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[m6w6/ext-psi] / src / parser.h

#ifndef _PSI_PARSER_H
#define _PSI_PARSER_H

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>

#include <Zend/zend_types.h>
#include <Zend/zend_API.h> /* fcall */

#include "parser_proc.h"

#define BSIZE 256

#define PSI_T_POINTER PSI_T_ASTERISK
#define PSI_T_LONG_DOUBLE (PSI_T_DOUBLE << 16)

typedef int token_t;

size_t psi_t_alignment(token_t);
size_t psi_t_size(token_t);

typedef struct PSI_Token {
        token_t type;
        unsigned size, line, col;
        char *text, *file;
        char buf[1];
} PSI_Token;

static inline PSI_Token *PSI_TokenCopy(PSI_Token *src);

typedef struct zend_fcall {
        zend_fcall_info fci;
        zend_fcall_info_cache fcc;
} zend_fcall;

typedef union impl_val {
        char cval;
        int8_t i8;
        uint8_t u8;
        short sval;
        int16_t i16;
        uint16_t u16;
        int ival;
        int32_t i32;
        uint32_t u32;
        long lval;
        int64_t i64;
        uint64_t u64;
        float fval;
        double dval;
#ifdef HAVE_LONG_DOUBLE
        long double ldval;
#endif
        union {
                zend_bool bval;
                zend_long lval;
                zend_string *str;
                zend_fcall *cb;
        } zend;
        void *ptr;
        uint8_t _dbg[sizeof(void *)];
} impl_val;

typedef struct decl_type {
        PSI_Token *token;
        char *name;
        token_t type;
        struct decl_type *real;
        struct decl_struct *strct;
        struct decl_union *unn;
        struct decl_enum *enm;
        struct decl *func;
} decl_type;

static inline decl_type *init_decl_type(token_t type, const char *name) {
        decl_type *t = calloc(1, sizeof(*t));
        t->type = type;
        t->name = strdup(name);
        return t;
}

static inline decl_type *real_decl_type(decl_type *type) {
        while (type->real) {
                type = type->real;
        }
        return type;
}

static inline void free_decl(struct decl *decl);
static inline void free_decl_type(decl_type *type) {
        if (type->token) {
                free(type->token);
        }
        if (type->type == PSI_T_FUNCTION) {
                free_decl(type->func);
        }
        free(type->name);
        free(type);
}

typedef struct decl_var {
        PSI_Token *token;
        char *name;
        unsigned pointer_level;
        unsigned array_size;
        struct decl_arg *arg;
} decl_var;

static inline decl_var *init_decl_var(const char *name, unsigned pl, unsigned as) {
        decl_var *v = calloc(1, sizeof(*v));
        v->name = (char *) strdup((const char *) name);
        v->pointer_level = pl;
        v->array_size = as;
        return v;
}

static inline decl_var *copy_decl_var(decl_var *src) {
        decl_var *dest = calloc(1, sizeof(*dest));

        memcpy(dest, src, sizeof(*dest));
        dest->name = strdup(dest->name);
        if (dest->token) {
                dest->token = PSI_TokenCopy(dest->token);
        }
        return dest;
}

static inline void free_decl_var(decl_var *var) {
        if (var->token) {
                free(var->token);
        }
        free(var->name);
        free(var);
}

typedef struct decl_struct_layout {
        size_t pos;
        size_t len;
} decl_struct_layout;

static inline decl_struct_layout *init_decl_struct_layout(size_t pos, size_t len) {
        decl_struct_layout *l = calloc(1, sizeof(*l));
        ZEND_ASSERT(pos+len);
        l->pos = pos;
        l->len = len;
        return l;
}

static inline void free_decl_struct_layout(decl_struct_layout *l) {
        free(l);
}

typedef struct decl_arg {
        PSI_Token *token;
        decl_type *type;
        decl_var *var;
        decl_struct_layout *layout;
        struct let_stmt *let;
        impl_val val;
        void *ptr;
        void *mem;
} decl_arg;

static inline decl_arg *init_decl_arg(decl_type *type, decl_var *var) {
        decl_arg *arg = calloc(1, sizeof(*arg));
        arg->token = var->token;
        arg->type = type;
        arg->var = var;
        var->arg = arg;
        arg->ptr = &arg->val;
        return arg;
}

static inline void free_decl_arg(decl_arg *arg) {
        if (arg->token && arg->token != arg->var->token) {
                free(arg->token);
        }
        free_decl_type(arg->type);
        free_decl_var(arg->var);
        if (arg->layout) {
                free_decl_struct_layout(arg->layout);
        }
        free(arg);
}

typedef struct decl_typedefs {
        size_t count;
        decl_arg **list;
} decl_typedefs;

static inline decl_typedefs *add_decl_typedef(decl_typedefs *defs, decl_arg *def) {
        if (!defs) {
                defs = calloc(1, sizeof(*defs));
        }
        defs->list = realloc(defs->list, ++defs->count * sizeof(*defs->list));
        defs->list[defs->count-1] = def;
        return defs;
}

static void free_decl_typedefs(decl_typedefs *defs) {
        size_t i;

        for (i = 0; i < defs->count; ++i) {
                free_decl_arg(defs->list[i]);
        }
        free(defs->list);
        free(defs);
}

typedef struct decl_vars {
        decl_var **vars;
        size_t count;
} decl_vars;

static inline decl_vars *init_decl_vars(decl_var *var) {
        decl_vars *vars = calloc(1, sizeof(*vars));
        if (var) {
                vars->count = 1;
                vars->vars = calloc(1, sizeof(*vars->vars));
                vars->vars[0] = var;
        }
        return vars;
}

