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dsl.c
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/*
* Copyright (c) 2020, Masatake YAMATO
* Copyright (c) 2020, Red Hat, Inc.
*
* This source code is released for free distribution under the terms of the
* GNU General Public License version 2 or (at your option) any later version.
*/
/*
* INCLUDES
*/
#include "dsl.h"
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <ctype.h>
/*
* TYPES
*/
struct sDSLCode
{
EsObject *expr;
};
struct sDSLEngine
{
DSLProcBind *pbinds;
int pbinds_count;
};
typedef struct sDSLEngine DSLEngine;
/*
* MACROS
*/
/* dummy definition to allow/require an extra semicolon */
#define END_DEF(sfx) typedef int ctags_dummy_int_type_ignore_me_##sfx
#define DECLARE_VALUE_FN(N) \
static EsObject* value_##N (EsObject *args, DSLEnv *env)
#define DEFINE_VALUE_FN(N) \
static EsObject* value_##N (EsObject *args, DSLEnv *env) \
{ \
return dsl_entry_##N (env->entry); \
} END_DEF(value_##N)
/*
* FUNCTION DECLARATIONS
*/
static EsObject *dsl_eval0 (EsObject *object, DSLEnv *env);
static EsObject *dsl_define (DSLEngineType engine, DSLProcBind *pbind);
static EsObject* builtin_null (EsObject *args, DSLEnv *env);
static EsObject* sform_begin (EsObject *args, DSLEnv *env);
static EsObject* sform_begin0 (EsObject *args, DSLEnv *env);
static EsObject* sfrom_and (EsObject *args, DSLEnv *env);
static EsObject* sform_or (EsObject *args, DSLEnv *env);
static EsObject* sform_if (EsObject *args, DSLEnv *env);
static EsObject* sform_cond (EsObject *args, DSLEnv *env);
static EsObject* builtin_not (EsObject *args, DSLEnv *env);
static EsObject* builtin_eq (EsObject *args, DSLEnv *env);
static EsObject* builtin_lt (EsObject *args, DSLEnv *env);
static EsObject* builtin_gt (EsObject *args, DSLEnv *env);
static EsObject* builtin_le (EsObject *args, DSLEnv *env);
static EsObject* builtin_ge (EsObject *args, DSLEnv *env);
static EsObject* builtin_prefix (EsObject *args, DSLEnv *env);
static EsObject* builtin_suffix (EsObject *args, DSLEnv *env);
static EsObject* builtin_substr (EsObject *args, DSLEnv *env);
static EsObject* builtin_member (EsObject *args, DSLEnv *env);
static EsObject* builtin_downcase (EsObject *args, DSLEnv *env);
static EsObject* builtin_upcase (EsObject *args, DSLEnv *env);
static EsObject* builtin_tr (EsObject *args, DSLEnv *env);
static EsObject* builtin_length (EsObject *args, DSLEnv *env);
static EsObject* bulitin_debug_print (EsObject *args, DSLEnv *env);
static EsObject* builtin_entry_ref (EsObject *args, DSLEnv *env);
static EsObject* builtin_string_append (EsObject *args, DSLEnv *env);
static EsObject* builtin_string2regexp (EsObject *args, DSLEnv *env);
static EsObject* builtin_regexp_quote (EsObject *args, DSLEnv *env);
static EsObject* builtin_add (EsObject *args, DSLEnv *env);
static EsObject* builtin_sub (EsObject *args, DSLEnv *env);
static EsObject* value_true (EsObject *args, DSLEnv *env);
static EsObject* value_false (EsObject *args, DSLEnv *env);
static EsObject* value_nil (EsObject *args, DSLEnv *env);
DECLARE_VALUE_FN(name);
DECLARE_VALUE_FN(input);
