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authorJames Youngman <jay@gnu.org>2008-08-02 21:49:46 +0100
committerJim Meyering <meyering@redhat.com>2008-08-06 08:47:55 +0200
commitf65cafd67b33009d23f940968bbe7f9a08d6fe13 (patch)
tree46b81ec96bceed2c2b7b6dffa3aa4e8646db952e /AUTHORS
parentd9207b48a3e0763a7a93eb17c26ae5704b798d76 (diff)
downloadcoreutils-f65cafd67b33009d23f940968bbe7f9a08d6fe13.tar.xz
expr: support arbitrary-precision arithmetic
* src/Makefile.am (expr_LDADD): Link expr against GNU MP. * doc/coreutils.texi (expr invocation): Describe --bignum, --no-bignum. Explain the new arbitrary-precision functionality. * NEWS: Indicate that arbitrary-precision arithmetic is now supported in expr. * src/expr.c (enum valtype): Added mp_integer, signifying a GNU MP number. (usage): Document the new options --bignum and --no-bignum which force and prohibit the use of arbitrary-precision arithmetic, respectively. (long_options): data structure for getopt_long, which we need to use to parse the options mentioned above. (main): parse these options with getopt_long instead of parse_long_options. (valinfo): Downgrade the numeric member of the union from intmax_t to signed long, since MP lacks functions for promoting an intmax_t to an arbitrary-precision quantity. (enum arithmetic_mode): Represents the current choice between --bignum, --no-bignum and the default (automatically switch from one to the other if needed). (integer_overflow): issue a more explicit error message indicating that MP is not available. (string_too_long): new function, emits a fatal error message for the case where an argument to the 'index' expression is too long for a string offset to be represented. (int_value): With --bignum, create the value as mp_integer rather than plain integer. (substr_value): factored out of eval6; implements "substr". (freev): also destroy mp_integer values. Check that no mp_integer values exist if --no-bignum was specified. (printv, null, tostring): support mp_integer. (toint): new funtion for converting from string or mp_integer to integer. (getsize): extracts a size_t value from a VALUE object; used to implement substr. (promote): promotes a value from integer to mp_integer. (domult, dodivide): functions for multiplication and division, factored out of eval4. (doadd): addition/subraction function, factpred out of eval3. (eval3): support mp_integer types; call doadd. (eval4): support mp_integer types; call domult, dodivide. (eval6): support mp_integer offsets and lengths for "substr" and "index". * TODO: Mention that expr supports arbitrary-precision arithmetic, and suggest that this might also be a good idea for seq. * AUTHORS (expr): Add James Youngman.
Diffstat (limited to 'AUTHORS')
-rw-r--r--AUTHORS2
1 files changed, 1 insertions, 1 deletions
diff --git a/AUTHORS b/AUTHORS
index eab9bec17..9c3d990d6 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -25,7 +25,7 @@ du: Torbjörn Granlund, David MacKenzie, Paul Eggert, Jim Meyering
echo: Brian Fox, Chet Ramey
env: Richard Mlynarik, David MacKenzie
expand: David MacKenzie
-expr: Mike Parker
+expr: Mike Parker, James Youngman
factor: Paul Rubin
false: Jim Meyering
fmt: Ross Paterson