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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include "environ.h"
# ENV_FIRST -- Return a pointer to the first (most recently entered) entry
# in the environment list. A pointer to the string definition of the entry
# is returned as the output argument.
pointer procedure env_first (valp)
pointer valp # pointer to environment string
pointer el
include "environ.com"
begin
el = envbuf + last
if (el > envbuf) {
valp = E_SETP(el)
return (el)
} else
return (NULL)
end
# ENV_NEXT -- Return a pointer to the next element in the environment list.
# A pointer to the string value of the element is returned as the output
# argument.
pointer procedure env_next (last_el, valp, show_redefines)
pointer last_el # pointer to last element returned
pointer valp # receives charp of next element define string
int show_redefines # do not skip redefined elements
pointer el
include "environ.com"
begin
el = envbuf + E_LASTELEM(last_el)
while (el > envbuf) {
if (E_REDEF(el) == NO || show_redefines == YES)
break
else
el = envbuf + E_LASTELEM(el)
}
if (el > envbuf) {
valp = E_SETP(el)
return (el)
} else
return (NULL)
end
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