DECLARE_VALUE_FN(pattern);
DECLARE_VALUE_FN(line);
DECLARE_VALUE_FN(access);
DECLARE_VALUE_FN(end);
DECLARE_VALUE_FN(extras);
DECLARE_VALUE_FN(file);
DECLARE_VALUE_FN(inherits);
DECLARE_VALUE_FN(implementation);
DECLARE_VALUE_FN(kind);
DECLARE_VALUE_FN(language);
DECLARE_VALUE_FN(nth);
DECLARE_VALUE_FN(scope);
DECLARE_VALUE_FN(scope_kind);
DECLARE_VALUE_FN(scope_name);
DECLARE_VALUE_FN(signature);
DECLARE_VALUE_FN(typeref);
DECLARE_VALUE_FN(typeref_kind);
DECLARE_VALUE_FN(typeref_name);
DECLARE_VALUE_FN(roles);
DECLARE_VALUE_FN(xpath);
static EsObject* macro_string_append (EsObject *args);
static EsObject* macro_string2regexp (EsObject *args);
static EsObject* macro_regexp_quote (EsObject *args);
static EsObject* macro_debug_printX (EsObject *args);
/*
* DATA DEFINITIONS
*/
static DSLEngine engines [DSL_ENGINE_COUNT];
static DSLProcBind pbinds_interanl_pseudo [] = {
{ "#/PATTERN/", NULL, NULL, 0, 0,
.helpstr = "(#/patter/ <string>) -> <boolean>; regular expression matching\n"
"(#/patter/ <string> <integer>) -> <string>|\"\"; extact a group matching to the pattern\n"
"(#/patter/ <string> <integer> <any:default>) -> <string>|default; ...returning DEFAULT in case of no match"},
{ "#/PATTERN/i", NULL, NULL, 0, 0,
.helpstr = "(#/patter/i <string>) -> <boolean>; in case insensitive way\n"
"(#/patter/i <string> <integer>) -> <string>|\"\"; extact a group matching to the pattern\n"
"(#/patter/i <string> <integer> <any:default>) -> <string>|default; ...returning DEFAULT in case of no match"},
};
static DSLProcBind pbinds [] = {
{ "null?", builtin_null, NULL, DSL_PATTR_CHECK_ARITY, 1,
.helpstr = "(null? <any>) -> <boolean>" },
{ "begin", sform_begin, NULL, DSL_PATTR_SELF_EVAL, 0UL,
.helpstr = "(begin <any:0> ... <any:n>) -> <any:n>" },
{ "begin0", sform_begin0, NULL, DSL_PATTR_SELF_EVAL, 0UL,
.helpstr = "(begin0 <any:0> ... <any:n>) -> <any:0>" },
{ "and", sfrom_and, NULL, DSL_PATTR_SELF_EVAL,
.helpstr = "(and <any> ...) -> <boolean>" },
{ "or", sform_or, NULL, DSL_PATTR_SELF_EVAL,
.helpstr = "(or <any> ...) -> <boolean>" },
{ "if", sform_if, NULL, DSL_PATTR_SELF_EVAL|DSL_PATTR_CHECK_ARITY, 3,
.helpstr = "(if <any:cond> <any:true> <any:false>) -> <any:true>|<any:false>" },
{ "cond", sform_cond, NULL, DSL_PATTR_SELF_EVAL, 0,
.helpstr = "(cond (<any:cond0> ... <any:expr0>) ... (<any:condN> ... <any:exprN>)) -> <any:exprI>|false" } ,
{ "not", builtin_not, NULL, DSL_PATTR_CHECK_ARITY, 1,
.helpstr = "(not <any>) -> <boolean>" },
{ "eq?", builtin_eq, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(eq? <any> <any>) -> <boolean>" },
{ "<", builtin_lt, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(< <integer> <integer>) -> <boolean>" },
{ ">", builtin_gt, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(> <integer> <integer>) -> <boolean>" },
{ "<=", builtin_le, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(<= <integer> <integer>) -> <boolean>" },
{ ">=", builtin_ge, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(>= <integer> <integer>) -> <boolean>" },
{ "prefix?", builtin_prefix, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(prefix? <string:target> <string:prefix>) -> <boolean>" },
