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57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
#include "f2c.h"
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#undef abs
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#ifdef KR_headers
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extern char *F77_aloc(), *getenv();
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#else
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#include <stdlib.h>
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#include <string.h>
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extern char *F77_aloc(ftnlen, char*);
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#endif
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/*
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* getenv - f77 subroutine to return environment variables
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*
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* called by:
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* call getenv (ENV_NAME, char_var)
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* where:
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* ENV_NAME is the name of an environment variable
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* char_var is a character variable which will receive
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* the current value of ENV_NAME, or all blanks
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* if ENV_NAME is not defined
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*/
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#ifdef KR_headers
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VOID
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G77_getenv_0 (fname, value, flen, vlen) char *value, *fname; ftnlen vlen, flen;
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#else
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void
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G77_getenv_0 (char *fname, char *value, ftnlen flen, ftnlen vlen)
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#endif
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{
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char buf[256], *ep, *fp;
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integer i;
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if (flen <= 0)
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goto add_blanks;
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for(i = 0; i < sizeof(buf); i++) {
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if (i == flen || (buf[i] = fname[i]) == ' ') {
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buf[i] = 0;
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ep = getenv(buf);
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goto have_ep;
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}
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}
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while(i < flen && fname[i] != ' ')
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i++;
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strncpy(fp = F77_aloc(i+1, "getenv_"), fname, (int)i);
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fp[i] = 0;
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ep = getenv(fp);
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free(fp);
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have_ep:
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if (ep)
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while(*ep && vlen-- > 0)
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*value++ = *ep++;
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add_blanks:
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while(vlen-- > 0)
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*value++ = ' ';
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}
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