| 1 | #include <string>
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| 2 | #include <stdio.h>
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| 3 | #include <stdlib.h>
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| 4 |
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| 5 | #include "arith.asdl.h"
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| 6 |
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| 7 | void PrintExpr(const uint32_t* base, const arith_expr_t& e, int indent) {
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| 8 | for (int i = 0; i < indent; ++i) {
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| 9 | putchar('\t');
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| 10 | }
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| 11 | printf("t%hhu ", e.tag());
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| 12 |
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| 13 | switch (e.tag()) {
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| 14 | case arith_expr_e::Const: {
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| 15 | auto& e2 = static_cast<const Const&>(e);
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| 16 | printf("CONST %d\n", e2.i());
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| 17 | break;
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| 18 | }
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| 19 | case arith_expr_e::ArithVar: {
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| 20 | auto& e2 = static_cast<const ArithVar&>(e);
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| 21 | printf("VAR %s\n", e2.name(base));
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| 22 | break;
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| 23 | }
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| 24 | case arith_expr_e::ArithUnary: {
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| 25 | auto& e2 = static_cast<const ArithUnary&>(e);
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| 26 | printf("UNARY\n");
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| 27 | break;
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| 28 | }
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| 29 | case arith_expr_e::ArithBinary: {
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| 30 | auto& e2 = static_cast<const ArithBinary&>(e);
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| 31 | printf("BINARY\n");
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| 32 | for (int i = 0; i < indent+1; ++i) {
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| 33 | putchar('\t');
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| 34 | }
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| 35 | // TODO:
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| 36 | // char* DebugString(op_id_e op_id)
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| 37 | //printf("INT %d\n", e2.Int(1));
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| 38 | printf("%hhu\n", e2.op_id());
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| 39 |
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| 40 | PrintExpr(base, e2.left(base), indent+1);
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| 41 | PrintExpr(base, e2.right(base), indent+1);
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| 42 | break;
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| 43 | }
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| 44 | case arith_expr_e::FuncCall: {
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| 45 | auto& e2 = static_cast<const FuncCall&>(e);
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| 46 | printf("FUNC CALL\n");
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| 47 | for (int i = 0; i < indent+1; ++i) {
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| 48 | putchar('\t');
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| 49 | }
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| 50 | printf("name %s\n", e2.name(base));
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| 51 | for (int i = 0; i < e2.args_size(base); ++i) {
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| 52 | PrintExpr(base, e2.args(base, i), indent+1);
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| 53 | }
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| 54 | break;
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| 55 | }
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| 56 | case arith_expr_e::Index: {
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| 57 | auto& e2 = static_cast<const Index&>(e);
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| 58 | printf("INDEX\n");
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| 59 | PrintExpr(base, e2.a(base), indent+1);
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| 60 | PrintExpr(base, e2.index(base), indent+1);
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| 61 | break;
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| 62 | }
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| 63 | case arith_expr_e::Slice: {
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| 64 | auto& e2 = static_cast<const Slice&>(e);
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| 65 | printf("SLICE\n");
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| 66 | const arith_expr_t* begin = e2.begin(base);
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| 67 | const arith_expr_t* end = e2.end(base);
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| 68 | const arith_expr_t* stride = e2.stride(base);
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| 69 | PrintExpr(base, e2.a(base), indent+1);
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| 70 | if (begin) PrintExpr(base, *begin, indent+1);
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| 71 | if (end) PrintExpr(base, *end, indent+1);
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| 72 | if (stride) {
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| 73 | PrintExpr(base, *stride, indent+1);
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| 74 | } else {
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| 75 | for (int i = 0; i < indent+1; ++i) {
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| 76 | putchar('\t');
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| 77 | }
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| 78 | printf("stride: %p\n", stride);
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| 79 | }
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| 80 | break;
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| 81 | }
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| 82 | default:
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| 83 | printf("OTHER\n");
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| 84 | break;
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | // Returns the root ref, or -1 for invalid
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| 89 | int GetRootRef(uint8_t* image) {
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| 90 | if (image[0] != 'O') return -1;
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| 91 | if (image[1] != 'H') return -1;
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| 92 | if (image[2] != 'P') return -1;
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| 93 | if (image[3] != 1) return -1; // version 1
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| 94 | if (image[4] != 4) return -1; // alignment 4
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| 95 |
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| 96 | return image[5] + (image[6] << 8) + (image[7] << 16);
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| 97 | }
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| 98 |
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| 99 | int main(int argc, char **argv) {
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| 100 | if (argc == 0) {
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| 101 | printf("Expected filename\n");
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| 102 | return 1;
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| 103 | }
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| 104 | FILE *f = fopen(argv[1], "rb");
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| 105 | if (!f) {
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| 106 | printf("Error opening %s", argv[1]);
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| 107 | return 1;
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| 108 | }
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| 109 | fseek(f, 0, SEEK_END);
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| 110 | size_t num_bytes = ftell(f);
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| 111 | fseek(f, 0, SEEK_SET); //same as rewind(f);
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| 112 |
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| 113 | uint8_t* image = static_cast<uint8_t*>(malloc(num_bytes + 1));
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| 114 | fread(image, num_bytes, 1, f);
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| 115 | fclose(f);
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| 116 |
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| 117 | image[num_bytes] = 0;
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| 118 | printf("Read %zu bytes\n", num_bytes);
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| 119 |
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| 120 | int root_ref = GetRootRef(image);
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| 121 | if (root_ref == -1) {
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| 122 | printf("Invalid image\n");
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| 123 | return 1;
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| 124 | }
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| 125 | // Hm we could make the root ref be a BYTE offset?
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| 126 | int alignment = 4;
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| 127 | printf("alignment: %d root: %d\n", alignment, root_ref);
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| 128 |
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| 129 | auto base = reinterpret_cast<uint32_t*>(image);
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| 130 |
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| 131 | size_t offset = alignment * root_ref + 0;
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| 132 | auto expr = reinterpret_cast<arith_expr_t*>(image + offset);
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| 133 | PrintExpr(base, *expr, 0);
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| 134 | }
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