gambas-source-code/main/gbx/gbx_archive.c
gambas a62007de37 Class overriding is not retroactive anymore when the class already has instances.
[INTERPRETER]
* BUG: Class overriding is not retroactive anymore when the class already has instances.
* NEW: In tracing mode, indent the interpreter output according to the current stack depth.
2021-09-18 01:09:05 +02:00

798 lines
16 KiB
C

/***************************************************************************
gbx_archive.c
(c) 2000-2017 Benoît Minisini <g4mba5@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
***************************************************************************/
#define __GBX_ARCHIVE_C
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include "gb_common.h"
#include "gb_error.h"
#include "gb_alloc.h"
#include "gbx_string.h"
#include "gbx_stream.h"
#include "gbx_component.h"
#include "gbx_regexp.h"
#include "gbx_exec.h"
#include "gbx_class.h"
#include "gbx_project.h"
#include "gbx_archive.h"
#include "gb_arch_temp.h"
//#define DEBUG_COMP 1
// main archive project (used only if gbx is run with -x flag)
ARCHIVE *ARCHIVE_main = NULL;
// Additional library search directory used in debug mode, normally '~/.config/share/gambas3/lib'
char *ARCHIVE_path = NULL;
static char *_local_path = NULL;
static ARCHIVE *_archive_list = NULL;
static char *arch_pattern = NULL;
static int arch_index = 0;
static ARCH *arch_dir = NULL;
static char *arch_prefix = NULL;
ARCHIVE *ARCHIVE_create(const char *name, const char *path)
{
ARCHIVE *arch;
ALLOC_ZERO(&arch, sizeof(ARCHIVE));
arch->name = name;
arch->path = STRING_new_zero(path);
arch->domain = STRING_new_zero(name ? name : "gb");
arch->translation_loaded = FALSE;
TABLE_create(&arch->classes, sizeof(CLASS_SYMBOL), TF_IGNORE_CASE);
LIST_insert(&_archive_list, arch, &arch->list);
return arch;
}
static void error_ARCHIVE_load_exported_class(COMPONENT *current)
{
COMPONENT_current = current;
}
void ARCHIVE_load_exported_class(ARCHIVE *arch, int pass)
{
char *buffer;
int len;
char *name;
char *file_name;
CLASS *class;
int i;
COMPONENT *current;
bool optional;
char c;
if (arch->exported_classes_loaded)
return;
current = COMPONENT_current;
COMPONENT_current = (COMPONENT *)arch->current_component;
ON_ERROR_1(error_ARCHIVE_load_exported_class, current)
{
/* COMPONENT_current is set => it will look in the archive */
#if DEBUG_COMP
fprintf(stderr, "load_exported_class: %s (component: %s)\n", arch->name, COMPONENT_current ? COMPONENT_current->name : "?");
#endif
if (FILE_exist(".list"))
{
if (pass & AR_FIND_ONLY)
{
#if DEBUG_COMP
fprintf(stderr, "<Find pass>\n");
#endif
STREAM_load(".list", &buffer, &len);
/* The file must end with a newline !*/
buffer[len - 1] = 0;
#if DEBUG_COMP
fprintf(stderr, "-----------\n%s\n----------\n\n", buffer);
#endif
ARRAY_create(&arch->exported);
name = strtok(buffer, "\n");
while (name)
{
#if DEBUG_COMP
fprintf(stderr, "Check %s global\n", name);
#endif
file_name = strchr(name, ' ');
if (file_name)
*file_name++ = 0;
len = strlen(name);
optional = FALSE;
for(;;)
{
c = name[len - 1];
if (c == '?')
{
optional = TRUE;
len--;
}
else if (c == '!')
len--;
else
break;
}
name[len] = 0;
if (!optional || CLASS_look_global(name, len) == NULL)
{
class = CLASS_find_export(file_name, name);
if (file_name)
{
ALLOC(&class->data, len + 1);
strcpy(class->data, file_name);
class->data[len] = 0;
}
class = CLASS_check_global(class);
#if DEBUG_COMP
fprintf(stderr, "Add to load: %p %s\n", class, name);
#endif
class->component = COMPONENT_current;
*((CLASS **)ARRAY_add(&arch->exported)) = class;
}
name = strtok(NULL, "\n");
}
FREE(&buffer);
}
if (pass & AR_FIND_ONLY) // That way the 'pass' flag is always ignored.
