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/* escape.c
Translate escape sequences. */
#include "uucp.h"
#include <ctype.h>
#include "uudefs.h"
size_t
cescape (z)
char *z;
{
char *zto, *zfrom;
zto = z;
zfrom = z;
while (*zfrom != '\0')
{
if (*zfrom != '\\')
{
*zto++ = *zfrom++;
continue;
}
++zfrom;
switch (*zfrom)
{
case '-':
*zto++ = '-';
break;
case 'b':
*zto++ = '\b';
break;
case 'n':
*zto++ = '\n';
break;
case 'N':
*zto++ = '\0';
break;
case 'r':
*zto++ = '\r';
break;
case 's':
*zto++ = ' ';
break;
case 't':
*zto++ = '\t';
break;
case '\0':
--zfrom;
/* Fall through. */
case '\\':
*zto++ = '\\';
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
int i;
i = *zfrom - '0';
if (zfrom[1] >= '0' && zfrom[1] <= '7')
i = 8 * i + *++zfrom - '0';
if (zfrom[1] >= '0' && zfrom[1] <= '7')
i = 8 * i + *++zfrom - '0';
*zto++ = (char) i;
}
break;
case 'x':
{
int i;
i = 0;
while (isxdigit (BUCHAR (zfrom[1])))
{
if (isdigit (BUCHAR (zfrom[1])))
i = 16 * i + *++zfrom - '0';
else if (isupper (BUCHAR (zfrom[1])))
i = 16 * i + *++zfrom - 'A' + 10;
else
i = 16 * i + *++zfrom - 'a' + 10;
}
*zto++ = (char) i;
}
break;
default:
ulog (LOG_ERROR, "Unrecognized escape sequence \\%c",
*zfrom);
*zto++ = *zfrom;
break;
}
++zfrom;
}
*zto = '\0';
return (size_t) (zto - z);
}
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