Annotation of rpl/src/asprintf.c, revision 1.36
1.1 bertrand 1: /*
2: ================================================================================
1.36 ! bertrand 3: RPL/2 (R) version 4.1.9
1.32 bertrand 4: Copyright (C) 1989-2012 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"
24:
1.1 bertrand 25:
26: int
1.2 bertrand 27: valsprintf(unsigned char **strp, const char *fmt, va_list ap)
1.1 bertrand 28: {
1.3 bertrand 29: size_t bs;
30: size_t s;
1.5 bertrand 31:
1.3 bertrand 32: unsigned char *b = NULL;
1.1 bertrand 33:
1.5 bertrand 34: va_list cap;
35:
1.3 bertrand 36: for(bs = 1024;; bs *= 2)
1.1 bertrand 37: {
1.5 bertrand 38: va_copy(cap, ap);
39:
1.3 bertrand 40: if (b != NULL)
41: {
42: free(b);
43: }
44:
1.5 bertrand 45: if ((b = malloc(sizeof(*b) * bs)) == NULL)
1.3 bertrand 46: {
47: return -1;
48: }
49:
1.5 bertrand 50: if (((int) (s = vsnprintf(b, bs, fmt, cap))) < 0)
1.3 bertrand 51: {
52: free(b);
53: return -1;
54: }
55:
1.5 bertrand 56: if (s < bs)
1.3 bertrand 57: {
58: break;
59: }
1.1 bertrand 60: }
61:
1.3 bertrand 62: if (((*strp) = realloc(b, ((s = strlen(b)) + 1) * sizeof(*b))) == NULL)
1.1 bertrand 63: {
64: free(b);
65: return -1;
66: }
67:
1.3 bertrand 68: return s;
1.1 bertrand 69: }
70:
71:
72: int
1.2 bertrand 73: alsprintf(unsigned char **strp, const char *fmt, ...)
1.1 bertrand 74: {
1.3 bertrand 75: int done;
76: va_list arg;
1.1 bertrand 77:
1.3 bertrand 78: va_start(arg, fmt);
79: done = valsprintf(strp, fmt, arg);
80: va_end(arg);
1.1 bertrand 81:
1.3 bertrand 82: return(done);
1.1 bertrand 83: }
84:
85: // vim: ts=4
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