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Diffstat (limited to 'src/libfreeswan/ttoul.3')
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diff --git a/src/libfreeswan/ttoul.3 b/src/libfreeswan/ttoul.3 deleted file mode 100644 index ffd9fb38a..000000000 --- a/src/libfreeswan/ttoul.3 +++ /dev/null @@ -1,191 +0,0 @@ -.TH IPSEC_TTOUL 3 "16 Aug 2000" -.SH NAME -ipsec ttoul, ultot \- convert unsigned-long numbers to and from text -.SH SYNOPSIS -.B "#include <freeswan.h> -.sp -.B "const char *ttoul(const char *src, size_t srclen," -.ti +1c -.B "int base, unsigned long *n);" -.br -.B "size_t ultot(unsigned long n, int format, char *dst," -.ti +1c -.B "size_t dstlen);" -.SH DESCRIPTION -.I Ttoul -converts a text-string number into a binary -.B "unsigned long" -value. -.I Ultot -does the reverse conversion, back to a text version. -.PP -Numbers are specified in text as -decimal (e.g. -.BR 123 ), -octal with a leading zero (e.g. -.BR 012 , -which has value 10), -or hexadecimal with a leading -.B 0x -(e.g. -.BR 0x1f , -which has value 31) -in either upper or lower case. -.PP -The -.I srclen -parameter of -.I ttoul -specifies the length of the string pointed to by -.IR src ; -it is an error for there to be anything else -(e.g., a terminating NUL) within that length. -As a convenience for cases where an entire NUL-terminated string is -to be converted, -a -.I srclen -value of -.B 0 -is taken to mean -.BR strlen(src) . -.PP -The -.I base -parameter of -.I ttoul -can be -.BR 8 , -.BR 10 , -or -.BR 16 , -in which case the number supplied is assumed to be of that form -(and in the case of -.BR 16 , -to lack any -.B 0x -prefix). -It can also be -.BR 0 , -in which case the number is examined for a leading zero -or a leading -.B 0x -to determine its base. -.PP -The -.I dstlen -parameter of -.I ultot -specifies the size of the -.I dst -parameter; -under no circumstances are more than -.I dstlen -bytes written to -.IR dst . -A result which will not fit is truncated. -.I Dstlen -can be zero, in which case -.I dst -need not be valid and no result is written, -but the return value is unaffected; -in all other cases, the (possibly truncated) result is NUL-terminated. -The -.I freeswan.h -header file defines a constant, -.BR ULTOT_BUF , -which is the size of a buffer just large enough for worst-case results. -.PP -The -.I format -parameter of -.I ultot -must be one of: -.RS -.IP \fB'o'\fR 4 -octal conversion with leading -.B 0 -.IP \fB\ 8\fR -octal conversion with no leading -.B 0 -.IP \fB'd'\fR -decimal conversion -.IP \fB10\fR -same as -.B d -.IP \fB'x'\fR -hexadecimal conversion, including leading -.B 0x -.IP \fB16\fR -hexadecimal conversion with no leading -.B 0x -.IP \fB17\fR -like -.B 16 -except padded on left with -.BR 0 s -to eight digits (full width of a 32-bit number) -.RE -.PP -.I Ttoul -returns NULL for success and -a pointer to a string-literal error message for failure; -see DIAGNOSTICS. -.I Ultot -returns -.B 0 -for a failure, and otherwise -returns the size of buffer which would -be needed to -accommodate the full conversion result, including terminating NUL -(it is the caller's responsibility to check this against the size of -the provided buffer to determine whether truncation has occurred). -.SH SEE ALSO -atol(3), strtoul(3) -.SH DIAGNOSTICS -Fatal errors in -.I ttoul -are: -empty input; -unknown -.IR base ; -non-digit character found; -number too large for an -.BR "unsigned long" . -.PP -Fatal errors in -.I ultot -are: -unknown -.IR format . -.SH HISTORY -Written for the FreeS/WAN project by Henry Spencer. -.SH BUGS -Conversion of -.B 0 -with format -.B o -yields -.BR 00 . -.PP -.I Ultot -format -.B 17 -is a bit of a kludge. -.PP -The restriction of error reports to literal strings -(so that callers don't need to worry about freeing them or copying them) -does limit the precision of error reporting. -.PP -The error-reporting convention lends itself to slightly obscure code, -because many readers will not think of NULL as signifying success. -A good way to make it clearer is to write something like: -.PP -.RS -.nf -.B "const char *error;" -.sp -.B "error = ttoul( /* ... */ );" -.B "if (error != NULL) {" -.B " /* something went wrong */" -.fi -.RE |