/**
* \file enumeration.c
*
* Handle options with enumeration names and bit mask bit names
* for their arguments.
*
* @addtogroup autoopts
* @{
*/
/*
* This routine will run run-on options through a pager so the
* user may examine, print or edit them at their leisure.
*
* This file is part of AutoOpts, a companion to AutoGen.
* AutoOpts is free software.
* AutoOpts is Copyright (C) 1992-2018 by Bruce Korb - all rights reserved
*
* AutoOpts is available under any one of two licenses. The license
* in use must be one of these two and the choice is under the control
* of the user of the license.
*
* The GNU Lesser General Public License, version 3 or later
* See the files "COPYING.lgplv3" and "COPYING.gplv3"
*
* The Modified Berkeley Software Distribution License
* See the file "COPYING.mbsd"
*
* These files have the following sha256 sums:
*
* 8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95 COPYING.gplv3
* 4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b COPYING.lgplv3
* 13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239 COPYING.mbsd
*/
/*
* A real "pOpts" pointer means someone messed up. Give a real error.
*/
if (pOpts > OPTPROC_EMIT_LIMIT)
fprintf(option_usage_fp, pz_enum_err_fmt, pOpts->pzProgName,
pOD->optArg.argString, pOD->pz_Name);
/*
* If the first name starts with this funny character, then we have
* a first value with an unspellable name. You cannot specify it.
* So, we don't list it either.
*/
if (**paz_names == 0x7F) {
paz_names++;
hidden = 1;
ct_down = --name_ct;
}
/*
* Figure out the maximum length of any name, plus the total length
* of all the names.
*/
{
char const * const * paz = paz_names;
do {
size_t len = strlen(*(paz++)) + 1;
if (len > max_len)
max_len = len;
ttl_len += len;
} while (--ct_down > 0);
ct_down = name_ct;
}
/*
* IF any one entry is about 1/2 line or longer, print one per line
*/
if (max_len > 35) {
do {
fprintf(option_usage_fp, ENUM_ERR_LINE, *(paz_names++));
} while (--ct_down > 0);
}
/*
* ELSE IF they all fit on one line, then do so.
*/
else if (ttl_len < 76) {
fputc(' ', option_usage_fp);
do {
fputc(' ', option_usage_fp);
fputs(*(paz_names++), option_usage_fp);
} while (--ct_down > 0);
fputc(NL, option_usage_fp);
}
/*
* Otherwise, columnize the output
*/
else {
unsigned int ent_no = 0;
char fmt[16]; /* format for all-but-last entries on a line */
if (snprintf(fmt, 16, ENUM_ERR_WIDTH, (int)max_len) >= 16)
option_exits(EXIT_FAILURE);
max_len = 78 / max_len; /* max_len is now max entries on a line */
fputs(TWO_SPACES_STR, option_usage_fp);
/*
* Loop through all but the last entry
*/
ct_down = name_ct;
while (--ct_down > 0) {
if (++ent_no == max_len) {
/*
* Last entry on a line. Start next line, too.
*/
fprintf(option_usage_fp, NLSTR_SPACE_FMT, *(paz_names++));
ent_no = 0;
}
/**
* Convert a name or number into a binary number.
* "~0" and "-1" will be converted to the largest value in the enumeration.
*
* @param name the keyword name (number) to convert
* @param pOpts the program's option descriptor
* @param pOD the option descriptor for this option
* @param paz_names the list of keywords for this option
* @param name_ct the count of keywords
*/
static uintptr_t
find_name(char const * name, tOptions * pOpts, tOptDesc * pOD,
char const * const * paz_names, unsigned int name_ct)
{
/*
* Return the matching index as a pointer sized integer.
* The result gets stashed in a char * pointer.
*/
uintptr_t res = name_ct;
size_t len = strlen(name);
uintptr_t idx;
if (IS_DEC_DIGIT_CHAR(*name)) {
char * pz = VOIDP(name);
unsigned long val = strtoul(pz, &pz, 0);
if ((*pz == NUL) && (val < name_ct))
return (uintptr_t)val;
pz_enum_err_fmt = znum_too_large;
option_usage_fp = stderr;
enum_err(pOpts, pOD, paz_names, (int)name_ct);
return name_ct;
}
/*
* Look for an exact match, but remember any partial matches.
* Multiple partial matches means we have an ambiguous match.
