popthelp.c

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    if (opt != NULL)
    while (opt->longName || opt->shortName || opt->arg) {
	if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
	    if (opt->arg)	/* XXX program error */
	    len = maxArgWidth(opt->arg, translation_domain);
	    if (len > max) max = len;
	} else if (!(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) {
	    len = sizeof("  ")-1;
	    if (opt->shortName != '\0') len += sizeof("-X")-1;
	    if (opt->shortName != '\0' && opt->longName) len += sizeof(", ")-1;
	    if (opt->longName) {
		len += ((opt->argInfo & POPT_ARGFLAG_ONEDASH)
			? sizeof("-")-1 : sizeof("--")-1);
		len += strlen(opt->longName);
	    }

	    s = getArgDescrip(opt, translation_domain);
	    if (s)
		len += sizeof("=")-1 + strlen(s);
	    if (opt->argInfo & POPT_ARGFLAG_OPTIONAL) len += sizeof("[]")-1;
	    if (len > max) max = len;
	}

	opt++;
    }
    
    return max;
}

/**
 * Display popt alias and exec help.
 * @param fp		output file handle
 * @param items		alias/exec array
 * @param nitems	no. of alias/exec entries
 * @param left
 * @param translation_domain	translation domain
 */
static void itemHelp(FILE * fp,
		/*@null@*/ poptItem items, int nitems, int left,
		/*@null@*/ const char * translation_domain)
	/*@globals fileSystem @*/
	/*@modifies *fp, fileSystem @*/
{
    poptItem item;
    int i;

    if (items != NULL)
    for (i = 0, item = items; i < nitems; i++, item++) {
	const struct poptOption * opt;
	opt = &item->option;
	if ((opt->longName || opt->shortName) && 
	    !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN))
	    singleOptionHelp(fp, left, opt, translation_domain);
    }
}

/**
 * Display help text for a table of options.
 * @param con		context
 * @param fp		output file handle
 * @param table		option(s)
 * @param left
 * @param translation_domain	translation domain
 */
static void singleTableHelp(poptContext con, FILE * fp,
		/*@null@*/ const struct poptOption * table, int left,
		/*@null@*/ const char * translation_domain)
	/*@globals fileSystem @*/
	/*@modifies *fp, fileSystem @*/
{
    const struct poptOption * opt;
    const char *sub_transdom;

    if (table == poptAliasOptions) {
	itemHelp(fp, con->aliases, con->numAliases, left, NULL);
	itemHelp(fp, con->execs, con->numExecs, left, NULL);
	return;
    }

    if (table != NULL)
    for (opt = table; (opt->longName || opt->shortName || opt->arg); opt++) {
	if ((opt->longName || opt->shortName) && 
	    !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN))
	    singleOptionHelp(fp, left, opt, translation_domain);
    }

    if (table != NULL)
    for (opt = table; (opt->longName || opt->shortName || opt->arg); opt++) {
	if ((opt->argInfo & POPT_ARG_MASK) != POPT_ARG_INCLUDE_TABLE)
	    continue;
	sub_transdom = getTableTranslationDomain(opt->arg);
	if (sub_transdom == NULL)
	    sub_transdom = translation_domain;
	    
	if (opt->descrip)
	    fprintf(fp, "\n%s\n", D_(sub_transdom, opt->descrip));

	singleTableHelp(con, fp, opt->arg, left, sub_transdom);
    }
}

/**
 * @param con		context
 * @param fp		output file handle
 */
static int showHelpIntro(poptContext con, FILE * fp)
	/*@globals fileSystem @*/
	/*@modifies *fp, fileSystem @*/
{
    int len = 6;
    const char * fn;

    fprintf(fp, POPT_("Usage:"));
    if (!(con->flags & POPT_CONTEXT_KEEP_FIRST)) {
/*@-boundsread@*/
	/*@-nullderef@*/	/* LCL: wazzup? */
	fn = con->optionStack->argv[0];
	/*@=nullderef@*/
/*@=boundsread@*/
	if (fn == NULL) return len;
	if (strchr(fn, '/')) fn = strrchr(fn, '/') + 1;
	fprintf(fp, " %s", fn);
	len += strlen(fn) + 1;
    }

    return len;
}

void poptPrintHelp(poptContext con, FILE * fp, /*@unused@*/ int flags)
{
    int leftColWidth;

