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/*
* Copyright 2016 WebAssembly Community Group participants
*
* Licensed 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 "wabt/common.h"
#include <cassert>
#include <cerrno>
#include <climits>
#include <cstdint>
#include <cstdio>
#include <cstring>
#include <sys/stat.h>
#include <sys/types.h>
#if COMPILER_IS_MSVC
#include <fcntl.h>
#include <io.h>
#include <stdlib.h>
#define PATH_MAX _MAX_PATH
#define stat _stat
#define S_IFREG _S_IFREG
#endif
namespace wabt {
Reloc::Reloc(RelocType type, Offset offset, Index index, int32_t addend)
: type(type), offset(offset), index(index), addend(addend) {}
const char* g_kind_name[] = {"func", "table", "memory", "global", "tag"};
WABT_STATIC_ASSERT(WABT_ARRAY_SIZE(g_kind_name) == kExternalKindCount);
const char* g_reloc_type_name[] = {
"R_WASM_FUNCTION_INDEX_LEB", "R_WASM_TABLE_INDEX_SLEB",
"R_WASM_TABLE_INDEX_I32", "R_WASM_MEMORY_ADDR_LEB",
"R_WASM_MEMORY_ADDR_SLEB", "R_WASM_MEMORY_ADDR_I32",
"R_WASM_TYPE_INDEX_LEB", "R_WASM_GLOBAL_INDEX_LEB",
"R_WASM_FUNCTION_OFFSET_I32", "R_WASM_SECTION_OFFSET_I32",
"R_WASM_TAG_INDEX_LEB", "R_WASM_MEMORY_ADDR_REL_SLEB",
"R_WASM_TABLE_INDEX_REL_SLEB", "R_WASM_GLOBAL_INDEX_I32",
"R_WASM_MEMORY_ADDR_LEB64", "R_WASM_MEMORY_ADDR_SLEB64",
"R_WASM_MEMORY_ADDR_I64", "R_WASM_MEMORY_ADDR_REL_SLEB64",
"R_WASM_TABLE_INDEX_SLEB64", "R_WASM_TABLE_INDEX_I64",
"R_WASM_TABLE_NUMBER_LEB", "R_WASM_MEMORY_ADDR_TLS_SLEB",
"R_WASM_MEMORY_ADDR_TLS_I32",
};
WABT_STATIC_ASSERT(WABT_ARRAY_SIZE(g_reloc_type_name) == kRelocTypeCount);
static Result ReadStdin(std::vector<uint8_t>* out_data) {
out_data->resize(0);
uint8_t buffer[4096];
while (true) {
size_t bytes_read = fread(buffer, 1, sizeof(buffer), stdin);
if (bytes_read == 0) {
if (ferror(stdin)) {
fprintf(stderr, "error reading from stdin: %s\n", strerror(errno));
return Result::Error;
}
return Result::Ok;
}
size_t old_size = out_data->size();
out_data->resize(old_size + bytes_read);
memcpy(out_data->data() + old_size, buffer, bytes_read);
}
}
Result ReadFile(std::string_view filename, std::vector<uint8_t>* out_data) {
std::string filename_str(filename);
const char* filename_cstr = filename_str.c_str();
if (filename == "-") {
return ReadStdin(out_data);
}
struct stat statbuf;
if (stat(filename_cstr, &statbuf) < 0) {
fprintf(stderr, "%s: %s\n", filename_cstr, strerror(errno));
return Result::Error;
}
if (!(statbuf.st_mode & S_IFREG)) {
fprintf(stderr, "%s: not a regular file\n", filename_cstr);
return Result::Error;
}
FILE* infile = fopen(filename_cstr, "rb");
if (!infile) {
fprintf(stderr, "%s: %s\n", filename_cstr, strerror(errno));
return Result::Error;
}
if (fseek(infile, 0, SEEK_END) < 0) {
perror("fseek to end failed");
fclose(infile);
return Result::Error;
}
long size = ftell(infile);
if (size < 0) {
perror("ftell failed");
fclose(infile);
return Result::Error;
}
if (fseek(infile, 0, SEEK_SET) < 0) {
perror("fseek to beginning failed");
fclose(infile);
return Result::Error;
}
out_data->resize(size);
if (size != 0 && fread(out_data->data(), size, 1, infile) != 1) {
fprintf(stderr, "%s: fread failed: %s\n", filename_cstr, strerror(errno));
fclose(infile);
return Result::Error;
}
fclose(infile);
return Result::Ok;
}
void InitStdio() {
#if COMPILER_IS_MSVC
int result = _setmode(_fileno(stdout), _O_BINARY);
if (result == -1) {
perror("Cannot set mode binary to stdout");
}
result = _setmode(_fileno(stderr), _O_BINARY);
if (result == -1) {
perror("Cannot set mode binary to stderr");
}
#endif
}
} // namespace wabt
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