mirror of
https://github.com/JetSetIlly/Gopher2600.git
synced 2024-05-20 13:48:02 -04:00
77 lines
2.4 KiB
Go
77 lines
2.4 KiB
Go
// This file is part of Gopher2600.
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//
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// Gopher2600 is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Gopher2600 is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Gopher2600. If not, see <https://www.gnu.org/licenses/>.
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package debugger
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import (
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"fmt"
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"strings"
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"github.com/jetsetilly/gopher2600/debugger/terminal"
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"github.com/jetsetilly/gopher2600/disassembly"
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)
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func (dbg *Debugger) buildPrompt() terminal.Prompt {
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s := strings.Builder{}
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var e *disassembly.Entry
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// decide which address value to use
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if dbg.vcs.CPU.LastResult.Final || dbg.vcs.CPU.HasReset() {
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e = dbg.Disasm.GetEntryByAddress(dbg.vcs.CPU.PC.Address())
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} else {
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// if we're in the middle of an instruction then use the addresss in
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// lastResult. in these instances we want the prompt to report the
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// instruction that the CPU is working on, not the next one to be
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// stepped into.
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e = dbg.liveDisasmEntry
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}
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// build prompt based on how confident we are of the contents of the
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// disassembly entry. starting with the condition of no disassembly at all
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if e == nil {
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s.WriteString(fmt.Sprintf("$%04x", dbg.vcs.CPU.PC.Address()))
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} else if e.Level == disassembly.EntryLevelUnmappable {
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s.WriteString(e.Address)
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} else {
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// this is the ideal path. the address is in the disassembly and we've
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// decoded it already
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s.WriteString(fmt.Sprintf("%s %s", e.Address, e.Operator))
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if e.Operand.Resolve() != "" {
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s.WriteString(fmt.Sprintf(" %s", e.Operand.Resolve()))
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}
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}
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p := terminal.Prompt{
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Content: s.String(),
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Recording: dbg.scriptScribe.IsActive(),
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}
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if coproc := dbg.vcs.Mem.Cart.GetCoProcBus(); coproc != nil {
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state := coproc.CoProcExecutionState()
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p.CoProcYield = state.Yield
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}
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// LastResult final is false on CPU reset so we must check for that also
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if dbg.vcs.CPU.LastResult.Final || dbg.vcs.CPU.HasReset() {
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p.Type = terminal.PromptTypeCPUStep
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} else {
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p.Type = terminal.PromptTypeVideoStep
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}
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return p
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}
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