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zsh/Src/module.c
Oliver Kiddle ddd8614e51 AIX dependency fixes
2000-04-30 17:58:35 +00:00

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/*
* module.c - deal with dynamic modules
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 1996-1997 Zoltán Hidvégi
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Zoltán Hidvégi or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Zoltán Hidvégi and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Zoltán Hidvégi and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Zoltán Hidvégi and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/
#include "zsh.mdh"
#include "module.pro"
/* List of linked-in modules. */
/**/
LinkList linkedmodules;
/* The `zsh/main' module contains all the base code that can't actually be *
* built as a separate module. It is initialised by main(), so there's *
* nothing for the boot function to do. */
/**/
int
setup_(Module m)
{
return 0;
}
/**/
int
boot_(Module m)
{
return 0;
}
/**/
int
cleanup_(Module m)
{
return 0;
}
/**/
int
finish_(Module m)
{
return 0;
}
/* This registers a builtin module. */
/**/
void
register_module(char *n, Module_func setup, Module_func boot,
Module_func cleanup, Module_func finish)
{
Linkedmod m;
m = (Linkedmod) zalloc(sizeof(*m));
m->name = ztrdup(n);
m->setup = setup;
m->boot = boot;
m->cleanup = cleanup;
m->finish = finish;
zaddlinknode(linkedmodules, m);
}
/* Check if a module is linked in. */
/**/
Linkedmod
module_linked(char const *name)
{
LinkNode node;
for (node = firstnode(linkedmodules); node; incnode(node))
if (!strcmp(((Linkedmod) getdata(node))->name, name))
return (Linkedmod) getdata(node);
return NULL;
}
/* addbuiltin() can be used to add a new builtin. It returns zero on *
* success, 1 on failure. The only possible type of failure is that *
* a builtin with the specified name already exists. An autoloaded *
* builtin can be replaced using this function. */
/**/
int
addbuiltin(Builtin b)
{
Builtin bn = (Builtin) builtintab->getnode2(builtintab, b->nam);
if (bn && (bn->flags & BINF_ADDED))
return 1;
if (bn)
builtintab->freenode(builtintab->removenode(builtintab, b->nam));
builtintab->addnode(builtintab, b->nam, b);
return 0;
}
/* Add multiple builtins. binl points to a table of `size' builtin *
* structures. Those for which (.flags & BINF_ADDED) is false are to be *
* added; that flag is set if they succeed. If any fail, an error *
* message is printed, using nam as the leading name. Returns 1 if all *
* additions succeed, 2 if some succeed and some fail, and 0 if all (and *
* at least 1) fail. The usual usage in a boot_*() function would be *
* return !addbuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab)); */
/**/
mod_export int
addbuiltins(char const *nam, Builtin binl, int size)
{
int hads = 0, hadf = 0, n;
for(n = 0; n < size; n++) {
Builtin b = &binl[n];
if(b->flags & BINF_ADDED)
continue;
if(addbuiltin(b)) {
zwarnnam(nam, "name clash when adding builtin `%s'", b->nam, 0);
hadf = 1;
} else {
b->flags |= BINF_ADDED;
hads = 2;
}
}
return hadf ? hads : 1;
}
/* The list of function wrappers defined. */
/**/
FuncWrap wrappers;
/* This adds a definition for a wrapper. Return value is one in case of *
* error and zero if all went fine. */
/**/
mod_export int
addwrapper(Module m, FuncWrap w)
{
FuncWrap p, q;
if (w->flags & WRAPF_ADDED)
return 1;
for (p = wrappers, q = NULL; p; q = p, p = p->next);
if (q)
q->next = w;
else
wrappers = w;
w->next = NULL;
w->flags |= WRAPF_ADDED;
w->module = m;
return 0;
}
/* $module_path ($MODULE_PATH) */
/**/
char **module_path;
/* List of modules */
/**/
mod_export LinkList modules;
/* Define an autoloadable builtin. It returns 0 on success, or 1 on *
* failure. The only possible cause of failure is that a builtin *
* with the specified name already exists. */
/**/
int
add_autobin(char *nam, char *module)
{
Builtin bn = zcalloc(sizeof(*bn));
bn->nam = ztrdup(nam);
bn->optstr = ztrdup(module);
return addbuiltin(bn);
}
/* Remove the builtin added previously by addbuiltin(). Returns *
* zero on succes and -1 if there is no builtin with that name. */
/**/
int
deletebuiltin(char *nam)
{
Builtin bn;
bn = (Builtin) builtintab->removenode(builtintab, nam);
if (!bn)
return -1;
builtintab->freenode((HashNode)bn);
return 0;
}
/* Delete multiple builtins. binl points to a table of `size' builtin *
* structures. Those for which (.flags & BINF_ADDED) is true are to be *
* deleted; that flag is cleared. If any fail, an error message is *
* printed, using nam as the leading name. Returns 1 if all deletions *
