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add errsym builtin function

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NOTE: errstr was renamed to errsym.

Added errsym builtin function.  The errsym(errnum | "E_STRING")
builtin, , when given a valid integer errnum that corresponds to a
calc error condition, will return an E_STRING string, AND when given
a valid E_STRING string that is associated with a calc error
condition, will return errnum integer that corresponds to a calc
error condition.

Supplying a non-integer numeric errnum code to error(), errno(),
strerror(), or errsym() will result in an error.
This commit is contained in:
Landon Curt Noll
2023-09-20 22:22:49 -07:00
parent 120527d375
commit 1a898caf3f
16 changed files with 366 additions and 55 deletions
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15
help/error
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@@ -52,7 +52,7 @@ DESCRIPTION
error(10003); /* error 10003 has a E_STRING of "E_ADD" */
error("E_ADD"); /* error 10003 has a E_STRING of "E_ADD" */
See help errstr for information on E_STRING errsym codes.
See help errsym for information on E_STRING errsym codes.
For a list of the E_STRING associated with calc computation error
codes, see help errorcodes.
@@ -138,6 +138,19 @@ LINK LIBRARY
CONST struct errtbl error_table[ECOUNT+2]; /* calc error codes, error symbols and error messages */
bool is_e_digits(CONST char *errsym);
bool is_valid_errnum(int errnum);
bool is_errnum_in_error_table(int errnum);
bool is_e_1string(CONST char *errsym);
bool is_e_2string(CONST char *errsym);
struct errtbl *find_errsym_in_errtbl(CONST char *errsym, CONST struct errtbl *tbl);
struct errtbl *find_errnum_in_errtbl(int errnum, CONST struct errtbl *tbl);
CONST struct errtbl *lookup_errnum_in_error_table(int errnum);
int errsym_2_errnum(CONST char *errsym);
char *errnum_2_errsym(int errnum, bool *palloced);
char *errnum_2_errmsg(int errnum, bool *palloced);
char *errsym_2_errmsg(CONST char *errsym, bool *palloced);
SEE ALSO
errcount, errmax, errorcodes, iserror, errno, strerror, newerror,
stoponerror