static inline decl_vars *add_decl_var(decl_vars *vars, decl_var *var) {
        vars->vars = realloc(vars->vars, ++vars->count * sizeof(*vars->vars));
        vars->vars[vars->count-1] = var;
        return vars;
}

static inline void free_decl_vars(decl_vars *vars) {
        size_t i;

        for (i = 0; i < vars->count; ++i) {
                free_decl_var(vars->vars[i]);
        }
        free(vars->vars);
        free(vars);
}

typedef struct decl_args {
        decl_arg **args;
        size_t count;
        unsigned varargs:1;
} decl_args;

static inline decl_args *init_decl_args(decl_arg *arg) {
        decl_args *args = calloc(1, sizeof(*args));
        if (arg) {
                args->count = 1;
                args->args = calloc(1, sizeof(*args->args));
                args->args[0] = arg;
        }
        return args;
}

static inline decl_args *add_decl_arg(decl_args *args, decl_arg *arg) {
        args->args = realloc(args->args, ++args->count * sizeof(*args->args));
        args->args[args->count-1] = arg;
        return args;
}

static inline void free_decl_args(decl_args *args) {
        size_t i;

        for (i = 0; i < args->count; ++i) {
                free_decl_arg(args->args[i]);
        }
        free(args->args);
        free(args);
}

typedef struct decl_abi {
        PSI_Token *token;
        char *convention;
} decl_abi;

static inline decl_abi *init_decl_abi(const char *convention) {
        decl_abi *abi = calloc(1, sizeof(*abi));
        abi->convention = strdup(convention);
        return abi;
}

static inline void free_decl_abi(decl_abi *abi) {
        if (abi->token) {
                free(abi->token);
        }
        free(abi->convention);
        free(abi);
}

typedef struct decl_callinfo {
        void *sym;
        void *info;
        size_t argc;
        void **args;
        void **rval;
        struct {
                void *data;
                void (*dtor)(void *data);
        } closure;
} decl_callinfo;

typedef struct decl {
        decl_abi *abi;
        decl_arg *func;
        decl_args *args;
        struct impl *impl;
        decl_callinfo call;
} decl;

static inline decl* init_decl(decl_abi *abi, decl_arg *func, decl_args *args) {
        decl *d = calloc(1, sizeof(*d));
        d->abi = abi;
        d->func = func;
        d->args = args;
        return d;
}

static inline void free_decl(decl *d) {
        free_decl_abi(d->abi);
        free_decl_arg(d->func);
        if (d->args) {
                free_decl_args(d->args);
        }
        free(d);
}

typedef struct decls {
        size_t count;
        decl **list;
} decls;

static inline decls *add_decl(decls *decls, decl *decl) {
        if (!decls) {
                decls = calloc(1, sizeof(*decls));
        }
        decls->list = realloc(decls->list, ++decls->count * sizeof(*decls->list));
        decls->list[decls->count-1] = decl;
        return decls;
}

static inline void free_decls(decls *decls) {
        size_t i;

        for (i = 0; i < decls->count; ++i) {
                free_decl(decls->list[i]);
        }
        free(decls->list);
        free(decls);
}


typedef struct decl_struct {
        PSI_Token *token;
        char *name;
        decl_args *args;
        size_t size;
        size_t align;
        struct {
                void *type;
                void (*dtor)(void *type);
        } engine;
} decl_struct;

static inline decl_struct *init_decl_struct(const char *name, decl_args *args) {
        decl_struct *s = calloc(1, sizeof(*s));
        s->name = strdup(name);
        s->args = args;
        return s;
}

static inline void free_decl_struct(decl_struct *s) {
        if (s->token) {
                free(s->token);
        }
        if (s->args) {
                free_decl_args(s->args);
        }
        if (s->engine.type && s->engine.dtor) {
                s->engine.dtor(s->engine.type);
        }
        free(s->name);
        free(s);
}

typedef struct decl_structs {
        size_t count;
        decl_struct **list;
} decl_structs;

static inline decl_structs *add_decl_struct(decl_structs *ss, decl_struct *s) {
        if (!ss) {
                ss = calloc(1, sizeof(*ss));
        }
        ss->list = realloc(ss->list, ++ss->count * sizeof(*ss->list));
        ss->list[ss->count-1] = s;
        return ss;
}

static inline void free_decl_structs(decl_structs *ss) {
        size_t i;

        for (i = 0; i < ss->count; ++i) {
                free_decl_struct(ss->list[i]);
        }
        free(ss->list);
        free(ss);
}

typedef struct decl_union {
        PSI_Token *token;
        char *name;
        decl_args *args;
        size_t size;
        size_t align;
} decl_union;

static inline decl_union *init_decl_union(const char *name, decl_args *args) {
        decl_union *u = calloc(1, sizeof(*u));
        u->name = strdup(name);
        u->args = args;
        return u;
}

static inline void free_decl_union(decl_union *u) {
        if (u->token) {
                free(u->token);
        }
        if (u->args) {
                free_decl_args(u->args);
        }
        free(u->name);
        free(u);
}

typedef struct decl_unions {
        decl_union **list;
        size_t count;
} decl_unions;

static inline decl_unions *add_decl_union(decl_unions *uu, decl_union *u) {
        if (!uu) {
                uu = calloc(1, sizeof(*uu));
        }
        uu->list = realloc(uu->list, ++uu->count * sizeof(*uu->list));
        uu->list[uu->count-1] = u;
        return uu;
}

static inline void free_decl_unions(decl_unions *uu) {
        size_t i;

        for (i = 0; i < uu->count; ++i) {
                free_decl_union(uu->list[i]);
        }
        free(uu->list);
        free(uu);
}