*/
for (idx = 0; idx < name_ct; idx++) {
if (strncmp(paz_names[idx], name, len) == 0) {
if (paz_names[idx][len] == NUL)
return idx; /* full match */
if (res == name_ct)
res = idx; /* save partial match */
else
res = (uintptr_t)~0; /* may yet find full match */
}
}
if (res < name_ct)
return res; /* partial match */
/*=export_func optionEnumerationVal
* what: Convert from a string to an enumeration value
* private:
*
* arg: tOptions *, pOpts, the program options descriptor
* arg: tOptDesc *, pOD, enumeration option description
* arg: char const * const *, paz_names, list of enumeration names
* arg: unsigned int, name_ct, number of names in list
*
* ret_type: uintptr_t
* ret_desc: the enumeration value
*
* doc: This converts the optArg.argString string from the option description
* into the index corresponding to an entry in the name list.
* This will match the generated enumeration value.
* Full matches are always accepted. Partial matches are accepted
* if there is only one partial match.
=*/
uintptr_t
optionEnumerationVal(tOptions * pOpts, tOptDesc * pOD,
char const * const * paz_names, unsigned int name_ct)
{
uintptr_t res = 0UL;
/*
* IF the program option descriptor pointer is invalid,
* then it is some sort of special request.
*/
switch ((uintptr_t)pOpts) {
case (uintptr_t)OPTPROC_EMIT_USAGE:
/*
* print the list of enumeration names.
*/
enum_err(pOpts, pOD, paz_names, (int)name_ct);
break;
case (uintptr_t)OPTPROC_EMIT_SHELL:
{
unsigned int ix = (unsigned int)pOD->optArg.argEnum;
/*
* print the name string.
*/
if (ix >= name_ct)
printf(INVALID_FMT, ix);
else
fputs(paz_names[ ix ], stdout);
break;
}
case (uintptr_t)OPTPROC_RETURN_VALNAME:
{
unsigned int ix = (unsigned int)pOD->optArg.argEnum;
/*
* Replace the enumeration value with the name string.
*/
if (ix >= name_ct)
return (uintptr_t)INVALID_STR;
pOD->optArg.argString = paz_names[ix];
break;
}
default:
if ((pOD->fOptState & OPTST_RESET) != 0)
break;
res = find_name(pOD->optArg.argString, pOpts, pOD, paz_names, name_ct);
/*
* Replace the enumeration value with the name string.
* First, determine the needed length, then allocate and fill in.
*/
while (bits != 0) {
if (bits & 1)
len += strlen(nm_list[ix]) + PLUS_STR_LEN + 1;
if (++ix >= nm_ct) break;
bits >>= 1;
}
/**
* Check membership start conditions. An equal character (@samp{=}) says to
* clear the result and not carry over any residual value. A carat
* (@samp{^}), which may follow the equal character, says to invert the
* result. The scanning pointer is advanced past these characters and any
* leading white space. Invalid sequences are indicated by setting the
* scanning pointer to NULL.
*
* @param od the set membership option description
* @param argp a pointer to the string scanning pointer
* @param invert a pointer to the boolean inversion indicator
*
* @returns either zero or the original value for the optCookie.
*/
static uintptr_t
check_membership_start(tOptDesc * od, char const ** argp, bool * invert)
{
uintptr_t res = (uintptr_t)od->optCookie;
char const * arg = SPN_WHITESPACE_CHARS(od->optArg.argString);
if ((arg == NULL) || (*arg == NUL))
goto member_start_fail;
*invert = false;
switch (*arg) {
case '=':
res = 0UL;
arg = SPN_WHITESPACE_CHARS(arg + 1);
switch (*arg) {
case '=': case ',':
goto member_start_fail;
case '^':
goto inversion;
default:
break;
}
break;
case '^':
inversion:
*invert = true;
arg = SPN_WHITESPACE_CHARS(arg + 1);
if (*arg != ',')
break;
/* FALLTHROUGH */
case ',':
goto member_start_fail;
default:
break;
}
*argp = arg;
return res;
member_start_fail:
*argp = NULL;
return 0UL;
}
/**
* convert a name to a bit. Look up a name string to get a bit number
* and shift the value "1" left that number of bits.
*
* @param opts program options descriptor
* @param od the set membership option description
* @param pz address of the start of the bit name
* @param nm_list the list of names for this option
* @param nm_ct the number of entries in this list
*
* @returns 0UL on error, other an unsigned long with the correct bit set.