* succeed, 2 if some succeed and some fail, and 0 if all (and at least *
* 1) fail. In normal use, from a cleanup_*() function, this return *
* value would be ignored -- the only cause of failure would be that a *
* wayward module had deleted our builtin without telling us. */
/**/
mod_export int
deletebuiltins(char const *nam, Builtin binl, int size)
{
int hads = 0, hadf = 0, n;
for(n = 0; n < size; n++) {
Builtin b = &binl[n];
if(!(b->flags & BINF_ADDED))
continue;
if(deletebuiltin(b->nam)) {
zwarnnam(nam, "builtin `%s' already deleted", b->nam, 0);
hadf = 1;
} else
hads = 2;
b->flags &= ~BINF_ADDED;
}
return hadf ? hads : 1;
}
/* This removes the given wrapper definition from the list. Returned is *
* one in case of error and zero otherwise. */
/**/
mod_export int
deletewrapper(Module m, FuncWrap w)
{
FuncWrap p, q;
if (w->flags & WRAPF_ADDED) {
for (p = wrappers, q = NULL; p && p != w; q = p, p = p->next);
if (p) {
if (q)
q->next = p->next;
else
wrappers = p->next;
p->flags &= ~WRAPF_ADDED;
return 0;
}
}
return 1;
}
/**/
#ifdef DYNAMIC
/**/
#ifdef AIXDYNAMIC
#include <sys/ldr.h>
static char *dlerrstr[256];
static void *
load_and_bind(const char *fn)
{
void *ret = (void *) load((char *) fn, L_NOAUTODEFER, NULL);
if (ret) {
LinkNode node;
int err = loadbind(0, (void *) addbuiltin, ret);
for (node = firstnode(modules); !err && node; incnode(node)) {
Module m = (Module) getdata(node);
if (m->u.handle && !(m->flags & MOD_LINKED))
err |= loadbind(0, m->u.handle, ret);
}
if (err) {
loadquery(L_GETMESSAGES, dlerrstr, sizeof(dlerrstr));
unload(ret);
ret = NULL;
}
} else
loadquery(L_GETMESSAGES, dlerrstr, sizeof(dlerrstr));
return ret;
}
#define dlopen(X,Y) load_and_bind(X)
#define dlclose(X) unload(X)
#define dlerror() (dlerrstr[0])
/**/
#else
#ifdef HAVE_DLFCN_H
# if defined(HAVE_DL_H) && defined(__hpux)
# include <dl.h>
# else
# include <dlfcn.h>
# endif
#else
# ifdef HAVE_DL_H
# include <dl.h>
# define RTLD_LAZY BIND_DEFERRED
# define RTLD_GLOBAL DYNAMIC_PATH
# else
# include <sys/types.h>
# include <nlist.h>
# include <link.h>
# endif
#endif
/**/
#ifdef HPUXDYNAMIC
# define dlopen(file,mode) (void *)shl_load((file), (mode), (long) 0)
# define dlclose(handle) shl_unload((shl_t)(handle))
static
void *
hpux_dlsym(void *handle, char *name)
{
void *sym_addr;
if (!shl_findsym((shl_t *)&handle, name, TYPE_UNDEFINED, &sym_addr))
return sym_addr;
return NULL;
}
# define dlsym(handle,name) hpux_dlsym(handle,name)
# define dlerror() 0
#else
# ifndef HAVE_DLCLOSE
# define dlclose(X) ((X), 0)
# endif
/**/
#endif
#ifdef DLSYM_NEEDS_UNDERSCORE
# define STR_SETUP "_setup_"
# define STR_BOOT "_boot_"
# define STR_CLEANUP "_cleanup_"
# define STR_FINISH "_finish_"
#else /* !DLSYM_NEEDS_UNDERSCORE */
# define STR_SETUP "setup_"
# define STR_BOOT "boot_"
# define STR_CLEANUP "cleanup_"
# define STR_FINISH "finish_"
#endif /* !DLSYM_NEEDS_UNDERSCORE */
/**/
#endif /* !AIXDYNAMIC */
#ifndef RTLD_LAZY
# define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
# define RTLD_GLOBAL 0
#endif
/**/
static void *
try_load_module(char const *name)
{
char buf[PATH_MAX + 1];
char **pp;
void *ret = NULL;
int l;
l = 1 + strlen(name) + 1 + strlen(DL_EXT);
for (pp = module_path; !ret && *pp; pp++) {
if (l + (**pp ? strlen(*pp) : 1) > PATH_MAX)
continue;
sprintf(buf, "%s/%s.%s", **pp ? *pp : ".", name, DL_EXT);
ret = dlopen(unmeta(buf), RTLD_LAZY | RTLD_GLOBAL);
}
return ret;
}
/**/
static void *
do_load_module(char const *name)
{
void *ret;
ret = try_load_module(name);
if (!ret) {
int waserr = errflag;
zerr("failed to load module: %s", name, 0);
errflag = waserr;
}
return ret;
}
/**/
#else /* !DYNAMIC */
/**/
static void *
do_load_module(char const *name)
{
int waserr = errflag;
zerr("failed to load module: %s", name, 0);
errflag = waserr;
return NULL;
}
/**/
#endif /* !DYNAMIC */
/**/
static LinkNode
find_module(const char *name)
{
Module m;
LinkNode node;
for (node = firstnode(modules); node; incnode(node)) {
m = (Module) getdata(node);
if (!strcmp(m->nam, name))
return node;
}
return NULL;
}
/**/
mod_export int
module_loaded(const char *name)
{
LinkNode node;
Module m;
return ((node = find_module(name)) &&
(m = ((Module) getdata(node)))->u.handle &&
!(m->flags & MOD_UNLOAD));
}
/**/
#ifdef DYNAMIC
/**/
#ifdef AIXDYNAMIC
/**/
static int
dyn_setup_module(Module m)
{
return ((int (*)_((int,Module))) m->u.handle)(0, m);
}
/**/
static int
dyn_boot_module(Module m)
{
return ((int (*)_((int,Module))) m->u.handle)(1, m);
}
/**/
static int
dyn_cleanup_module(Module m)
{
return ((int (*)_((int,Module))) m->u.handle)(2, m);
}
/**/
static int
dyn_finish_module(Module m)
{