typedef struct impl_type {
        char *name;
        token_t type;
} impl_type;

static inline impl_type *init_impl_type(token_t type, const char *name) {
        impl_type *t = calloc(1, sizeof(*t));

        t->type = type;
        t->name = strdup(name);
        return t;
}

static inline void free_impl_type(impl_type *type) {
        free(type->name);
        free(type);
}

typedef struct impl_var {
        PSI_Token *token;
        char *name;
        unsigned reference:1;
} impl_var;

static inline impl_var *init_impl_var(const char *name, int is_reference) {
        impl_var *var = calloc(1, sizeof(*var));
        var->name = strdup(name);
        var->reference = is_reference;
        return var;
}

static inline impl_var *copy_impl_var(impl_var *var) {
        impl_var *cpy = malloc(sizeof(*cpy));

        memcpy(cpy, var, sizeof(*cpy));
        cpy->name = strdup(cpy->name);
        if (cpy->token) {
                cpy->token = PSI_TokenCopy(cpy->token);
        }
        return cpy;
}

static inline void free_impl_var(impl_var *var) {
        if (var->token) {
                free(var->token);
        }
        free(var->name);
        free(var);
}

typedef struct impl_def_val {
        token_t type;
        char *text;
} impl_def_val;

static inline impl_def_val *init_impl_def_val(token_t t, const char *text) {
        impl_def_val *def = calloc(1, sizeof(*def));
        def->type = t;
        def->text = strdup(text);
        return def;
}

static inline void free_impl_def_val(impl_def_val *def) {
        free(def->text);
        free(def);
}

typedef struct const_type {
        token_t type;
        char *name;
} const_type;

static inline const_type *init_const_type(token_t type, const char *name) {
        const_type *ct = calloc(1, sizeof(*ct));
        ct->type = type;
        ct->name = strdup(name);
        return ct;
}

static inline void free_const_type(const_type *type) {
        free(type->name);
        free(type);
}

typedef struct constant {
        const_type *type;
        char *name;
        impl_def_val *val;
} constant;

static inline constant *init_constant(const_type *type, const char *name, impl_def_val *val) {
        constant *c = calloc(1, sizeof(*c));
        c->type = type;
        c->name = strdup(name);
        c->val = val;
        return c;
}

static inline void free_constant(constant *constant) {
        free_const_type(constant->type);
        free(constant->name);
        free_impl_def_val(constant->val);
        free(constant);
}

typedef struct constants {
        size_t count;
        constant **list;
} constants;

static inline constants *add_constant(constants *constants, constant *constant) {
        if (!constants) {
                constants = calloc(1, sizeof(*constants));
        }
        constants->list = realloc(constants->list, ++constants->count * sizeof(*constants->list));
        constants->list[constants->count-1] = constant;
        return constants;
}

static inline void free_constants(constants *c) {
        size_t i;

        for (i = 0; i < c->count; ++i) {
                free_constant(c->list[i]);
        }
        free(c->list);
        free(c);
}

typedef struct impl_arg {
        impl_type *type;
        impl_var *var;
        impl_def_val *def;
        impl_val val;
        zval *_zv;
} impl_arg;

static inline impl_arg *init_impl_arg(impl_type *type, impl_var *var, impl_def_val *def) {
        impl_arg *arg = calloc(1, sizeof(*arg));
        arg->type = type;
        arg->var = var;
        arg->def = def;
        return arg;
}

static inline void free_impl_arg(impl_arg *arg) {
        free_impl_type(arg->type);
        free_impl_var(arg->var);
        if (arg->def) {
                free_impl_def_val(arg->def);
        }
        free(arg);
}

typedef struct impl_vararg {
        impl_arg *name;
        struct impl_args *args;
        token_t *types;
        impl_val *values;
        void **free_list;
} impl_vararg;

typedef struct impl_args {
        impl_arg **args;
        size_t count;
        impl_vararg vararg;
} impl_args;

static inline impl_args *init_impl_args(impl_arg *arg) {
        impl_args *args = calloc(1, sizeof(*args));
        if (arg) {
                args->count = 1;
                args->args = calloc(1, sizeof(*args->args));
                args->args[0] = arg;
        }
        return args;
}

static inline impl_args *add_impl_arg(impl_args *args, impl_arg *arg) {
        args->args = realloc(args->args, ++args->count * sizeof(*args->args));
        args->args[args->count-1] = arg;
        return args;
}

static inline void free_impl_args(impl_args *args) {
        size_t i;

        for (i = 0; i < args->count; ++i) {
                free_impl_arg(args->args[i]);
        }
        if (args->vararg.name) {
                free_impl_arg(args->vararg.name);
        }
        free(args->args);
        free(args);
}

typedef struct impl_func {
        PSI_Token *token;
        char *name;
        impl_args *args;
        impl_type *return_type;
        unsigned return_reference:1;
} impl_func;

static inline impl_func *init_impl_func(char *name, impl_args *args, impl_type *type, int ret_reference) {
        impl_func *func = calloc(1, sizeof(*func));
        func->name = strdup(name);
        func->args = args ? args : init_impl_args(NULL);
        func->return_type = type;
        func->return_reference = ret_reference;
        return func;
}

static inline void free_impl_func(impl_func *f) {
        if (f->token) {
                free(f->token);
        }
        free_impl_type(f->return_type);
        free_impl_args(f->args);
        free(f->name);
        free(f);
}

