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feat(lexer, preprocessor): replace cstring conversion with copy and refactor macro expansion

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- Replace `scc_cstring_from_cstr(scc_cstring_as_cstr(...))` with `scc_cstring_copy()` in lexer to fix memory leaks
- Extract macro expansion logic into separate `expand_macro.c` file
- Remove `expand_stack` parameter from `scc_pp_expand_macro()` function
- Add new parsing functions for macro replacement lists and arguments
- Add string utility functions for whitespace trimming and string joining
- Update memory stream documentation for clarity
This commit is contained in:
zzy
2025-12-15 20:24:39 +08:00
parent 73d74f5e13
commit 07f5d9331b
15 changed files with 574 additions and 346 deletions
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23
runtime/libcore/src/stream.c
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@@ -125,7 +125,7 @@ static void mem_probe_stream_drop(scc_probe_stream_t *_stream) {
scc_probe_stream_t *scc_mem_probe_stream_init(scc_mem_probe_stream_t *stream,
const char *data, usize length,
cbool need_copy) {
cbool owned) {
if (stream == null || data == null) {
LOG_ERROR("param error");
return null;
@@ -133,22 +133,11 @@ scc_probe_stream_t *scc_mem_probe_stream_init(scc_mem_probe_stream_t *stream,
if (length == 0) {
LOG_WARN("input memory is empty");
need_copy = false;
owned = false;
}
stream->owned = need_copy;
if (need_copy) {
char *buf = (char *)scc_malloc(length);
if (buf == null) {
LOG_ERROR("malloc error");
return null;
}
scc_memcpy(buf, data, length);
stream->data = buf;
} else {
stream->data = data;
}
stream->owned = owned;
stream->data = data;
stream->data_length = length;
stream->curr_pos = 0;
stream->probe_pos = 0;
@@ -176,7 +165,7 @@ static void scc_owned_mem_stream_drop(scc_probe_stream_t *_stream) {
}
scc_probe_stream_t *scc_mem_probe_stream_new(const char *data, usize length,
cbool need_copy) {
cbool owned) {
scc_mem_probe_stream_t *stream =
(scc_mem_probe_stream_t *)scc_malloc(sizeof(scc_mem_probe_stream_t));
if (stream == null) {
@@ -184,7 +173,7 @@ scc_probe_stream_t *scc_mem_probe_stream_new(const char *data, usize length,
}
scc_probe_stream_t *ret =
scc_mem_probe_stream_init(stream, data, length, need_copy);
scc_mem_probe_stream_init(stream, data, length, owned);
stream->stream.drop = scc_owned_mem_stream_drop;
Assert(ret != null);
return ret;