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Implement printing out of expressions so that they can be output to the lease database file and later read back in.

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This commit is contained in:
Ted Lemon
1999-09-22 01:45:57 +00:00
parent fd10f7c61a
commit fa098be8f9
5 changed files with 620 additions and 7 deletions
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150
common/execute.c
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@@ -22,7 +22,7 @@
#ifndef lint
static char copyright[] =
"$Id: execute.c,v 1.18 1999/09/15 17:22:52 mellon Exp $ Copyright (c) 1998, 1999 The Internet Software Consortium. All rights reserved.\n";
"$Id: execute.c,v 1.19 1999/09/22 01:45:49 mellon Exp $ Copyright (c) 1998, 1999 The Internet Software Consortium. All rights reserved.\n";
#endif /* not lint */
#include "dhcpd.h"
@@ -308,3 +308,151 @@ int executable_statement_dereference (ptr, name)
*ptr = (struct executable_statement *)0;
return 1;
}
void write_statements (file, statements, indent)
FILE *file;
struct executable_statement *statements;
int indent;
{
struct executable_statement *r, *x;
int result;
int status;
char *s, *t, *dot;
int col;
if (!statements)
return;
for (r = statements; r; r = r -> next) {
switch (r -> op) {
case statements_statement:
write_statements (file, r -> data.statements, indent);
break;
case on_statement:
switch (r -> data.on.evtype) {
case expiry:
s = "expiry";
break;
case commit:
s = "commit";
break;
case release:
s = "release";
break;
default:
log_fatal ("unknown event type %d %s",
r -> data.on.evtype,
"in on statement.");
}
indent_spaces (file, indent);
fprintf (file, "on %s {", s);
write_statements (file, r -> data.on.statements,
indent + 2);
indent_spaces (file, indent);
fprintf (file, "}");
break;
case if_statement:
indent_spaces (file, indent);
fprintf (file, "if ");
x = r;
col = write_expression (file,
x -> data.ie.expr,
indent + 3, indent + 3);
else_if:
token_print_indent (file, col, indent, " ", "", "{");
write_statements (file, x -> data.ie.true, indent + 2);
if (x -> data.ie.false &&
x -> data.ie.false -> op == if_statement &&
!x -> data.ie.false -> next) {
indent_spaces (file, indent);
fprintf (file, "} elsif ");
x = x -> data.ie.false;
col = write_expression (file,
x -> data.ie.expr,
indent + 6,
indent + 6);
goto else_if;
}
if (x -> data.ie.false) {
indent_spaces (file, indent);
fprintf (file, "} else {");
write_statements (file, x -> data.ie.false,
indent + 2);
}
indent_spaces (file, indent);
fprintf (file, "}");
break;
case eval_statement:
indent_spaces (file, indent);
fprintf (file, "eval ");
col = write_expression (file, r -> data.eval,
indent + 5, indent + 5);
fprintf (file, ";");
break;
case add_statement:
indent_spaces (file, indent);
fprintf (file, "add \"%s\"", r -> data.add -> name);
break;
case break_statement:
indent_spaces (file, indent);
fprintf (file, "break;");
break;
case supersede_option_statement:
s = "supersede";
goto option_statement;
case default_option_statement:
s = "default";
goto option_statement;
case append_option_statement:
s = "append";
goto option_statement;
case prepend_option_statement:
s = "prepend";
option_statement:
/* Note: the reason we don't try to pretty print
the option here is that the format of the option
may change in dhcpd.conf, and then when this
statement was read back, it would cause a syntax
error. */
if (r -> data.option -> option -> universe ==
&dhcp_universe) {
t = (char *)0;
dot = "";
} else {
t = (r -> data.option -> option ->
universe -> name);
dot = ".";
}
indent_spaces (file, indent);
fprintf (file, "%s %s%s%s = ", s, t, dot,
r -> data.option -> option -> name);
col = (indent + strlen (s) + strlen (t) +
strlen (dot) + strlen (r -> data.option ->
option -> name) + 4);
if (r -> data.option -> expression)
write_expression
(file,
r -> data.option -> expression,
col, indent + 8);
else
token_indent_data_string
(file, col, indent + 8, "", "",
&r -> data.option -> data);
fprintf (file, ";"); /* XXX */
break;
default:
log_fatal ("bogus statement type %d\n", r -> op);
}
}
}