/*
scconfig - detection of types and type sizes
Copyright (C) 2012 Tibor Palinkas
Copyright (C) 2017-2018 Aron Barath
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Project page: http://repo.hu/projects/scconfig
Contact via email: scconfig [at] igor2.repo.hu
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "libs.h"
#include "log.h"
#include "db.h"
#include "dep.h"
/* assume there is no integer that is at least this wide, in bytes */
#define MAX_INT_WIDTH 9
/* ('long double' can be 16 bytes; see https://en.wikipedia.org/wiki/Long_double) */
#define MAX_FLT_WIDTH 17
static int try_size(int logdepth, char *cflags, char *ldflags, const char *type, int use_stdint, const char *path, const char **sizearr, unsigned char *inc_stdint, const int max_width)
{
char *out = NULL;
const char *test_c_template =
NL "#include <stdio.h>"
NL "int main() {"
NL " printf(\"OK %%d\\n\", sizeof(%s));"
NL " return 0;"
NL "}"
NL;
char test_c[512], *start;
const char *inc = "#include <stdint.h>\n";
int size;
if (use_stdint) {
strcpy(test_c, inc);
start = test_c + strlen(inc);
}
else
start = test_c;
sprintf(start, test_c_template, type);
report("Testing size of type %25s... ", type);
logprintf(logdepth, "trying size with ldflags '%s'\n", ldflags == NULL ? get("cc/ldflags") : ldflags);
if (compile_run(logdepth+1, test_c, NULL, cflags, ldflags, &out) == 0) {
if (target_emu_fail(out)) {
report(" FAIL (emulator)\n");
free(out);
return -1;
}
if (strncmp(out, "OK", 2) == 0) {
size = atoi(out+3);
if ((size > 0) && (size < max_width)) {
sprintf(test_c, "%d", size);
put(path, test_c);
sizearr[size] = type;
if (inc_stdint != NULL)
inc_stdint[size] = use_stdint;
report(" OK, size %d byte%s\n", size, (size > 1) ? "s" : "");
}
else {
report(" FAIL, size %d bytes\n", size);
size = -1;
}
free(out);
return size;
}
free(out);
}
report(" FAIL (compile)\n");
return -1;
}
int find_types_stdint(const char *name, int logdepth, int fatal)
{
char *test_c =
NL "#include <stdint.h>"
NL "int main() {"
NL " if (sizeof(uint8_t) == 1)"
NL " puts(\"OK\");"
NL " return 0;"
NL "}"
NL;
require("cc/cc", logdepth, fatal);
report("Checking for stdint.h... ");
logprintf(logdepth, "find_types_stdint: trying to find stdint.h...\n");
logdepth++;
if (try_icl(logdepth, "libs/types/stdint", test_c, NULL, NULL, NULL))
return 0;
return try_fail(logdepth, "libs/types/stdint");
}
int find_types_sizes(const char *name, int logdepth, int fatal)
{
const char *stdint;
const char *sizearr_u[MAX_INT_WIDTH];
const char *sizearr_s[MAX_INT_WIDTH];
const char *sizearr_f[MAX_FLT_WIDTH];
unsigned char inc_stdint_u[MAX_INT_WIDTH];
unsigned char inc_stdint_s[MAX_INT_WIDTH];
int n;
const char *includes = "";
const char *path_template = "sys/types/size/%d_%c_int";
const char *path_template_f = "sys/types/size/%d_float";
char path[64];
require("cc/cc", logdepth, fatal);
require("libs/types/stdint/presents", logdepth, 0);
stdint = get("libs/types/stdint/presents");
for(n = 0; n < MAX_INT_WIDTH; n++) {
sizearr_u[n] = NULL;
sizearr_s[n] = NULL;
inc_stdint_u[n] = 0;
inc_stdint_s[n] = 0;
}
for(n = 0; n < MAX_FLT_WIDTH; n++)
sizearr_f[n] = NULL;
try_size(logdepth+1, NULL, NULL, "unsigned long long int", 0, "sys/types/size/unsigned_long_long_int", sizearr_u, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "unsigned char", 0, "sys/types/size/unsigned_char", sizearr_u, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "unsigned short int", 0, "sys/types/size/unsigned_short_int", sizearr_u, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "unsigned int", 0, "sys/types/size/unsigned_int", sizearr_u, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "unsigned long int", 