mirror of
https://github.com/Ed94/Odin.git
synced 2026-06-20 20:54:59 -07:00
Feoramund
85 lines
2.3 KiB
Odin
85 lines
2.3 KiB
Odin
package regex_compiler
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import "core:io"
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import "core:text/regex/common"
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import "core:text/regex/virtual_machine"
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get_jump_targets :: proc(code: []Opcode) -> (jump_targets: map[int]int) {
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iter := virtual_machine.Opcode_Iterator{ code, 0 }
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for opcode, pc in virtual_machine.iterate_opcodes(&iter) {
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#partial switch opcode {
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case .Jump:
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jmp := cast(int)(cast(^u16)&code[pc+1])^
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jump_targets[jmp] = pc
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case .Split:
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jmp_x := cast(int)(cast(^u16)&code[pc+1])^
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jmp_y := cast(int)(cast(^u16)&code[pc+3])^
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jump_targets[jmp_x] = pc
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jump_targets[jmp_y] = pc
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}
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}
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return
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}
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trace :: proc(w: io.Writer, code: []Opcode) {
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jump_targets := get_jump_targets(code)
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defer delete(jump_targets)
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iter := virtual_machine.Opcode_Iterator{ code, 0 }
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for opcode, pc in virtual_machine.iterate_opcodes(&iter) {
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if src, ok := jump_targets[pc]; ok {
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io.write_string(w, "--")
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common.write_padded_hex(w, src, 4)
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io.write_string(w, "--> ")
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} else {
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io.write_string(w, " ")
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}
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io.write_string(w, "[PC: ")
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common.write_padded_hex(w, pc, 4)
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io.write_string(w, "] ")
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io.write_string(w, virtual_machine.opcode_to_name(opcode))
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io.write_byte(w, ' ')
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#partial switch opcode {
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case .Byte:
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operand := cast(rune)code[pc+1]
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io.write_encoded_rune(w, operand)
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case .Rune:
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operand := (cast(^rune)&code[pc+1])^
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io.write_encoded_rune(w, operand)
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case .Rune_Class, .Rune_Class_Negated:
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operand := cast(u8)code[pc+1]
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common.write_padded_hex(w, operand, 2)
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case .Jump:
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jmp := (cast(^u16)&code[pc+1])^
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io.write_string(w, "-> $")
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common.write_padded_hex(w, jmp, 4)
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case .Split:
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jmp_x := (cast(^u16)&code[pc+1])^
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jmp_y := (cast(^u16)&code[pc+3])^
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io.write_string(w, "=> $")
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common.write_padded_hex(w, jmp_x, 4)
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io.write_string(w, ", $")
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common.write_padded_hex(w, jmp_y, 4)
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case .Save:
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operand := cast(u8)code[pc+1]
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common.write_padded_hex(w, operand, 2)
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case .Wait_For_Byte:
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operand := cast(rune)code[pc+1]
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io.write_encoded_rune(w, operand)
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case .Wait_For_Rune:
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operand := (cast(^rune)&code[pc+1])^
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io.write_encoded_rune(w, operand)
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case .Wait_For_Rune_Class:
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operand := cast(u8)code[pc+1]
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common.write_padded_hex(w, operand, 2)
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case .Wait_For_Rune_Class_Negated:
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operand := cast(u8)code[pc+1]
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common.write_padded_hex(w, operand, 2)
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}
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io.write_byte(w, '\n')
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}
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}
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