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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/c-cppbuiltin.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/c-cppbuiltin.c | 785 |
1 files changed, 785 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/c-cppbuiltin.c b/gcc-4.2.1-5666.3/gcc/c-cppbuiltin.c new file mode 100644 index 000000000..fa0143fd7 --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/c-cppbuiltin.c @@ -0,0 +1,785 @@ +/* Define builtin-in macros for the C family front ends. + Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 2, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "tree.h" +#include "version.h" +#include "flags.h" +#include "real.h" +#include "c-common.h" +#include "c-pragma.h" +#include "output.h" +#include "except.h" /* For USING_SJLJ_EXCEPTIONS. */ +#include "toplev.h" +#include "tm_p.h" /* Target prototypes. */ +#include "target.h" + +#ifndef TARGET_OS_CPP_BUILTINS +# define TARGET_OS_CPP_BUILTINS() +#endif + +#ifndef TARGET_OBJFMT_CPP_BUILTINS +# define TARGET_OBJFMT_CPP_BUILTINS() +#endif + +#ifndef REGISTER_PREFIX +#define REGISTER_PREFIX "" +#endif + +/* Non-static as some targets don't use it. */ +void builtin_define_std (const char *) ATTRIBUTE_UNUSED; +static void builtin_define_with_value_n (const char *, const char *, + size_t); +static void builtin_define_with_int_value (const char *, HOST_WIDE_INT); +static void builtin_define_with_hex_fp_value (const char *, tree, + int, const char *, + const char *, + const char *); +static void builtin_define_stdint_macros (void); +static void builtin_define_type_max (const char *, tree, int); +static void builtin_define_type_precision (const char *, tree); +static void builtin_define_float_constants (const char *, + const char *, + const char *, + tree); +static void define__GNUC__ (void); + +/* Define NAME with value TYPE precision. */ +static void +builtin_define_type_precision (const char *name, tree type) +{ + builtin_define_with_int_value (name, TYPE_PRECISION (type)); +} + +/* Define the float.h constants for TYPE using NAME_PREFIX, FP_SUFFIX, + and FP_CAST. */ +static void +builtin_define_float_constants (const char *name_prefix, + const char *fp_suffix, + const char *fp_cast, + tree type) +{ + /* Used to convert radix-based values to base 10 values in several cases. + + In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at + least 6 significant digits for correct results. Using the fraction + formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an + intermediate; perhaps someone can find a better approximation, in the + mean time, I suspect using doubles won't harm the bootstrap here. */ + + const double log10_2 = .30102999566398119521; + double log10_b; + const struct real_format *fmt; + + char name[64], buf[128]; + int dig, min_10_exp, max_10_exp; + int decimal_dig; + + fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); + gcc_assert (fmt->b != 10); + + /* The radix of the exponent representation. */ + if (type == float_type_node) + builtin_define_with_int_value ("__FLT_RADIX__", fmt->b); + log10_b = log10_2 * fmt->log2_b; + + /* The number of radix digits, p, in the floating-point significand. */ + sprintf (name, "__%s_MANT_DIG__", name_prefix); + builtin_define_with_int_value (name, fmt->p); + + /* The number of decimal digits, q, such that any floating-point number + with q decimal digits can be rounded into a floating-point number with + p radix b digits and back again without change to the q decimal digits, + + p log10 b if b is a power of 10 + floor((p - 1) log10 b) otherwise + */ + dig = (fmt->p - 1) * log10_b; + sprintf (name, "__%s_DIG__", name_prefix); + builtin_define_with_int_value (name, dig); + + /* The