0, "sys/types/size/unsigned_long_int", sizearr_u, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "signed long long int", 0, "sys/types/size/signed_long_long_int", sizearr_s, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "signed char", 0, "sys/types/size/signed_char", sizearr_s, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "signed short int", 0, "sys/types/size/signed_short_int", sizearr_s, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "signed int", 0, "sys/types/size/signed_int", sizearr_s, NULL, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "signed long int", 0, "sys/types/size/signed_long_int", sizearr_s, NULL, MAX_INT_WIDTH);
if ((stdint != NULL) && (istrue(stdint))) {
try_size(logdepth+1, NULL, NULL, "uint8_t", 1, "sys/types/size/uint8_t", sizearr_u, inc_stdint_u, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "uint16_t", 1, "sys/types/size/uint16_t", sizearr_u, inc_stdint_u, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "uint32_t", 1, "sys/types/size/uint32_t", sizearr_u, inc_stdint_u, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "uint64_t", 1, "sys/types/size/uint64_t", sizearr_u, inc_stdint_u, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "int8_t", 1, "sys/types/size/int8_t", sizearr_s, inc_stdint_s, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "int16_t", 1, "sys/types/size/int16_t", sizearr_s, inc_stdint_s, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "int32_t", 1, "sys/types/size/int32_t", sizearr_s, inc_stdint_s, MAX_INT_WIDTH);
try_size(logdepth+1, NULL, NULL, "int64_t", 1, "sys/types/size/int64_t", sizearr_s, inc_stdint_s, MAX_INT_WIDTH);
}
try_size(logdepth+1, NULL, NULL, "float", 0, "sys/types/size/float", sizearr_f, NULL, MAX_FLT_WIDTH);
try_size(logdepth+1, NULL, NULL, "double", 0, "sys/types/size/double", sizearr_f, NULL, MAX_FLT_WIDTH);
try_size(logdepth+1, NULL, NULL, "long double", 0, "sys/types/size/long_double", sizearr_f, NULL, MAX_FLT_WIDTH);
for(n = 0; n < MAX_INT_WIDTH; n++) {
if (sizearr_u[n] != NULL) {
report("Found best fit %d bytes wide uint: %s\n", n, sizearr_u[n]);
sprintf(path, path_template, n, 'u');
put(path, sizearr_u[n]);
if (inc_stdint_u[n])
includes = "#include <stdint.h>";
}
if (sizearr_s[n] != NULL) {
report("Found best fit %d bytes wide sint: %s\n", n, sizearr_s[n]);
sprintf(path, path_template, n, 's');
put(path, sizearr_s[n]);
if (inc_stdint_s[n])
includes = "#include <stdint.h>";
}
}
for(n = 0; n < MAX_FLT_WIDTH; n++) {
if (sizearr_f[n] != NULL) {
report("Found best fit %d bytes wide float: %s\n", n, sizearr_f[n]);
sprintf(path, path_template_f, n);
put(path, sizearr_f[n]);
}
}
put("sys/types/size/presents", strue); /* to avoid redetection */
put("sys/types/size/includes", includes);
return 0;
}
int find_types_something_t(const char *name, int logdepth, int fatal, const char *prefix, const char *typ, const char *define, const char *try_include)
{
char *out = NULL;
int res;
char test_c[512];
char node[256], *nodeend;
const char **include, *includes[] = {"", "#include <stddef.h>", "#include <sys/types.h>", "#include <sys/types/types.h>", "#include <stdlib.h>", "#include <unistd.h>", "#include <stdio.h>", NULL};
const char ** const first_include = (try_include && *try_include) ? includes : (includes+1);
char *test_c_include =
NL "%s"
NL "int my_puts(const char *s);"
NL "%s"
NL "int main() {"
NL " %s s;"
NL " my_puts(\"OK\");"
NL " return 0;"
NL "}"
NL "#include <stdio.h>"
NL "int my_puts(const char *s)"
NL "{"
NL " return puts(s);"
NL "}"
NL;
char *test_c_size =
NL "%s"
NL "#include <stdio.h>"
NL "%s"
NL "int main() {"
NL " printf(\"%%d\", sizeof(%s));"
NL " return 0;"
NL "}"
NL;
char *test_c_broken =
NL "%s"
NL "int my_puts(const char *s);"
NL "%s"
