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Landon Curt Noll
102
help/error
102
help/error
@@ -5,63 +5,63 @@ SYNOPSIS
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error([errnum | "E_STRING"])
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TYPES
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errnum integer, defaults to errno()
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E_STRING string
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errnum integer, defaults to errno()
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E_STRING string
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return null value or error value
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return null value or error value
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DESCRIPTION
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If errnum == 0:
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error(errnum) returns the null value.
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error(errnum) returns the null value.
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The "global calc_errno value" is set to 0.
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The "global calc_errno value" is set to 0.
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The global calc error count is not changed.
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The global calc error count is not changed.
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With error(errnum) numeric argument:
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For 0 < errnum <= 32767:
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For 0 < errnum <= 32767:
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error(errnum) returns a value that is of a special type called
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"error". The "error" return value, when given to iserror()
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will cause that function to return a true value that happens
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to match the "global calc_errno value".
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error(errnum) returns a value that is of a special type called
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"error". The "error" return value, when given to iserror()
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will cause that function to return a true value that happens
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to match the "global calc_errno value".
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The "global calc_errno value" is then set to errnum.
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The "global calc_errno value" is then set to errnum.
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For all other errnum values:
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For all other errnum values:
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An error error condition is raised about the valid errnum.
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An error error condition is raised about the valid errnum.
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The global calc error count (see help errcount) is incremented.
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If the global calc error count exceeds the maximum count
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(see help errmax), any ongoing calc execution is aborted.
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The global calc error count (see help errcount) is incremented.
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If the global calc error count exceeds the maximum count
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(see help errmax), any ongoing calc execution is aborted.
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With error("E_STRING") string argument:
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If E_STRING is a valid errsym code, then the E_STRING errsym
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is converted into an equivalent errnum and respective calc
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error condition is raised.
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If E_STRING is a valid errsym code, then the E_STRING errsym
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is converted into an equivalent errnum and respective calc
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error condition is raised.
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If E_STRING is not a valid errsym code, an error error condition
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is raised about the invalid E_STRING.
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If E_STRING is not a valid errsym code, an error error condition
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is raised about the invalid E_STRING.
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For example, these two calls are equivalent:
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For example, these two calls are equivalent:
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error(10003); /* error 10003 has a E_STRING of "E_ADD" */
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error("E_ADD"); /* error 10003 has a E_STRING of "E_ADD" */
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error(10003); /* error 10003 has a E_STRING of "E_ADD" */
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error("E_ADD"); /* error 10003 has a E_STRING of "E_ADD" */
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See help errsym for information on E_STRING errsym codes.
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See help errsym for information on E_STRING errsym codes.
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For a list of the E_STRING associated with calc computation error
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codes, see help errorcodes.
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For a list of the E_STRING associated with calc computation error
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codes, see help errorcodes.
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For no errnum arg:
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Calling error() without an argument will return the current
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"global calc_errno value" AND will also increment the
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global calc error count.
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Calling error() without an argument will return the current
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"global calc_errno value" AND will also increment the
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global calc error count.
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All other values of errnum are reserved for future use and currently
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will generate an error.
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@@ -81,23 +81,23 @@ DESCRIPTION
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By convention, the "global calc_errno value" has the following ranges:
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errnum < 0 Reserved for future use
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errnum == 0 calc_errno cleared: libc errno codes above here
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1 <= errnum <= 9999 system error and libc errno codes
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errnum == 10000 Reserved for "No error" calc internal state
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10001 <= errnum <= E__HIGHEST calc computation error codes
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E__HIGHEST < errnum < 20000 Reserved for future calc error codes
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20000 < errnum <= 32767 User defined error codes start here
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errnum >= 32768 Reserved for future use
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errnum < 0 Reserved for future use
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errnum == 0 calc_errno cleared: libc errno codes above here
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1 <= errnum <= 9999 system error and libc errno codes
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errnum == 10000 Reserved for "No error" calc internal state
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10001 <= errnum <= E__HIGHEST calc computation error codes
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E__HIGHEST < errnum < 20000 Reserved for future calc error codes
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20000 < errnum <= 32767 User defined error codes start here
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errnum >= 32768 Reserved for future use
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The following constants are part of the calc error code mechanism:
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E__BASE == 10000 1 less than the 1st calc computation error code
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E__HIGHEST highest assigned calc computation error code
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E__USERDEF == 20000 user defined error codes start here
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E__USERMAX == 32767 maximum user defined error code
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E__BASE == 10000 1 less than the 1st calc computation error code
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E__HIGHEST highest assigned calc computation error code
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E__USERDEF == 20000 user defined error codes start here
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E__USERMAX == 32767 maximum user defined error code
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ECOUNT number of calc computation error codes (not including E__BASE)
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ECOUNT number of calc computation error codes (not including E__BASE)
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See help errorcodes for the actual values of the above constants.
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@@ -134,9 +134,9 @@ LIMITS
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E_STRING is string that must match the regular expression: ^E_[A-Z0-9_]+$
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LINK LIBRARY
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int calc_errno; /* global calc_errno value */
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int calc_errno; /* global calc_errno value */
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CONST struct errtbl error_table[ECOUNT+2]; /* calc error codes, error symbols and error messages */
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CONST struct errtbl error_table[ECOUNT+2]; /* calc error codes, error symbols and error messages */
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bool is_e_digits(CONST char *errsym);
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bool is_valid_errnum(int errnum);
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@@ -163,7 +163,7 @@ SEE ALSO
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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@@ -171,8 +171,8 @@ SEE ALSO
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 1995/12/18 03:30:59
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## File existed as early as: 1995
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## Under source code control: 1995/12/18 03:30:59
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## File existed as early as: 1995
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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