{ "suffix?", builtin_suffix, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(suffix? <string:target> <string:suffix>) -> <boolean>" },
{ "substr?", builtin_substr, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(substr? <string:target> <string:substr>) -> <boolean>" },
{ "member", builtin_member, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(member <any> <list>) -> #f|<list>" },
{ "downcase", builtin_downcase, NULL, DSL_PATTR_CHECK_ARITY, 1,
.helpstr = "(downcase <string>|<list>) -> <string>|<list>" },
{ "upcase", builtin_upcase, NULL, DSL_PATTR_CHECK_ARITY, 1,
.helpstr = "(upcase <string>|<list>) -> <string>|<list>" },
{ "tr", builtin_tr, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(tr <string:target> <string:c0c1>) -> <string>" },
{ "length", builtin_length, NULL, DSL_PATTR_CHECK_ARITY, 1,
.helpstr = "(length <string>) -> <integer>" },
{ "+", builtin_add, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(+ <integer> <integer>) -> <integer>", },
{ "-", builtin_sub, NULL, DSL_PATTR_CHECK_ARITY, 2,
.helpstr = "(- <integer> <integer>) -> <integer>", },
{ "concat", builtin_string_append,NULL, 0, 0,
.helpstr = "(concat <string> ...) -> <string>; an alias for string-append",
.macro = macro_string_append },
{ "string-append", builtin_string_append,NULL, 0, 0,
.helpstr = "(string-append <string> ...) -> <string>",
.macro = macro_string_append },
{ "string->regexp", builtin_string2regexp,NULL, 0, 0,
.helpstr = "((string->regexp <string:pattern>) <string:target>) -> <boolean>",
.macro = macro_string2regexp },
{ "regexp-quote", builtin_regexp_quote, NULL, DSL_PATTR_CHECK_ARITY, 1,
.helpstr = "(regexp-quote <string>) -> <string>",
.macro = macro_regexp_quote },
{ "print", bulitin_debug_print, NULL, DSL_PATTR_CHECK_ARITY, 1,
.helpstr = "(print OBJ) -> OBJ" },
{ "printX", NULL, 0, 0,
.helpstr = "(printX EXPR) -> EXPR; do the same as `print' but this works before evaluating",
.macro = macro_debug_printX },
{ "true", value_true, NULL, 0, 0UL,
.helpstr = "-> #t" },
{ "false", value_false, NULL, 0, 0UL,
.helpstr = "-> #f" },
{ "nil", value_nil, NULL, 0, 0UL,
.helpstr = "-> ()" },
{ "$", builtin_entry_ref, NULL, DSL_PATTR_CHECK_ARITY_OPT, 1,
.helpstr = "($ <string:field>) -> <string>|#f\n"
"($ <string:field> <any:default>) -> <string>|<any:default>"},
{ "$name", value_name, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> <string>"},
{ "$input", value_input, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> <string>; input file name" },
{ "$pattern", value_pattern, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$line", value_line, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<integer>" },
{ "$access", value_access, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>" },
{ "$end", value_end, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<integer>"},
{ "$extras", value_extras, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$file", value_file, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> <boolean>; whether the scope is limited in the file or not." },
