| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "Charmonizer/Core/HeaderChecker.h" |
| #include "Charmonizer/Core/Compiler.h" |
| #include "Charmonizer/Core/ConfWriter.h" |
| #include "Charmonizer/Core/Util.h" |
| #include "Charmonizer/Probe/LargeFiles.h" |
| #include <errno.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| /* Module vars. */ |
| static struct { |
| char off64_type[10]; |
| } chaz_LargeFiles = { "" }; |
| |
| /* Sets of symbols which might provide large file support for stdio. */ |
| typedef struct chaz_LargeFiles_stdio64_combo { |
| const char *includes; |
| const char *fopen_command; |
| const char *ftell_command; |
| const char *fseek_command; |
| } chaz_LargeFiles_stdio64_combo; |
| |
| /* Sets of symbols which might provide large file support for unbuffered i/o. |
| */ |
| typedef struct chaz_LargeFiles_unbuff_combo { |
| const char *includes; |
| const char *lseek_command; |
| const char *pread64_command; |
| } chaz_LargeFiles_unbuff_combo; |
| |
| /* Check for a 64-bit file pointer type. |
| */ |
| static int |
| chaz_LargeFiles_probe_off64(void); |
| |
| /* Check what name 64-bit ftell, fseek go by. |
| */ |
| static void |
| chaz_LargeFiles_probe_stdio64(void); |
| static int |
| chaz_LargeFiles_try_stdio64(chaz_LargeFiles_stdio64_combo *combo); |
| |
| /* Probe for 64-bit unbuffered i/o. |
| */ |
| static void |
| chaz_LargeFiles_probe_unbuff(void); |
| |
| /* Check for a 64-bit lseek. |
| */ |
| static int |
| chaz_LargeFiles_probe_lseek(chaz_LargeFiles_unbuff_combo *combo); |
| |
| /* Check for a 64-bit pread. |
| */ |
| static int |
| chaz_LargeFiles_probe_pread64(chaz_LargeFiles_unbuff_combo *combo); |
| |
| void |
| chaz_LargeFiles_run(void) { |
| int found_off64_t = false; |
| const char *stat_includes = "#include <stdio.h>\n#include <sys/stat.h>"; |
| |
| chaz_ConfWriter_start_module("LargeFiles"); |
| |
| /* Find off64_t or equivalent. */ |
| found_off64_t = chaz_LargeFiles_probe_off64(); |
| if (found_off64_t) { |
| chaz_ConfWriter_add_def("HAS_64BIT_OFFSET_TYPE", NULL); |
| chaz_ConfWriter_add_def("off64_t", chaz_LargeFiles.off64_type); |
| } |
| |
| /* See if stdio variants with 64-bit support exist. */ |
| chaz_LargeFiles_probe_stdio64(); |
| |
| /* Probe for 64-bit versions of lseek and pread (if we have an off64_t). */ |
| if (found_off64_t) { |
| chaz_LargeFiles_probe_unbuff(); |
| } |
| |
| /* Make checks needed for testing. */ |
| if (chaz_HeadCheck_check_header("sys/stat.h")) { |
| chaz_ConfWriter_append_conf("#define CHAZ_HAS_SYS_STAT_H\n"); |
| } |
| if (chaz_HeadCheck_check_header("io.h")) { |
| chaz_ConfWriter_append_conf("#define CHAZ_HAS_IO_H\n"); |
| } |
| if (chaz_HeadCheck_check_header("fcntl.h")) { |
| chaz_ConfWriter_append_conf("#define CHAZ_HAS_FCNTL_H\n"); |
| } |
| if (chaz_HeadCheck_contains_member("struct stat", "st_size", stat_includes)) { |
| chaz_ConfWriter_append_conf("#define CHAZ_HAS_STAT_ST_SIZE\n"); |
| } |
| if (chaz_HeadCheck_contains_member("struct stat", "st_blocks", stat_includes)) { |
| chaz_ConfWriter_append_conf("#define CHAZ_HAS_STAT_ST_BLOCKS\n"); |
| } |
| |
| chaz_ConfWriter_end_module(); |
| } |
| |
| static int |
| chaz_LargeFiles_probe_off64(void) { |
| static const char off64_code[] = |
| CHAZ_QUOTE( %s ) |
| CHAZ_QUOTE( int a[sizeof(%s)==8?1:-1]; ); |
| char code_buf[sizeof(off64_code) + 100]; |
| int i; |
| int success = false; |
| static const char* off64_options[] = { |
| "off64_t", |
| "off_t", |
| "__int64", |
| "long" |
| }; |
| int num_off64_options = sizeof(off64_options) / sizeof(off64_options[0]); |
| |
| for (i = 0; i < num_off64_options; i++) { |
| const char *candidate = off64_options[i]; |
| int has_sys_types_h = chaz_HeadCheck_check_header("sys/types.h"); |
| const char *sys_types_include = has_sys_types_h |
| ? "#include <sys/types.h>" |
| : ""; |
| |
| /* Execute the probe. */ |
| sprintf(code_buf, off64_code, sys_types_include, candidate); |
| if (chaz_CC_test_compile(code_buf)) { |
