| #ifndef _CAREFUULPUTC_H |
| #define _CAREFUULPUTC_H |
| |
| /* putc() for use in write and wall (that sometimes are sgid tty) */ |
| /* Avoid control characters in our locale, and also ASCII control characters. |
| Note that the locale of the recipient is unknown. */ |
| #include <stdio.h> |
| #include <ctype.h> |
| |
| #define iso8859x_iscntrl(c) \ |
| (((c) & 0x7f) < 0x20 || (c) == 0x7f) |
| |
| static inline int carefulputc(int c, FILE *fp) { |
| 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('^', fp); |
| if (ret != EOF) |
| ret = putc(c^0x40, fp); |
| } |
| return (ret < 0) ? EOF : 0; |
| } |
| |
| #endif /* _CAREFUULPUTC_H */ |