typedef struct num_exp {
        PSI_Token *token;
        token_t t;
        union {
                char *numb;
                constant *cnst;
                decl_var *dvar;
                struct decl_enum_item *enm;
        } u;
        token_t operator;
        int (*calculator)(int t1, impl_val *v1, int t2, impl_val *v2, impl_val *res);
        struct num_exp *operand;
} num_exp;

static inline num_exp *init_num_exp(token_t t, void *num) {
        num_exp *exp = calloc(1, sizeof(*exp));
        switch (exp->t = t) {
        case PSI_T_NUMBER:
        case PSI_T_NSNAME:
                exp->u.numb = strdup(num);
                break;
        case PSI_T_NAME:
                exp->u.dvar = num;
                break;
        EMPTY_SWITCH_DEFAULT_CASE();
        }
        return exp;
}

static inline num_exp *copy_num_exp(num_exp *exp) {
        decl_var *dvar;
        num_exp *num = calloc(1, sizeof(*num));

        memcpy(num, exp, sizeof(*num));

        if (num->token) {
                num->token = PSI_TokenCopy(num->token);
        }
        if (num->operand) {
                num->operand = copy_num_exp(num->operand);
        }
        switch (num->t) {
        case PSI_T_NUMBER:
        case PSI_T_NSNAME:
                num->u.numb = strdup(num->u.numb);
                break;
        case PSI_T_NAME:
                dvar = init_decl_var(num->u.dvar->name, num->u.dvar->pointer_level, num->u.dvar->array_size);
                dvar->arg = num->u.dvar->arg;
                if (num->u.dvar->token) {
                        dvar->token = PSI_TokenCopy(num->u.dvar->token);
                }
                num->u.dvar = dvar;
                break;
        }
        return num;
}

static inline void free_num_exp(num_exp *exp) {
        if (exp->token) {
                free(exp->token);
        }
        switch (exp->t) {
        case PSI_T_NUMBER:
                free(exp->u.numb);
                break;
        case PSI_T_NSNAME:
                break;
        case PSI_T_NAME:
                free_decl_var(exp->u.dvar);
                break;
        case PSI_T_ENUM:
                break;
        EMPTY_SWITCH_DEFAULT_CASE();
        }
        if (exp->operand) {
                free_num_exp(exp->operand);
        }
        free(exp);
}

typedef struct decl_enum_item {
        PSI_Token *token;
        char *name;
        num_exp *num;
        num_exp inc;
        struct decl_enum_item *prev;
} decl_enum_item;

static inline decl_enum_item *init_decl_enum_item(const char *name, num_exp *num) {
        decl_enum_item *i = calloc(1, sizeof(*i));

        i->name = strdup(name);
        i->num = num;
        return i;
}

static inline void free_decl_enum_item(decl_enum_item *i) {
        if (i->token) {
                free(i->token);
        }
        if (i->num && i->num != &i->inc) {
                free_num_exp(i->num);
        }
        free(i->name);
        free(i);
}

typedef struct decl_enum_items {
        decl_enum_item **list;
        size_t count;
} decl_enum_items;

static inline decl_enum_items *init_decl_enum_items(decl_enum_item *i) {
        decl_enum_items *l = calloc(1, sizeof(*l));

        if (i) {
                l->count = 1;
                l->list = calloc(1, sizeof(*l->list));
                l->list[0] = i;
        }
        return l;
}

static inline decl_enum_items *add_decl_enum_item(decl_enum_items *l, decl_enum_item *i) {
        l->list = realloc(l->list, sizeof(*l->list) * (l->count + 1));
        l->list[l->count] = i;
        if (l->count) {
                i->prev = l->list[l->count - 1];
        }
        ++l->count;
        return l;
}

static inline void free_decl_enum_items(decl_enum_items *l) {
        if (l->list) {
                size_t j;

                for (j = 0; j < l->count; ++j) {
                        free_decl_enum_item(l->list[j]);
                }
                free(l->list);
        }
        free(l);
}

typedef struct decl_enum {
        PSI_Token *token;
        char *name;
        decl_enum_items *items;
} decl_enum;

static inline decl_enum *init_decl_enum(const char *name, decl_enum_items *l) {
        decl_enum *e = calloc(1, sizeof(*e));

        e->name = strdup(name);
        e->items = l;
        return e;
}

static inline void free_decl_enum(decl_enum *e) {
        if (e->token) {
                free(e->token);
        }
        if (e->items) {
                free_decl_enum_items(e->items);
        }
        free(e->name);
        free(e);
}

typedef struct decl_enums {
        decl_enum **list;
        size_t count;
} decl_enums;

static inline decl_enums* add_decl_enum(decl_enums *es, decl_enum *e) {
        if (!es) {
                es = calloc(1, sizeof(*es));
        }
        es->list = realloc(es->list, ++es->count * sizeof(*es->list));
        es->list[es->count-1] = e;
        return es;
}

static inline void free_decl_enums(decl_enums *es) {
        if (es->list) {
                size_t j;

                for (j = 0; j < es->count; ++j) {
                        free_decl_enum(es->list[j]);
                }
        }
        free(es->list);
        free(es);
}

typedef struct let_calloc {
        num_exp *nmemb;
        num_exp *size;
} let_calloc;

static inline let_calloc *init_let_calloc(num_exp *nmemb, num_exp *size) {
        let_calloc *alloc = calloc(1, sizeof(*alloc));
        alloc->nmemb = nmemb;
        alloc->size = size;
        return alloc;
}

static inline void free_let_calloc(let_calloc *alloc) {
        free_num_exp(alloc->nmemb);
        free_num_exp(alloc->size);
        free(alloc);
}

typedef struct let_callback {
        struct let_func *func;
        struct set_values *args;
} let_callback;