{ "$inherits", value_inherits, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> <list>" },
{ "$implementation", value_implementation, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>" },
{ "$nth", value_nth, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<integer>"},
{ "$kind", value_kind, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$language", value_language, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>" },
{ "$scope", value_scope, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>; $scope-kind:$scope-name"},
{ "$scope-kind", value_scope_kind, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$scope-name", value_scope_name, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$signature", value_signature, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>" },
{ "$typeref", value_typeref, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$typeref-kind", value_typeref_kind, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$typeref-name", value_typeref_name, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
{ "$roles", value_roles, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> <list>" },
{ "$xpath", value_xpath, NULL, DSL_PATTR_MEMORABLE, 0UL,
.helpstr = "-> #f|<string>"},
};
/*
* FUNCTION DEFINITIONS
*/
static EsObject * dsl_define (DSLEngineType engine, DSLProcBind *pbind)
{
EsObject *name = es_symbol_intern (pbind->name);
if (name == es_nil)
return es_nil;
DSLProcBind **pbs = es_symbol_get_data (name);
if (!pbs)
{
pbs = calloc (DSL_ENGINE_COUNT, sizeof (pbinds[0]));
if (!pbs)
return es_nil;
es_symbol_set_data (name, pbs);
}
pbs [engine] = pbind;
return name;
}
int dsl_init (DSLEngineType engine, DSLProcBind *engine_pbinds, int count)
{
static int initialized = 0;
if (!initialized)
{
engines [DSL_INTERNAL_PSEUDO].pbinds = pbinds_interanl_pseudo;
engines [DSL_INTERNAL_PSEUDO].pbinds_count
= sizeof(pbinds_interanl_pseudo)/sizeof(pbinds_interanl_pseudo [0]);
for (int i = 0; i < sizeof(pbinds)/sizeof(pbinds [0]); i++)
{
if (dsl_define (DSL_COMMON, pbinds + i) == NULL)
return 0;
}
engines [DSL_COMMON].pbinds = pbinds;
engines [DSL_COMMON].pbinds_count = sizeof(pbinds)/sizeof(pbinds [0]);
initialized = 1;
}
for (int i = 0; i < count; i++)
{
if (dsl_define (engine, engine_pbinds + i) == NULL)
return 0;
}
engines [engine].pbinds = engine_pbinds;
engines [engine].pbinds_count = count;
return 1;
}
DSLProcBind *dsl_lookup (DSLEngineType engine, EsObject *name)
{
DSLProcBind **pbs = es_symbol_get_data (name);
if (!pbs)
return NULL;
return pbs [engine]? pbs [engine]: pbs [DSL_COMMON];
}
static void dsl_help0 (DSLEngineType engine, FILE *fp)
{
DSLEngine *e = engines + engine;
for (int i = 0; i < e->pbinds_count; i++)
{
const char* hs = e->pbinds [i].helpstr;
if (!hs)
{
fprintf(fp, "%15s: \n", e->pbinds [i].name);
continue;
}
while (hs)
{
const char *hs0 = strchr (hs, '\n');
fprintf(fp, "%15s: ", (e->pbinds [i].helpstr == hs
? e->pbinds [i].name
: ""));
if (hs0)
{
hs0++;
fwrite(hs, 1, hs0 - hs, fp);
}
else
{
fputs(hs, fp);
fputc('\n', fp);
}
hs = hs0;
}
}
}
