enhanced curl_version_info

docs/libcurl/curl_version_info.3

@@ -0,0 +1,81 @@
+.\" You can view this file with:
+.\" nroff -man [file]
+.\" $Id$
+.\"
+.TH curl_version_info 3 "25 Sep 2002" "libcurl 7.10" "libcurl Manual"
+.SH NAME
+curl_version_info - returns run-time libcurl version info
+.SH SYNOPSIS
+.B #include <curl/curl.h>
+.sp
+.BI "curl_version_info_data *curl_version_info( );"
+.ad
+.SH DESCRIPTION
+Returns a pointer to a filled in struct with information about various
+run-time features in libcurl.
+
+Applications should use this information to judge if things are possible to do
+or not, instead of using compile-time checks, as dynamic/DLL libraries can be
+changed independent of applications.
+
+The curl_version_info_data struct looks like this
+
+.nf
+typedef struct {
+  const char *version;      /* human readable string */
+  unsigned int version_num; /* numeric representation */
+  const char *host;         /* human readable string */
+  int features;             /* bitmask, see below */
+  char *ssl_version;        /* human readable string */
+  long ssl_version_num;     /* number */
+  char *libz_version;       /* human readable string */
+  const char *protocols[];  /* list of protocols */
+} curl_version_info_data;
+.fi
+
+\fIversion\fP is just an ascii string for the libcurl version.
+
+\fIversion_num\fP is a 6 digit hexadecimal number created like this: <2 digits
+major number> | <2 digits minor number> | <2 digits patch number>. Version
+7.9.8 is therefore returned as 0x070908.
+
+\fIhost\fP is an ascii string showing what host information that this libcurl
+was built for. As discovered by a configure script or set by the build
+environment.
+
+\fIfeatures\fP can have none, one or more bits set, and the currently defined
+bits are:
+.TP 5.5
+.B CURL_VERSION_IPV6
+supports IPv6
+.TP
+.B CURL_VERSION_KERBEROS4
+supports kerberos4 (when using FTP)
+.TP
+.B CURL_VERSION_SSL
+supports SSL (HTTPS/FTPS)
+.TP
+.B CURL_VERSION_LIBZ
+supports HTTP deflate using libz
+.PP
+\fIssl_version\fP is an ascii string for the OpenSSL version used. If libcurl
+has no SSL support, this is NULL.
+
+\fIssl_version_num\fP is the numerical OpenSSL version value as defined by the
+OpenSSL project. If libcurl has no SSL support, this is 0.
+
+\fIlibz_version\fP is an ascii string (there is no numerical version). If
+libcurl has no libz support, this is NULL.
+
+\fIprotocols\fP is a pointer to an array of char * pointers, containing the
+names protocols that libcurl supports (using lowercase letters). The protocol
+names are the same as would be used in URLs. The array is terminated by a NULL
+entry.
+
+
+.SH RETURN VALUE
+A pointer to a curl_version_info_data struct.
+.SH "SEE ALSO"
+\fIcurl_version(3)\fP
+.SH BUGS
+No known bugs.