Annotation of rpl/src/asprintf.c, revision 1.1
1.1 ! bertrand 1: /*
! 2: ================================================================================
! 3: RPL/2 (R) version 4.0.10
! 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 <stdio.h>
! 24: #include <stdlib.h>
! 25: #include <stdarg.h>
! 26: #include <string.h>
! 27: #include <strings.h>
! 28:
! 29: int
! 30: vasprintf(char **strp, const char *fmt, va_list ap)
! 31: {
! 32: size_t bs;
! 33: size_t s;
! 34: char *b = NULL;
! 35:
! 36: for(bs = 1024;; bs *= 2)
! 37: {
! 38: if (b != NULL)
! 39: {
! 40: free(b);
! 41: }
! 42:
! 43: if ((b = malloc(sizeof(*b) * bs)) == NULL)
! 44: {
! 45: return -1;
! 46: }
! 47:
! 48: if (((int) (s = vsnprintf(b, bs, fmt, ap))) < 0)
! 49: {
! 50: free(b);
! 51: return -1;
! 52: }
! 53:
! 54: if (s < bs)
! 55: {
! 56: break;
! 57: }
! 58: }
! 59:
! 60: if (((*strp) = realloc(b, ((s = strlen(b)) + 1) * sizeof(*b)))
! 61: == NULL)
! 62: {
! 63: free(b);
! 64: return -1;
! 65: }
! 66:
! 67: return s;
! 68: }
! 69:
! 70:
! 71: int
! 72: asprintf(char **strp, const char *fmt, ...)
! 73: {
! 74: int done;
! 75: va_list arg;
! 76:
! 77: va_start(arg, fmt);
! 78: done = vasprintf(strp, fmt, arg);
! 79: va_end(arg);
! 80:
! 81: return(done);
! 82: }
! 83:
! 84: // vim: ts=4
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