static inline void free_let_func(struct let_func *func);
static inline void free_set_values(struct set_values *vals);
static inline let_callback *init_let_callback(struct let_func *func, struct set_values *args) {
        let_callback *cb = calloc(1, sizeof(*cb));

        cb->func = func;
        cb->args = args;
        return cb;
}

static inline void free_let_callback(let_callback *cb) {
        free_let_func(cb->func);
        free_set_values(cb->args);
        free(cb);
}

typedef struct let_func {
        token_t type;
        char *name;
        impl_var *var;
        impl_arg *arg;
} let_func;

static inline let_func *init_let_func(token_t type, const char *name, impl_var *var) {
        let_func *func = calloc(1, sizeof(*func));
        func->type = type;
        func->name = strdup(name);
        func->var = var;
        return func;
}

static inline void free_let_func(let_func *func) {
        free_impl_var(func->var);
        free(func->name);
        free(func);
}

#define PSI_LET_REFERENCE 0x1;
typedef struct let_val {
        enum let_val_kind {
                PSI_LET_NULL,
                PSI_LET_NUMEXP,
                PSI_LET_CALLOC,
                PSI_LET_CALLBACK,
                PSI_LET_FUNC,
                PSI_LET_TMP,
        } kind;
        union {
                num_exp *num;
                let_calloc *alloc;
                let_callback *callback;
                let_func *func;
                decl_var *var;
        } data;
        union {
                struct {
                        unsigned is_reference:1;
                } one;
                unsigned all;
        } flags;
} let_val;

static inline let_val *init_let_val(enum let_val_kind kind, void *data) {
        let_val *let = calloc(1, sizeof(*let));
        switch (let->kind = kind) {
        case PSI_LET_NULL:
                break;
        case PSI_LET_NUMEXP:
                let->data.num = data;
                break;
        case PSI_LET_CALLOC:
                let->data.alloc = data;
                break;
        case PSI_LET_CALLBACK:
                let->data.callback = data;
                break;
        case PSI_LET_FUNC:
                let->data.func = data;
                break;
        case PSI_LET_TMP:
                let->data.var = data;
                break;
        EMPTY_SWITCH_DEFAULT_CASE();
        }
        return let;
}

static inline void free_let_val(let_val *let) {
        switch (let->kind) {
        case PSI_LET_NULL:
                break;
        case PSI_LET_NUMEXP:
                free_num_exp(let->data.num);
                break;
        case PSI_LET_CALLOC:
                free_let_calloc(let->data.alloc);
                break;
        case PSI_LET_CALLBACK:
                free_let_callback(let->data.callback);
                break;
        case PSI_LET_FUNC:
                free_let_func(let->data.func);
                break;
        case PSI_LET_TMP:
                free_decl_var(let->data.var);
                break;
        EMPTY_SWITCH_DEFAULT_CASE();
        }
        free(let);
}

typedef struct let_stmt {
        decl_var *var;
        let_val *val;

        void *ptr;
} let_stmt;

static inline let_stmt *init_let_stmt(decl_var *var, let_val *val) {
        let_stmt *let = calloc(1, sizeof(*let));
        let->var = var;
        let->val = val;
        return let;
}

static inline void free_let_stmt(let_stmt *stmt) {
        if (stmt->val) {
                if (stmt->val->kind == PSI_LET_TMP && stmt->var->arg) {
                        free_decl_arg(stmt->var->arg);
                }
                free_let_val(stmt->val);
        }
        free_decl_var(stmt->var);
        free(stmt);
}

struct set_value;

typedef struct set_func {
        PSI_Token *token;
        token_t type;
        char *name;
        void (*handler)(zval *, struct set_value *set, impl_val *ret_val);
} set_func;

static inline set_func *init_set_func(token_t type, const char *name) {
        set_func *func = calloc(1, sizeof(*func));
        func->type = type;
        func->name = strdup(name);
        return func;
}

static inline void free_set_func(set_func *func) {
        if (func->token) {
                free(func->token);
        }
        free(func->name);
        free(func);
}

typedef struct set_value {
        set_func *func;
        decl_vars *vars;
        num_exp *num;
        struct {
                struct set_value *set;
                impl_val *val;
        } outer;
        struct set_values *inner;
} set_value;

typedef struct set_values {
        set_value **vals;
        size_t count;
} set_values;


static inline set_value *init_set_value(set_func *func, decl_vars *vars) {
        set_value *val = calloc(1, sizeof(*val));
        val->func = func;
        val->vars = vars;
        return val;
}
static inline set_value *add_inner_set_value(set_value *val, set_value *inner) {
        val->inner->vals = realloc(val->inner->vals, ++val->inner->count * sizeof(*val->inner->vals));
        val->inner->vals[val->inner->count-1] = inner;
        inner->outer.set = val;
        return val;
}

static inline void free_set_value(set_value *val) {
        if (val->func) {
                free_set_func(val->func);
        }
        if (val->vars) {
                free_decl_vars(val->vars);
        }
        if (val->inner && (!val->outer.set || val->outer.set->inner != val->inner)) {
                size_t i;
                for (i = 0; i < val->inner->count; ++i) {
                        free_set_value(val->inner->vals[i]);
                }
                free(val->inner->vals);
        }
        if (val->num) {
                free_num_exp(val->num);
        }
        free(val);
}

static inline set_values *init_set_values(set_value *val) {
        set_values *vals = calloc(1, sizeof(*vals));
        if (val) {
                vals->count = 1;
                vals->vals = calloc(1, sizeof(val));
                vals->vals[0] = val;
        }
        return vals;
}

