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if-else chain now is an iteration over a table

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cozis
2022-04-02 01:37:52 +02:00
parent a6817ddcf9
commit 6c0e03f824
1 changed files with 27 additions and 49 deletions
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src/compiler/parse.c
+27 -49
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@@ -309,62 +309,40 @@ static Token *tokenize(Source *src, BPAlloc *alloc, Error *error)
// Determine the token
#define matchop(str, len, const_str) \
(len == sizeof(const_str)-1 && !strncmp(str, const_str, sizeof(const_str)-1))
static const struct {
TokenKind kind;
int size;
const char *text;
} optable[] = {
{ TADD, 1, "+" },
{ TSUB, 1, "-" },
{ TMUL, 1, "*" },
{ TDIV, 1, "/" },
{ TEQL, 2, "==" },
{ TNQL, 2, "!=" },
{ TLSS, 1, "<" },
{ TLEQ, 2, "<=" },
{ TGRT, 1, ">" },
{ TGEQ, 2, ">=" },
{ TASS, 1, "=" },
};
if(matchop(str + tok->offset, tok->length, "+"))
{
tok->kind = TADD;
}
else if(matchop(str + tok->offset, tok->length, "-"))
{
tok->kind = TSUB;
}
else if(matchop(str + tok->offset, tok->length, "*"))
{
tok->kind = TMUL;
}
else if(matchop(str + tok->offset, tok->length, "/"))
{
tok->kind = TDIV;
}
else if(matchop(str + tok->offset, tok->length, "=="))
{
tok->kind = TEQL;
}
else if(matchop(str + tok->offset, tok->length, "!="))
{
tok->kind = TNQL;
}
else if(matchop(str + tok->offset, tok->length, "<"))
{
tok->kind = TLSS;
}
else if(matchop(str + tok->offset, tok->length, "<="))
{
tok->kind = TLEQ;
}
else if(matchop(str + tok->offset, tok->length, ">"))
{
tok->kind = TGRT;
}
else if(matchop(str + tok->offset, tok->length, ">="))
{
tok->kind = TGEQ;
}
else if(matchop(str + tok->offset, tok->length, "="))
{
tok->kind = TASS;
}
else
_Bool found = 0;
for(unsigned int i = 0; i < sizeof(optable)/sizeof(*optable); i += 1)
if(optable[i].size == tok->length && !strncmp(optable[i].text, str + tok->offset, tok->length))
{
found = 1;
tok->kind = optable[i].kind;
break;
}
if(found == 0)
{
// Not a known operator.
tok->kind = str[tok->offset];
tok->length = 1;
i = tok->offset + 1;
}
#undef matchop
}
else
{