return ((int (*)_((int,Module))) m->u.handle)(3, m);
}
/**/
#else
static Module_func
module_func(Module m, char *name)
{
#ifdef DYNAMIC_NAME_CLASH_OK
return (Module_func) dlsym(m->u.handle, name);
#else /* !DYNAMIC_NAME_CLASH_OK */
VARARR(char, buf, strlen(name) + strlen(m->nam)*2 + 1);
char const *p;
char *q;
strcpy(buf, name);
q = strchr(buf, 0);
for(p = m->nam; *p; p++) {
if(*p == '/') {
*q++ = 'Q';
*q++ = 's';
} else if(*p == '_') {
*q++ = 'Q';
*q++ = 'u';
} else if(*p == 'Q') {
*q++ = 'Q';
*q++ = 'q';
} else
*q++ = *p;
}
*q = 0;
return (Module_func) dlsym(m->u.handle, buf);
#endif /* !DYNAMIC_NAME_CLASH_OK */
}
/**/
static int
dyn_setup_module(Module m)
{
Module_func fn = module_func(m, STR_SETUP);
if (fn)
return fn(m);
zwarnnam(m->nam, "no setup function", NULL, 0);
return 1;
}
/**/
static int
dyn_boot_module(Module m)
{
Module_func fn = module_func(m, STR_BOOT);
if(fn)
return fn(m);
zwarnnam(m->nam, "no boot function", NULL, 0);
return 1;
}
/**/
static int
dyn_cleanup_module(Module m)
{
Module_func fn = module_func(m, STR_CLEANUP);
if(fn)
return fn(m);
zwarnnam(m->nam, "no cleanup function", NULL, 0);
return 1;
}
/* Note that this function does more than just calling finish_foo(), *
* it really unloads the module. */
/**/
static int
dyn_finish_module(Module m)
{
Module_func fn = module_func(m, STR_FINISH);
int r;
if (fn)
r = fn(m);
else {
zwarnnam(m->nam, "no finish function", NULL, 0);
r = 1;
}
dlclose(m->u.handle);
return r;
}
/**/
#endif /* !AIXDYNAMIC */
/**/
static int
setup_module(Module m)
{
return ((m->flags & MOD_LINKED) ?
(m->u.linked->setup)(m) : dyn_setup_module(m));
}
/**/
static int
boot_module(Module m)
{
return ((m->flags & MOD_LINKED) ?
(m->u.linked->boot)(m) : dyn_boot_module(m));
}
/**/
static int
cleanup_module(Module m)
{
return ((m->flags & MOD_LINKED) ?
(m->u.linked->cleanup)(m) : dyn_cleanup_module(m));
}
/**/
static int
finish_module(Module m)
{
return ((m->flags & MOD_LINKED) ?
(m->u.linked->finish)(m) : dyn_finish_module(m));
}
/**/
#else /* !DYNAMIC */
/**/
static int
setup_module(Module m)
{
return ((m->flags & MOD_LINKED) ? (m->u.linked->setup)(m) : 1);
}
/**/
static int
boot_module(Module m)
{
return ((m->flags & MOD_LINKED) ? (m->u.linked->boot)(m) : 1);
}
/**/
static int
cleanup_module(Module m)
{
return ((m->flags & MOD_LINKED) ? (m->u.linked->cleanup)(m) : 1);
}
/**/
static int
finish_module(Module m)
{
return ((m->flags & MOD_LINKED) ? (m->u.linked->finish)(m) : 1);
}
/**/
#endif /* !DYNAMIC */
/**/
static int
modname_ok(char const *p)
{
do {
if(*p != '_' && !ialnum(*p))
return 0;
do {
p++;
} while(*p == '_' || ialnum(*p));
if(!*p)
return 1;
} while(*p++ == '/');
return 0;
}
/**/
mod_export int
load_module(char const *name)
{
Module m;
void *handle = NULL;
Linkedmod linked;
LinkNode node, n;
int set;
if (!modname_ok(name)) {
zerr("invalid module name `%s'", name, 0);
return 0;
}
if (!(node = find_module(name))) {
if (!(linked = module_linked(name)) &&
!(handle = do_load_module(name)))
return 0;
m = zcalloc(sizeof(*m));
m->nam = ztrdup(name);
if (handle) {
m->u.handle = handle;
m->flags |= MOD_SETUP;
} else {
m->u.linked = linked;
m->flags |= MOD_SETUP | MOD_LINKED;
}
node = zaddlinknode(modules, m);
if ((set = setup_module(m)) || boot_module(m)) {
if (!set)
finish_module(m);
remnode(modules, node);
zsfree(m->nam);
zfree(m, sizeof(*m));
m->flags &= ~MOD_SETUP;
return 0;
}
m->flags |= MOD_INIT_S | MOD_INIT_B;
m->flags &= ~MOD_SETUP;
return 1;
}
m = (Module) getdata(node);
if (m->flags & MOD_SETUP)
return 1;
if (m->flags & MOD_UNLOAD)
m->flags &= ~MOD_UNLOAD;
else if ((m->flags & MOD_LINKED) ? m->u.linked : m->u.handle)
return 1;
if (m->flags & MOD_BUSY) {
zerr("circular dependencies for module %s", name, 0);
return 0;
}
m->flags |= MOD_BUSY;
if (m->deps)
for (n = firstnode(m->deps); n; incnode(n))
if (!load_module((char *) getdata(n))) {
m->flags &= ~MOD_BUSY;
return 0;
}
m->flags &= ~MOD_BUSY;
if (!m->u.handle) {
handle = NULL;
if (!(linked = module_linked(name)) &&
!(handle = do_load_module(name)))
return 0;
if (handle) {
m->u.handle = handle;
m->flags |= MOD_SETUP;
} else {
m->u.linked = linked;
m->flags |= MOD_SETUP | MOD_LINKED;
}
if (setup_module(m)) {
if (handle)
m->u.handle = NULL;
else
m->u.linked = NULL;
m->flags &= ~MOD_SETUP;
return 0;
}
m->flags |= MOD_INIT_S;
}
m->flags |= MOD_SETUP;
if (boot_module(m)) {
finish_module(m);
if (m->flags & MOD_LINKED)
m->u.linked = NULL;
else
m->u.handle = NULL;
m->flags &= ~MOD_SETUP;
return 0;
}
m->flags |= MOD_INIT_B;
m->flags &= ~MOD_SETUP;
return 1;
}
/* This ensures that the module with the name given as the second argument
* is loaded.
