Rev 2 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | RSS feed
/*
Crown Copyright (c) 1997
This TenDRA(r) Computer Program is subject to Copyright
owned by the United Kingdom Secretary of State for Defence
acting through the Defence Evaluation and Research Agency
(DERA). It is made available to Recipients with a
royalty-free licence for its use, reproduction, transfer
to other parties and amendment for any purpose not excluding
product development provided that any such use et cetera
shall be deemed to be acceptance of the following conditions:-
(1) Its Recipients shall ensure that this Notice is
reproduced upon any copies or amended versions of it;
(2) Any amended version of it shall be clearly marked to
show both the nature of and the organisation responsible
for the relevant amendment or amendments;
(3) Its onward transfer from a recipient to another
party shall be deemed to be that party's acceptance of
these conditions;
(4) DERA gives no warranty or assurance as to its
quality or suitability for any purpose and DERA accepts
no liability whatsoever in relation to any use to which
it may be put.
*/
#include "config.h"
#include "calculus.h"
#include "cmd_ops.h"
#include "error.h"
#include "common.h"
#include "output.h"
#include "template.h"
#include "xalloc.h"
/*
GET A COMMAND FROM A STRING
This routine returns the address of the first non-white space character
from the string ps. It returns the null pointer if the end of the line
is reached.
*/
static char *get_command
PROTO_N ( ( ps ) )
PROTO_T ( char **ps )
{
char *t = *ps ;
char *s = t ;
if ( s ) {
char c ;
while ( c = *s, ( c == ' ' || c == '\t' || c == '\r' ) ) {
*s = 0 ;
s++ ;
}
if ( c == '#' || c == '\n' || c == 0 ) {
*s = 0 ;
*ps = NULL ;
return ( NULL ) ;
}
t = s ;
while ( c = *s, !( c == ' ' || c == '\t' || c == '\r' ||
c == '\n' || c == 0 ) ) {
s++ ;
}
*ps = s ;
}
return ( t ) ;
}
/*
READ A TEMPLATE FILE
This routine reads a template file from the file f.
*/
static COMMAND read_template
PROTO_N ( ( f, p ) )
PROTO_T ( FILE *f X COMMAND p )
{
int go = 1 ;
char buff [1000] ;
int ln1 = crt_line_no ;
LIST ( COMMAND ) q = NULL_list ( COMMAND ) ;
do {
COMMAND r = NULL_cmd ;
int ln2 = crt_line_no ;
char *s = fgets ( buff, 1000, f ) ;
if ( s == NULL ) {
/* End of file */
if ( IS_cmd_cond ( p ) ) {
error ( ERROR_SERIOUS, "End of '@if' expected" ) ;
} else if ( IS_cmd_loop ( p ) ) {
error ( ERROR_SERIOUS, "End of '@loop' expected" ) ;
}
break ;
}
s = xstrcpy ( s ) ;
if ( s [0] == '@' ) {
/* Complex command */
char *s1, *s2, *s3 ;
s++ ;
s1 = get_command ( &s ) ;
if ( s1 == NULL ) s1 = "<empty>" ;
s2 = get_command ( &s ) ;
s3 = get_command ( &s ) ;
if ( streq ( s1, "if" ) ) {
if ( s2 == NULL ) {
error ( ERROR_SERIOUS, "Incomplete '@%s' command", s1 ) ;
s2 = "true" ;
}
