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expr.c (interpret_float_suffix): Support hr, r, lr, llr, uhr, ur, ulr, ullr, hk, k, lk, llk, uhk, uk, ulk, ullk.

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* expr.c (interpret_float_suffix): Support hr, r, lr, llr, uhr, ur,
	ulr, ullr, hk, k, lk, llk, uhk, uk, ulk, ullk.
	(cpp_classify_number): Support decimal fixed-point constants without
	exponents.
	Warn about fixed-point constants when -pedantic.
	* include/cpplib.h (CPP_N_SMALL, CPP_N_MEDIUM, CPP_N_LARGE): Change
	comments to support fixed-point values.
	(CPP_N_FRACT, CPP_N_ACCUM): Define.

From-SVN: r127940
This commit is contained in:
Chao-ying Fu 2007-08-30 23:05:17 +00:00 • committed by Chao-ying Fu
parent 07368af083
commit ac6b1c676c
3 changed files with 80 additions and 4 deletions
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63
libcpp/expr.c
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@ -83,12 +83,18 @@ static unsigned int
interpret_float_suffix (const uchar *s, size_t len)
{
size_t f, l, w, q, i, d;
size_t r, k, u, h;
f = l = w = q = i = d = 0;
r = k = u = h = 0;
while (len--)
switch (s[len])
{
case 'r': case 'R': r++; break;
case 'k': case 'K': k++; break;
case 'u': case 'U': u++; break;
case 'h': case 'H': h++; break;
case 'f': case 'F':
if (d > 0)
return 0;
@ -98,6 +104,9 @@ interpret_float_suffix (const uchar *s, size_t len)
if (d > 0)
return 0;
l++;
/* If there are two Ls, they must be adjacent and the same case. */
if (l == 2 && s[len] != s[len + 1])
return 0;
break;
case 'w': case 'W':
if (d > 0)
@ -116,7 +125,34 @@ interpret_float_suffix (const uchar *s, size_t len)
return 0;
}
if (f + l + w + q > 1 || i > 1)
if (r + k > 1 || h > 1 || l > 2 || u > 1)
return 0;
if (r == 1)
{
if (f || i || d || w || q)
return 0;
return (CPP_N_FRACT
| (u ? CPP_N_UNSIGNED : 0)
| (h ? CPP_N_SMALL :
l == 2 ? CPP_N_LARGE :
l == 1 ? CPP_N_MEDIUM : 0));
}
if (k == 1)
{
if (f || i || d || w || q)
return 0;
return (CPP_N_ACCUM
| (u ? CPP_N_UNSIGNED : 0)
| (h ? CPP_N_SMALL :
l == 2 ? CPP_N_LARGE :
l == 1 ? CPP_N_MEDIUM : 0));
}
if (f + l + w + q > 1 || i > 1 || h + u > 0)
return 0;
/* Allow dd, df, dl suffixes for decimal float constants. */
@ -238,6 +274,26 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token)
}
}
/* The suffix may be for decimal fixed-point constants without exponent. */
if (radix != 16 && float_flag == NOT_FLOAT)
{
result = interpret_float_suffix (str, limit - str);
if ((result & CPP_N_FRACT) || (result & CPP_N_ACCUM))
{
result |= CPP_N_FLOATING;
/* We need to restore the radix to 10, if the radix is 8. */
if (radix == 8)
radix = 10;
if (CPP_PEDANTIC (pfile))
cpp_error (pfile, CPP_DL_PEDWARN,
"fixed-point constants are a GCC extension");
goto syntax_ok;
}
else
result = 0;
}
if (float_flag != NOT_FLOAT && radix == 8)
radix = 10;
@ -304,6 +360,10 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token)
return CPP_N_INVALID;
}
if ((result & (CPP_N_FRACT | CPP_N_ACCUM)) && CPP_PEDANTIC (pfile))
cpp_error (pfile, CPP_DL_PEDWARN,
"fixed-point constants are a GCC extension");
if ((result & CPP_N_DFLOAT) && CPP_PEDANTIC (pfile))
cpp_error (pfile, CPP_DL_PEDWARN,
"decimal float constants are a GCC extension");
@ -343,6 +403,7 @@ cpp_classify_number (cpp_reader *pfile, const cpp_token *token)
result |= CPP_N_INTEGER;
}
syntax_ok:
if ((result & CPP_N_IMAGINARY) && CPP_PEDANTIC (pfile))
cpp_error (pfile, CPP_DL_PEDWARN,
"imaginary constants are a GCC extension");