File:  [local] / rpl / src / asprintf.c
Revision 1.4: download - view: text, annotated - select for diffs - revision graph
Wed Feb 10 10:14:18 2010 UTC (14 years, 2 months ago) by bertrand
Branches: MAIN
CVS tags: HEAD
Branchement vers 4.0.11

    1: /*
    2: ================================================================================
    3:   RPL/2 (R) version 4.0.11
    4:   Copyright (C) 1989-2010 Dr. BERTRAND Joël
    5: 
    6:   This file is part of RPL/2.
    7: 
    8:   RPL/2 is free software; you can redistribute it and/or modify it
    9:   under the terms of the CeCILL V2 License as published by the french
   10:   CEA, CNRS and INRIA.
   11:  
   12:   RPL/2 is distributed in the hope that it will be useful, but WITHOUT
   13:   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   14:   FITNESS FOR A PARTICULAR PURPOSE.  See the CeCILL V2 License
   15:   for more details.
   16:  
   17:   You should have received a copy of the CeCILL License
   18:   along with RPL/2. If not, write to info@cecill.info.
   19: ================================================================================
   20: */
   21: 
   22: 
   23: #include "rpl.h"
   24: #include <stdarg.h>
   25: 
   26: 
   27: int
   28: valsprintf(unsigned char **strp, const char *fmt, va_list ap)
   29: {
   30:     size_t          bs;
   31:     size_t          s;
   32:     unsigned char   *b = NULL;
   33: 
   34:     for(bs = 1024;; bs *= 2)
   35:     {
   36:         if (b != NULL)
   37:         {
   38:             free(b);
   39:         }
   40: 
   41:             if ((b = malloc(sizeof(*b) * bs)) == NULL)
   42:         {
   43:             return -1;
   44:         }
   45: 
   46:             if (((int) (s = vsnprintf(b, bs, fmt, ap))) < 0)
   47:         {
   48:             free(b);
   49:             return -1;
   50:         }
   51: 
   52:             if (s < bs)
   53:         {
   54:             break;
   55:         }
   56:     }
   57: 
   58:     if (((*strp) = realloc(b, ((s = strlen(b)) + 1) * sizeof(*b))) == NULL)
   59:     {
   60:         free(b);
   61:         return -1;
   62:     }
   63: 
   64:     return s;
   65: }
   66: 
   67: 
   68: int
   69: alsprintf(unsigned char **strp, const char *fmt, ...)
   70: {
   71:     int         done;
   72:     va_list     arg;
   73: 
   74:     va_start(arg, fmt);
   75:     done = valsprintf(strp, fmt, arg);
   76:     va_end(arg);
   77: 
   78:     return(done);
   79: }
   80: 
   81: // vim: ts=4

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