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author | Ingo Schwarze <schwarze@openbsd.org> | 2015-03-19 14:57:29 +0000 |
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committer | Ingo Schwarze <schwarze@openbsd.org> | 2015-03-19 14:57:29 +0000 |
commit | 7ca732f0714b3bdace7b2642923a7a0f4919e2d2 (patch) | |
tree | 8d66dea3252ded4b8c1e6013dc2e6da90a2e01b8 /compat_vasprintf.c | |
parent | 848d9655dd5206e4226d27ca67bb9160d22fbc01 (diff) | |
download | mandoc-7ca732f0714b3bdace7b2642923a7a0f4919e2d2.tar.gz mandoc-7ca732f0714b3bdace7b2642923a7a0f4919e2d2.tar.zst mandoc-7ca732f0714b3bdace7b2642923a7a0f4919e2d2.zip |
Compat glue needed for Solaris 9 and 10.
Thanks to Sevan Janiyan <venture37 at geeklan dot co dot uk> for
reporting the Solaris 10 issues, to Jan Holzhueter <jh at opencsw
dot org> for some additional insight, and to OpenCSW in general for
providing me with a Solaris 9/10/11 testing environment.
Diffstat (limited to 'compat_vasprintf.c')
-rw-r--r-- | compat_vasprintf.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/compat_vasprintf.c b/compat_vasprintf.c new file mode 100644 index 00000000..9524bc04 --- /dev/null +++ b/compat_vasprintf.c @@ -0,0 +1,52 @@ +#include "config.h" + +#if HAVE_VASPRINTF + +int dummy; + +#else + +/* $Id: compat_vasprintf.c,v 1.1 2015/03/19 14:57:29 schwarze Exp $ */ +/* + * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * This fallback implementation is not efficient: + * It does the formatting twice. + * Short of fiddling with the unknown internals of the system's + * printf(3) or completely reimplementing printf(3), i can't think + * of another portable solution. + */ + +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> + +int +vasprintf(char **ret, const char *format, va_list ap) +{ + char buf[2]; + int sz; + + if ((sz = vsnprintf(buf, sizeof(buf), format, ap)) != -1 && + (*ret = malloc(sz + 1)) != NULL) { + if (vsnprintf(*ret, sz + 1, format, ap) == sz) + return(sz); + free(*ret); + } + *ret = NULL; + return(-1); +} + +#endif |