MAKE_cmd_cond ( ln2, s2, NULL_cmd, NULL_cmd, r ) ;
} else if ( streq ( s1, "else" ) ) {
if ( IS_cmd_cond ( p ) ) {
COMMAND v = DEREF_cmd ( cmd_cond_true_code ( p ) ) ;
if ( !IS_NULL_cmd ( v ) ) {
error ( ERROR_SERIOUS, "Duplicate '@%s' command", s1 ) ;
}
q = REVERSE_list ( q ) ;
MAKE_cmd_compound ( ln1, q, v ) ;
COPY_cmd ( cmd_cond_true_code ( p ), v ) ;
q = NULL_list ( COMMAND ) ;
ln1 = ln2 ;
} else {
error ( ERROR_SERIOUS, "Misplaced '@%s' command", s1 ) ;
}
s3 = s2 ;
} else if ( streq ( s1, "endif" ) ) {
if ( IS_cmd_cond ( p ) ) {
go = 0 ;
} else {
error ( ERROR_SERIOUS, "Misplaced '@%s' command", s1 ) ;
}
s3 = s2 ;
} else if ( streq ( s1, "loop" ) ) {
if ( s2 == NULL ) {
error ( ERROR_SERIOUS, "Incomplete '@%s' command", s1 ) ;
s2 = "false" ;
}
MAKE_cmd_loop ( ln2, s2, NULL_cmd, r ) ;
} else if ( streq ( s1, "end" ) ) {
if ( IS_cmd_loop ( p ) ) {
go = 0 ;
} else {
error ( ERROR_SERIOUS, "Misplaced '@%s' command", s1 ) ;
}
s3 = s2 ;
} else if ( streq ( s1, "comment" ) ) {
s3 = NULL ;
} else {
error ( ERROR_SERIOUS, "Unknown command, '@%s'", s1 ) ;
s3 = NULL ;
}
if ( s3 ) {
error ( ERROR_SERIOUS, "End of '@%s' expected", s1 ) ;
}
crt_line_no = ln2 + 1 ;
if ( !IS_NULL_cmd ( r ) ) {
/* Read body of command */
COMMAND u = read_template ( f, r ) ;
if ( IS_cmd_cond ( r ) ) {
COMMAND v = DEREF_cmd ( cmd_cond_true_code ( r ) ) ;
if ( IS_NULL_cmd ( v ) ) {
COPY_cmd ( cmd_cond_true_code ( r ), u ) ;
} else {
COPY_cmd ( cmd_cond_false_code ( r ), u ) ;
}
} else if ( IS_cmd_loop ( r ) ) {
COPY_cmd ( cmd_loop_body ( r ), u ) ;
}
CONS_cmd ( r, q, q ) ;
}
} else {
/* Simple command */
MAKE_cmd_simple ( ln2, s, r ) ;
CONS_cmd ( r, q, q ) ;
crt_line_no = ln2 + 1 ;
}
} while ( go ) ;
q = REVERSE_list ( q ) ;
MAKE_cmd_compound ( ln1, q, p ) ;
return ( p ) ;
}
/*
TOKEN CONDITION
This variable gives the value of the token condition.
*/
int token_cond = 0 ;
/*
EVALUATE A CONDITION
This routine evaluates the condition s.
*/
static int eval_cond
PROTO_N ( ( s ) )
PROTO_T ( char *s )
{
if ( s [0] == '!' ) {
/* Negate condition */
return ( !eval_cond ( s + 1 ) ) ;
}
if ( streq ( s, "comp.complex" ) ) {
/* Complex component type */
if ( HAVE_COMPONENT ) {
TYPE_P_P pt = cmp_type ( CRT_COMPONENT ) ;
TYPE_P t = DEREF_ptr ( pt ) ;
return ( is_complex_type ( t ) ) ;
}
return ( 0 ) ;
}
if ( streq ( s, "comp.default" ) ) {
/* Component default value */
if ( HAVE_COMPONENT ) {
string_P pv = cmp_name ( CRT_COMPONENT ) ;
string v = DEREF_string ( pv ) ;
if ( v ) return ( 1 ) ;
}
return ( 0 ) ;
}
if ( streq ( s, "token" ) ) return ( token_cond ) ;
if ( streq ( s, "true" ) ) return ( 1 ) ;
if ( streq ( s, "false" ) ) return ( 0 ) ;
error ( ERROR_SERIOUS, "Unknown condition, '%s'", s ) ;
return ( 0 ) ;
}
/*
WRITE A TEMPLATE FILE
This routine writes the template file given by the commands cmd.