static inline set_values *add_set_value(set_values *vals, set_value *val) {
        vals->vals = realloc(vals->vals, ++vals->count * sizeof(val));
        vals->vals[vals->count-1] = val;
        return vals;
}

static inline void free_set_values(set_values *vals) {
        if (vals->vals) {
                free(vals->vals);
        }
        free(vals);
}

typedef struct set_stmt {
        impl_var *var;
        set_value *val;
        impl_arg *arg;
} set_stmt;

static inline set_stmt *init_set_stmt(impl_var *var, set_value *val) {
        set_stmt *set = calloc(1, sizeof(*set));
        set->var = var;
        set->val = val;
        return set;
}

static inline void free_set_stmt(set_stmt *set) {
        free_impl_var(set->var);
        free_set_value(set->val);
        free(set);
}

typedef struct return_stmt {
        PSI_Token *token;
        set_value *set;
        decl_arg *decl;
} return_stmt;

static inline return_stmt *init_return_stmt(set_value *val) {
        return_stmt *ret = calloc(1, sizeof(*ret));
        ret->set = val;
        return ret;
}

static inline void free_return_stmt(return_stmt *ret) {
        if (ret->token) {
                free(ret->token);
        }
        free_set_value(ret->set);
        free(ret);
}

typedef struct free_call {
        PSI_Token *token;
        char *func;
        decl_vars *vars;
        decl *decl;
} free_call;

static inline free_call *init_free_call(const char *func, decl_vars *vars) {
        free_call *f = calloc(1, sizeof(*f));
        f->func = strdup(func);
        f->vars = vars;
        return f;
}

static inline void free_free_call(free_call *f) {
        if (f->token) {
                free(f->token);
        }
        free(f->func);
        free_decl_vars(f->vars);
        free(f);
}

typedef struct free_calls {
        free_call **list;
        size_t count;
} free_calls;

static inline free_calls *init_free_calls(free_call *f) {
        free_calls *fcs = calloc(1, sizeof(*fcs));
        if (f) {
                fcs->count = 1;
                fcs->list = calloc(1, sizeof(*fcs->list));
                fcs->list[0] = f;
        }
        return fcs;
}

static inline void free_free_calls(free_calls *fcs) {
        size_t i;

        for (i = 0; i < fcs->count; ++i) {
                free_free_call(fcs->list[i]);
        }
        free(fcs->list);
        free(fcs);
}

static inline free_calls *add_free_call(free_calls *fcs, free_call *f) {
        fcs->list = realloc(fcs->list, ++fcs->count * sizeof(*fcs->list));
        fcs->list[fcs->count-1] = f;
        return fcs;
}

typedef struct free_stmt {
        free_calls *calls;
} free_stmt;

static inline free_stmt *init_free_stmt(free_calls *calls) {
        free_stmt *f = calloc(1, sizeof(*f));
        f->calls = calls;
        return f;
}

static inline void free_free_stmt(free_stmt *f) {
        free_free_calls(f->calls);
        free(f);
}

typedef struct impl_stmt {
        token_t type;
        union {
                let_stmt *let;
                set_stmt *set;
                return_stmt *ret;
                free_stmt *fre;
                void *ptr;
        } s;
} impl_stmt;

static inline impl_stmt *init_impl_stmt(token_t type, void *ptr) {
        impl_stmt *stmt = calloc(1, sizeof(*stmt));
        stmt->type = type;
        stmt->s.ptr = ptr;
        return stmt;
}

static inline void free_impl_stmt(impl_stmt *stmt) {
        switch (stmt->type) {
        case PSI_T_LET:
                free_let_stmt(stmt->s.let);
                break;
        case PSI_T_SET:
                free_set_stmt(stmt->s.set);
                break;
        case PSI_T_RETURN:
                free_return_stmt(stmt->s.ret);
                break;
        case PSI_T_FREE:
                free_free_stmt(stmt->s.fre);
                break;
        }
        free(stmt);
}

typedef struct impl_stmts {
        struct {
                return_stmt **list;
                size_t count;
        } ret;
        struct {
                let_stmt **list;
                size_t count;
        } let;
        struct {
                set_stmt **list;
                size_t count;
        } set;
        struct {
                free_stmt **list;
                size_t count;
        } fre;
} impl_stmts;

static inline void *add_impl_stmt_ex(void *list, size_t count, void *stmt) {
        list = realloc(list, count * sizeof(list));
        ((void **)list)[count-1] = stmt;
        return list;
}

static inline impl_stmts *add_impl_stmt(impl_stmts *stmts, impl_stmt *stmt) {
        switch (stmt->type) {
        case PSI_T_RETURN:
                stmts->ret.list = add_impl_stmt_ex(stmts->ret.list, ++stmts->ret.count, stmt->s.ret);
                break;
        case PSI_T_LET:
                stmts->let.list = add_impl_stmt_ex(stmts->let.list, ++stmts->let.count, stmt->s.let);
                break;
        case PSI_T_SET:
                stmts->set.list = add_impl_stmt_ex(stmts->set.list, ++stmts->set.count, stmt->s.set);
                break;
        case PSI_T_FREE:
                stmts->fre.list = add_impl_stmt_ex(stmts->fre.list, ++stmts->fre.count, stmt->s.fre);
                break;
        }
        free(stmt);
        return stmts;
}

static inline impl_stmts *init_impl_stmts(impl_stmt *stmt) {
        impl_stmts *stmts = calloc(1, sizeof(*stmts));
        return add_impl_stmt(stmts, stmt);
}

static inline void free_impl_stmts(impl_stmts *stmts) {
        size_t i;

