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//
// asm2wasm console tool
//
#include "asm2wasm.h"
using namespace cashew;
using namespace wasm;
int main(int argc, char **argv) {
debug = getenv("ASM2WASM_DEBUG") ? getenv("ASM2WASM_DEBUG")[0] - '0' : 0;
char *infile = argv[1];
if (debug) std::cerr << "loading '" << infile << "'...\n";
FILE *f = fopen(argv[1], "r");
assert(f);
fseek(f, 0, SEEK_END);
int size = ftell(f);
char *input = new char[size+1];
rewind(f);
int num = fread(input, 1, size, f);
// On Windows, ftell() gives the byte position (\r\n counts as two bytes), but when
// reading, fread() returns the number of characters read (\r\n is read as one char \n, and counted as one),
// so return value of fread can be less than size reported by ftell, and that is normal.
assert((num > 0 || size == 0) && num <= size);
fclose(f);
input[num] = 0;
// emcc --separate-asm modules look like
//
// Module["asm"] = (function(global, env, buffer) {
// ..
// });
//
// we need to clean that up.
if (*input == 'M') {
while (*input != 'f') {
input++;
num--;
}
char *end = input + num - 1;
while (*end != '}') {
*end = 0;
end--;
}
}
if (debug) std::cerr << "parsing...\n";
cashew::Parser<Ref, DotZeroValueBuilder> builder;
Ref asmjs = builder.parseToplevel(input);
if (debug) std::cerr << "wasming...\n";
Module wasm;
wasm.memory.initial = wasm.memory.max = 16*1024*1024; // we would normally receive this from the compiler
Asm2WasmBuilder asm2wasm(wasm);
asm2wasm.processAsm(asmjs);
if (debug) std::cerr << "optimizing...\n";
asm2wasm.optimize();
if (debug) std::cerr << "printing...\n";
std::cout << wasm;
if (debug) std::cerr << "done.\n";
}
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