void dsl_help (DSLEngineType engine, FILE *fp)
{
dsl_help0 (DSL_INTERNAL_PSEUDO, fp);
dsl_help0 (DSL_COMMON, fp);
dsl_help0 (engine, fp);
}
static void dsl_cache_reset0 (DSLProcBind *pb)
{
if (pb->flags & DSL_PATTR_MEMORABLE)
pb->cache = NULL;
}
void dsl_cache_reset (DSLEngineType engine)
{
for (int i = 0; i < sizeof(pbinds)/sizeof(pbinds [0]); i++)
dsl_cache_reset0 (pbinds + i);
DSLEngine *e = engines + engine;
for (int i = 0; i < e->pbinds_count; i++)
dsl_cache_reset0( e->pbinds + i);
}
static int length (EsObject *object)
{
int i;
for (i = 0; !es_null (object); i++)
object = es_cdr (object);
return i;
}
static EsObject *error_included (EsObject *object)
{
while (!es_null (object))
{
if (es_error_p (es_car (object)))
return es_car (object);
object = es_cdr (object);
}
return es_false;
}
static EsObject *eval0 (EsObject *object, DSLEnv *env)
{
if (es_null (object))
return es_nil;
else
return es_object_autounref (
es_cons(dsl_eval0 (es_car (object), env),
eval0 (es_cdr (object), env))
);
}
static EsObject *dsl_eval0 (EsObject *object, DSLEnv *env)
{
EsObject *r;
DSLProcBind *pb;
EsObject *car;
if (es_null (object))
return es_nil;
else if (es_symbol_p (object))
{
pb = dsl_lookup (env->engine, object);
if (pb)
{
if (pb->cache)
return pb->cache;
r = pb->proc (es_nil, env);
if (pb->flags & DSL_PATTR_MEMORABLE)
pb->cache = r;
return r;
}
else
dsl_throw (UNBOUND_VARIABLE, object);
}
else if (es_atom (object))
return object;
car = es_car (object);
if (es_regex_p(car))
{
EsObject *cdr = es_cdr (object);
int l = length (cdr);
if (l < 1)
dsl_throw (TOO_FEW_ARGUMENTS, car);
if (l > 3)
dsl_throw (TOO_MANY_ARGUMENTS, car);
cdr = eval0(cdr, env);
EsObject *err;
err = error_included (cdr);
if (!es_object_equal (err, es_false))
return err;
EsObject *cadr = es_car (cdr);
if (!es_string_p (cadr))
dsl_throw (WRONG_TYPE_ARGUMENT, object);
if (l == 1)
return es_regex_exec (car, cadr);
EsObject *cddr = es_cdr (cdr);
EsObject *caddr = es_car (cddr);
if (!es_number_p (caddr))
dsl_throw (WRONG_TYPE_ARGUMENT, object);
int group = es_integer_get(caddr);
if (group < 1)
dsl_throw (WRONG_REGEX_GROUP, object);
EsObject *matched = es_regex_exec_extract_match_new (car, cadr, group);
if (es_string_p(matched))
return es_object_autounref(matched);
else if (es_null(matched))
dsl_throw (WRONG_REGEX_GROUP, object);
if (l == 3)
{
EsObject *cdddr = es_cdr (cddr);
return es_car (cdddr);
}
return es_object_autounref(es_string_new(""));
}
else if (es_error_p(car))
return car;
else if (es_cons_p (car))
{
car = dsl_eval0 (car, env);
if (es_error_p(car))
return car;
object = es_object_autounref (es_cons (car, es_cdr (object)));
return dsl_eval0 (object, env);
}
else if (es_symbol_p(car))
{
EsObject *cdr = es_cdr (object);
int l;
pb = dsl_lookup (env->engine, car);
if (!pb)
dsl_throw (UNBOUND_VARIABLE, car);
if (pb->cache)
return pb->cache;
if (pb->flags & DSL_PATTR_CHECK_ARITY)
{
l = length (cdr);
if (l < pb->arity)
dsl_throw (TOO_FEW_ARGUMENTS, car);
else if (l > pb->arity &&
!(pb->flags & DSL_PATTR_CHECK_ARITY_OPT))
dsl_throw (TOO_MANY_ARGUMENTS, car);
}
if (! (pb->flags & DSL_PATTR_SELF_EVAL))
{