{
#if DEBUG_COMP
fprintf(stderr, "<Load pass>\n");
#endif
for (i = 0; i < ARRAY_count(arch->exported); i++)
{
#if DEBUG_COMP
fprintf(stderr, "load %p %s\n", arch->exported[i], arch->exported[i]->name);
#endif
CLASS_load(arch->exported[i]);
}
ARRAY_delete(&arch->exported);
arch->exported_classes_loaded = TRUE;
}
}
}
END_ERROR
COMPONENT_current = current;
}
// Archive path is an absolute path or :<vendor>/<library>:<version>
static char *exist_library(const char *dir, const char *name)
{
char *path;
char *n;
char *p;
n = STRING_new_zero(name);
path = (char *)FILE_cat(dir, n, NULL);
if (FILE_exist(path))
goto __RETURN_PATH;
n = STRING_add(n, ".gambas", -1);
path = (char *)FILE_cat(dir, n, NULL);
if (FILE_exist(path))
goto __RETURN_PATH;
p = rindex(n, ':');
if (p)
{
strcpy(p, ".gambas");
path = (char *)FILE_cat(dir, n, NULL);
if (FILE_exist(path))
goto __RETURN_PATH;
}
path = NULL;
__RETURN_PATH:
STRING_free(&n);
return path;
}
void ARCHIVE_load(ARCHIVE *arch, bool load_exp)
{
char *path;
char *dir;
const char *name;
char *env;
if (arch->path)
{
if (*arch->path == '/' && FILE_exist(arch->path))
{
path = (char *)arch->path;
}
else
{
if (*arch->path == ':')
{
if (!_local_path)
{
env = getenv("XDG_DATA_HOME");
if (env && *env)
_local_path = STRING_new_zero(FILE_cat(env, "gambas3/lib", NULL));
else
_local_path = STRING_new_zero(FILE_cat(FILE_get_home(), ".local/share/gambas3/lib", NULL));
}
name = &arch->path[1];
}
else
name = FILE_get_name(arch->path);
// For backward-compatibility, library name is searched in the current folder too, without the vendor.
if (!(path = exist_library(PROJECT_path, FILE_get_name(name))))
{
if (!_local_path || !(path = exist_library(_local_path, name)))
{
if (!ARCHIVE_path || !(path = exist_library(ARCHIVE_path, name)))
{
if (!(path = exist_library(COMPONENT_path, name)))
{
dir = STRING_new_zero(FILE_cat(PROJECT_exec_path, "bin", NULL));
path = exist_library(dir, name);
STRING_free(&dir);
}
}
}
}
if (!path || !FILE_exist(path))
THROW(E_LIBRARY, arch->name, "cannot find library");
}
}
else
{
path = FILE_buffer();
sprintf(path, ARCH_PATTERN, COMPONENT_path, arch->name);
}
arch->arch = ARCH_open(path);
arch->current_component = COMPONENT_current;
if (load_exp)
ARCHIVE_load_exported_class(arch, AR_FIND_AND_LOAD); //, dep);
}
void ARCHIVE_create_main(const char *path)
{
ARCHIVE_main = ARCHIVE_create(NULL, NULL);
if (path)
ARCHIVE_main->arch = ARCH_open(path);
else
ARCHIVE_main->arch = NULL;
}
void ARCHIVE_load_main()
{
ARCHIVE_load_exported_class(ARCHIVE_main, AR_FIND_AND_LOAD);
}
void ARCHIVE_delete(ARCHIVE *arch)
{
int i;
LIST_remove(&_archive_list, arch, &arch->list);
if (arch->arch)
ARCH_close(arch->arch);
for (i = 0; i < TABLE_count(arch->classes); i++)
IFREE(TABLE_get_symbol(arch->classes, i)->name);
TABLE_delete(&arch->classes);
STRING_free(&arch->domain);
STRING_free(&arch->version);
STRING_free(&arch->path);
FREE(&arch);
}
void ARCHIVE_init(void)
{
}
void ARCHIVE_exit(void)
{
if (ARCHIVE_main)
ARCHIVE_delete(ARCHIVE_main);
STRING_free(&arch_pattern);
STRING_free(&arch_prefix);
STRING_free(&ARCHIVE_path);
STRING_free(&_local_path);
}
/* ### *parch must be initialized to NULL or a valid archive */
/* Returns a true archive, never the main archive if we are not running an executable */
bool ARCHIVE_find_from_path(ARCHIVE **parch, const char **ppath)
{
int i;
CLASS *class;
const char *path = *ppath;
const char *p;
if (*parch)
return FALSE;
if (COMPONENT_current && COMPONENT_current->archive)
*parch = COMPONENT_current->archive;
else if (CP && CP->component && CP->component->archive)
*parch = CP->component->archive;
else
*parch = NULL;
//fprintf(stderr, "ARCHIVE_find_from_path: %s (%s)\n", *ppath, *parch ? (*parch)->name : "NULL");
if (strncmp(path, "./", 2) == 0 && path[2])