| strcpy(chaz_LargeFiles.off64_type, candidate); |
| success = true; |
| break; |
| } |
| } |
| return success; |
| } |
| |
| static int |
| chaz_LargeFiles_try_stdio64(chaz_LargeFiles_stdio64_combo *combo) { |
| static const char stdio64_code[] = |
| CHAZ_QUOTE( %s ) |
| CHAZ_QUOTE( #include <stdio.h> ) |
| CHAZ_QUOTE( int a[sizeof(%s)==8?1:-1]; ) |
| CHAZ_QUOTE( int main() { ) |
| CHAZ_QUOTE( FILE *f = %s("_charm_stdio64", "w"); ) |
| CHAZ_QUOTE( %s pos = %s(f); ) |
| CHAZ_QUOTE( %s(f, 0, SEEK_SET); ) |
| CHAZ_QUOTE( return 0; ) |
| CHAZ_QUOTE( } ); |
| char code_buf[sizeof(stdio64_code) + 200]; |
| |
| /* Prepare the source code. */ |
| sprintf(code_buf, stdio64_code, combo->includes, |
| chaz_LargeFiles.off64_type, combo->fopen_command, |
| chaz_LargeFiles.off64_type, combo->ftell_command, |
| combo->fseek_command); |
| |
| /* Verify compilation and that the offset type has 8 bytes. */ |
| return chaz_CC_test_link(code_buf); |
| } |
| |
| static void |
| chaz_LargeFiles_probe_stdio64(void) { |
| int i; |
| static chaz_LargeFiles_stdio64_combo stdio64_combos[] = { |
| { "#include <sys/types.h>\n", "fopen64", "ftello64", "fseeko64" }, |
| { "#include <sys/types.h>\n", "fopen", "ftello64", "fseeko64" }, |
| { "#include <sys/types.h>\n", "fopen", "ftello", "fseeko" }, |
| { "", "fopen", "ftell", "fseek" }, |
| { "", "fopen", "_ftelli64", "_fseeki64" }, |
| { "", "fopen", "ftell", "fseek" }, |
| { NULL, NULL, NULL, NULL } |
| }; |
| |
| for (i = 0; stdio64_combos[i].includes != NULL; i++) { |
| chaz_LargeFiles_stdio64_combo combo = stdio64_combos[i]; |
| if (chaz_LargeFiles_try_stdio64(&combo)) { |
| chaz_ConfWriter_add_def("HAS_64BIT_STDIO", NULL); |
| chaz_ConfWriter_add_def("fopen64", combo.fopen_command); |
| chaz_ConfWriter_add_def("ftello64", combo.ftell_command); |
| chaz_ConfWriter_add_def("fseeko64", combo.fseek_command); |
| break; |
| } |
| } |
| } |
| |
| static int |
| chaz_LargeFiles_probe_lseek(chaz_LargeFiles_unbuff_combo *combo) { |
| static const char lseek_code[] = |
| CHAZ_QUOTE( %s ) |
| CHAZ_QUOTE( int main() { ) |
| CHAZ_QUOTE( %s(0, 0, SEEK_SET); ) |
| CHAZ_QUOTE( return 0; ) |
| CHAZ_QUOTE( } ); |
| char code_buf[sizeof(lseek_code) + 100]; |
| |
| /* Verify compilation. */ |
| sprintf(code_buf, lseek_code, combo->includes, combo->lseek_command); |
| return chaz_CC_test_link(code_buf); |
| } |
| |
| static int |
| chaz_LargeFiles_probe_pread64(chaz_LargeFiles_unbuff_combo *combo) { |
| /* Code for checking 64-bit pread. The pread call will fail, but that's |
| * fine as long as it compiles. */ |
| static const char pread64_code[] = |
| CHAZ_QUOTE( %s ) |
| CHAZ_QUOTE( int main() { ) |
| CHAZ_QUOTE( char buf[1]; ) |
| CHAZ_QUOTE( %s(0, buf, 1, 1); ) |
| CHAZ_QUOTE( return 0; ) |
| CHAZ_QUOTE( } ); |
| char code_buf[sizeof(pread64_code) + 100]; |
| |
| /* Verify compilation. */ |
| sprintf(code_buf, pread64_code, combo->includes, combo->pread64_command); |
| return chaz_CC_test_link(code_buf); |
| } |
| |
| static void |
| chaz_LargeFiles_probe_unbuff(void) { |
| static chaz_LargeFiles_unbuff_combo unbuff_combos[] = { |
| { "#include <unistd.h>\n#include <fcntl.h>\n", "lseek64", "pread64" }, |
| { "#include <unistd.h>\n#include <fcntl.h>\n", "lseek", "pread" }, |
| { "#include <io.h>\n#include <stdio.h>\n", "_lseeki64", "NO_PREAD64" }, |
| { NULL, NULL, NULL } |
| }; |
| int i; |
| |
| for (i = 0; unbuff_combos[i].lseek_command != NULL; i++) { |
| chaz_LargeFiles_unbuff_combo combo = unbuff_combos[i]; |
| if (chaz_LargeFiles_probe_lseek(&combo)) { |
| chaz_ConfWriter_add_def("HAS_64BIT_LSEEK", NULL); |
| chaz_ConfWriter_add_def("lseek64", combo.lseek_command); |
| break; |
| } |
| } |
| for (i = 0; unbuff_combos[i].pread64_command != NULL; i++) { |
| chaz_LargeFiles_unbuff_combo combo = unbuff_combos[i]; |
| if (chaz_LargeFiles_probe_pread64(&combo)) { |
| chaz_ConfWriter_add_def("HAS_64BIT_PREAD", NULL); |
| chaz_ConfWriter_add_def("pread64", combo.pread64_command); |
| break; |
| } |
| } |
| } |
| |