    (void) showHelpIntro(con, fp);
    if (con->otherHelp)
	fprintf(fp, " %s\n", con->otherHelp);
    else
	fprintf(fp, " %s\n", POPT_("[OPTION...]"));

    leftColWidth = maxArgWidth(con->options, NULL);
    singleTableHelp(con, fp, con->options, leftColWidth, NULL);
}

/**
 * @param fp		output file handle
 * @param cursor
 * @param opt		option(s)
 * @param translation_domain	translation domain
 */
static int singleOptionUsage(FILE * fp, int cursor, 
		const struct poptOption * opt,
		/*@null@*/ const char *translation_domain)
	/*@globals fileSystem @*/
	/*@modifies *fp, fileSystem @*/
{
    int len = 4;
    char shortStr[2] = { '\0', '\0' };
    const char * item = shortStr;
    const char * argDescrip = getArgDescrip(opt, translation_domain);

    if (opt->shortName != '\0' && opt->longName != NULL) {
	len += 2;
	if (!(opt->argInfo & POPT_ARGFLAG_ONEDASH)) len++;
	len += strlen(opt->longName);
    } else if (opt->shortName != '\0') {
	len++;
	shortStr[0] = opt->shortName;
	shortStr[1] = '\0';
    } else if (opt->longName) {
	len += strlen(opt->longName);
	if (!(opt->argInfo & POPT_ARGFLAG_ONEDASH)) len++;
	item = opt->longName;
    }

    if (len == 4) return cursor;

    if (argDescrip) 
	len += strlen(argDescrip) + 1;

    if ((cursor + len) > 79) {
	fprintf(fp, "\n       ");
	cursor = 7;
    } 

    if (opt->longName && opt->shortName) {
	fprintf(fp, " [-%c|-%s%s%s%s]",
	    opt->shortName, ((opt->argInfo & POPT_ARGFLAG_ONEDASH) ? "" : "-"),
	    opt->longName,
	    (argDescrip ? " " : ""),
	    (argDescrip ? argDescrip : ""));
    } else {
	fprintf(fp, " [-%s%s%s%s]",
	    ((opt->shortName || (opt->argInfo & POPT_ARGFLAG_ONEDASH)) ? "" : "-"),
	    item,
	    (argDescrip ? (opt->shortName != '\0' ? " " : "=") : ""),
	    (argDescrip ? argDescrip : ""));
    }

    return cursor + len + 1;
}

/**
 * Display popt alias and exec usage.
 * @param fp		output file handle
 * @param cursor
 * @param item		alias/exec array
 * @param nitems	no. of ara/exec entries
 * @param translation_domain	translation domain
 */
static int itemUsage(FILE * fp, int cursor, poptItem item, int nitems,
		/*@null@*/ const char * translation_domain)
	/*@globals fileSystem @*/
	/*@modifies *fp, fileSystem @*/
{
    int i;

    /*@-branchstate@*/		/* FIX: W2DO? */
    if (item != NULL)
    for (i = 0; i < nitems; i++, item++) {
	const struct poptOption * opt;
	opt = &item->option;
        if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INTL_DOMAIN) {
	    translation_domain = (const char *)opt->arg;
	} else if ((opt->longName || opt->shortName) &&
		 !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) {
	    cursor = singleOptionUsage(fp, cursor, opt, translation_domain);
	}
    }
    /*@=branchstate@*/

    return cursor;
}

/**
 * Keep track of option tables already processed.
 */
typedef struct poptDone_s {
    int nopts;
    int maxopts;
    const void ** opts;
} * poptDone;

