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Diffstat (limited to 'secure/lib/libcrypto/man/buffer.3')
| -rw-r--r-- | secure/lib/libcrypto/man/buffer.3 | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/buffer.3 b/secure/lib/libcrypto/man/buffer.3 new file mode 100644 index 0000000..3dee989 --- /dev/null +++ b/secure/lib/libcrypto/man/buffer.3 @@ -0,0 +1,212 @@ +.\" Automatically generated by Pod::Man version 1.15 +.\" Thu May 9 13:18:59 2002 +.\" +.\" Standard preamble: +.\" ====================================================================== +.de Sh \" Subsection heading +.br +.if t .Sp +.ne 5 +.PP +\fB\\$1\fR +.PP +.. +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Ip \" List item +.br +.ie \\n(.$>=3 .ne \\$3 +.el .ne 3 +.IP "\\$1" \\$2 +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R + +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. | will give a +.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used +.\" to do unbreakable dashes and therefore won't be available. \*(C` and +.\" \*(C' expand to `' in nroff, nothing in troff, for use with C<> +.tr \(*W-|\(bv\*(Tr +.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' +.ie n \{\ +. ds -- \(*W- +. ds PI pi +. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch +. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch +. ds L" "" +. ds R" "" +. ds C` "" +. ds C' "" +'br\} +.el\{\ +. ds -- \|\(em\| +. ds PI \(*p +. ds L" `` +. ds R" '' +'br\} +.\" +.\" If the F register is turned on, we'll generate index entries on stderr +.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and +.\" index entries marked with X<> in POD. Of course, you'll have to process +.\" the output yourself in some meaningful fashion. +.if \nF \{\ +. de IX +. tm Index:\\$1\t\\n%\t"\\$2" +.. +. nr % 0 +. rr F +.\} +.\" +.\" For nroff, turn off justification. Always turn off hyphenation; it +.\" makes way too many mistakes in technical documents. +.hy 0 +.if n .na +.\" +.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). +.\" Fear. Run. Save yourself. No user-serviceable parts. +.bd B 3 +. \" fudge factors for nroff and troff +.if n \{\ +. ds #H 0 +. ds #V .8m +. ds #F .3m +. ds #[ \f1 +. ds #] \fP +.\} +.if t \{\ +. ds #H ((1u-(\\\\n(.fu%2u))*.13m) +. ds #V .6m +. ds #F 0 +. ds #[ \& +. ds #] \& +.\} +. \" simple accents for nroff and troff +.if n \{\ +. ds ' \& +. ds ` \& +. ds ^ \& +. ds , \& +. ds ~ ~ +. ds / +.\} +.if t \{\ +. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" +. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' +. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' +. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' +. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' +. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' +.\} +. \" troff and (daisy-wheel) nroff accents +.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' +.ds 8 \h'\*(#H'\(*b\h'-\*(#H' +.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] +.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' +.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' +.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] +.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] +.ds ae a\h'-(\w'a'u*4/10)'e +.ds Ae A\h'-(\w'A'u*4/10)'E +. \" corrections for vroff +.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' +.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' +. \" for low resolution devices (crt and lpr) +.if \n(.H>23 .if \n(.V>19 \ +\{\ +. ds : e +. ds 8 ss +. ds o a +. ds d- d\h'-1'\(ga +. ds D- D\h'-1'\(hy +. ds th \o'bp' +. ds Th \o'LP' +. ds ae ae +. ds Ae AE +.\} +.rm #[ #] #H #V #F C +.\" ====================================================================== +.\" +.IX Title "BUFFER 1" +.TH BUFFER 1 "perl v5.6.1" "2000-11-13" "User Contributed Perl Documentation" +.UC +.SH "NAME" +BUF_MEM_new, BUF_MEM_free, BUF_MEM_grow, BUF_strdup \- simple +character arrays structure +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/buffer.h> +.Ve +.Vb 1 +\& BUF_MEM *BUF_MEM_new(void); +.Ve +.Vb 1 +\& void BUF_MEM_free(BUF_MEM *a); +.Ve +.Vb 1 +\& int BUF_MEM_grow(BUF_MEM *str, int len); +.Ve +.Vb 1 +\& char * BUF_strdup(const char *str); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The buffer library handles simple character arrays. Buffers are used for +various purposes in the library, most notably memory BIOs. +.PP +The library uses the \s-1BUF_MEM\s0 structure defined in buffer.h: +.PP +.Vb 6 +\& typedef struct buf_mem_st +\& { +\& int length; /* current number of bytes */ +\& char *data; +\& int max; /* size of buffer */ +\& } BUF_MEM; +.Ve +\&\fBlength\fR is the current size of the buffer in bytes, \fBmax\fR is the amount of +memory allocated to the buffer. There are three functions which handle these +and one \*(L"miscellaneous\*(R" function. +.PP +\&\fIBUF_MEM_new()\fR allocates a new buffer of zero size. +.PP +\&\fIBUF_MEM_free()\fR frees up an already existing buffer. The data is zeroed +before freeing up in case the buffer contains sensitive data. +.PP +\&\fIBUF_MEM_grow()\fR changes the size of an already existing buffer to +\&\fBlen\fR. Any data already in the buffer is preserved if it increases in +size. +.PP +\&\fIBUF_strdup()\fR copies a null terminated string into a block of allocated +memory and returns a pointer to the allocated block. +Unlike the standard C library \fIstrdup()\fR this function uses \fIOPENSSL_malloc()\fR and so +should be used in preference to the standard library \fIstrdup()\fR because it can +be used for memory leak checking or replacing the \fImalloc()\fR function. +.PP +The memory allocated from \fIBUF_strdup()\fR should be freed up using the \fIOPENSSL_free()\fR +function. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIBUF_MEM_new()\fR returns the buffer or \s-1NULL\s0 on error. +.PP +\&\fIBUF_MEM_free()\fR has no return value. +.PP +\&\fIBUF_MEM_grow()\fR returns zero on error or the new size (i.e. \fBlen\fR). +.SH "SEE ALSO" +.IX Header "SEE ALSO" +bio(3) +.SH "HISTORY" +.IX Header "HISTORY" +\&\fIBUF_MEM_new()\fR, \fIBUF_MEM_free()\fR and \fIBUF_MEM_grow()\fR are available in all +versions of SSLeay and OpenSSL. \fIBUF_strdup()\fR was added in SSLeay 0.8. |
