/**
* \file autoopts.c
*
* This file contains all of the routines that must be linked into
* an executable to use the generated option processing. The optional
* routines are in separately compiled modules so that they will not
* necessarily be linked in.
*
* @addtogroup autoopts
* @{
*/
/*
* 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
*/
/**
* The number of tab characters to skip when printing continuation lines.
*/
static unsigned int tab_skip_ct = 0;
/**
* handle an option.
*
* This routine handles equivalencing, sets the option state flags and
* invokes the handler procedure, if any.
*/
static tSuccess
handle_opt(tOptions * opts, tOptState * o_st)
{
/*
* Save a copy of the option procedure pointer.
* If this is an equivalence class option, we still want this proc.
*/
tOptDesc * od = o_st->pOD;
tOptProc * opt_proc = od->pOptProc;
if (od->fOptState & OPTST_ALLOC_ARG)
AGFREE(od->optArg.argString);
od->optArg.argString = o_st->pzOptArg;
/*
* IF we are presetting options, then we will ignore any un-presettable
* options. They are the ones either marked as such.
*/
if ( ((opts->fOptSet & OPTPROC_PRESETTING) != 0)
&& ((od->fOptState & OPTST_NO_INIT) != 0)
)
return PROBLEM;
/*
* IF this is an equivalence class option,
* THEN
* Save the option value that got us to this option
* entry. (It may not be od->optChar[0], if this is an
* equivalence entry.)
* set the pointer to the equivalence class base
*/
if (od->optEquivIndex != NO_EQUIVALENT) {
tOptDesc * eqv_od = opts->pOptDesc + od->optEquivIndex;
/*
* IF the current option state has not been defined (set on the
* command line), THEN we will allow continued resetting of
* the value. Once "defined", then it must not change.
*/
if ((od->fOptState & OPTST_DEFINED) != 0) {
/*
* The equivalenced-to option has been found on the command
* line before. Make sure new occurrences are the same type.
*
* IF this option has been previously equivalenced and
* it was not the same equivalenced-to option,
* THEN we have a usage problem.
*/
if (eqv_od->optActualIndex != od->optIndex) {
fprintf(stderr, zmultiway_bug, eqv_od->pz_Name, od->pz_Name,
(opts->pOptDesc + eqv_od->optActualIndex)->pz_Name);
return FAILURE;
}
} else {
/*
* Set the equivalenced-to actual option index to no-equivalent
* so that we set all the entries below. This option may either
* never have been selected before, or else it was selected by
* some sort of "presetting" mechanism.
*/
eqv_od->optActualIndex = NO_EQUIVALENT;
}
if (eqv_od->optActualIndex != od->optIndex) {
/*
* First time through, copy over the state
* and add in the equivalence flag
*/
eqv_od->optActualValue = od->optValue;
eqv_od->optActualIndex = od->optIndex;
o_st->flags |= OPTST_EQUIVALENCE;
}
/*
* Copy the most recent option argument. set membership state
* is kept in 'eqv_od->optCookie'. Do not overwrite.
*/
eqv_od->optArg.argString = od->optArg.argString;
od = eqv_od;
/*
* Keep track of count only for DEFINED (command line) options.
* IF we have too many, build up an error message and bail.
*/
if ( (od->fOptState & OPTST_DEFINED)
&& (++od->optOccCt > od->optMaxCt) )
return too_many_occurrences(opts, od);
/*
* If provided a procedure to call, call it
*/
if (opt_proc != NULL)
(*opt_proc)(opts, od);
return SUCCESS;
}
/**
* Find the option descriptor and option argument (if any) for the
* next command line argument. DO NOT modify the descriptor. Put
* all the state in the state argument so that the option can be skipped
* without consequence (side effect).
*
* @param opts the program option descriptor
* @param o_st the state of the next found option
*/
static tSuccess
next_opt(tOptions * opts, tOptState * o_st)
{
{
tSuccess res = find_opt(opts, o_st);
if (! SUCCESSFUL(res))
return res;
}
/**
* Process all the options from our current position onward. (This allows
* interspersed options and arguments for the few non-standard programs that
* require it.) Thus, do not rewind option indexes because some programs
* choose to re-invoke after a non-option.
