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/*
* getwordx public domain library v.2.0
* (c) 1995,1996,1997 <maloff@tts.magadan.su>
*/
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <sys/types.h>
#include <stddef.h>
#include "Config.h"
#include "sys.h"
#include "tools.h"
char *getwordx2 (const char *src, int n, int flags, char *fldsep, char *fldskip)
{
char *dest;
char quoted = 0;
int i;
if (!src) return NULL;
dest = xstrdup(src);
while (1)
{
while (*src && strchr (fldskip, *src))
++src;
if (!*src || ((flags & GWX_HASH) && *src == '#'))
{
free (dest);
return NULL;
}
for (i = 0;; ++i, ++src)
{
if ((flags & GWX_NOESC) == 0 && *src == '\\')
{
int base = 8, ch = 0;
++src;
if (!isdigit (*src) && *src != 'x' && *src != 'X')
{
switch (*src)
{
case 'a': /* bell */
ch = '\a';
break;
case 'b': /* bksp */
ch = '\b';
break;
case 'f': /* ff */
ch = '\f';
break;
case 'n': /* lf */
ch = '\n';
break;
case 'r': /* cr */
ch = '\r';
break;
case 't': /* tab */
ch = '\t';
break;
case 'E': /* ESC */
ch = 0033;
break;
default:
ch = *src;
break;
}
++src;
}
else
{
if (toupper (*src) == 'X')
{
++src;
base = 16;
}
for (; isxdigit (*src); ++src)
{
if (isdigit (*src))
ch = ch * base + *src - '0';
else if (base == 16)
ch = ch * base + tolower (*src) - 'a' + 0xa;
else
break;
}
}
dest[i] = (char) ch;
--src;
}
else if (!*src || *src == '\n' || *src == '\r')
break;
else if (*src == '\"')
{
quoted = ~quoted;
i--;
}
else if (strchr (fldsep, *src) && !quoted)
break;
else if (*src == '%' && (flags & GWX_SUBST))
{
++src;
if (*src == '%')
{
dest[i] = '%';
}
else
{
char varname[MAX_ENV_VAR_NAME + 1];
char *var;
unsigned k;
for (k = 0; k < sizeof (varname) &&
!isspace (*src) &&
*src != '%'; ++k)
varname[k] = toupper (src++[0]);
varname[k] = 0;
if ((var = getenv (varname)) == 0)
var = "";
dest = xrealloc (dest, strlen (src) + strlen (var) + 1);
strcpy (dest + i, var);
i += strlen (var) - 1;
}
}
else
dest[i] = *src;
}
if (--n == 0)
{
dest[i] = 0;
return dest;
}
if (*src && strchr (fldsep, *src))
++src;
}
}
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