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heimdal/lib/sl/slc-gram.y
Love Hörnquist Åstrand ab59af8c86 fix a merge error 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@15436 ec53bebd-3082-4978-b11e-865c3cabbd6b
2005-06-16 19:55:03 +00:00

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%{
/*
* Copyright (c) 2004 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
RCSID("$Id$");
#endif
#include <stdio.h>
#include <stdlib.h>
#include <err.h>
#include <ctype.h>
#include <limits.h>
#include <getarg.h>
#include <vers.h>
#include <roken.h>
#include "slc.h"
extern FILE *yyin;
extern struct assignment *assignment;
%}
%union {
char *string;
struct assignment *assignment;
}
%token <string> LITERAL
%token <string> STRING
%type <assignment> assignment assignments
%start start
%%
start : assignments
{
assignment = $1;
}
;
assignments : assignment assignments
{
$1->next = $2;
$$ = $1;
}
| assignment
;
assignment : LITERAL '=' STRING
{
$$ = malloc(sizeof(*$$));
$$->name = $1;
$$->type = a_value;
$$->lineno = lineno;
$$->u.value = $3;
$$->next = NULL;
}
| LITERAL '=' '{' assignments '}'
{
$$ = malloc(sizeof(*$$));
$$->name = $1;
$$->type = a_assignment;
$$->lineno = lineno;
$$->u.assignment = $4;
$$->next = NULL;
}
;
%%
char *filename;
FILE *cfile, *hfile;
int error_flag;
struct assignment *assignment;
static void
ex(struct assignment *a, const char *fmt, ...)
{
va_list ap;
fprintf(stderr, "%s:%d: ", a->name, a->lineno);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
}
static int
check_option(struct assignment *as)
{
struct assignment *a;
int seen_long = 0;
int seen_short = 0;
int seen_type = 0;
int seen_argument = 0;
int seen_help = 0;
int seen_default = 0;
int ret = 0;
for(a = as; a != NULL; a = a->next) {
if(strcmp(a->name, "long") == 0)
seen_long++;
else if(strcmp(a->name, "short") == 0)
seen_short++;
else if(strcmp(a->name, "type") == 0)
seen_type++;
else if(strcmp(a->name, "argument") == 0)
seen_argument++;
else if(strcmp(a->name, "help") == 0)
seen_help++;
else if(strcmp(a->name, "default") == 0)
seen_default++;
else {
ex(a, "unknown name");
ret++;
}
}
if(seen_long == 0 && seen_short == 0) {
ex(as, "neither long nor short option");
ret++;
}
if(seen_long > 1) {
ex(as, "multiple long options");
ret++;
}
if(seen_short > 1) {
ex(as, "multiple short options");
ret++;
}
if(seen_type > 1) {
ex(as, "multiple types");
ret++;
}
if(seen_argument > 1) {
ex(as, "multiple arguments");
ret++;
}
if(seen_help > 1) {
ex(as, "multiple help strings");
ret++;
}
if(seen_default > 1) {
ex(as, "multiple default values");
ret++;
}
return ret;
}
static int
check_command(struct assignment *as)
{
struct assignment *a;
int seen_name = 0;
int seen_function = 0;
int seen_help = 0;
int seen_argument = 0;
int seen_minargs = 0;
int seen_maxargs = 0;
int ret = 0;
for(a = as; a != NULL; a = a->next) {
if(strcmp(a->name, "name") == 0)
seen_name++;
else if(strcmp(a->name, "function") == 0) {
seen_function++;
} else if(strcmp(a->name, "option") == 0)
ret += check_option(a->u.assignment);
else if(strcmp(a->name, "help") == 0) {
seen_help++;
} else if(strcmp(a->name, "argument") == 0) {
seen_argument++;
} else if(strcmp(a->name, "min_args") == 0) {
seen_minargs++;
} else if(strcmp(a->name, "max_args") == 0) {
seen_maxargs++;
} else {
ex(a, "unknown name");
ret++;
}
}
if(seen_name == 0) {
ex(as, "no command name");
ret++;
}
if(seen_function > 1) {
ex(as, "multiple function names");
ret++;
}
if(seen_help > 1) {
ex(as, "multiple help strings");
ret++;
}
if(seen_argument > 1) {
ex(as, "multiple argument strings");
ret++;
}
if(seen_minargs > 1) {
ex(as, "multiple min_args strings");
