145 lines
2.5 KiB
C
145 lines
2.5 KiB
C
#ifndef NANOWASM_TYPES_H
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#define NANOWASM_TYPES_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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union nw_value
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{
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long i32;
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long long i64;
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float f32;
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double f64;
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/* TODO: define {de}serialization between Wasm and host. */
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void *p;
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};
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enum nw_kind
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{
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NW_KIND_FUNCTION,
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NW_KIND_TABLE,
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NW_KIND_MEMORY,
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NW_KIND_GLOBAL
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};
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struct nw_args
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{
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const union nw_value *args;
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size_t n;
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};
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struct nw_mod_cfg
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{
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const struct nw_import
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{
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enum nw_kind kind;
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const char *module, *field;
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union
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{
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struct
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{
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/* This must follow the format below, whitespace ignored:
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* [return type]([param type][, ...])
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* For convenience, the interpreter can do automatic checks on
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* pointer arguments and/or return values if using '*' as type.
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* Examples:
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* "()"
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* "i32(f32)"
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* "*(f64, i32, *, i64)"
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* As per WebAssembly MVP spec, multiple return types are not
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* supported yet. */
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const char *signature;
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int (*fn)(const struct nw_args *params,
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union nw_value *ret, void *user);
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} function;
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} u;
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} *imports;
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size_t n_imports;
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const char *path;
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void *user;
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};
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struct nw_mod
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{
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struct
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{
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long type, import, function, table, memory, global, export,
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start, element, code, data;
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} sections;
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struct nw_mod_cfg cfg;
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};
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struct nw_buf
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{
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void *buf;
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size_t n;
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};
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struct nw_inst_cfg
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{
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struct
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{
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union nw_value *buf;
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size_t n;
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} args;
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struct nw_buf stack, heap;
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const struct nw_mod *m;
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};
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enum nw_state
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{
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NW_STATE_AGAIN,
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NW_STATE_RETURNED,
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NW_STATE_EXCEPTION,
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NW_STATE_FATAL
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};
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struct nw_inst
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{
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struct nw_interp
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{
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FILE *f;
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const char *exception;
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bool exit;
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struct
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{
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union nw_value *buf;
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size_t n;
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} args;
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struct
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{
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struct nw_buf buf;
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size_t i;
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} stack, heap;
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} interp;
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union nw_inst_state
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{
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int retval;
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const char *exception;
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} state;
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struct nw_inst_cfg cfg;
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};
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#define NW_BUF(sz) {.buf = (char[sz]){0}, .n = sz}
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#define NW_ARGS(sz) {.buf = (union nw_value[sz]){0}, .n = sz}
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#ifdef __cplusplus
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}
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#endif
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#endif
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