        for (i = 0; i < stmts->let.count; ++i) {
                free_let_stmt(stmts->let.list[i]);
        }
        free(stmts->let.list);
        for (i = 0; i < stmts->ret.count; ++i) {
                free_return_stmt(stmts->ret.list[i]);
        }
        free(stmts->ret.list);
        for (i = 0; i < stmts->set.count; ++i) {
                free_set_stmt(stmts->set.list[i]);
        }
        free(stmts->set.list);
        for (i = 0; i < stmts->fre.count; ++i) {
                free_free_stmt(stmts->fre.list[i]);
        }
        free(stmts->fre.list);
        free(stmts);
}

typedef struct impl {
        impl_func *func;
        impl_stmts *stmts;
        decl *decl;
} impl;

static inline impl *init_impl(impl_func *func, impl_stmts *stmts) {
        impl *i = calloc(1, sizeof(*i));
        i->func = func;
        i->stmts = stmts;
        return i;
}

static inline void free_impl(impl *impl) {
        free_impl_func(impl->func);
        free_impl_stmts(impl->stmts);
        free(impl);
}

typedef struct impls {
        size_t count;
        impl **list;
} impls;

static inline impls *add_impl(impls *impls, impl *impl) {
        if (!impls) {
                impls = calloc(1, sizeof(*impls));
        }
        impls->list = realloc(impls->list, ++impls->count * sizeof(*impls->list));
        impls->list[impls->count-1] = impl;
        return impls;
}

static void free_impls(impls *impls) {
        size_t i;

        for (i = 0; i < impls->count; ++i) {
                free_impl(impls->list[i]);
        }
        free(impls->list);
        free(impls);
}

typedef struct decl_file {
        char *ln;
        char *fn;
} decl_file;

static inline void free_decl_file(decl_file *file) {
        if (file->ln) {
                free(file->ln);
        }
        if (file->fn) {
                free(file->fn);
        }
        memset(file, 0, sizeof(*file));
}

typedef struct decl_libs {
        void **dl;
        size_t count;
} decl_libs;

static inline void free_decl_libs(decl_libs *libs) {
        if (libs->dl) {
                size_t i;
                for (i = 0; i < libs->count; ++i) {
                        if (libs->dl[i]) {
                                dlclose(libs->dl[i]);
                        }
                }
                free(libs->dl);
        }
        memset(libs, 0, sizeof(*libs));
}

static inline void add_decl_lib(decl_libs *libs, void *dlopened) {
        libs->dl = realloc(libs->dl, ++libs->count * sizeof(*libs->dl));
        libs->dl[libs->count-1] = dlopened;
}

static inline impl_val *deref_impl_val(impl_val *ret_val, decl_var *var) {
        unsigned i;

        ZEND_ASSERT(var->arg->var != var);
#if 0
        fprintf(stderr, "deref: %s pl=%u:%u as=%u:%u %p\n",
                        var->name, var->pointer_level, var->arg->var->pointer_level,
                        var->array_size, var->arg->var->array_size, ret_val);
#endif
        for (i = 0; i < var->pointer_level; ++i) {
#if 0
                fprintf(stderr, "-- %p %p %p\n", ret_val, *(void**)ret_val, ret_val->ptr);
#endif
                ret_val = *(void **) ret_val;
        }
        return ret_val;
}

static inline impl_val *enref_impl_val(void *ptr, decl_var *var) {
        impl_val *val, *val_ptr;
        unsigned i;

        ZEND_ASSERT(var->arg->var == var);
#if 0
        fprintf(stderr, "enref: %s pl=%u:%u as=%u:%u\n",
                        var->name, var->pointer_level, var->arg->var->pointer_level,
                        var->array_size, var->arg->var->array_size);
#endif
        if (!var->pointer_level ){//&& real_decl_type(var->arg->type)->type != PSI_T_STRUCT) {
                return ptr;
        }

        val = val_ptr = calloc(var->pointer_level + 1, sizeof(void *));
        for (i = !var->arg->var->array_size; i < var->pointer_level; ++i) {
#if 0
                fprintf(stderr, "++\n");
#endif
                val_ptr->ptr = (void **) val_ptr + 1;
                val_ptr = val_ptr->ptr;
        }
        val_ptr->ptr = ptr;
        return val;
}

static inline impl_val *struct_member_ref(decl_arg *set_arg, impl_val *struct_ptr, impl_val **to_free) {
        void *ptr = (char *) struct_ptr + set_arg->layout->pos;
#if 0
        fprintf(stderr, "struct member %s: %p\n", set_arg->var->name, ptr);
#endif
        return ptr;
}


#define PSI_ERROR 16
#define PSI_WARNING 32
typedef void (*psi_error_cb)(void *context, PSI_Token *token, int type, const char *msg, ...);

#define PSI_DATA(D) ((PSI_Data *) (D))
#define PSI_DATA_MEMBERS \
        constants *consts; \
        decl_typedefs *defs; \
        decl_structs *structs; \
        decl_unions *unions; \
        decl_enums *enums; \
        decls *decls; \
        impls *impls; \
        union { \
                decl_file file; \
                decl_libs libs; \
        } psi; \
        psi_error_cb error; \
        unsigned errors; \
        unsigned flags
typedef struct PSI_Data {
        PSI_DATA_MEMBERS;
} PSI_Data;

static inline PSI_Data *PSI_DataExchange(PSI_Data *dest, PSI_Data *src) {
        if (!dest) {
                dest = malloc(sizeof(*dest));
        }
        memcpy(dest, src, sizeof(*dest));
        memset(src, 0, sizeof(*src));
        return dest;
}