ret++;
}
if(seen_maxargs > 1) {
ex(as, "multiple max_args strings");
ret++;
}
return ret;
}
static int
check(struct assignment *as)
{
struct assignment *a;
int ret = 0;
for(a = as; a != NULL; a = a->next) {
if(strcmp(a->name, "command")) {
fprintf(stderr, "unknown type %s line %d\n", a->name, a->lineno);
ret++;
continue;
}
if(a->type != a_assignment) {
fprintf(stderr, "bad command definition %s line %d\n", a->name, a->lineno);
ret++;
continue;
}
ret += check_command(a->u.assignment);
}
return ret;
}
static struct assignment *
find_next(struct assignment *as, const char *name)
{
for(as = as->next; as != NULL; as = as->next) {
if(strcmp(as->name, name) == 0)
return as;
}
return NULL;
}
static struct assignment *
find(struct assignment *as, const char *name)
{
for(; as != NULL; as = as->next) {
if(strcmp(as->name, name) == 0)
return as;
}
return NULL;
}
static void
space(FILE *f, int level)
{
fprintf(f, "%*.*s", level * 4, level * 4, " ");
}
static void
cprint(int level, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
space(cfile, level);
vfprintf(cfile, fmt, ap);
va_end(ap);
}
static void
hprint(int level, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
space(hfile, level);
vfprintf(hfile, fmt, ap);
va_end(ap);
}
static void gen_name(char *str);
static void
gen_command(struct assignment *as)
{
struct assignment *a, *b;
char *f;
a = find(as, "name");
f = strdup(a->u.value);
gen_name(f);
cprint(1, " { ");
fprintf(cfile, "\"%s\", ", a->u.value);
fprintf(cfile, "%s_wrap, ", f);
b = find(as, "argument");
if(b)
fprintf(cfile, "\"%s %s\", ", a->u.value, b->u.value);
else
fprintf(cfile, "\"%s\", ", a->u.value);
b = find(as, "help");
if(b)
fprintf(cfile, "\"%s\"", b->u.value);
else
fprintf(cfile, "NULL");
fprintf(cfile, " },\n");
for(a = a->next; a != NULL; a = a->next)
if(strcmp(a->name, "name") == 0)
cprint(1, " { \"%s\" },\n", a->u.value);
cprint(0, "\n");
}
static void
gen_name(char *str)
{
char *p;
for(p = str; *p != '\0'; p++)
if(!isalnum((unsigned char)*p))
*p = '_';
}
static char *
make_name(struct assignment *as)
{
struct assignment *lopt;
struct assignment *type;
char *s;
lopt = find(as, "long");
if(lopt == NULL)
lopt = find(as, "name");
if(lopt == NULL)
return NULL;
type = find(as, "type");
if(strcmp(type->u.value, "-flag") == 0)
asprintf(&s, "%s_flag", lopt->u.value);
else
asprintf(&s, "%s_%s", lopt->u.value, type->u.value);
gen_name(s);
return s;
}
static void
gen_options(struct assignment *opt1, const char *name)
{
struct assignment *tmp;
hprint(0, "struct %s_options {\n", name);
for(tmp = opt1;
tmp != NULL;
tmp = find_next(tmp, "option")) {
struct assignment *type;
char *s;
s = make_name(tmp->u.assignment);
type = find(tmp->u.assignment, "type");
if(strcmp(type->u.value, "string") == 0)
hprint(1, "char *%s;\n", s);
else if(strcmp(type->u.value, "strings") == 0)
hprint(1, "struct getarg_strings %s;\n", s);
else if(strcmp(type->u.value, "integer") == 0)
hprint(1, "int %s;\n", s);
else if(strcmp(type->u.value, "flag") == 0)
hprint(1, "int %s;\n", s);
else if(strcmp(type->u.value, "-flag") == 0)
hprint(1, "int %s;\n", s);
else {
ex(type, "unknown type \"%s\"", type->u.value);
exit(1);
}
free(s);
}
hprint(0, "};\n");
}
static void
gen_wrapper(struct assignment *as)
{
struct assignment *name;
struct assignment *arg;
struct assignment *opt1;
struct assignment *function;
struct assignment *tmp;
char *f;
int nargs = 0;
int seen_strings = 0;
name = find(as, "name");
arg = find(as, "argument");
opt1 = find(as, "option");
function = find(as, "function");
if(function == NULL)
function = name;
f = strdup(name->u.value);
gen_name(f);
if(opt1 != NULL) {