{
path += 2;
p = index(path, '/');
if (p)
{
int len = p - path;
char name[len + 1];
COMPONENT *comp;
strncpy(name, path, len);
name[len] = 0;
comp = COMPONENT_find(name);
if (comp && comp->archive)
{
*parch = comp->archive;
*ppath = p + 1;
return FALSE;
}
}
}
if (strncmp(path, ".../", 4) == 0)
{
path += 4;
*parch = NULL;
}
else
{
i = 0;
while (strncmp(path, "../", 3) == 0)
{
path += 3;
if (*parch == NULL || *parch == ARCHIVE_main)
continue;
while (i < STACK_frame_count)
{
class = STACK_frame[i].cp;
//fprintf(stderr, "[%d] %s / %s\n", i, class ? class->name : "NULL", class && class->component && class->component->archive ? class->component->archive->name : "NULL");
if (class)
{
if (!class->component)
{
*parch = NULL;
break;
}
if (class->component && class->component->archive != *parch)
{
*parch = class->component->archive;
break;
}
}
i++;
}
if (i == STACK_frame_count)
*parch = NULL;
}
}
if (*parch == NULL && EXEC_arch)
*parch = ARCHIVE_main;
//fprintf(stderr, "--> '%s' / %s\n", *parch ? (*parch)->name : "(null)", *ppath);
*ppath = path;
return *parch == NULL;
}
/* Can return the main archive even if we are not running an executable */
bool ARCHIVE_get_current(ARCHIVE **parch)
{
if (COMPONENT_current && COMPONENT_current->archive)
*parch = COMPONENT_current->archive;
else if (CP && CP->component && CP->component->archive)
*parch = CP->component->archive;
else
*parch = ARCHIVE_main;
return *parch == NULL;
}
bool ARCHIVE_get(ARCHIVE *arch, const char **ppath, ARCHIVE_FIND *find)
{
ARCH_FIND f;
struct stat buf;
if (!*ppath || **ppath == 0)
return TRUE;
if (ARCHIVE_find_from_path(&arch, ppath))
{
// no archive found, we try a lstat
if (!PROJECT_path)
return TRUE;
FILE_chdir(PROJECT_path);
if (stat(*ppath, &buf))
return TRUE;
find->pos = S_ISDIR(buf.st_mode) ? -1 : 0;
find->sym = NULL;
find->len = (int)buf.st_size;
find->index = -1;
find->arch = NULL;
return FALSE;
}
if (!arch->arch) // archive has been created but loading has failed
return TRUE;
if (ARCH_find(arch->arch, *ppath, 0, &f))
return TRUE;
find->sym = f.sym;
find->pos = f.pos;
find->len = f.len;
find->index = f.index;
find->arch = arch;
return FALSE;
}
bool ARCHIVE_exist(ARCHIVE *arch, const char *path)
{
ARCHIVE_FIND find;
//if (get_current(&arch, &path))
// return FALSE;
return (!ARCHIVE_get(arch, &path, &find));
}
bool ARCHIVE_is_dir(ARCHIVE *arch, const char *path)
{
ARCHIVE_FIND find;
if (ARCHIVE_get(arch, &path, &find))
return FALSE;
return (find.pos < 0);
}
void ARCHIVE_stat(ARCHIVE *arch, const char *path, FILE_STAT *info)
{
ARCHIVE_FIND find = { 0 };
struct stat buf;
//if (get_current(&arch))
// THROW_SYSTEM(ENOENT, path);
if (ARCHIVE_get(arch, &path, &find))
THROW_SYSTEM(ENOENT, path);
if (find.arch)
fstat(find.arch->arch->fd, &buf);
else
stat(PROJECT_path, &buf);
info->type = find.pos < 0 ? GB_STAT_DIRECTORY : GB_STAT_FILE;
info->mode = 0400;
info->size = find.len;
info->atime = (int)buf.st_mtime;
info->mtime = (int)buf.st_mtime;
info->ctime = (int)buf.st_mtime;
info->hidden = (*FILE_get_name(path) == '.');
info->uid = (int)buf.st_uid;
info->gid = (int)buf.st_gid;
}
void ARCHIVE_read(ARCHIVE *arch, int pos, void *buffer, int len)
{
ARCH_read(arch->arch, pos, buffer, len);
}
void ARCHIVE_dir_first(ARCHIVE *arch, const char *path, const char *pattern, int attr)
{
ARCHIVE_FIND find;
char abs_path[16];
int abs_len;
/*if (get_current(&arch, &path))
{
arch_dir = NULL;
return;
}*/
if (ARCHIVE_get(arch, &path, &find))
{
arch_dir = NULL;
return;
}
// ?? "." means that we want to browse the archive.
if (!find.sym && !find.arch) // && !(path[0] == '.' && path[1] == 0))
{
// By calling FILE_dir_first() again with an absolute path, we are sure that next calls to
// FILE_dir_next() will never call ARCHIVE_dir_next().
