weaselab/weaseljson
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This commit is contained in:
Andrew Noyes
2025-06-24 15:10:01 -04:00
parent 63a1be497b
commit a8aab0187e
1 changed files with 11 additions and 5 deletions
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16
src/parser3.h
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@@ -17,6 +17,7 @@
namespace parser3 { namespace parser3 {
// Calling a continuation with buf == bufEnd means end of input
typedef PRESERVE_NONE WeaselJsonStatus (*Continuation)(struct Parser3 *, typedef PRESERVE_NONE WeaselJsonStatus (*Continuation)(struct Parser3 *,
char *buf, char *bufEnd); char *buf, char *bufEnd);
@@ -92,6 +93,9 @@ struct Parser3 {
assert(!empty()); assert(!empty());
--stackPtr; --stackPtr;
} }
// Pushing symbols onto the stack roughly corresponds with "parse these
// nonterminals/terminals in order"
[[nodiscard]] WeaselJsonStatus push(std::initializer_list<Symbol> symbols) { [[nodiscard]] WeaselJsonStatus push(std::initializer_list<Symbol> symbols) {
if (stackEnd - stackPtr < ptrdiff_t(symbols.size())) [[unlikely]] { if (stackEnd - stackPtr < ptrdiff_t(symbols.size())) [[unlikely]] {
return WeaselJson_OVERFLOW; return WeaselJson_OVERFLOW;
@@ -101,6 +105,7 @@ struct Parser3 {
} }
return WeaselJson_OK; return WeaselJson_OK;
} }
[[nodiscard]] Symbol top() const { [[nodiscard]] Symbol top() const {
assert(!empty()); assert(!empty());
return *(stackPtr - 1); return *(stackPtr - 1);
@@ -165,11 +170,12 @@ inline PRESERVE_NONE WeaselJsonStatus n_whitespace(Parser3 *self, char *buf,
inline PRESERVE_NONE WeaselJsonStatus n_number(Parser3 *self, char *buf, inline PRESERVE_NONE WeaselJsonStatus n_number(Parser3 *self, char *buf,
char *bufEnd) { char *bufEnd) {
bool complete = buf == bufEnd; if (buf != bufEnd) {
buf = (char *)self->numDfa.scan(buf, bufEnd); buf = (char *)self->numDfa.scan(buf, bufEnd);
if (buf == bufEnd && !complete) { if (buf == bufEnd) {
self->flushNumber(false, buf); self->flushNumber(false, buf);
return WeaselJson_AGAIN; return WeaselJson_AGAIN;
}
} }
if (!self->numDfa.accept()) [[unlikely]] { if (!self->numDfa.accept()) [[unlikely]] {
return WeaselJson_REJECT; return WeaselJson_REJECT;