#ifndef UTIL_LINUX_CAREFUULPUTC_H
#define UTIL_LINUX_CAREFUULPUTC_H
/*
* A putc() for use in write and wall (that sometimes are sgid tty).
* It avoids control characters in our locale, and also ASCII control
* characters. Note that the locale of the recipient is unknown.
*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#define iso8859x_iscntrl(c) \
(((c) & 0x7f) < 0x20 || (c) == 0x7f)
static inline int fputc_careful(int c, FILE *fp, const char fail) {
int ret;
if (c == '\007' || c == '\t' || c == '\r' || c == '\n' ||
(!iso8859x_iscntrl(c) && (isprint(c) || isspace(c))))
ret = putc(c, fp);
else if ((c & 0x80) || !isprint(c^0x40))
ret = fprintf(fp, "\\%3o", (unsigned char) c);
else {
ret = putc(fail, fp);
if (ret != EOF)
ret = putc(c^0x40, fp);
}
return (ret < 0) ? EOF : 0;
}
static inline void fputs_quoted(const char *data, FILE *out)
{
const char *p;
fputc('"', out);
for (p = data; p && *p; p++) {
if ((unsigned char) *p == 0x22 || /* " */
(unsigned char) *p == 0x5c || /* \ */
!isprint((unsigned char) *p) ||
iscntrl((unsigned char) *p)) {
fprintf(out, "\\x%02x", (unsigned char) *p);
} else
fputc(*p, out);
}
fputc('"', out);
}
static inline void fputs_nonblank(const char *data, FILE *out)
{
const char *p;
for (p = data; p && *p; p++) {
if (isblank((unsigned char) *p) ||
(unsigned char) *p == 0x5c || /* \ */
!isprint((unsigned char) *p) ||
iscntrl((unsigned char) *p)) {
fprintf(out, "\\x%02x", (unsigned char) *p);
} else
fputc(*p, out);
}
}
#endif /* _CAREFUULPUTC_H */