FILE_dir_first(FILE_cat(PROJECT_path, path, NULL), pattern, attr);
return;
}
if (pattern == NULL || !*pattern)
pattern = "*";
arch = find.arch;
arch_dir = arch->arch;
arch_index = 0;
STRING_free(&arch_pattern);
arch_pattern = STRING_new_zero(pattern);
//if (arch_dir->header.version == 2)
//{
if (find.index >= 0)
abs_len = sprintf(abs_path, "/%d:", find.index);
else
abs_len = 0;
/*}
else
{
ARCH_get_absolute_path(path, strlen(path), abs_path, &abs_len);
if (abs_len && abs_path[abs_len - 1] != '/')
{
abs_path[abs_len] = '/';
abs_len++;
}
}*/
STRING_free(&arch_prefix);
if (abs_len)
arch_prefix = STRING_new(abs_path, abs_len);
}
bool ARCHIVE_dir_next(char **name, int *len, int attr)
{
ARCH_SYMBOL *asym;
SYMBOL *sym;
char *s = NULL;
int l = 0;
int lenp;
/*if (arch_fd < 0)
return FILE_dir_next(name, len);*/
if (!arch_dir)
return TRUE;
lenp = STRING_length(arch_prefix);
for(;;)
{
if (arch_index >= arch_dir->header.n_symbol)
return TRUE;
//sym = &arch_dir->symbol[arch_index].sym;
asym = &arch_dir->symbol[arch_dir->sort[arch_index]];
sym = &asym->sym;
if (arch_pattern == NULL)
break;
arch_index++;
if (attr == GB_STAT_DIRECTORY && (asym->pos >= 0))
continue;
if (sym->len < lenp)
continue;
if (lenp)
{
if (strncmp(sym->name, arch_prefix, lenp))
continue;
}
else // special case: root directory when header.version == 2
{
if (!strncmp(sym->name, "/", 1))
continue;
}
s = sym->name + lenp;
l = sym->len - lenp;
if (l < 0)
continue;
if (memchr(s, '/', l))
continue;
if (!REGEXP_match(arch_pattern, STRING_length(arch_pattern), s, l))
continue;
break;
}
*name = s;
*len = l;
return FALSE;
}
bool ARCHIVE_check_addr(char *addr)
{
ARCHIVE *arch;
ARCH *a;
LIST_for_each(arch, _archive_list)
{
a = arch->arch;
if (a && addr >= a->addr && addr < &a->addr[a->length])
return FALSE;
}
return TRUE;
}
void ARCHIVE_browse(ARCHIVE *arch, void (*found)(const char *path, int64_t size))
{
int i;
ARCH_SYMBOL *asym;
SYMBOL *sym;
ARCH *a = arch->arch;
char *path;
char *temp;
int size;
int ip;
for (i = 0; i < a->header.n_symbol; i++)
{
asym = &a->symbol[i];
sym = &asym->sym;
size = asym->len;
path = STRING_new(sym->name, sym->len);
for(;;)
{
if (*path != '/')
break;
ip = atoi(&path[1]);
sym = &a->symbol[ip].sym;
temp = path;
path = STRING_new(sym->name, sym->len);
if (path[sym->len - 1] != '/')
path = STRING_add(path, "/", 1);
path = STRING_add(path, strchr(temp, ':') + 1, 0);
STRING_free(&temp);
}
(*found)(path, size);
STRING_free(&path);
}
}
char *ARCHIVE_get_version(ARCHIVE *arch)
{
COMPONENT *current;
char *buffer;
int len;
int n;
char *line;
if (!arch->version_loaded)
{
current = COMPONENT_current;
COMPONENT_current = (COMPONENT *)arch->current_component;
ON_ERROR_1(error_ARCHIVE_load_exported_class, current)
{
STREAM_load(".startup", &buffer, &len);
n = 0;
line = strtok(buffer, "\n");
while (line)
{
n++;
if (n == 5)
{
arch->version = STRING_new_zero(line);
break;
}
line = strtok(NULL, "\n");
}
FREE(&buffer);
}
END_ERROR
COMPONENT_current = current;
arch->version_loaded = TRUE;
}
return arch->version;
}