*/
static void write_template
PROTO_N ( ( cmd ) )
PROTO_T ( COMMAND cmd )
{
if ( !IS_NULL_cmd ( cmd ) ) {
crt_line_no = DEREF_int ( cmd_line ( cmd ) ) ;
switch ( TAG_cmd ( cmd ) ) {
case cmd_simple_tag : {
string s = DEREF_string ( cmd_simple_text ( cmd ) ) ;
output ( s ) ;
break ;
}
case cmd_compound_tag : {
LIST ( COMMAND ) p ;
p = DEREF_list ( cmd_compound_seq ( cmd ) ) ;
while ( !IS_NULL_list ( p ) ) {
COMMAND a = DEREF_cmd ( HEAD_list ( p ) ) ;
write_template ( a ) ;
p = TAIL_list ( p ) ;
}
break ;
}
case cmd_loop_tag : {
string s = DEREF_string ( cmd_loop_control ( cmd ) ) ;
COMMAND a = DEREF_cmd ( cmd_loop_body ( cmd ) ) ;
if ( streq ( s, "enum" ) ) {
LOOP_ENUM write_template ( a ) ;
} else if ( streq ( s, "enum.const" ) ) {
if ( HAVE_ENUM ) {
LOOP_ENUM_CONST write_template ( a ) ;
}
} else if ( streq ( s, "identity" ) ) {
LOOP_IDENTITY write_template ( a ) ;
} else if ( streq ( s, "primitive" ) ) {
LOOP_PRIMITIVE write_template ( a ) ;
} else if ( streq ( s, "struct" ) ) {
LOOP_STRUCTURE write_template ( a ) ;
} else if ( streq ( s, "struct.comp" ) ) {
if ( HAVE_STRUCTURE ) {
LOOP_STRUCTURE_COMPONENT write_template ( a ) ;
}
} else if ( streq ( s, "union" ) ) {
LOOP_UNION write_template ( a ) ;
} else if ( streq ( s, "union.comp" ) ) {
if ( HAVE_UNION ) {
LOOP_UNION_COMPONENT write_template ( a ) ;
}
} else if ( streq ( s, "union.field" ) ) {
if ( HAVE_UNION ) {
LOOP_UNION_FIELD write_template ( a ) ;
}
} else if ( streq ( s, "union.field.comp" ) ) {
if ( HAVE_UNION && HAVE_FIELD ) {
LOOP_FIELD_COMPONENT write_template ( a ) ;
}
} else if ( streq ( s, "union.map" ) ) {
if ( HAVE_UNION ) {
LOOP_UNION_MAP write_template ( a ) ;
}
} else if ( streq ( s, "union.map.arg" ) ) {
if ( HAVE_UNION && HAVE_MAP ) {
LOOP_MAP_ARGUMENT write_template ( a ) ;
}
} else {
error ( ERROR_SERIOUS, "Unknown control, '%s'", s ) ;
}
break ;
}
case cmd_cond_tag : {
string s = DEREF_string ( cmd_cond_control ( cmd ) ) ;
COMMAND a = DEREF_cmd ( cmd_cond_true_code ( cmd ) ) ;
COMMAND b = DEREF_cmd ( cmd_cond_false_code ( cmd ) ) ;
if ( eval_cond ( s ) ) {
write_template ( a ) ;
} else {
write_template ( b ) ;
}
break ;
}
}
}
return ;
}
/*
PROCESS A TEMPLATE FILE
This routine processes the template file in to the output file out.
*/
void template_file
PROTO_N ( ( in, out ) )
PROTO_T ( char *in X char *out )
{
COMMAND cmd ;
FILE *input_file ;
crt_line_no = 1 ;
crt_file_name = in ;
input_file = fopen ( in, "r" ) ;
if ( input_file == NULL ) {
error ( ERROR_SERIOUS, "Can't open template file, '%s'", in ) ;
return ;
}
MAKE_cmd_simple ( 1, "<dummy>", cmd ) ;
cmd = read_template ( input_file, cmd ) ;
fclose_v ( input_file ) ;
if ( streq ( out, "." ) ) {
output_file = stdout ;
} else {
output_file = fopen ( out, "w" ) ;
if ( output_file == NULL ) {
error ( ERROR_SERIOUS, "Can't open output file, '%s'", out ) ;
return ;
}
}
have_varargs = 0 ;
write_template ( cmd ) ;
have_varargs = 1 ;
flush_output () ;
if ( output_file != stdout ) fclose_v ( output_file ) ;
return ;
}