EsObject *err;
cdr = eval0(cdr, env);
err = error_included (cdr);
if (!es_object_equal (err, es_false))
return err;
}
r = pb->proc (cdr, env);
if (pb->flags & DSL_PATTR_MEMORABLE)
pb->cache = r;
return r;
}
else
dsl_throw (CALLABLE_REQUIRED, car);
}
EsObject *dsl_eval (DSLCode *code, DSLEnv *env)
{
return dsl_eval0 (code->expr, env);
}
EsObject *dsl_compile_and_eval (EsObject *expr, DSLEnv *env)
{
return dsl_eval0 (expr, env);
}
static EsObject *compile (EsObject *expr, void *engine)
{
if (!es_cons_p (expr))
return es_object_ref (expr);
EsObject *head = es_car (expr);
if (es_symbol_p (head))
{
DSLProcBind *pb = dsl_lookup (*((DSLEngineType *)engine),
head);
if (!pb)
dsl_throw (UNBOUND_VARIABLE, head);
if (pb->macro)
{
EsObject *tail = compile (es_cdr (expr), engine);
if (es_error_p (tail))
return tail;
expr = es_cons (head, tail);
EsObject *r = pb->macro (expr);
es_object_unref (expr);
es_object_unref (tail);
return r;
}
}
return es_map (compile, expr, engine);
}
DSLCode *dsl_compile (DSLEngineType engine, EsObject *expr)
{
DSLCode *code = malloc (sizeof (DSLCode));
if (code == NULL)
return NULL;
code->expr = compile (expr, &engine);
if (es_null (code->expr))
{
free (code);
return NULL;
}
else if (es_error_p (code->expr))
{
dsl_report_error ("COMPILE ERROR", code->expr);
free (code);
return NULL;
}
return code;
}
void dsl_release (DSLEngineType engine, DSLCode *code)
{
es_object_unref (code->expr);
free (code);
}
/*
* Built-ins
*/
static EsObject* builtin_null (EsObject *args, DSLEnv *env)
{
return es_null(es_car (args))? es_true: es_false;
}
static EsObject* sform_begin_common (const char *fn, EsObject *args, DSLEnv *env)
{
if (es_null (args))
dsl_throw (TOO_FEW_ARGUMENTS,
es_symbol_intern (fn));
EsObject *o = es_false;
while (! es_null (args))
{
o = es_car (args);
o = dsl_eval0 (o, env);
if (es_error_p (o))
return o;
args = es_cdr (args);
}
return o;
}
static EsObject* sform_begin (EsObject *args, DSLEnv *env)
{
return sform_begin_common ("begin", args, env);
}
static EsObject* sform_begin0 (EsObject *args, DSLEnv *env)
{
if (es_null (args))
dsl_throw (TOO_FEW_ARGUMENTS, es_symbol_intern ("begin0"));
int count = 0;
EsObject *o, *o0 = es_false;
while (! es_null (args))
{
o = es_car (args);
o = dsl_eval0 (o, env);
if (!count++)
o0 = o;
if (es_error_p (o))
return o;
args = es_cdr (args);
}
return o0;
}
static EsObject* sfrom_and (EsObject *args, DSLEnv *env)
{
EsObject *o = es_true;
while (! es_null (args))
{
o = es_car (args);
o = dsl_eval0 (o, env);
if (es_object_equal (o, es_false))
return es_false;
else if (es_error_p (o))
return o;
args = es_cdr (args);
}
return o;
}
static EsObject* sform_or (EsObject *args, DSLEnv *env)
{
EsObject *o;
while (! es_null (args))
{
o = es_car (args);
o = dsl_eval0 (o, env);
if (! es_object_equal (o, es_false))
return o;
else if (es_error_p (o))
return o;
args = es_cdr (args);
}
return es_false;
}
static EsObject* sform_if (EsObject *args, DSLEnv *env)
{
EsObject *o;
o = es_car (args);
o = dsl_eval0 (o, env);
if (!es_object_equal (o, es_false))
return dsl_eval0 (es_car (es_cdr (args)), env);
else if (es_error_p (o))