* The third argument should be non-zero if the function should complain
* about trying to load a module with a full path name in restricted mode.
* The last argument should be non-zero if this function should signal an
* error if the module is already loaded.
* The return value is non-zero if the module was found or loaded. */
/**/
mod_export int
require_module(char *nam, char *module, int res, int test)
{
Module m = NULL;
LinkNode node;
/* First see if the module is linked in. */
for (node = firstnode(linkedmodules); node; incnode(node)) {
if (!strcmp((char *) getdata(node), nam))
return 1;
}
node = find_module(module);
if (node && (m = ((Module) getdata(node)))->u.handle &&
!(m->flags & MOD_UNLOAD)) {
if (test) {
zwarnnam(nam, "module %s already loaded.", module, 0);
return 0;
}
} else
return load_module(module);
return 1;
}
/**/
void
add_dep(char *name, char *from)
{
LinkNode node;
Module m;
if (!(node = find_module(name))) {
m = zcalloc(sizeof(*m));
m->nam = ztrdup(name);
zaddlinknode(modules, m);
} else
m = (Module) getdata(node);
if (!m->deps)
m->deps = znewlinklist();
for (node = firstnode(m->deps);
node && strcmp((char *) getdata(node), from);
incnode(node));
if (!node)
zaddlinknode(m->deps, ztrdup(from));
}
/**/
static void
autoloadscan(HashNode hn, int printflags)
{
Builtin bn = (Builtin) hn;
if(bn->flags & BINF_ADDED)
return;
if(printflags & PRINT_LIST) {
fputs("zmodload -ab ", stdout);
if(bn->optstr[0] == '-')
fputs("-- ", stdout);
quotedzputs(bn->optstr, stdout);
if(strcmp(bn->nam, bn->optstr)) {
putchar(' ');
quotedzputs(bn->nam, stdout);
}
} else {
nicezputs(bn->nam, stdout);
if(strcmp(bn->nam, bn->optstr)) {
fputs(" (", stdout);
nicezputs(bn->optstr, stdout);
putchar(')');
}
}
putchar('\n');
}
/**/
int
bin_zmodload(char *nam, char **args, char *ops, int func)
{
if ((ops['b'] || ops['c'] || ops['p'] || ops['f']) &&
!(ops['a'] || ops['u'])) {
zwarnnam(nam, "-b, -c, -f, and -p must be combined with -a or -u",
NULL, 0);
return 1;
}
if (ops['d'] && ops['a']) {
zwarnnam(nam, "-d cannot be combined with -a", NULL, 0);
return 1;
}
if (ops['u'] && !*args) {
zwarnnam(nam, "what do you want to unload?", NULL, 0);
return 1;
}
if (ops['e'] && (ops['I'] || ops['L'] || ops['a'] || ops['d'] ||
ops['i'] || ops['u'])) {
zwarnnam(nam, "-e cannot be combined with other options", NULL, 0);
return 1;
}
if (ops['e'])
return bin_zmodload_exist(nam, args, ops);
else if (ops['d'])
return bin_zmodload_dep(nam, args, ops);
else if ((ops['a'] || ops['b']) && !(ops['c'] || ops['p'] || ops['f']))
return bin_zmodload_auto(nam, args, ops);
else if (ops['c'] && !(ops['b'] || ops['p']))
return bin_zmodload_cond(nam, args, ops);
else if (ops['f'] && !(ops['b'] || ops['p']))
return bin_zmodload_math(nam, args, ops);
else if (ops['p'] && !(ops['b'] || ops['c']))
return bin_zmodload_param(nam, args, ops);
else if (!(ops['a'] || ops['b'] || ops['c'] || ops['p']))
return bin_zmodload_load(nam, args, ops);
else
zwarnnam(nam, "use only one of -b, -c, or -p", NULL, 0);
return 1;
}
/**/
static int
bin_zmodload_exist(char *nam, char **args, char *ops)
{
LinkNode node;
Module m;
if (!*args) {
for (node = firstnode(modules); node; incnode(node)) {
m = (Module) getdata(node);
if (m->u.handle && !(m->flags & MOD_UNLOAD)) {
nicezputs(m->nam, stdout);
putchar('\n');
}
}
return 0;
} else {
int ret = 0, f;
for (; !ret && *args; args++) {
f = 0;
for (node = firstnode(modules);
!f && node; incnode(node)) {
m = (Module) getdata(node);
if (m->u.handle && !(m->flags & MOD_UNLOAD))
f = !strcmp(*args, m->nam);
}
ret = !f;
}
return ret;
}
}
/**/
static int
bin_zmodload_dep(char *nam, char **args, char *ops)
{
LinkNode node;
Module m;
if(ops['u']) {
/* remove dependencies */
char *tnam = *args++;
node = find_module(tnam);
if (!node)
return 0;
m = (Module) getdata(node);
if(*args && m->deps) {
do {
for(node = firstnode(m->deps); node; incnode(node))
if(!strcmp(*args, getdata(node))) {
zsfree(getdata(node));
remnode(m->deps, node);
break;
}
} while(*++args);
if(empty(m->deps)) {
freelinklist(m->deps, freestr);
m->deps = NULL;
}
} else {
if (m->deps) {
