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Fix RGBLINK object type detection

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This commit is contained in:
Rangi
2025-11-18 22:01:43 -05:00
parent 3553c9c4da
commit a3d3e1525a
1 changed files with 15 additions and 14 deletions
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29
src/link/object.cpp
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@@ -420,19 +420,15 @@ void obj_ReadFile(std::string const &filePath, size_t fileID) {
}
Defer closeFile{[&] { fclose(file); }};
// First, check if the object is a RGBDS object or a SDCC one. If the first byte is 'R',
// we'll assume it's a RGBDS object file, and otherwise, that it's a SDCC object file.
int c = getc(file);
ungetc(c, file); // Guaranteed to work
switch (c) {
// First, check if the object is a RGBDS object, a SDCC one, or neither.
// A single `ungetc` is guaranteed to work.
switch (ungetc(getc(file), file)) {
case EOF:
fatal("File \"%s\" is empty!", fileName);
case 'R':
break;
default:
case 'X':
case 'D':
case 'Q': {
// This is (probably) a SDCC object file, defer the rest of detection to it.
// Since SDCC does not provide line info, everything will be reported as coming from the
// object file. It's better than nothing.
@@ -450,11 +446,16 @@ void obj_ReadFile(std::string const &filePath, size_t fileID) {
return;
}
// Begin by reading the magic bytes
int matchedElems;
case 'R':
// Check the magic byte signature for a RGB object file.
if (char magic[literal_strlen(RGBDS_OBJECT_VERSION_STRING)];
fread(magic, 1, sizeof(magic), file) == sizeof(magic)
&& !memcmp(magic, RGBDS_OBJECT_VERSION_STRING, sizeof(magic))) {
break;
}
[[fallthrough]];
if (fscanf(file, RGBDS_OBJECT_VERSION_STRING "%n", &matchedElems) == 1
&& matchedElems != literal_strlen(RGBDS_OBJECT_VERSION_STRING)) {
default:
fatal("%s: Not a RGBDS object file", fileName);
}