isencrypt(3GEN) String Pattern-Matching Library Functions isencrypt(3GEN)NAME
isencrypt - determine whether a buffer of characters is encrypted
SYNOPSIS
cc [flag]... [file]... -lgen [library]...
#include<libgen.h>
int isencrypt(const char *fbuf, size_t ninbuf);
DESCRIPTION
isencrypt() uses heuristics to determine whether a buffer of characters is encrypted. It requires two arguments: a pointer to an array of
characters and the number of characters in the buffer.
isencrypt() assumes that the file is not encrypted if all the characters in the first block are ASCII characters. If there are non-ASCII
characters in the first ninbuf characters, and if the setlocale() LC_CTYPE category is set to C or ascii, isencrypt() assumes that the buf-
fer is encrypted
If the LC_CTYPE category is set to a value other than C or ascii, then isencrypt() uses a combination of heuristics to determine if the
buffer is encrypted. If ninbuf has at least 64 characters, a chi-square test is used to determine if the bytes in the buffer have a uniform
distribution; if it does, then isencrypt() assumes the buffer is encrypted. If the buffer has less than 64 characters, a check is made for
null characters and a terminating new-line to determine whether the buffer is encrypted.
RETURN VALUES
If the buffer is encrypted, 1 is returned; otherwise, zero is returned.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO setlocale(3C), attributes(5)NOTES
When compiling multithreaded applications, the _REENTRANT flag must be defined on the compile line. This flag should only be used in mul-
tithreaded applications.
SunOS 5.11 29 Dec 1996 isencrypt(3GEN)
Check Out this Related Man Page
strccpy(3GEN) String Pattern-Matching Library Functions strccpy(3GEN)NAME
strccpy, streadd, strcadd, strecpy - copy strings, compressing or expanding escape codes
SYNOPSIS
cc [ flag ... ] file ... -lgen [ library ... ]
#include <libgen.h>
char *strccpy(char *output, const char *input);
char *strcadd(char *output, const char *input);
char *strecpy(char *output, const char *input, const char *exceptions);
char *streadd(char *output, const char *input, const char *exceptions);
DESCRIPTION
strccpy() copies the input string, up to a null byte, to the output string, compressing the C-language escape sequences (for example,
,
01) to the equivalent character. A null byte is appended to the output. The output argument must point to a space big enough to accommo-
date the result. If it is as big as the space pointed to by input it is guaranteed to be big enough. strccpy() returns the output argument.
strcadd() is identical to strccpy(), except that it returns the pointer to the null byte that terminates the output.
strecpy() copies the input string, up to a null byte, to the output string, expanding non-graphic characters to their equivalent C-language
escape sequences (for example,
, 01). The output argument must point to a space big enough to accommodate the result; four times the
space pointed to by input is guaranteed to be big enough (each character could become and 3 digits). Characters in the exceptions string
are not expanded. The exceptions argument may be zero, meaning all non-graphic characters are expanded. strecpy() returns the
output argument.
streadd() is identical to strecpy(), except that it returns the pointer to the null byte that terminates the output.
EXAMPLES
Example 1: Example of expanding and compressing escape codes.
/* expand all but newline and tab */
strecpy( output, input, "
" );
/* concatenate and compress several strings */
cp = strcadd( output, input1 );
cp = strcadd( cp, input2 );
cp = strcadd( cp, input3 );
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO string(3C), strfind(3GEN), attributes(5)NOTES
When compiling multi-thread applications, the _REENTRANT flag must be defined on the compile line. This flag should only be used in multi-
thread applications.
SunOS 5.10 29 Dec 1996 strccpy(3GEN)