freelinklist(m->deps, freestr);
m->deps = NULL;
}
}
if (!m->deps && !m->u.handle) {
remnode(modules, node);
zsfree(m->nam);
zfree(m, sizeof(*m));
}
return 0;
} else if(!args[0] || !args[1]) {
/* list dependencies */
for (node = firstnode(modules); node; incnode(node)) {
m = (Module) getdata(node);
if (m->deps && (!args[0] || !strcmp(args[0], m->nam))) {
LinkNode n;
if(ops['L']) {
printf("zmodload -d ");
if(m->nam[0] == '-')
fputs("-- ", stdout);
quotedzputs(m->nam, stdout);
} else {
nicezputs(m->nam, stdout);
putchar(':');
}
for (n = firstnode(m->deps); n; incnode(n)) {
putchar(' ');
if(ops['L'])
quotedzputs((char *) getdata(n), stdout);
else
nicezputs((char *) getdata(n), stdout);
}
putchar('\n');
}
}
return 0;
} else {
/* add dependencies */
int ret = 0;
char *tnam = *args++;
for(; *args; args++)
add_dep(tnam, *args);
return ret;
}
}
/**/
static int
bin_zmodload_auto(char *nam, char **args, char *ops)
{
int ret = 0;
if(ops['u']) {
/* remove autoloaded builtins */
for (; *args; args++) {
Builtin bn = (Builtin) builtintab->getnode2(builtintab, *args);
if (!bn) {
if(!ops['i']) {
zwarnnam(nam, "%s: no such builtin", *args, 0);
ret = 1;
}
} else if (bn->flags & BINF_ADDED) {
zwarnnam(nam, "%s: builtin is already defined", *args, 0);
ret = 1;
} else
deletebuiltin(*args);
}
return ret;
} else if(!*args) {
/* list autoloaded builtins */
scanhashtable(builtintab, 0, 0, 0,
autoloadscan, ops['L'] ? PRINT_LIST : 0);
return 0;
} else {
/* add autoloaded builtins */
char *modnam;
modnam = *args++;
do {
char *bnam = *args ? *args++ : modnam;
if (strchr(bnam, '/')) {
zwarnnam(nam, "%s: `/' is illegal in a builtin", bnam, 0);
ret = 1;
} else if (add_autobin(bnam, modnam) && !ops['i']) {
zwarnnam(nam, "failed to add builtin %s", bnam, 0);
ret = 1;
}
} while(*args);
return ret;
}
}
/**/
static int
bin_zmodload_cond(char *nam, char **args, char *ops)
{
int ret = 0;
if (ops['u']) {
/* remove autoloaded conditions */
for (; *args; args++) {
Conddef cd = getconddef(ops['I'], *args, 0);
if (!cd) {
if (!ops['i']) {
zwarnnam(nam, "%s: no such condition", *args, 0);
ret = 1;
}
} else if (cd->flags & CONDF_ADDED) {
zwarnnam(nam, "%s: condition is already defined", *args, 0);
ret = 1;
} else
deleteconddef(cd);
}
return ret;
} else if (!*args) {
/* list autoloaded conditions */
Conddef p;
for (p = condtab; p; p = p->next) {
if (p->module) {
if (ops['L']) {
fputs("zmodload -ac", stdout);
if (p->flags & CONDF_INFIX)
putchar('I');
printf(" %s %s\n", p->module, p->name);
} else {
if (p->flags & CONDF_INFIX)
fputs("infix ", stdout);
else
fputs("post ", stdout);
printf("%s (%s)\n",p->name, p->module);
}
}
}
return 0;
} else {
/* add autoloaded conditions */
char *modnam;
modnam = *args++;
do {
char *cnam = *args ? *args++ : modnam;
if (strchr(cnam, '/')) {
zwarnnam(nam, "%s: `/' is illegal in a condition", cnam, 0);
ret = 1;
} else if (add_autocond(cnam, ops['I'], modnam) && !ops['i']) {
zwarnnam(nam, "failed to add condition `%s'", cnam, 0);
ret = 1;
}
} while(*args);
return ret;
}
}
/**/
static int
bin_zmodload_math(char *nam, char **args, char *ops)
{
int ret = 0;
if (ops['u']) {
/* remove autoloaded conditions */
for (; *args; args++) {
MathFunc f = getmathfunc(*args, 0);
if (!f) {
if (!ops['i']) {
zwarnnam(nam, "%s: no such math function", *args, 0);
ret = 1;
}
} else if (f->flags & CONDF_ADDED) {
zwarnnam(nam, "%s: math function is already defined", *args, 0);
ret = 1;
} else
deletemathfunc(f);
}
return ret;
} else if (!*args) {
/* list autoloaded math functions */
MathFunc p;
for (p = mathfuncs; p; p = p->next) {
if (p->module) {
if (ops['L']) {
fputs("zmodload -af", stdout);
printf(" %s %s\n", p->module, p->name);
} else
printf("%s (%s)\n",p->name, p->module);
}
}
return 0;
} else {
/* add autoloaded conditions */
char *modnam;
modnam = *args++;
do {
char *fnam = *args ? *args++ : modnam;
if (strchr(fnam, '/')) {
zwarnnam(nam, "%s: `/' is illegal in a math function",
fnam, 0);
ret = 1;
} else if (add_automathfunc(fnam, modnam) && !ops['i']) {
zwarnnam(nam, "failed to add math function `%s'", fnam, 0);
ret = 1;
}
} while(*args);
return ret;
}
}
static void
