STRUNCSTR(3pub) C Programmer's Manual STRUNCSTR(3pub)NAME
struncstr - convert printable C string notation to a memory block
SYNOPSIS
#include <publib.h>
void struncstr(void *block, const char *str, size_t max);
DESCRIPTION
struncstr converts a C string literal to the memory block it describes by converting all escape sequences to single characters. See a C
reference manual or strcstr(3) for a description of the C string literal notation.
max is the maximum number of characters to store into the memory block.
SEE ALSO publib(3), strcstr(3)AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)
Publib C Programmer's Manual STRUNCSTR(3pub)
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STRCSTR(3pub) C Programmer's Manual STRCSTR(3pub)NAME
strcstr - convert memory block to printable C string notation
SYNOPSIS
#include <publib.h>
void strcstr(char *str, size_t max, const void *block, size_t n);
DESCRIPTION
strcstr converts the contents of an arbitrary memory block (which need not be a zero terminated string) into a printable notation using
normal C string literal syntax. This can be used for example to store potentially binary data in a file, or in debugging outputs.
All characters for which there is a simple shorthand escape sequence (', ", ?, , a, , f,
,
, , v) are stored using that nota-
tion. is stored as . All other non-printable characters are stored using a hexadecimal escape sequence. All other printable charac-
ters are stored as is.
The isprint(3) macro is used to determine whether a character is printable (i.e., whether it is printed as is, or using special notation).
Therefore, the output depends on the locale.
RETURN VALUE
strcstr returns nothing.
EXAMPLE
The following code dumps input to the standard output in a guaranteed (modulo locale bugs) printable format. It might be used for debug-
ging.
#include <stdio.h>
#include <publib.h>
int main(void) {
char line[512];
char cstr[512*(CHAR_BIT/4+1+2)+1]; /* +2 for x, +1 for ,
the rest to be able to
store the hex code for
512 chars. */
while (fgets(line, sizeof(line), stdin) != NULL) {
strcstr(cstr, sizeof(cstr), line, strlen(line));
printf("%s0, cstr);
}
return 0;
}
SEE ALSO publib(3), strins(3)AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)
Publib C Programmer's Manual STRCSTR(3pub)
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