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/*
* Copyright © 2022 Michael Smith <mikesmiffy128@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../os.h"
#include "cmeta.h"
#include "skiplist.h"
#include "vec.h"
#define MAXENT 65536 // arbitrary limit!
static struct ent {
const char *name;
bool unreg;
bool isvar; // false for cmd
} ents[MAXENT];
static int nents;
static void die(const char *s) {
fprintf(stderr, "codegen: %s\n", s);
exit(100);
}
#define PUT(name_, isvar_, unreg_) do { \
if (nents == sizeof(ents) / sizeof(*ents)) { \
fprintf(stderr, "codegen: out of space; make ents bigger!\n"); \
exit(1); \
} \
ents[nents].name = name_; \
ents[nents].isvar = isvar_; ents[nents++].unreg = unreg_; \
} while (0)
static void oncondef(const char *name, bool isvar, bool unreg) {
PUT(name, isvar, unreg);
}
struct vec_str VEC(const char *);
DECL_SKIPLIST(static, event, struct event, const char *, 4)
struct event {
const char *name;
struct vec_str handlers;
struct skiplist_hdr_event hdr;
};
static inline int cmp_event(struct event *e, const char *s) {
return strcmp(e->name, s);
}
static inline struct skiplist_hdr_event *hdr_event(struct event *e) {
return &e->hdr;
}
DEF_SKIPLIST(static, event, cmp_event, hdr_event)
struct skiplist_hdr_event events = {0};
static void onevdef(const char *name) {
struct event *e = skiplist_get_event(&events, name);
if (!e) {
struct event *e = malloc(sizeof(*e));
if (!e) die("couldn't allocate memory");
e->name = name;
e->handlers = (struct vec_str){0};
e->hdr = (struct skiplist_hdr_event){0};
skiplist_insert_event(&events, name, e);
}
else {
fprintf(stderr, "codegen: error: duplicate event definition `%s`\n",
name);
exit(2);
}
}
static void onevhandler(const char *evname, const char *modname) {
struct event *e = skiplist_get_event(&events, evname);
if (!e) {
fprintf(stderr, "codegen: error: module `%s` trying to handle "
"non-existent event `%s`\n", modname, evname);
exit(2);
}
// NOTE: not bothering to check for more than one handler in a file.
// compiler will get that anyway.
if (!vec_push(&e->handlers, modname)) die("couldn't allocate memory");
}
#define _(x) \
if (fprintf(out, "%s\n", x) < 0) die("couldn't write to file");
#define F(f, ...) \
if (fprintf(out, f "\n", __VA_ARGS__) < 0) die("couldn't write to file");
#define H() \
_( "/* This file is autogenerated by src/build/codegen.c. DO NOT EDIT! */") \
_( "")
struct passinfo {
const struct cmeta *cm;
const os_char *path;
};
struct vec_passinfo VEC(struct passinfo) pass2 = {0};
int OS_MAIN(int argc, os_char *argv[]) {
for (++argv; *argv; ++argv) {
const struct cmeta *cm = cmeta_loadfile(*argv);
cmeta_conmacros(cm, &oncondef);
cmeta_evdefmacros(cm, &onevdef);
if (!vec_push(&pass2, ((struct passinfo){cm, *argv}))) {
die("couldn't allocate memory");
}
}
// we have to a second pass for event handlers. also, there's a bunch of
// terrible garbage here. don't stare for too long...
for (struct passinfo *pi = pass2.data; pi - pass2.data < pass2.sz; ++pi) {
// XXX: I guess we should cache these by name or something!
const struct cmeta *cm = pi->cm;
#ifdef _WIN32
int arglen = wcslen(pi->path);
char *p = malloc(arglen + 1);
if (!p) die("couldn't allocate string");
// XXX: Unicode isn't real, it can't hurt you.
for (const ushort *q = pi->path; q - pi->path < arglen; ++q) {
p[q - pi->path] = *q; // ugh this is stupid
}
p[arglen] = '\0';
#else
const char *p = p->path;
#endif
const char *lastslash = p - 1;
for (; *p; ++p) {
#ifdef _WIN32
if (*p == '/' || *p == '\\') {
#else
if (*p == '/') {
#endif
lastslash = p;
}
}
int len = strlen(lastslash + 1);
if (len <= 3 || lastslash[len - 1] != '.' || lastslash[len] != 'c') {
fprintf(stderr, "filenames should end in .c probably\n");
exit(2);
}
char *modname = malloc(len - 1);
if (!modname) die("couldn't allocate string");
memcpy(modname, lastslash + 1, len - 2);
modname[len - 2] = '\0';
// ugh. same dumb hacks from compile scripts
if (!strcmp(modname, "con_")) {
free(modname); // might as well
modname = "con";
}
else if (!strcmp(modname, "sst")) {
continue; // I guess???
}
cmeta_evhandlermacros(cm, modname, &onevhandler);
}
FILE *out = fopen(".build/include/cmdinit.gen.h", "wb");
if (!out) die("couldn't open cmdinit.gen.h");
H();
for (const struct ent *p = ents; p - ents < nents; ++p) {
F( "extern struct con_%s *%s;", p->isvar ? "var" : "cmd", p->name)
}
_( "")
_( "static void regcmds(void) {")
for (const struct ent *p = ents; p - ents < nents; ++p) {
if (p->isvar) {
F( " initval(%s);", p->name)
}
if (!p->unreg) {
F( " con_reg(%s);", p->name)
}
}
_( "}")
_( "")
_( "static void freevars(void) {")
for (const struct ent *p = ents; p - ents < nents; ++p) {
if (p->isvar) {
F( " extfree(%s->strval);", p->name);
}
}
_( "}")
if (fclose(out) == EOF) die("couldn't fully write cmdinit.gen.h");
out = fopen(".build/include/evglue.gen.h", "wb");
if (!out) die("couldn't open evglue.gen.h");
H()
for (const struct event *e = events.x[0]; e; e = e->hdr.x[0]) {
F( "void _evemit_%s(void) {", e->name)
for (const char **pp = e->handlers.data;
pp - e->handlers.data < e->handlers.sz; ++pp) {
F( " void _evhandler_%s_%s(void);", *pp, e->name); // blegh.
F( " _evhandler_%s_%s();", *pp, e->name);
}
_( "}")
}
if (fclose(out) == EOF) die("couldn't fully write evglue.gen.h");
return 0;
}
// vi: sw=4 ts=4 noet tw=80 cc=80
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