printautoparams(HashNode hn, int lon)
{
Param pm = (Param) hn;
if (pm->flags & PM_AUTOLOAD) {
if (lon)
printf("zmodload -ap %s %s\n", pm->u.str, pm->nam);
else
printf("%s (%s)\n", pm->nam, pm->u.str);
}
}
/**/
static int
bin_zmodload_param(char *nam, char **args, char *ops)
{
int ret = 0;
if (ops['u']) {
/* remove autoloaded parameters */
for (; *args; args++) {
Param pm = (Param) gethashnode2(paramtab, *args);
if (!pm) {
if (!ops['i']) {
zwarnnam(nam, "%s: no such parameter", *args, 0);
ret = 1;
}
} else if (!(pm->flags & PM_AUTOLOAD)) {
zwarnnam(nam, "%s: parameter is already defined", *args, 0);
ret = 1;
} else
unsetparam_pm(pm, 0, 1);
}
return ret;
} else if (!*args) {
scanhashtable(paramtab, 1, 0, 0, printautoparams, ops['L']);
return 0;
} else {
/* add autoloaded parameters */
char *modnam;
modnam = *args++;
do {
char *pnam = *args ? *args++ : modnam;
if (strchr(pnam, '/')) {
zwarnnam(nam, "%s: `/' is illegal in a parameter", pnam, 0);
ret = 1;
} else
add_autoparam(pnam, modnam);
} while(*args);
return ret;
}
}
/**/
int
unload_module(Module m, LinkNode node)
{
if ((m->flags & MOD_INIT_S) &&
!(m->flags & MOD_UNLOAD) &&
((m->flags & MOD_LINKED) ?
(m->u.linked && m->u.linked->cleanup(m)) :
(m->u.handle && cleanup_module(m))))
return 1;
else {
int del = (m->flags & MOD_UNLOAD);
if (m->wrapper) {
m->flags |= MOD_UNLOAD;
return 0;
}
m->flags &= ~MOD_UNLOAD;
if (m->flags & MOD_INIT_B) {
if (m->flags & MOD_LINKED) {
if (m->u.linked) {
m->u.linked->finish(m);
m->u.linked = NULL;
}
} else {
if (m->u.handle) {
finish_module(m);
m->u.handle = NULL;
}
}
}
if (del && m->deps) {
/* The module was unloaded delayed, unload all modules *
* on which it depended. */
LinkNode n;
for (n = firstnode(m->deps); n; incnode(n)) {
LinkNode dn = find_module((char *) getdata(n));
Module dm;
if (dn && (dm = (Module) getdata(dn)) &&
(dm->flags & MOD_UNLOAD)) {
/* See if this is the only module depending on it. */
LinkNode an;
Module am;
int du = 1;
for (an = firstnode(modules); du && an; incnode(an)) {
am = (Module) getdata(an);
if (am != m && am->deps &&
((am->flags & MOD_LINKED) ?
am->u.linked : am->u.handle)) {
LinkNode sn;
for (sn = firstnode(am->deps); du && sn;
incnode(sn)) {
if (!strcmp((char *) getdata(sn), dm->nam))
du = 0;
}
}
}
if (du)
unload_module(dm, NULL);
}
}
}
if(!m->deps) {
if (!node) {
for (node = firstnode(modules); node; incnode(node))
if (m == (Module) getdata(node))
break;
if (!node)
return 1;
}
remnode(modules, node);
zsfree(m->nam);
zfree(m, sizeof(*m));
}
}
return 0;
}
/**/
static int
bin_zmodload_load(char *nam, char **args, char *ops)
{
LinkNode node;
Module m;
int ret = 0;
if(ops['u']) {
/* unload modules */
for(; *args; args++) {
node = find_module(*args);
if (node) {
LinkNode mn, dn;
int del = 0;
for (mn = firstnode(modules); mn; incnode(mn)) {
m = (Module) getdata(mn);
if (m->deps && m->u.handle)
for (dn = firstnode(m->deps); dn; incnode(dn))
if (!strcmp((char *) getdata(dn), *args)) {
if (m->flags & MOD_UNLOAD)
del = 1;
else {
zwarnnam(nam, "module %s is in use by another module and cannot be unloaded", *args, 0);
ret = 1;
goto cont;
}
}
}
m = (Module) getdata(node);
if (del)
m->wrapper++;
if (unload_module(m, node))
ret = 1;
if (del)
m->wrapper--;
} else if (!ops['i']) {
zwarnnam(nam, "no such module %s", *args, 0);
ret = 1;
}
cont: ;
}
return ret;
} else if(!*args) {
/* list modules */
for (node = firstnode(modules); node; incnode(node)) {
m = (Module) getdata(node);
if (m->u.handle && !(m->flags & MOD_UNLOAD)) {
if(ops['L']) {
printf("zmodload ");
if(m->nam[0] == '-')
fputs("-- ", stdout);
quotedzputs(m->nam, stdout);
} else
nicezputs(m->nam, stdout);
putchar('\n');
}
}
return 0;
} else {
/* load modules */
for (; *args; args++)
if (!require_module(nam, *args, 1, (!ops['i'])))
ret = 1;
return ret;
}
}
/* The list of module-defined conditions. */
/**/
mod_export Conddef condtab;
/* This gets a condition definition with the given name. The first *
* argument says if we have to look for an infix condition. The last *
* argument is non-zero if we should autoload modules if needed. */
/**/
Conddef