static inline void PSI_DataDtor(PSI_Data *data) {
        if (data->consts) {
                free_constants(data->consts);
        }
        if (data->defs) {
                free_decl_typedefs(data->defs);
        }
        if (data->structs) {
                free_decl_structs(data->structs);
        }
        if (data->unions) {
                free_decl_unions(data->unions);
        }
        if (data->enums) {
                free_decl_enums(data->enums);
        }
        if (data->decls) {
                free_decls(data->decls);
        }
        if (data->impls) {
                free_impls(data->impls);
        }
        free_decl_file(&data->psi.file);
}

typedef struct PSI_Parser {
        PSI_DATA_MEMBERS;
        FILE *fp;
        token_t num;
        void *proc;
        unsigned line, col;
        char *cur, *tok, *lim, *eof, *ctx, *mrk, buf[BSIZE];
} PSI_Parser;

static inline size_t PSI_TokenAllocSize(size_t token_len, size_t fname_len) {
        return sizeof(PSI_Token) + token_len + fname_len + 2;
}

static inline PSI_Token *PSI_TokenAlloc(PSI_Parser *P) {
        PSI_Token *T;
        size_t token_len, fname_len;
        token_t token_typ;

        if (P->cur < P->tok) {
                return NULL;
        }

        token_typ = P->num;
        token_len = P->cur - P->tok;
        fname_len = strlen(P->psi.file.fn);

        T = calloc(1, PSI_TokenAllocSize(token_len, fname_len));
        T->type = token_typ;
        T->size = token_len;
        T->text = &T->buf[0];
        T->file = &T->buf[token_len + 1];
        T->line = P->line;
        T->col = P->col;

        memcpy(T->text, P->tok, token_len);
        memcpy(T->file, P->psi.file.fn, fname_len);

        return T;
}

static inline PSI_Token *PSI_TokenCopy(PSI_Token *src) {
        size_t strct_len = PSI_TokenAllocSize(src->size, strlen(src->file));
        PSI_Token *ptr = malloc(strct_len);

        memcpy(ptr, src, strct_len);

        ptr->text = &ptr->buf[0];
        ptr->file = &ptr->buf[ptr->size + 1];

        return ptr;
}

static inline PSI_Token *PSI_TokenCat(unsigned argc, ...) {
        va_list argv;
        unsigned i;
        PSI_Token *T = NULL;

        va_start(argv, argc);
        for (i = 0; i < argc; ++i) {
                PSI_Token *arg = va_arg(argv, PSI_Token *);

                if (T) {
                        size_t token_len = T->size, fname_len = strlen(T->file);

                        T = realloc(T, PSI_TokenAllocSize(T->size += arg->size + 1, fname_len));
                        T->text = &T->buf[0];
                        T->file = &T->buf[T->size + 1];
                        T->buf[token_len] = ' ';
                        memmove(&T->buf[T->size + 1], &T->buf[token_len + 1], fname_len + 1);
                        memcpy(&T->buf[token_len + 1], arg->text, arg->size + 1);
                } else {
                        T = PSI_TokenCopy(arg);
                        T->type = PSI_T_NAME;
                }
        }
        va_end(argv);

        return T;
}

static inline PSI_Token *PSI_TokenAppend(PSI_Token *T, unsigned argc, ...) {
        va_list argv;
        unsigned i;

        va_start(argv, argc);
        for (i = 0; i < argc; ++i) {
                char *str = va_arg(argv, char *);
                size_t str_len = strlen(str), token_len = T->size, fname_len = strlen(T->file);

                T = realloc(T, PSI_TokenAllocSize(T->size += str_len + 1, fname_len));
                T->text = &T->buf[0];
                T->file = &T->buf[T->size + 1];
                T->buf[token_len] = ' ';
                memmove(&T->buf[T->size + 1], &T->buf[token_len + 1], fname_len + 1);
                memcpy(&T->buf[token_len + 1], str, str_len + 1);
        }
        va_end(argv);

        return T;
}

char *php_strtr(char *str, size_t len, char *str_from, char *str_to, size_t trlen);
static inline PSI_Token *PSI_TokenTranslit(PSI_Token *T, char *from, char *to) {
        php_strtr(T->text, T->size, from, to, MIN(strlen(from), strlen(to)));
        return T;
}

static inline uint64_t psi_hash(char *digest_buf, ...)
{
    uint64_t hash = 5381;
    uint8_t c;
    const uint8_t *ptr;
    va_list argv;

    va_start(argv, digest_buf);
    while ((ptr = va_arg(argv, const uint8_t *))) {
                while ((c = *ptr++)) {
                        hash = ((hash << 5) + hash) + c;
                }
    }
    va_end(argv);

    if (digest_buf) {
        sprintf(digest_buf, "%" PRIx64, hash);
    }

    return hash;
}

static inline uint64_t PSI_TokenHash(PSI_Token *t, char *digest_buf) {
        char loc_buf[48];

        sprintf(loc_buf, "%u%u", t->line, t->col);
        return psi_hash(digest_buf, t->file, loc_buf, NULL);
}

#define PSI_PARSER_DEBUG 0x1
#define PSI_PARSER_SILENT 0x2

PSI_Parser *PSI_ParserInit(PSI_Parser *P, const char *filename, psi_error_cb error, unsigned flags);
void PSI_ParserSyntaxError(PSI_Parser *P, const char *fn, size_t ln, const char *msg, ...);
size_t PSI_ParserFill(PSI_Parser *P, size_t n);
token_t PSI_ParserScan(PSI_Parser *P);
void PSI_ParserParse(PSI_Parser *P, PSI_Token *src);
void PSI_ParserDtor(PSI_Parser *P);
void PSI_ParserFree(PSI_Parser **P);

#endif