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parser: refactor loops in yylex()

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The first character in a symbol or numeric value in a number will not
go beyond the end of the token buffer.  Knowing this, the loops in
yylex() can be rearranged to use while () instead of do...while ().

Signed-off-by: Alex Elder <elder@linaro.org>
Message-Id: <20211001232338.769309-30-elder@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Alex Elder 2021-10-01 18:23:33 -05:00 committed by Bjorn Andersson
parent b6b7384256
commit 734ecff5a5
1 changed files with 6 additions and 6 deletions
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12
parser.c
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@ -218,14 +218,14 @@ static struct token yylex()
;
if (isalpha(ch)) {
do {
*p++ = ch;
while ((ch = input()) && (isalnum(ch) || ch == '_')) {
if (p - buf == sizeof(buf)) {
buf[TOKEN_BUF_MIN] = '\0';
yyerror("token too long: \"%s...\"", buf);
}
*p++ = ch;
ch = input();
} while (isalnum(ch) || ch == '_');
}
unput(ch);
*p = '\0';
@ -275,14 +275,14 @@ static struct token yylex()
base = 10;
}
do {
*p++ = ch;
while ((ch = input()) && isvalid(ch)) {
if (p - buf == sizeof(buf)) {
buf[TOKEN_BUF_MIN] = '\0';
yyerror("number too long: \"%s...\"", buf);
}
*p++ = ch;
ch = input();
} while (isvalid(ch));
}
unput(ch);
*p = '\0';