*
* @param[in,out] opts program options descriptor
* @returns SUCCESS or FAILURE
*/
static tSuccess
regular_opts(tOptions * opts)
{
/* assert: opts->fOptSet & OPTPROC_IMMEDIATE == 0 */
for (;;) {
tOptState opt_st = OPTSTATE_INITIALIZER(DEFINED);
switch (next_opt(opts, &opt_st)) {
case FAILURE: goto failed_option;
case PROBLEM: return SUCCESS; /* no more args */
case SUCCESS: break;
}
/*
* IF this is an immediate action option,
* THEN skip it (unless we are supposed to do it a second time).
*/
if (! DO_NORMALLY(opt_st.flags)) {
if (! DO_SECOND_TIME(opt_st.flags))
continue;
opt_st.pOD->optOccCt--; /* don't count this repetition */
}
if (! SUCCESSFUL(handle_opt(opts, &opt_st)))
break;
} failed_option:;
if ((opts->fOptSet & OPTPROC_ERRSTOP) != 0)
(*opts->pUsageProc)(opts, EXIT_FAILURE);
return FAILURE;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* THESE ROUTINES ARE CALLABLE FROM THE GENERATED OPTION PROCESSING CODE
*/
/*=--subblock=arg=arg_type,arg_name,arg_desc =*/
/*=*
* library: opts
* header: your-opts.h
*
* lib_description:
*
* These are the routines that libopts users may call directly from their
* code. There are several other routines that can be called by code
* generated by the libopts option templates, but they are not to be
* called from any other user code. The @file{options.h} header is
* fairly clear about this, too.
=*/
/*=export_func optionProcess
*
* what: this is the main option processing routine
*
* arg: + tOptions * + opts + program options descriptor +
* arg: + int + a_ct + program arg count +
* arg: + char ** + a_v + program arg vector +
*
* ret_type: int
* ret_desc: the count of the arguments processed
*
* doc:
*
* This is the main entry point for processing options. It is intended
* that this procedure be called once at the beginning of the execution of
* a program. Depending on options selected earlier, it is sometimes
* necessary to stop and restart option processing, or to select completely
* different sets of options. This can be done easily, but you generally
* do not want to do this.
*
* The number of arguments processed always includes the program name.
* If one of the arguments is "--", then it is counted and the processing
* stops. If an error was encountered and errors are to be tolerated, then
* the returned value is the index of the argument causing the error.
* A hyphen by itself ("-") will also cause processing to stop and will
* @emph{not} be counted among the processed arguments. A hyphen by itself
* is treated as an operand. Encountering an operand stops option
* processing.
*
* err: Errors will cause diagnostics to be printed. @code{exit(3)} may
* or may not be called. It depends upon whether or not the options
* were generated with the "allow-errors" attribute, or if the
* ERRSKIP_OPTERR or ERRSTOP_OPTERR macros were invoked.
=*/
int
optionProcess(tOptions * opts, int a_ct, char ** a_v)
{
if (! SUCCESSFUL(validate_struct(opts, a_v[0])))
ao_bug(zbad_data_msg);
/*
* Establish the real program name, the program full path,
* and do all the presetting the first time thru only.
*/
if (! ao_initialize(opts, a_ct, a_v))
return 0;
/*
* IF we are (re)starting,
* THEN reset option location
*/
if (opts->curOptIdx <= 0) {
opts->curOptIdx = 1;
opts->pzCurOpt = NULL;
}
if (! SUCCESSFUL(regular_opts(opts)))
return (int)opts->origArgCt;
/*
* IF there were no errors
* AND we have RC/INI files
* AND there is a request to save the files
* THEN do that now before testing for conflicts.
* (conflicts are ignored in preset options)
*/
switch (opts->specOptIdx.save_opts) {
case 0:
case NO_EQUIVALENT:
break;
default:
{
tOptDesc * od = opts->pOptDesc + opts->specOptIdx.save_opts;
if (SELECTED_OPT(od)) {
optionSaveFile(opts);
option_exits(EXIT_SUCCESS);
}
}
}
/*
* IF we are checking for errors,
* THEN look for too few occurrences of required options
*/
if (((opts->fOptSet & OPTPROC_ERRSTOP) != 0)
&& (! is_consistent(opts)))
(*opts->pUsageProc)(opts, EXIT_FAILURE);
return (int)opts->curOptIdx;
}
/** @}
*
* Local Variables:
* mode: C
* c-file-style: "stroustrup"
* indent-tabs-mode: nil
* End:
* end of autoopts/autoopts.c */