minimum negative int x such that b**(x-1) is a normalized float. */ + sprintf (name, "__%s_MIN_EXP__", name_prefix); + sprintf (buf, "(%d)", fmt->emin); + builtin_define_with_value (name, buf, 0); + + /* The minimum negative int x such that 10**x is a normalized float, + + ceil (log10 (b ** (emin - 1))) + = ceil (log10 (b) * (emin - 1)) + + Recall that emin is negative, so the integer truncation calculates + the ceiling, not the floor, in this case. */ + min_10_exp = (fmt->emin - 1) * log10_b; + sprintf (name, "__%s_MIN_10_EXP__", name_prefix); + sprintf (buf, "(%d)", min_10_exp); + builtin_define_with_value (name, buf, 0); + + /* The maximum int x such that b**(x-1) is a representable float. */ + sprintf (name, "__%s_MAX_EXP__", name_prefix); + builtin_define_with_int_value (name, fmt->emax); + + /* The maximum int x such that 10**x is in the range of representable + finite floating-point numbers, + + floor (log10((1 - b**-p) * b**emax)) + = floor (log10(1 - b**-p) + log10(b**emax)) + = floor (log10(1 - b**-p) + log10(b)*emax) + + The safest thing to do here is to just compute this number. But since + we don't link cc1 with libm, we cannot. We could implement log10 here + a series expansion, but that seems too much effort because: + + Note that the first term, for all extant p, is a number exceedingly close + to zero, but slightly negative. Note that the second term is an integer + scaling an irrational number, and that because of the floor we are only + interested in its integral portion. + + In order for the first term to have any effect on the integral portion + of the second term, the second term has to be exceedingly close to an + integer itself (e.g. 123.000000000001 or something). Getting a result + that close to an integer requires that the irrational multiplicand have + a long series of zeros in its expansion, which doesn't occur in the + first 20 digits or so of log10(b). + + Hand-waving aside, crunching all of the sets of constants above by hand + does not yield a case for which the first term is significant, which + in the end is all that matters. */ + max_10_exp = fmt->emax * log10_b; + sprintf (name, "__%s_MAX_10_EXP__", name_prefix); + builtin_define_with_int_value (name, max_10_exp); + + /* The number of decimal digits, n, such that any floating-point number + can be rounded to n decimal digits and back again without change to + the value. + + p * log10(b) if b is a power of 10 + ceil(1 + p * log10(b)) otherwise + + The only macro we care about is this number for the widest supported + floating type, but we want this value for rendering constants below. */ + { + double d_decimal_dig = 1 + fmt->p * log10_b; + decimal_dig = d_decimal_dig; + if (decimal_dig < d_decimal_dig) + decimal_dig++; + } + if (type == long_double_type_node) + builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig); + + /* Since, for the supported formats, B is always a power of 2, we + construct the following numbers directly as a hexadecimal + constants. */ + + /* The maximum representable finite floating-point number, + (1 - b**-p) * b**emax */ + { + int i, n; + char *p; + + strcpy (buf, "0x0."); + n = fmt->p * fmt->log2_b; + for (i = 0, p = buf + 4; i + 3 < n; i += 4) + *p++ = 'f'; + if (i < n) + *p++ = "08ce"[n - i]; + sprintf (p, "p%d", fmt->emax * fmt->log2_b); + if (fmt->pnan < fmt->p) + { + /* This is an IBM extended double format made up of two IEEE + doubles. The value of the long double is the sum of the + values of the two parts. The most significant part is + required to be the value of the long double rounded to the + nearest double. Rounding means we need a slightly smaller + value for LDBL_MAX. */ + buf[4 + fmt->pnan / 