return o;
else
return dsl_eval0 (es_car (es_cdr (es_cdr (args))), env);
return es_false;
}
static EsObject* sform_cond (EsObject *args, DSLEnv *env)
{
while (!es_null(args))
{
EsObject *o = es_car (args);
args = es_cdr (args);
if (!es_cons_p (o))
dsl_throw (WRONG_TYPE_ARGUMENT, o);
EsObject *condition = es_car(o);
EsObject *actions = es_cdr(o);
EsObject *result = dsl_eval0 (condition, env);
if (es_error_p (result))
return result;
if (!es_object_equal (result, es_false))
{
if (es_null (actions))
return result;
return sform_begin_common("cond", actions, env);
}
}
return es_false;
}
static EsObject* builtin_not (EsObject *args, DSLEnv *env)
{
if (es_object_equal (es_car(args), es_false))
return es_true;
else if (es_error_p (es_car(args)))
return es_car(args);
else
return es_false;
}
#define DEFINE_OP_WITH_CHECK(N, X, C, E, O) \
static EsObject* builtin_##N (EsObject *args, DSLEnv *env) \
{ \
EsObject *a, *b; \
\
a = es_car (args); \
b = es_car (es_cdr (args)); \
if (!C (a)) dsl_throw(E, O); \
if (!C (b)) dsl_throw(E, O); \
if (X) \
return es_true; \
else \
return es_false; \
} END_DEF(builtin_##N)
static EsObject* builtin_eq (EsObject *args, DSLEnv *env)
{
EsObject *a, *b;
a = es_car (args);
b = es_car (es_cdr (args));
if (es_object_equal(a, b))
return es_true;
else
return es_false;
}
DEFINE_OP_WITH_CHECK(lt, es_number_get (a) < es_number_get (b), es_number_p, NUMBER_REQUIRED, es_symbol_intern ("<"));
DEFINE_OP_WITH_CHECK(gt, es_number_get (a) > es_number_get (b), es_number_p, NUMBER_REQUIRED, es_symbol_intern (">"));
DEFINE_OP_WITH_CHECK(le, es_number_get (a) <= es_number_get (b), es_number_p, NUMBER_REQUIRED, es_symbol_intern ("<="));
DEFINE_OP_WITH_CHECK(ge, es_number_get (a) >= es_number_get (b), es_number_p, NUMBER_REQUIRED, es_symbol_intern (">="));
static EsObject* builtin_prefix (EsObject* args, DSLEnv *env)
{
EsObject *target = es_car (args);
EsObject *prefix = es_car (es_cdr (args));
const char *ts;
const char *ps;
size_t tl;
size_t pl;
if ((! es_string_p (target))
|| (! es_string_p (prefix)))
dsl_throw (WRONG_TYPE_ARGUMENT, es_symbol_intern ("prefix?"));
ts = es_string_get (target);
ps = es_string_get (prefix);
tl = strlen (ts);
pl = strlen (ps);
if (tl < pl)
return es_false;
return (strncmp (ts, ps, pl) == 0)? es_true: es_false;
}
static EsObject* builtin_suffix (EsObject* args, DSLEnv *env)
{
EsObject *target = es_car (args);
EsObject *suffix = es_car (es_cdr (args));
const char *ts;
const char *ss;
size_t tl;
size_t sl;
unsigned int d;
if ((! es_string_p (target))
|| (! es_string_p (suffix)))
dsl_throw (WRONG_TYPE_ARGUMENT, es_symbol_intern ("suffix?"));
ts = es_string_get (target);
ss = es_string_get (suffix);
tl = strlen (ts);
sl = strlen (ss);
if (tl < sl)
return es_false;
d = tl - sl;
return (strcmp (ts + d, ss) == 0)? es_true: es_false;
}
static EsObject* builtin_substr (EsObject* args, DSLEnv *env)
{
EsObject *target = es_car (args);
EsObject *substr = es_car (es_cdr (args));
const char *ts;
const char *ss;
if ((! es_string_p (target))
|| (! es_string_p (substr)))
dsl_throw (WRONG_TYPE_ARGUMENT, es_symbol_intern("substr?"));