gen_options(opt1, name->u.value);
hprint(0, "int %s(struct %s_options*, int, char **);\n",
function->u.value, name->u.value);
} else {
hprint(0, "int %s(void*, int, char **);\n",
function->u.value);
}
fprintf(cfile, "static int\n");
fprintf(cfile, "%s_wrap(int argc, char **argv)\n", f);
fprintf(cfile, "{\n");
if(opt1 != NULL)
cprint(1, "struct %s_options opt;\n", name->u.value);
cprint(1, "int ret;\n");
cprint(1, "int optidx = 0;\n");
cprint(1, "struct getargs args[] = {\n");
for(tmp = find(as, "option");
tmp != NULL;
tmp = find_next(tmp, "option")) {
struct assignment *type = find(tmp->u.assignment, "type");
struct assignment *lopt = find(tmp->u.assignment, "long");
struct assignment *sopt = find(tmp->u.assignment, "short");
struct assignment *aarg = find(tmp->u.assignment, "argument");
struct assignment *help = find(tmp->u.assignment, "help");
cprint(2, "{ ");
if(lopt)
fprintf(cfile, "\"%s\", ", lopt->u.value);
else
fprintf(cfile, "NULL, ");
if(sopt)
fprintf(cfile, "'%c', ", *sopt->u.value);
else
fprintf(cfile, "0, ");
if(strcmp(type->u.value, "string") == 0)
fprintf(cfile, "arg_string, ");
else if(strcmp(type->u.value, "strings") == 0)
fprintf(cfile, "arg_strings, ");
else if(strcmp(type->u.value, "integer") == 0)
fprintf(cfile, "arg_integer, ");
else if(strcmp(type->u.value, "flag") == 0)
fprintf(cfile, "arg_flag, ");
else if(strcmp(type->u.value, "-flag") == 0)
fprintf(cfile, "arg_negative_flag, ");
else {
ex(type, "unknown type \"%s\"", type->u.value);
exit(1);
}
fprintf(cfile, "NULL, ");
if(help)
fprintf(cfile, "\"%s\", ", help->u.value);
else
fprintf(cfile, "NULL, ");
if(aarg)
fprintf(cfile, "\"%s\"", aarg->u.value);
else
fprintf(cfile, "NULL");
fprintf(cfile, " },\n");
}
cprint(2, "{ \"help\", 'h', arg_flag, NULL, NULL, NULL }\n");
cprint(1, "};\n");
cprint(1, "int help_flag = 0;\n");
for(tmp = find(as, "option");
tmp != NULL;
tmp = find_next(tmp, "option")) {
char *s;
struct assignment *type = find(tmp->u.assignment, "type");
struct assignment *defval = find(tmp->u.assignment, "default");
s = make_name(tmp->u.assignment);
if(strcmp(type->u.value, "string") == 0) {
if(defval != NULL)
cprint(1, "opt.%s = \"%s\";\n", s, defval->u.value);
else
cprint(1, "opt.%s = NULL;\n", s);
} else if(strcmp(type->u.value, "strings") == 0) {
seen_strings = 1;
cprint(1, "opt.%s.num_strings = 0;\n", s);
cprint(1, "opt.%s.strings = NULL;\n", s);
} else if(strcmp(type->u.value, "integer") == 0) {
if(defval != NULL)
cprint(1, "opt.%s = %s;\n", s, defval->u.value);
else
cprint(1, "opt.%s = 0;\n", s);
} else if(strcmp(type->u.value, "flag") == 0 ||
strcmp(type->u.value, "-flag") == 0) {
if(defval != NULL)
cprint(1, "opt.%s = %s;\n", s, defval->u.value);
else
cprint(1, "opt.%s = 0;\n", s);
} else {
ex(type, "unknown type \"%s\"", type->u.value);
exit(1);
}
free(s);
}
for(tmp = find(as, "option");
tmp != NULL;
tmp = find_next(tmp, "option")) {
char *s;
s = make_name(tmp->u.assignment);
cprint(1, "args[%d].value = &opt.%s;\n", nargs++, s);
free(s);
}
cprint(1, "args[%d].value = &help_flag;\n", nargs++);
cprint(1, "if(getarg(args, %d, argc, argv, &optidx))\n", nargs);
cprint(2, "goto usage;\n");
{
int min_args = -1;
int max_args = -1;
char *end;
if(arg == NULL) {
max_args = 0;
} else {
if((tmp = find(as, "min_args")) != NULL) {
min_args = strtol(tmp->u.value, &end, 0);
if(*end != '\0') {
ex(tmp, "min_args is not numeric");
exit(1);
}
if(min_args < 0) {
ex(tmp, "min_args must be non-negative");
exit(1);
}
}
if((tmp = find(as, "max_args")) != NULL) {
max_args = strtol(tmp->u.value, &end, 0);
if(*end != '\0') {
ex(tmp, "max_args is not numeric");
exit(1);
}
if(max_args < 0) {