4] = "7bde"[fmt->pnan % 4]; + } + } + sprintf (name, "__%s_MAX__", name_prefix); + builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); + + /* The minimum normalized positive floating-point number, + b**(emin-1). */ + sprintf (name, "__%s_MIN__", name_prefix); + sprintf (buf, "0x1p%d", (fmt->emin - 1) * fmt->log2_b); + builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); + + /* The difference between 1 and the least value greater than 1 that is + representable in the given floating point type, b**(1-p). */ + sprintf (name, "__%s_EPSILON__", name_prefix); + if (fmt->pnan < fmt->p) + /* This is an IBM extended double format, so 1.0 + any double is + representable precisely. */ + sprintf (buf, "0x1p%d", (fmt->emin - fmt->p) * fmt->log2_b); + else + sprintf (buf, "0x1p%d", (1 - fmt->p) * fmt->log2_b); + builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); + + /* For C++ std::numeric_limits<T>::denorm_min. The minimum denormalized + positive floating-point number, b**(emin-p). Zero for formats that + don't support denormals. */ + sprintf (name, "__%s_DENORM_MIN__", name_prefix); + if (fmt->has_denorm) + { + sprintf (buf, "0x1p%d", (fmt->emin - fmt->p) * fmt->log2_b); + builtin_define_with_hex_fp_value (name, type, decimal_dig, + buf, fp_suffix, fp_cast); + } + else + { + sprintf (buf, "0.0%s", fp_suffix); + builtin_define_with_value (name, buf, 0); + } + + sprintf (name, "__%s_HAS_DENORM__", name_prefix); + builtin_define_with_value (name, fmt->has_denorm ? "1" : "0", 0); + + /* For C++ std::numeric_limits<T>::has_infinity. */ + sprintf (name, "__%s_HAS_INFINITY__", name_prefix); + builtin_define_with_int_value (name, + MODE_HAS_INFINITIES (TYPE_MODE (type))); + /* For C++ std::numeric_limits<T>::has_quiet_NaN. We do not have a + predicate to distinguish a target that has both quiet and + signalling NaNs from a target that has only quiet NaNs or only + signalling NaNs, so we assume that a target that has any kind of + NaN has quiet NaNs. */ + sprintf (name, "__%s_HAS_QUIET_NAN__", name_prefix); + builtin_define_with_int_value (name, MODE_HAS_NANS (TYPE_MODE (type))); +} + +/* Define __DECx__ constants for TYPE using NAME_PREFIX and SUFFIX. */ +static void +builtin_define_decimal_float_constants (const char *name_prefix, + const char *suffix, + tree type) +{ + const struct real_format *fmt; + char name[64], buf[128], *p; + int digits; + + fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); + + /* The number of radix digits, p, in the significand. */ + sprintf (name, "__%s_MANT_DIG__", name_prefix); + builtin_define_with_int_value (name, fmt->p); + + /* The minimum negative int x such that b**(x-1) is a normalized float. */ + sprintf (name, "__%s_MIN_EXP__", name_prefix); + sprintf (buf, "(%d)", fmt->emin); + builtin_define_with_value (name, buf, 0); + + /* The maximum int x such that b**(x-1) is a representable float. */ + sprintf (name, "__%s_MAX_EXP__", name_prefix); + builtin_define_with_int_value (name, fmt->emax); + + /* Compute the minimum representable value. */ + sprintf (name, "__%s_MIN__", name_prefix); + sprintf (buf, "1E%d%s", fmt->emin, suffix); + builtin_define_with_value (name, buf, 0); + + /* Compute the maximum representable value. */ + sprintf (name, "__%s_MAX__", name_prefix); + p = buf; + for (digits = fmt->p; digits; digits--) + { + *p++ = '9'; + if (digits == fmt->p) + *p++ = '.'; + } + *p = 0; + /* fmt->p plus 1, to account for the decimal point. */ + sprintf (&buf[fmt->p + 1], "E%d%s", fmt->emax, suffix); + builtin_define_with_value (name, buf, 0); + + /* Compute epsilon (the difference between 1 and least value greater + than 1 representable). */ + sprintf (name, "__%s_EPSILON__", name_prefix); + sprintf (buf, "1E-%d%s", fmt->p - 1, suffix); + builtin_define_with_value (name, buf, 0); + + /* Minimum denormalized postive decimal value. */ + sprintf (name, "__%s_DEN__", name_prefix); + p = buf; + for (digits = fmt->p; digits > 1; digits--) + { + *p++ = '0'; + if (digits == fmt->p) + *p++ = '.'; + } + *p = 0; + sprintf (&buf[fmt->p], "1E%d%s", fmt->emin, suffix); + builtin_define_with_value (name, buf, 0); +} + +/* Define __GNUC__, __GNUC_MINOR__ and __GNUC_PATCHLEVEL__. */ +static void +define__GNUC__ (void) +{ + /* The format of the version string, enforced below, is + ([^0-9]*-)?[0-9]+[.][0-9]+([.][0-9]+)?([- ].*)? */ + const char *q, *v = version_string; + + while (*v && !ISDIGIT (*v)) + v++; + gcc_assert (*v && (v <= version_string || v[-1] == '-')); + + q = v; + while (ISDIGIT (*v)) + v++; + builtin_define_with_value_n ("__GNUC__", q, v - q); + if (c_dialect_cxx ()) + builtin_define_with_value_n ("__GNUG__", q, v - q); + + gcc_assert (*v == '.' && ISDIGIT (v[1])); + + q = ++v; + while (ISDIGIT (*v)) + v++; + builtin_define_with_value_n ("__GNUC_MINOR__", q, v - q); + + if (*v == '.') + { + gcc_assert (ISDIGIT (v[1])); + q = ++v; + while (ISDIGIT (*v)) + v++; + builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", q, v - q); + } + else + builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", "0", 1); + + gcc_assert (!*v || *v == ' ' || *v == '-'); + + /* APPLE LOCAL begin Apple version */ + { + /* This chunk of code defines __APPLE_CC__ from the version + string. It expects to see a substring of the version string of + the form "build NNNN)", where each N is a digit, and the first + N is nonzero (there can be 4 or 5 digits). It will abort() if + these conditions are not met, since that usually means that + someone's broken the version string. */ + const char *vt; + + vt = strstr (version_string, "build "); + if (vt == NULL) + abort (); + vt += strlen ("build "); + if (! ISDIGIT (*vt)) + abort (); + for (q = vt; *q != 0 && ISDIGIT (*q); q++) + ; + if (q == vt || *q != ')') + abort (); + if ((q - vt != 4 && q - vt != 5) || *vt == '0') + abort (); + builtin_define_with_value_n ("__APPLE_CC__", vt, q - vt); + } + /* APPLE LOCAL end Apple version */ +} + +/* Define macros used by <stdint.h>. Currently only defines limits + for intmax_t, used by the testsuite. */ +static void +builtin_define_stdint_macros (void) +{ + int intmax_long; + if (intmax_type_node == long_long_integer_type_node) + intmax_long = 2; + else if (intmax_type_node == long_integer_type_node) + intmax_long = 1; + else if (intmax_type_node == integer_type_node) + intmax_long = 0; + else + gcc_unreachable (); + builtin_define_type_max ("__INTMAX_MAX__", intmax_type_node, intmax_long); +} + +/* Hook that registers front end and target-specific built-ins. */ +void +c_cpp_builtins (cpp_reader *pfile) +{ + /* -undef turns off target-specific built-ins. */ + if (flag_undef) + return; + + define__GNUC__ (); + + /* For stddef.h. They require macros defined in c-common.c. */ + c_stddef_cpp_builtins (); + + if (c_dialect_cxx ()) + { + if (flag_weak && SUPPORTS_ONE_ONLY) + cpp_define (pfile, "__GXX_WEAK__=1"); + else + cpp_define (pfile, "__GXX_WEAK__=0"); + if (warn_deprecated) + cpp_define (pfile, "__DEPRECATED"); + } + /* Note that we define this for C as well, so that we know if + __attribute__((cleanup)) will interface with EH. */ + if (flag_exceptions) + cpp_define (pfile, "__EXCEPTIONS"); + + /* Represents the C++ ABI version, always defined so it can be used while + preprocessing C and assembler. */ + if (flag_abi_version == 0) + /* Use a very large value so that: + + #if __GXX_ABI_VERSION >= <value for version X> + + will work whether the user explicitly says "-fabi-version=x" or + "-fabi-version=0". Do not use INT_MAX because that will be + different from system to system. */ + builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999); + else if (flag_abi_version == 1) + /* Due to a historical accident, this version had the value + "102". */ + builtin_define_with_int_value ("__GXX_ABI_VERSION", 102); + else + /* Newer versions have values 1002, 1003, .... */ + builtin_define_with_int_value ("__GXX_ABI_VERSION", + 1000 + flag_abi_version); + + /* libgcc needs to know this. */ + if (USING_SJLJ_EXCEPTIONS) + cpp_define (pfile, "__USING_SJLJ_EXCEPTIONS__"); + + /* limits.h needs to know these. */ + builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node, 0); + builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node, 0); + builtin_define_type_max ("__INT_MAX__", integer_type_node, 0); + builtin_define_type_max ("__LONG_MAX__", long_integer_type_node, 1); + builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node, 2); + builtin_define_type_max ("__WCHAR_MAX__", wchar_type_node, 0); + + builtin_define_type_precision ("__CHAR_BIT__", char_type_node); + + /* stdint.h (eventually) and the testsuite need to know these. */ + builtin_define_stdint_macros (); + + /* float.h needs to know these. */ + + builtin_define_with_int_value ("__FLT_EVAL_METHOD__", + TARGET_FLT_EVAL_METHOD); + + /* And decfloat.h needs this. */ + builtin_define_with_int_value ("__DEC_EVAL_METHOD__", + TARGET_DEC_EVAL_METHOD); + + builtin_define_float_constants ("FLT", "F", "%s", float_type_node); + /* Cast the double precision constants when single precision constants are + specified. The correct result is computed by the compiler when using + macros that include a cast. This has the side-effect of making the value + unusable in const expressions. */ + if (flag_single_precision_constant) + builtin_define_float_constants ("DBL", "L", "((double)%s)", double_type_node); + else + builtin_define_float_constants ("DBL", "", "%s", double_type_node); + builtin_define_float_constants ("LDBL", "L", "%s", long_double_type_node); + + /* For decfloat.h. */ + builtin_define_decimal_float_constants ("DEC32", "DF", dfloat32_type_node); + builtin_define_decimal_float_constants ("DEC64", "DD", dfloat64_type_node); + builtin_define_decimal_float_constants ("DEC128", "DL", dfloat128_type_node); + + /* For use in assembly language. */ + builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0); + builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0); + + /* Misc. */ + builtin_define_with_value ("__VERSION__", version_string, 1); + + /* APPLE LOCAL begin mainline */ + if (flag_gnu89_inline) + cpp_define (pfile, "__GNUC_GNU_INLINE__"); + else + cpp_define (pfile, "__GNUC_STDC_INLINE__"); + /* APPLE LOCAL end mainline */ + + /* Definitions for LP64 model. */ + if (TYPE_PRECISION (long_integer_type_node) == 64 + && POINTER_SIZE == 64 + && TYPE_PRECISION (integer_type_node) == 32) + { + cpp_define (pfile, "_LP64"); + cpp_define (pfile, "__LP64__"); + } + + /* Other target-independent built-ins determined by command-line + options. */ + /* APPLE LOCAL begin blocks */ + /* APPLE LOCAL radar 5868913 */ + if (flag_blocks) + cpp_define (pfile, "__BLOCKS__=1"); + /* APPLE LOCAL end blocks */ + if (optimize_size) + cpp_define (pfile, "__OPTIMIZE_SIZE__"); + if (optimize) + cpp_define (pfile, "__OPTIMIZE__"); + + if (fast_math_flags_set_p ()) + cpp_define (pfile, "__FAST_MATH__"); + if (flag_really_no_inline) + cpp_define (pfile, "__NO_INLINE__"); + if (flag_signaling_nans) + cpp_define (pfile, "__SUPPORT_SNAN__"); + if (flag_finite_math_only) + cpp_define (pfile, "__FINITE_MATH_ONLY__=1"); + else + cpp_define (pfile, "__FINITE_MATH_ONLY__=0"); + if (flag_pic) + { + builtin_define_with_int_value ("__pic__", flag_pic); + builtin_define_with_int_value ("__PIC__", flag_pic); + } + + if (flag_iso) + cpp_define (pfile, "__STRICT_ANSI__"); + + if (!flag_signed_char) + cpp_define (pfile, "__CHAR_UNSIGNED__"); + + if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node)) + cpp_define (pfile, "__WCHAR_UNSIGNED__"); + + /* Make the choice of ObjC runtime visible to source code. */ + if (c_dialect_objc () && flag_next_runtime) + cpp_define (pfile, "__NEXT_RUNTIME__"); + + /* Show the availability of some target pragmas. */ + if (flag_mudflap || targetm.handle_pragma_redefine_extname) + cpp_define (pfile, "__PRAGMA_REDEFINE_EXTNAME"); + + if (targetm.handle_pragma_extern_prefix) + cpp_define (pfile, "__PRAGMA_EXTERN_PREFIX"); + + /* Make the choice of the stack protector runtime visible to source code. + The macro names and values here were chosen for compatibility with an + earlier implementation, i.e. ProPolice. */ + if (flag_stack_protect == 2) + cpp_define (pfile, "__SSP_ALL__=2"); + else if (flag_stack_protect == 1) + cpp_define (pfile, "__SSP__=1"); + + if (flag_openmp) + cpp_define (pfile, "_OPENMP=200505"); + + /* A straightforward target hook doesn't work, because of problems + linking that hook's body when part of non-C front ends. */ +# define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM) +# define preprocessing_trad_p() (cpp_get_options (pfile)->traditional) +# define builtin_define(TXT) cpp_define (pfile, TXT) +# define builtin_assert(TXT) cpp_assert (pfile, TXT) + TARGET_CPU_CPP_BUILTINS (); + TARGET_OS_CPP_BUILTINS (); + TARGET_OBJFMT_CPP_BUILTINS (); + + /* Support the __declspec keyword by turning them into attributes. + Note that the current way we do this may result in a collision + with predefined attributes later on. This can be solved by using + one attribute, say __declspec__, and passing args to it. The + problem with that approach is that args are not accumulated: each + new appearance would clobber any existing args. */ + if (TARGET_DECLSPEC) + builtin_define ("__declspec(x)=__attribute__((x))"); +} + +/* Pass an object-like macro. If it doesn't lie in the user's + namespace, defines it unconditionally. Otherwise define a version + with two leading underscores, and another version with two leading + and trailing underscores, and define the original only if an ISO + standard was not nominated. + + e.g. passing "unix" defines "__unix", "__unix__" and possibly + "unix". Passing "_mips" defines "__mips", "__mips__" and possibly + "_mips". */ +void +builtin_define_std (const char *macro) +{ + size_t len = strlen (macro); + char *buff = (char *) alloca (len + 5); + char *p = buff + 2; + char *q = p + len; + + /* prepend __ (or maybe just _) if in user's namespace. */ + memcpy (p, macro, len + 1); + if (!( *p == '_' && (p[1] == '_' || ISUPPER (p[1])))) + { + if (*p != '_') + *--p = '_'; + if (p[1] != '_') + *--p = '_'; + } + cpp_define (parse_in, p); + + /* If it was in user's namespace... */ + if (p != buff + 2) + { + /* Define the macro with leading and following __. */ + if (q[-1] != '_') + *q++ = '_'; + if (q[-2] != '_') + *q++ = '_'; + *q = '\0'; + cpp_define (parse_in, p); + + /* Finally, define the original macro if permitted. */ + if (!flag_iso) + cpp_define (parse_in, macro); + } +} + +/* Pass an object-like macro and a value to define it to. The third + parameter says whether or not to turn the value into a string + constant. */ +void +builtin_define_with_value (const char *macro, const char *expansion, int is_str) +{ + char *buf; + size_t mlen = strlen (macro); + size_t elen = strlen (expansion); + size_t extra = 2; /* space for an = and a NUL */ + + if (is_str) + extra += 2; /* space for two quote marks */ + + buf = (char *) alloca (mlen + elen + extra); + if (is_str) + sprintf (buf, "%s=\"%s\"", macro, expansion); + else + sprintf (buf, "%s=%s", macro, expansion); + + cpp_define (parse_in, buf); +} + +/* Pass an object-like macro and a value to define it to. The third + parameter is the length of the expansion. */ +static void +builtin_define_with_value_n (const char *macro, const char *expansion, size_t elen) +{ + char *buf; + size_t mlen = strlen (macro); + + /* Space for an = and a NUL. */ + buf = (char *) alloca (mlen + elen + 2); + memcpy (buf, macro, mlen); + buf[mlen] = '='; + memcpy (buf + mlen + 1, expansion, elen); + buf[mlen + elen + 1] = '\0'; + + cpp_define (parse_in, buf); +} + +/* Pass an object-like macro and an integer value to define it to. */ +static void +builtin_define_with_int_value (const char *macro, HOST_WIDE_INT value) +{ + char *buf; + size_t mlen = strlen (macro); + size_t vlen = 18; + size_t extra = 2; /* space for = and NUL. */ + + buf = (char *) alloca (mlen + vlen + extra); + memcpy (buf, macro, mlen); + buf[mlen] = '='; + sprintf (buf + mlen + 1, HOST_WIDE_INT_PRINT_DEC, value); + + cpp_define (parse_in, buf); +} + +/* Pass an object-like macro a hexadecimal floating-point value. */ +static void +builtin_define_with_hex_fp_value (const char *macro, + tree type ATTRIBUTE_UNUSED, int digits, + const char *hex_str, + const char *fp_suffix, + const char *fp_cast) +{ + REAL_VALUE_TYPE real; + char dec_str[64], buf1[256], buf2[256]; + + /* Hex values are really cool and convenient, except that they're + not supported in strict ISO C90 mode. First, the "p-" sequence + is not valid as part of a preprocessor number. Second, we get a + pedwarn from the preprocessor, which has no context, so we can't + suppress the warning with __extension__. + + So instead what we do is construct the number in hex (because + it's easy to get the exact correct value), parse it as a real, + then print it back out as decimal. */ + + real_from_string (&real, hex_str); + real_to_decimal (dec_str, &real, sizeof (dec_str), digits, 0); + + /* Assemble the macro in the following fashion + macro = fp_cast [dec_str fp_suffix] */ + sprintf (buf1, "%s%s", dec_str, fp_suffix); + sprintf (buf2, fp_cast, buf1); + sprintf (buf1, "%s=%s", macro, buf2); + + cpp_define (parse_in, buf1); +} + +/* Define MAX for TYPE based on the precision of the type. IS_LONG is + 1 for type "long" and 2 for "long long". We have to handle + unsigned types, since wchar_t might be unsigned. */ + +static void +builtin_define_type_max (const char *macro, tree type, int is_long) +{ + static const char *const values[] + = { "127", "255", + "32767", "65535", + "2147483647", "4294967295", + "9223372036854775807", "18446744073709551615", + "170141183460469231731687303715884105727", + "340282366920938463463374607431768211455" }; + static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL" }; + + const char *value, *suffix; + char *buf; + size_t idx; + + /* Pre-rendering the values mean we don't have to futz with printing a + multi-word decimal value. There are also a very limited number of + precisions that we support, so it's really a waste of time. */ + switch (TYPE_PRECISION (type)) + { + case 8: idx = 0; break; + case 16: idx = 2; break; + case 32: idx = 4; break; + case 64: idx = 6; break; + case 128: idx = 8; break; + default: gcc_unreachable (); + } + + value = values[idx + TYPE_UNSIGNED (type)]; + suffix = suffixes[is_long * 2 + TYPE_UNSIGNED (type)]; + + buf = (char *) alloca (strlen (macro) + 1 + strlen (value) + + strlen (suffix) + 1); + sprintf (buf, "%s=%s%s", macro, value, suffix); + + cpp_define (parse_in, buf); +} |