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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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2
errtbl.h
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@@ -100,7 +100,7 @@ E_FUNC bool is_errnum_in_error_table(int errnum);
E_FUNC int e_digits_2_errnum(CONST char *errsym);
E_FUNC bool is_e_1string(CONST char *errsym);
E_FUNC bool is_e_2string(CONST char *errsym);
E_FUNC struct errtbl *find_estring_in_errtbl(CONST char *errsym, CONST struct errtbl *tbl);
E_FUNC struct errtbl *find_errsym_in_errtbl(CONST char *errsym, CONST struct errtbl *tbl);
E_FUNC struct errtbl *find_errnum_in_errtbl(int errnum, CONST struct errtbl *tbl);
E_FUNC CONST struct errtbl *lookup_errnum_in_error_table(int errnum);
E_FUNC void verify_error_table(void);