ex(tmp, "max_args must be non-negative");
exit(1);
}
}
}
if(min_args != -1 || max_args != -1) {
if(min_args == max_args) {
cprint(1, "if(argc - optidx != %d) {\n",
min_args);
cprint(2, "fprintf(stderr, \"Need exactly %u parameters (%%u given).\\n\\n\", argc - optidx);\n", min_args);
cprint(2, "goto usage;\n");
cprint(1, "}\n");
} else {
if(max_args != -1) {
cprint(1, "if(argc - optidx > %d) {\n", max_args);
cprint(2, "fprintf(stderr, \"Arguments given (%%u) are more than expected (%u).\\n\\n\", argc - optidx);\n", max_args);
cprint(2, "goto usage;\n");
cprint(1, "}\n");
}
if(min_args != -1) {
cprint(1, "if(argc - optidx < %d) {\n", min_args);
cprint(2, "fprintf(stderr, \"Arguments given (%%u) are less than expected (%u).\\n\\n\", argc - optidx);\n", min_args);
cprint(2, "goto usage;\n");
cprint(1, "}\n");
}
}
}
}
cprint(1, "if(help_flag)\n");
cprint(2, "goto usage;\n");
cprint(1, "ret = %s(%s, argc - optidx, argv + optidx);\n",
function->u.value,
opt1 ? "&opt": "NULL");
if(seen_strings) {
if(seen_strings) {
for(tmp = find(as, "option");
tmp != NULL;
tmp = find_next(tmp, "option")) {
char *s;
struct assignment *type = find(tmp->u.assignment, "type");
s = make_name(tmp->u.assignment);
if(strcmp(type->u.value, "strings") == 0) {
cprint(1, "free_getarg_strings (&opt.%s);\n", s);
}
free(s);
}
}
}
cprint(1, "return ret;\n");
cprint(0, "usage:\n");
cprint(1, "arg_printusage (args, %d, \"%s\", \"%s\");\n", nargs,
name->u.value, arg ? arg->u.value : "");
if(seen_strings) {
for(tmp = find(as, "option");
tmp != NULL;
tmp = find_next(tmp, "option")) {
char *s;
struct assignment *type = find(tmp->u.assignment, "type");
s = make_name(tmp->u.assignment);
if(strcmp(type->u.value, "strings") == 0) {
cprint(1, "free_getarg_strings (&opt.%s);\n", s);
}
free(s);
}
}
cprint(1, "return 0;\n");
cprint(0, "}\n");
cprint(0, "\n");
}
char cname[PATH_MAX];
char hname[PATH_MAX];
static void
gen(struct assignment *as)
{
struct assignment *a;
cprint(0, "#include <stdio.h>\n");
cprint(0, "#include <getarg.h>\n");
cprint(0, "#include <sl.h>\n");
cprint(0, "#include \"%s\"\n\n", hname);
hprint(0, "#include <stdio.h>\n");
hprint(0, "#include <sl.h>\n");
hprint(0, "\n");
for(a = as; a != NULL; a = a->next)
gen_wrapper(a->u.assignment);
cprint(0, "SL_cmd commands[] = {\n");
for(a = as; a != NULL; a = a->next)
gen_command(a->u.assignment);
cprint(1, "{ NULL }\n");
cprint(0, "};\n");
hprint(0, "extern SL_cmd commands[];\n");
}
int version_flag;
int help_flag;
struct getargs args[] = {
{ "version", 0, arg_flag, &version_flag },
{ "help", 0, arg_flag, &help_flag }
};
int num_args = sizeof(args) / sizeof(args[0]);
static void
usage(int code)
{
arg_printusage(args, num_args, NULL, "command-table");
exit(code);
}
int
main(int argc, char **argv)
{
char *p;
int optidx = 0;
setprogname(argv[0]);
if(getarg(args, num_args, argc, argv, &optidx))
usage(1);
if(help_flag)
usage(0);
if(version_flag) {
print_version(NULL);
exit(0);
}
if(argc == optidx)
usage(1);
filename = argv[optidx];
yyin = fopen(filename, "r");
if(yyin == NULL)
err(1, "%s", filename);
p = strrchr(filename, '/');
if(p)
strlcpy(cname, p + 1, sizeof(cname));
else
strlcpy(cname, filename, sizeof(cname));
p = strrchr(cname, '.');
if(p)
*p = '\0';
strlcpy(hname, cname, sizeof(hname));
strlcat(cname, ".c", sizeof(cname));
strlcat(hname, ".h", sizeof(hname));
yyparse();
if(error_flag)
exit(1);
if(check(assignment) == 0) {
cfile = fopen(cname, "w");
if(cfile == NULL)
err(1, "%s", cname);
hfile = fopen(hname, "w");
if(hfile == NULL)
err(1, "%s", hname);
gen(assignment);
fclose(cfile);
fclose(hfile);
}
return 0;
}
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