/**
 * Display usage text for a table of options.
 * @param con		context
 * @param fp		output file handle
 * @param cursor
 * @param opt		option(s)
 * @param translation_domain	translation domain
 * @param done		tables already processed
 * @return
 */
static int singleTableUsage(poptContext con, FILE * fp, int cursor,
		/*@null@*/ const struct poptOption * opt,
		/*@null@*/ const char * translation_domain,
		/*@null@*/ poptDone done)
	/*@globals fileSystem @*/
	/*@modifies *fp, done, fileSystem @*/
{
    /*@-branchstate@*/		/* FIX: W2DO? */
    if (opt != NULL)
    for (; (opt->longName || opt->shortName || opt->arg) ; opt++) {
        if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INTL_DOMAIN) {
	    translation_domain = (const char *)opt->arg;
	} else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
	    if (done) {
		int i = 0;
		for (i = 0; i < done->nopts; i++) {
/*@-boundsread@*/
		    const void * that = done->opts[i];
/*@=boundsread@*/
		    if (that == NULL || that != opt->arg)
			/*@innercontinue@*/ continue;
		    /*@innerbreak@*/ break;
		}
		/* Skip if this table has already been processed. */
		if (opt->arg == NULL || i < done->nopts)
		    continue;
/*@-boundswrite@*/
		if (done->nopts < done->maxopts)
		    done->opts[done->nopts++] = (const void *) opt->arg;
/*@=boundswrite@*/
	    }
	    cursor = singleTableUsage(con, fp, cursor, opt->arg,
			translation_domain, done);
	} else if ((opt->longName || opt->shortName) &&
		 !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) {
	    cursor = singleOptionUsage(fp, cursor, opt, translation_domain);
	}
    }
    /*@=branchstate@*/

    return cursor;
}

/**
 * Return concatenated short options for display.
 * @todo Sub-tables should be recursed.
 * @param opt		option(s)
 * @param fp		output file handle
 * @retval str		concatenation of short options
 * @return		length of display string
 */
static int showShortOptions(const struct poptOption * opt, FILE * fp,
		/*@null@*/ char * str)
	/*@globals fileSystem @*/
	/*@modifies *str, *fp, fileSystem @*/
{
    char * s = alloca(300);	/* larger than the ascii set */

    s[0] = '\0';
    /*@-branchstate@*/		/* FIX: W2DO? */
    if (str == NULL) {
	memset(s, 0, sizeof(s));
	str = s;
    }
    /*@=branchstate@*/

/*@-boundswrite@*/
    if (opt != NULL)
    for (; (opt->longName || opt->shortName || opt->arg); opt++) {
	if (opt->shortName && !(opt->argInfo & POPT_ARG_MASK))
	    str[strlen(str)] = opt->shortName;
	else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE)
	    if (opt->arg)	/* XXX program error */
		(void) showShortOptions(opt->arg, fp, str);
    } 
/*@=boundswrite@*/

    if (s != str || *s != '\0')
	return 0;

    fprintf(fp, " [-%s]", s);
    return strlen(s) + 4;
}

void poptPrintUsage(poptContext con, FILE * fp, /*@unused@*/ int flags)
{
    poptDone done = memset(alloca(sizeof(*done)), 0, sizeof(*done));
    int cursor;

    done->nopts = 0;
    done->maxopts = 64;
    cursor = done->maxopts * sizeof(*done->opts);
/*@-boundswrite@*/
    done->opts = memset(alloca(cursor), 0, cursor);
    done->opts[done->nopts++] = (const void *) con->options;
/*@=boundswrite@*/

    cursor = showHelpIntro(con, fp);
    cursor += showShortOptions(con->options, fp, NULL);
    cursor = singleTableUsage(con, fp, cursor, con->options, NULL, done);
    cursor = itemUsage(fp, cursor, con->aliases, con->numAliases, NULL);
    cursor = itemUsage(fp, cursor, con->execs, con->numExecs, NULL);

    if (con->otherHelp) {
	cursor += strlen(con->otherHelp) + 1;
	if (cursor > 79) fprintf(fp, "\n       ");
	fprintf(fp, " %s", con->otherHelp);
    }

    fprintf(fp, "\n");
}

void poptSetOtherOptionHelp(poptContext con, const char * text)
{
    con->otherHelp = _free(con->otherHelp);
    con->otherHelp = xstrdup(text);
}
/*@=type@*/