NL "int main() {"
NL " %s s;"
NL " void *v;"
NL " if (sizeof(v) != sizeof(s)) my_puts(\"yes\");"
NL " else my_puts(\"no\");"
NL " return 0;"
NL "}"
NL "#include <stdio.h>"
NL "int my_puts(const char *s)"
NL "{"
NL " return puts(s);"
NL "}"
NL;
includes[0] = try_include;
require("cc/cc", logdepth, fatal);
report("Checking for type %s... ", typ);
logprintf(logdepth, "find_types_something_t: Checking for %s...\n", typ);
logdepth++;
sprintf(node, "%s/%s", prefix, typ);
nodeend = node + strlen(node);
/* replace '*' at the end of the node path with _ptr so it can be saved in the tree */
if (nodeend[-1] == '*') {
nodeend--;
while((nodeend > node) && (*nodeend == ' ')) nodeend--;
strcpy(nodeend-1, "_ptr");
nodeend+=4;
}
nodeend[0] = '/';
nodeend[1] = '\0';
nodeend++;
if (define == NULL)
define = "";
for(include = first_include; *include != NULL; include++) {
sprintf(test_c, test_c_include, define, *include, typ);
if ((compile_run(logdepth, test_c, NULL, NULL, NULL, &out) == 0) && (strncmp(out, "OK", 2) == 0)) {
report("Found; ");
logprintf(logdepth+1, "include %s works\n", *include);
sprintf(nodeend, "includes");
if (define) {
put(node, define);
append(node, "\\n");
append(node, *include);
} else
put(node, *include);
break;
}
logprintf(logdepth+1, "include %s fails\n", *include);
if (out != NULL)
free(out);
}
if (*include == NULL) {
report("Not found\n");
return 1;
}
sprintf(nodeend, "presents");
put(node, strue);
/* check if typ is broken (smaller than void *) */
sprintf(test_c, test_c_broken, define, *include, typ);
if (compile_run(logdepth, test_c, NULL, NULL, NULL, &out) == 0) {
if ((out != NULL) && (strncmp(out, "yes", 3) == 0)) {
report("(%s is narrower than void *)\n", typ);
sprintf(nodeend, "broken");
put(node, strue);
res = 0;
}
else if ((out != NULL) && (strncmp(out, "no", 2) == 0)) {
report("(%s is not narrower than void *)\n", typ);
sprintf(nodeend, "broken");
put(node, sfalse);
res = 0;
}
else {
report("ERROR: test failed (%s)\n", out);
res = 1;
}
}
if (out != NULL)
free(out);
if (res == 0) {
report("Checking for size of %s... ", typ);
sprintf(test_c, test_c_size, define, *include, typ);
if (compile_run(logdepth, test_c, NULL, NULL, NULL, &out) == 0) {
if (out != NULL) {
report("(sizeof %s is %s)\n", typ, out);
sprintf(nodeend, "size");
put(node, out);
}
}
if (out != NULL)
free(out);
}
return res;
}
int find_types_size_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "size_t", NULL, NULL);
}
int find_types_off_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "off_t", NULL, NULL);
}
int find_types_off64_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "off64_t", NULL, NULL) &&
find_types_something_t(name, logdepth, fatal, "sys/types", "off64_t", "#define _LARGEFILE64_SOURCE", NULL);
}
int find_types_gid_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "gid_t", NULL, NULL);
}
int find_types_uid_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "uid_t", NULL, NULL);
}
int find_types_pid_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "pid_t", NULL, NULL);
}
int find_types_mode_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "mode_t", NULL, NULL);
}
int find_types_nlink_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "nlink_t", NULL, NULL);
}
int find_types_ptrdiff_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "ptrdiff_t", NULL, NULL);
}
int find_types_dev_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "dev_t", NULL, NULL);
}
int find_types_ino_t(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "ino_t", NULL, NULL);
}
int find_types_void_ptr(const char *name, int logdepth, int fatal)
{
return find_types_something_t(name, logdepth, fatal, "sys/types", "void *", NULL, NULL);
}