getconddef(int inf, char *name, int autol)
{
Conddef p;
int f = 1;
do {
for (p = condtab; p; p = p->next) {
if ((!!inf == !!(p->flags & CONDF_INFIX)) &&
!strcmp(name, p->name))
break;
}
if (autol && p && p->module) {
/* This is a definition for an autoloaded condition, load the *
* module if we haven't tried that already. */
if (f) {
load_module(p->module);
f = 0;
p = NULL;
} else {
deleteconddef(p);
return NULL;
}
} else
break;
} while (!p);
return p;
}
/* This adds the given condition definition. The return value is zero on *
* success and 1 on failure. If there is a matching definition for an *
* autoloaded condition, it is removed. */
/**/
int
addconddef(Conddef c)
{
Conddef p = getconddef((c->flags & CONDF_INFIX), c->name, 0);
if (p) {
if (!p->module || (p->flags & CONDF_ADDED))
return 1;
/* There is an autoload definition. */
deleteconddef(p);
}
c->next = condtab;
condtab = c;
return 0;
}
/* This adds multiple condition definitions. This is like addbuiltins(). */
/**/
mod_export int
addconddefs(char const *nam, Conddef c, int size)
{
int hads = 0, hadf = 0;
while (size--) {
if (c->flags & CONDF_ADDED) {
c++;
continue;
}
if (addconddef(c)) {
zwarnnam(nam, "name clash when adding condition `%s'", c->name, 0);
hadf = 1;
} else {
c->flags |= CONDF_ADDED;
hads = 2;
}
c++;
}
return hadf ? hads : 1;
}
/* This list of hook functions defined. */
/**/
Hookdef hooktab;
/* Find a hook definition given the name. */
/**/
Hookdef
gethookdef(char *n)
{
Hookdef p;
for (p = hooktab; p; p = p->next)
if (!strcmp(n, p->name))
return p;
return NULL;
}
/* This adds the given hook definition. The return value is zero on *
* success and 1 on failure. */
/**/
int
addhookdef(Hookdef h)
{
if (gethookdef(h->name))
return 1;
h->next = hooktab;
hooktab = h;
h->funcs = znewlinklist();
return 0;
}
/* This adds multiple hook definitions. This is like addbuiltins(). */
/**/
mod_export int
addhookdefs(char const *nam, Hookdef h, int size)
{
int hads = 0, hadf = 0;
while (size--) {
if (addhookdef(h)) {
zwarnnam(nam, "name clash when adding hook `%s'", h->name, 0);
hadf = 1;
} else
hads = 2;
h++;
}
return hadf ? hads : 1;
}
/* Delete hook definitions. */
/**/
int
deletehookdef(Hookdef h)
{
Hookdef p, q;
for (p = hooktab, q = NULL; p && p != h; q = p, p = p->next);
if (!p)
return 1;
if (q)
q->next = p->next;
else
hooktab = p->next;
freelinklist(p->funcs, NULL);
return 0;
}
/**/
mod_export int
deletehookdefs(char const *nam, Hookdef h, int size)
{
while (size--) {
deletehookdef(h);
h++;
}
return 1;
}
/* Add a function to a hook. */
/**/
int
addhookdeffunc(Hookdef h, Hookfn f)
{
zaddlinknode(h->funcs, (void *) f);
return 0;
}
/**/
mod_export int
addhookfunc(char *n, Hookfn f)
{
Hookdef h = gethookdef(n);
if (h)
return addhookdeffunc(h, f);
return 1;
}
/* Delete a function from a hook. */
/**/
int
deletehookdeffunc(Hookdef h, Hookfn f)
{
LinkNode p;
for (p = firstnode(h->funcs); p; incnode(p))
if (f == (Hookfn) getdata(p)) {
remnode(h->funcs, p);
return 0;
}
return 1;
}
/**/
mod_export int
deletehookfunc(char *n, Hookfn f)
{
Hookdef h = gethookdef(n);
if (h)
return deletehookdeffunc(h, f);
return 1;
}
/* Run the function(s) for a hook. */
/**/
mod_export int
runhookdef(Hookdef h, void *d)
{
if (empty(h->funcs)) {
if (h->def)
return h->def(h, d);
return 0;
} else if (h->flags & HOOKF_ALL) {
LinkNode p;
int r;
for (p = firstnode(h->funcs); p; incnode(p))
if ((r = ((Hookfn) getdata(p))(h, d)))
return r;
if (h->def)
return h->def(h, d);
return 0;
} else
return ((Hookfn) getdata(lastnode(h->funcs)))(h, d);
}
/**/
int
runhook(char *n, void *d)
{
Hookdef h = gethookdef(n);
if (h)
return runhookdef(h, d);
return 0;
}
/* This adds the given parameter definition. The return value is zero on *
* success and 1 on failure. */
/**/
int
addparamdef(Paramdef d)
{
Param pm;
if ((pm = (Param) gethashnode2(paramtab, d->name)))
unsetparam_pm(pm, 0, 1);
if (!(pm = createparam(d->name, d->flags)) &&
!(pm = (Param) paramtab->getnode(paramtab, d->name)))
return 1;
pm->level = 0;
pm->u.data = d->var;
pm->sets.ifn = (void (*)(Param, zlong)) d->set;
pm->gets.ifn = (zlong (*)(Param)) d->get;
