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Annotation of rpl/src/asprintf.c, revision 1.6

1.1       bertrand    1: /*
                      2: ================================================================================
1.6     ! bertrand    3:   RPL/2 (R) version 4.0.12
1.3       bertrand    4:   Copyright (C) 1989-2010 Dr. BERTRAND Joël
1.1       bertrand    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: 
1.2       bertrand   23: #include "rpl.h"
1.1       bertrand   24: #include <stdarg.h>
1.2       bertrand   25: 
1.1       bertrand   26: 
                     27: int
1.2       bertrand   28: valsprintf(unsigned char **strp, const char *fmt, va_list ap)
1.1       bertrand   29: {
1.3       bertrand   30:    size_t          bs;
                     31:    size_t          s;
1.5       bertrand   32: 
1.3       bertrand   33:    unsigned char   *b = NULL;
1.1       bertrand   34: 
1.5       bertrand   35:    va_list         cap;
                     36: 
1.3       bertrand   37:    for(bs = 1024;; bs *= 2)
1.1       bertrand   38:    {
1.5       bertrand   39:        va_copy(cap, ap);
                     40: 
1.3       bertrand   41:        if (b != NULL)
                     42:        {
                     43:            free(b);
                     44:        }
                     45: 
1.5       bertrand   46:        if ((b = malloc(sizeof(*b) * bs)) == NULL)
1.3       bertrand   47:        {
                     48:            return -1;
                     49:        }
                     50: 
1.5       bertrand   51:        if (((int) (s = vsnprintf(b, bs, fmt, cap))) < 0)
1.3       bertrand   52:        {
                     53:            free(b);
                     54:            return -1;
                     55:        }
                     56: 
1.5       bertrand   57:        if (s < bs)
1.3       bertrand   58:        {
                     59:            break;
                     60:        }
1.1       bertrand   61:    }
                     62: 
1.3       bertrand   63:    if (((*strp) = realloc(b, ((s = strlen(b)) + 1) * sizeof(*b))) == NULL)
1.1       bertrand   64:    {
                     65:        free(b);
                     66:        return -1;
                     67:    }
                     68: 
1.3       bertrand   69:    return s;
1.1       bertrand   70: }
                     71: 
                     72: 
                     73: int
1.2       bertrand   74: alsprintf(unsigned char **strp, const char *fmt, ...)
1.1       bertrand   75: {
1.3       bertrand   76:    int         done;
                     77:    va_list     arg;
1.1       bertrand   78: 
1.3       bertrand   79:    va_start(arg, fmt);
                     80:    done = valsprintf(strp, fmt, arg);
                     81:    va_end(arg);
1.1       bertrand   82: 
1.3       bertrand   83:    return(done);
1.1       bertrand   84: }
                     85: 
                     86: // vim: ts=4