ts = es_string_get (target);
ss = es_string_get (substr);
return strstr(ts, ss) == NULL? es_false: es_true;
}
static EsObject* builtin_member (EsObject *args, DSLEnv *env)
{
EsObject *elt = es_car (args);
EsObject *lst = es_car (es_cdr (args));
if (! es_list_p (lst))
dsl_throw (WRONG_TYPE_ARGUMENT, es_symbol_intern ("member"));
while (!es_null (lst))
{
if (es_object_equal (elt, es_car (lst)))
return lst;
lst = es_cdr (lst);
}
return es_false;
}
static EsObject* caseop (EsObject *o, int (*op)(int))
{
if (es_string_p (o))
{
const char *s = es_string_get (o);
char *r = strdup (s);
if (r == NULL)
return ES_ERROR_MEMORY;
for (char *tmp = r; *tmp != '\0'; tmp++)
*tmp = op ((unsigned char) *tmp);
EsObject *q = es_object_autounref (es_string_new (r));
free (r);
return q;
}
else
return o;
}
static EsObject* downcase (EsObject *o)
{
return caseop (o, tolower);
}
static EsObject* upcase (EsObject *o)
{
return caseop (o, toupper);
}
static EsObject* builtin_caseop0 (EsObject *o,
EsObject *(* op) (EsObject*))
{
if (es_null (o)
|| es_error_p (o))
return o;
else if (es_list_p (o))
{
EsObject *oa = es_car (o);
EsObject *od = es_cdr (o);
EsObject *da, *dd;
da = op (oa);
if (es_error_p (da))
return da;
dd = builtin_caseop0 (od, op);
if (es_error_p (dd))
return dd;
return es_object_autounref (es_cons (da, dd));
}
else
return op (o);
}
static EsObject* builtin_downcase (EsObject *args, DSLEnv *env)
{
EsObject *o = es_car(args);
return builtin_caseop0 (o, downcase);
}
static EsObject* builtin_upcase (EsObject *args, DSLEnv *env)
{
EsObject *o = es_car(args);
return builtin_caseop0 (o, upcase);
}
static EsObject* tr(const char *target, char from, char to)
{
char *r = strdup(target);
if (r == NULL)
return ES_ERROR_MEMORY;
for (char *tmp = r; *tmp != '\0'; tmp++)
{
if (*tmp == from)
*tmp = to;
}
EsObject *q = es_object_autounref (es_string_new (r));
free (r);
return q;
}
static EsObject* builtin_tr (EsObject *args, DSLEnv *env)
{
EsObject *o_target = es_car(args);
EsObject *o_c0c1 = es_car(es_cdr(args));
if (!es_string_p (o_target))
return o_target;
if (!es_string_p (o_c0c1))
dsl_throw (STRING_REQUIRED, es_symbol_intern ("tr"));
const char *cstr_target = es_string_get (o_target);
const char *cstr_c0c1 = es_string_get (o_c0c1);
if (cstr_target[0] == '\0')
return o_target;
size_t len_c0c1 = strlen (cstr_c0c1);
if (len_c0c1 != 2)
dsl_throw (UNEXPECTED_STRING_LENGTH, es_symbol_intern ("tr"));
return tr (cstr_target, cstr_c0c1[0], cstr_c0c1[1]);
}
static EsObject* builtin_length (EsObject *args, DSLEnv *env)
{
EsObject *o = es_car(args);
if (es_error_p (o))
return o;
if (!es_string_p (o))
dsl_throw (WRONG_TYPE_ARGUMENT, es_symbol_intern ("length"));
const char *cstr = es_string_get (o);
size_t len = strlen (cstr);
return es_object_autounref (es_integer_new ((int)len));
}
static MIO *miodebug;
static EsObject* bulitin_debug_print (EsObject *args, DSLEnv *env)
{
if (miodebug == NULL)
miodebug = mio_new_fp (stderr, NULL);
EsObject *o = es_car(args);
es_print(o, miodebug);
putc('\n', stderr);
return o;
}
/*
* Accessesors for tagEntry
*/
/*
* Value functions