pm->unsetfn = (void (*)(Param, int)) d->unset;
return 0;
}
/* This adds multiple parameter definitions. This is like addbuiltins(). */
/**/
mod_export int
addparamdefs(char const *nam, Paramdef d, int size)
{
int hads = 0, hadf = 0;
while (size--) {
if (addparamdef(d)) {
zwarnnam(nam, "error when adding parameter `%s'", d->name, 0);
hadf = 1;
} else
hads = 2;
d++;
}
return hadf ? hads : 1;
}
/* Delete parameters defined. No error checking yet. */
/**/
int
deleteparamdef(Paramdef d)
{
unsetparam(d->name);
return 0;
}
/**/
mod_export int
deleteparamdefs(char const *nam, Paramdef d, int size)
{
while (size--) {
deleteparamdef(d);
d++;
}
return 1;
}
/* This adds a definition for autoloading a module for a condition. */
/**/
int
add_autocond(char *nam, int inf, char *module)
{
Conddef c = (Conddef) zalloc(sizeof(*c));
c->name = ztrdup(nam);
c->flags = (inf ? CONDF_INFIX : 0);
c->module = ztrdup(module);
if (addconddef(c)) {
zsfree(c->name);
zsfree(c->module);
zfree(c, sizeof(*c));
return 1;
}
return 0;
}
/* This removes the given condition definition from the list(s). If this *
* is a definition for a autoloaded condition, the memory is freed. */
/**/
int
deleteconddef(Conddef c)
{
Conddef p, q;
for (p = condtab, q = NULL; p && p != c; q = p, p = p->next);
if (p) {
if (q)
q->next = p->next;
else
condtab = p->next;
if (p->module) {
/* autoloaded, free it */
zsfree(p->name);
zsfree(p->module);
zfree(p, sizeof(*p));
}
return 0;
}
return -1;
}
/* This removes multiple condition definitions (like deletebuiltins()). */
/**/
mod_export int
deleteconddefs(char const *nam, Conddef c, int size)
{
int hads = 0, hadf = 0;
while (size--) {
if (!(c->flags & CONDF_ADDED)) {
c++;
continue;
}
if (deleteconddef(c)) {
zwarnnam(nam, "condition `%s' already deleted", c->name, 0);
hadf = 1;
} else
hads = 2;
c->flags &= ~CONDF_ADDED;
c++;
}
return hadf ? hads : 1;
}
/* This adds a definition for autoloading a module for a parameter. */
/**/
void
add_autoparam(char *nam, char *module)
{
Param pm;
if ((pm = (Param) gethashnode2(paramtab, nam)))
unsetparam_pm(pm, 0, 1);
pm = setsparam(ztrdup(nam), ztrdup(module));
pm->flags |= PM_AUTOLOAD;
}
/* List of math functions. */
/**/
MathFunc mathfuncs;
/**/
MathFunc
getmathfunc(char *name, int autol)
{
MathFunc p, q = NULL;
for (p = mathfuncs; p; q = p, p = p->next)
if (!strcmp(name, p->name)) {
if (autol && p->module) {
char *n = dupstring(p->module);
if (q)
q->next = p->next;
else
mathfuncs = p->next;
zsfree(p->module);
zfree(p, sizeof(*p));
load_module(n);
return getmathfunc(name, 0);
}
return p;
}
return NULL;
}
/**/
mod_export int
addmathfunc(MathFunc f)
{
MathFunc p;
if (f->flags & MFF_ADDED)
return 1;
for (p = mathfuncs; p; p = p->next)
if (!strcmp(f->name, p->name))
return 1;
f->flags |= MFF_ADDED;
f->next = mathfuncs;
mathfuncs = f;
return 0;
}
/**/
mod_export int
addmathfuncs(char const *nam, MathFunc f, int size)
{
int hads = 0, hadf = 0;
while (size--) {
if (f->flags & MFF_ADDED) {
f++;
continue;
}
if (addmathfunc(f)) {
zwarnnam(nam, "name clash when adding math function `%s'",
f->name, 0);
hadf = 1;
} else
hads = 2;
f++;
}
return hadf ? hads : 1;
}
/**/
int
add_automathfunc(char *nam, char *module)
{
MathFunc f = (MathFunc) zalloc(sizeof(*f));
f->name = ztrdup(nam);
f->module = ztrdup(module);
f->flags = 0;
if (addmathfunc(f)) {
zsfree(f->name);
zsfree(f->module);
zfree(f, sizeof(*f));
return 1;
}
return 0;
}
/**/
mod_export int
deletemathfunc(MathFunc f)
{
MathFunc p, q;
for (p = mathfuncs, q = NULL; p && p != f; q = p, p = p->next);
if (p) {
if (q)
q->next = f->next;
else
mathfuncs = f->next;
if (f->module) {
zsfree(f->name);
zsfree(f->module);
zfree(f, sizeof(*f));
} else
f->flags &= ~MFF_ADDED;
return 0;
}
return -1;
}
/**/
mod_export int
deletemathfuncs(char const *nam, MathFunc f, int size)
{
int hads = 0, hadf = 0;
while (size--) {
if (!(f->flags & MFF_ADDED)) {
f++;
continue;
}
if (deletemathfunc(f)) {
zwarnnam(nam, "math function `%s' already deleted",
f->name, 0);
hadf = 1;
} else
hads = 2;
f++;
}
return hadf ? hads : 1;
}
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