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90 lines
3.1 KiB
Groff
90 lines
3.1 KiB
Groff
.\"
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.TH curl_printf 3 "30 April 2004" "libcurl 7.12" "libcurl Manual"
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.SH NAME
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curl_maprintf, curl_mfprintf, curl_mprintf, curl_msnprintf, curl_msprintf
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curl_mvaprintf, curl_mvfprintf, curl_mvprintf, curl_mvsnprintf,
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curl_mvsprintf - formatted output conversion
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.SH SYNOPSIS
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.B #include <curl/mprintf.h>
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.sp
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.BI "int curl_mprintf(const char *" format ", ...);"
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.br
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.BI "int curl_mfprintf(FILE *" fd ", const char *" format ", ...);"
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.br
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.BI "int curl_msprintf(char *" buffer ", const char *" format ", ...);"
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.br
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.BI "int curl_msnprintf(char *" buffer ", size_t " maxlength ", const char *" format ", ...);"
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.br
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.BI "int curl_mvprintf(const char *" format ", va_list " args ");"
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.br
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.BI "int curl_mvfprintf(FILE *" fd ", const char *" format ", va_list " args ");"
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.br
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.BI "int curl_mvsprintf(char *" buffer ", const char *" format ", va_list " args ");"
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.br
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.BI "int curl_mvsnprintf(char *" buffer ", size_t " maxlength ", const char *" format ", va_list " args ");"
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.br
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.BI "char *curl_maprintf(const char *" format ", ...);"
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.br
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.BI "char *curl_mvaprintf(const char *" format ", va_list " args ");"
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.SH DESCRIPTION
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These are all functions that produce output according to a format string and
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given arguments. These are mostly clones of the well-known C-style functions
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and there will be no detailed explanation of all available formatting rules
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and usage here.
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See this table for notable exceptions.
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.RS
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.TP
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.B curl_mprintf()
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Normal printf() clone.
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.TP
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.B curl_mfprintf()
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Normal fprintf() clone.
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.TP
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.B curl_msprintf()
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Normal sprintf() clone.
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.TP
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.B curl_msnprintf()
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snprintf() clone. Many systems don't have this. It is just like \fBsprintf\fP
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but with an extra argument after the buffer that specifies the length of the
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target buffer.
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.TP
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.B curl_mvprintf()
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Normal vprintf() clone.
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.TP
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.B curl_mvfprintf()
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Normal vfprintf() clone.
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.TP
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.B curl_mvsprintf()
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Normal vsprintf() clone.
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.TP
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.B curl_mvsnprintf()
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vsnprintf() clone. Many systems don't have this. It is just like
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\fBvsprintf\fP but with an extra argument after the buffer that specifies the
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length of the target buffer.
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.TP
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.B curl_maprintf()
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Like printf() but returns the output string as a malloc()ed string. The
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returned string must be free()ed by the receiver.
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.TP
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.B curl_mvaprintf()
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Like curl_maprintf() but takes a va_list pointer argument instead of a
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variable amount of arguments.
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.RE
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To easily use all these cloned functions instead of the normal ones, #define
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_MPRINTF_REPLACE before you include the <curl/mprintf.h> file. Then all the
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normal names like printf, fprintf, sprintf etc will use the curl-functions
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instead.
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.SH AVAILABILITY
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These function will be removed from the public libcurl API in a near
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future. They will instead be made "available" by source code access only, and
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then as curlx_-prefixed functions. See lib/README.curlx for further details.
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.SH RETURN VALUE
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The \fBcurl_maprintf\fP and \fBcurl_mvaprintf\fP functions return a pointer to
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a newly allocated string, or NULL if it failed.
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All other functions return the number of characters they actually outputted.
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.SH "SEE ALSO"
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.BR printf "(3), " sprintf "(3), " fprintf "(3), " vprintf "(3) "
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