1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/*
* getenv - f77 subroutine to return environment variables
*
* called by:
* call getenv (ENV_NAME, char_var)
* where:
* ENV_NAME is the name of an environment variable
* char_var is a character variable which will receive
* the current value of ENV_NAME, or all blanks
* if ENV_NAME is not defined
*/
#include <stdlib.h>
#include "f2c.h"
/* extern char **environ; */
#ifdef KR_headers
VOID getenv_(fname, value, flen, vlen) char *value, *fname; ftnlen vlen, flen;
#else
void getenv_(char *fname, char *value, ftnlen flen, ftnlen vlen)
#endif
{
register char *ep, *fp, *flast;
register char **env = environ;
flast = fname + flen;
for(fp = fname ; fp < flast ; ++fp)
if(*fp == ' ')
{
flast = fp;
break;
}
while ( (ep = *env++))
{
for(fp = fname; fp<flast ; )
if(*fp++ != *ep++)
goto endloop;
if(*ep++ == '=') { /* copy right hand side */
while( *ep && --vlen>=0 )
*value++ = *ep++;
goto blank;
}
endloop: ;
}
blank:
while( --vlen >= 0 )
*value++ = ' ';
}
|