*/
static uintptr_t
find_member_bit(tOptions * opts, tOptDesc * od, char const * pz, int len,
char const * const * nm_list, unsigned int nm_ct)
{
char nm_buf[ AO_NAME_SIZE ];
memcpy(nm_buf, pz, len);
nm_buf[len] = NUL;
{
unsigned int shift_ct = (unsigned int)
find_name(nm_buf, opts, od, nm_list, nm_ct);
if (shift_ct >= nm_ct)
return 0UL;
return 1UL << shift_ct;
}
}
/*=export_func optionMemberList
* what: Get the list of members of a bit mask set
*
* arg: tOptDesc *, od, the set membership option description
*
* ret_type: char *
* ret_desc: the names of the set bits
*
* doc: This converts the OPT_VALUE_name mask value to a allocated string.
* It is the caller's responsibility to free the string.
=*/
char *
optionMemberList(tOptDesc * od)
{
uintptr_t sv = od->optArg.argIntptr;
char * res;
(*(od->pOptProc))(OPTPROC_RETURN_VALNAME, od);
res = VOIDP(od->optArg.argString);
od->optArg.argIntptr = sv;
return res;
}
/*=export_func optionSetMembers
* what: Convert between bit flag values and strings
* private:
*
* arg: tOptions *, opts, the program options descriptor
* arg: tOptDesc *, od, the set membership option description
* arg: char const * const *,
* nm_list, list of enumeration names
* arg: unsigned int, nm_ct, number of names in list
*
* doc: This converts the optArg.argString string from the option description
* into the index corresponding to an entry in the name list.
* This will match the generated enumeration value.
* Full matches are always accepted. Partial matches are accepted
* if there is only one partial match.
=*/
void
optionSetMembers(tOptions * opts, tOptDesc * od,
char const * const * nm_list, unsigned int nm_ct)
{
/*
* IF the program option descriptor pointer is invalid,
* then it is some sort of special request.
*/
switch ((uintptr_t)opts) {
case (uintptr_t)OPTPROC_EMIT_USAGE:
enum_err(OPTPROC_EMIT_USAGE, od, nm_list, nm_ct);
return;
case (uintptr_t)OPTPROC_EMIT_SHELL:
set_memb_shell(opts, od, nm_list, nm_ct);
return;
case (uintptr_t)OPTPROC_RETURN_VALNAME:
set_memb_names(opts, od, nm_list, nm_ct);
return;
default:
break;
}
if ((od->fOptState & OPTST_RESET) != 0)
return;
{
char const * arg;
bool invert;
uintptr_t res = check_membership_start(od, &arg, &invert);
if (arg == NULL)
goto fail_return;
while (*arg != NUL) {
bool inv_val = false;
int len;
switch (*arg) {
case ',':
arg = SPN_WHITESPACE_CHARS(arg+1);
if ((*arg == ',') || (*arg == '|'))
goto fail_return;
continue;
case '-':
case '!':
inv_val = true;
/* FALLTHROUGH */
case '+':
case '|':
arg = SPN_WHITESPACE_CHARS(arg+1);
}
len = (int)(BRK_SET_SEPARATOR_CHARS(arg) - arg);
if (len == 0)
break;
if ((len == 3) && (strncmp(arg, zAll, 3) == 0)) {
if (inv_val)
res = 0;
else res = ~0UL;
}
else if ((len == 4) && (strncmp(arg, zNone, 4) == 0)) {
if (! inv_val)
res = 0;
}
else do {
char * pz;
uintptr_t bit = strtoul(arg, &pz, 0);
if (pz != arg + len) {
bit = find_member_bit(opts, od, pz, len, nm_list, nm_ct);
if (bit == 0UL)
goto fail_return;
}
if (inv_val)
res &= ~bit;
else res |= bit;
} while (false);
arg = SPN_WHITESPACE_CHARS(arg + len);
}
if (invert)
res ^= ~0UL;
if (nm_ct < (8 * sizeof(uintptr_t)))
res &= (1UL << nm_ct) - 1UL;
od->optCookie = VOIDP(res);
}
return;
fail_return:
od->optCookie = VOIDP(0);
}
/** @}
*
* Local Variables:
* mode: C
* c-file-style: "stroustrup"
* indent-tabs-mode: nil
* End:
* end of autoopts/enum.c */
