55
/* some platforms do not have strdup, implement it here.
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 * Returns a pointer to an allocated string or NULL on failure */
3265 post 57
char * cli_strdup(const char *s1)
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{
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    size_t len = strlen(s1) + 1;
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    void *ret = malloc(len);
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    if (ret == NULL)
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        return (char *) NULL;
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    return (char *) memcpy(ret, s1, len);
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}
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3345 post 68
/*
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 * Take a previously allocated string (s1), re-size it to accept s2 and copy
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 * the contents of s2 into s1.
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 * Return -1 on failure, or the length of the copied string on success.
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 */
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int cli_redup(char **s1, const char *s2)
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{
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    size_t len = strlen(s2) + 1;
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    if (! len)
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        return -1;
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    *s1 = realloc(*s1, len);
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    if (*s1 == NULL)
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        return -1;
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    memset(*s1, 0, sizeof(*s1));
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    memcpy(*s1, s2, len);
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    return (int) len;
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}
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/* An asprintf() for concantenating paths. Allocates the system PATH_MAX value,
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 * expands the formatted string and re-sizes the block s1 points to accordingly.
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 *
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 * Returns the length of the new s1 on success, -1 on failure. On failure, an
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 * attempt is made to return s1 unmodified for sanity, in this case 0 is returned.
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 * to indicate that s1 was not modified.
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 *
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 * FIXME: ugly hack to get around asprintf(), if you use this, CHECK ITS VALUE! */
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int cli_psprintf(char **s1, const char *fmt, ...)
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{
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    va_list ap;
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    size_t needed, base = PATH_MAX + 1;
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    char *tmp = (char *) malloc(base);
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    if (NULL == tmp)
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        return -1;
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    char *orig = *s1;
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    memset(tmp, 0, sizeof(tmp));
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    va_start(ap, fmt);
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    vsnprintf(tmp, base, fmt, ap);
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    va_end(ap);
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    needed = strlen(tmp) + 1;
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    *s1 = realloc(*s1, needed);
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    if (NULL == *s1) {
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        *s1 = realloc(*s1, strlen(orig) + 1);
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        if (NULL == *s1) {
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            free(tmp);
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            return -1;
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        }
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        memset(*s1, 0, sizeof(*s1));
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        memcpy(*s1, orig, strlen(orig) + 1);
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        free(tmp);
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        return 0;
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    }
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    memset(*s1, 0, sizeof(*s1));
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    memcpy(*s1, tmp, needed);
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    free(tmp);
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    return (int) needed;
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}
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3265 post 133
/* Ported from FBSD strtok.c 8.1 (Berkeley) 6/4/93 */
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char * cli_strtok_r(char *s, const char *delim, char **last)
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{
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    char *spanp, *tok;
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    int c, sc;
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    if (s == NULL && (s = *last) == NULL)
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        return (NULL);
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cont:
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    c = *s++;
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    for (spanp = (char *)delim; (sc = *spanp++) != 0;) {
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        if (c == sc)
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            goto cont;
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    }
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    if (c == 0) {       /* no non-delimiter characters */
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        *last = NULL;
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        return (NULL);
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    }
3269 post 153
 
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    tok = s - 1;
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    for (;;) {
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        c = *s++;
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        spanp = (char *)delim;
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        do {
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            if ((sc = *spanp++) == c) {
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                if (c == 0)
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                    s = NULL;
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                else
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                    s[-1] = '\0';
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                *last = s;
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                return (tok);
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            }
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        } while (sc != 0);
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    }
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}
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/* Ported from FBSD strtok.c 8.1 (Berkeley) 6/4/93 */
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char * cli_strtok(char *s, const char *delim)
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{
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    static char *last;
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    return (cli_strtok_r(s, delim, &last));
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}