pg_getopt_ctx.c File Reference

#include "c.h"
#include "port/pg_getopt_ctx.h"

Include dependency graph for pg_getopt_ctx.c:

Go to the source code of this file.

Macros
#define	BADCH   (int)'?'
#define	BADARG   (int)':'
#define	EMSG   ""

Functions
void	pg_getopt_start (pg_getopt_ctx *ctx, int nargc, char *const *nargv, const char *ostr)
int	pg_getopt_next (pg_getopt_ctx *ctx)

Macro Definition Documentation

BADARG

#define BADARG   (int)':'

Definition at line 43 of file pg_getopt_ctx.c.

BADCH

#define BADCH   (int)'?'

Definition at line 42 of file pg_getopt_ctx.c.

EMSG

#define EMSG   ""

Definition at line 44 of file pg_getopt_ctx.c.

Function Documentation

pg_getopt_next()

int pg_getopt_next

(

pg_getopt_ctx *

ctx

)

Definition at line 72 of file pg_getopt_ctx.c.

{
    const char *oli;            /* option letter list index */
 
    if (!*ctx->place)
    {                           /* update scanning pointer */
        if (ctx->optind >= ctx->nargc || *(ctx->place = ctx->nargv[ctx->optind]) != '-')
        {
            ctx->place = EMSG;
            return -1;
        }
        if (ctx->place[1] && *++ctx->place == '-' && ctx->place[1] == '\0')
        {                       /* found "--" */
            ++ctx->optind;
            ctx->place = EMSG;
            return -1;
        }
    }                           /* option letter okay? */
    if ((ctx->optopt = (int) *ctx->place++) == (int) ':' ||
        !(oli = strchr(ctx->ostr, ctx->optopt)))
    {
        /*
         * if the user didn't specify '-' as an option, assume it means -1.
         */
        if (ctx->optopt == (int) '-')
        {
            ctx->place = EMSG;
            return -1;
        }
        if (!*ctx->place)
            ++ctx->optind;
        if (ctx->opterr && *ctx->ostr != ':')
            (void) fprintf(stderr,
                           "illegal option -- %c\n", ctx->optopt);
        return BADCH;
    }
    if (*++oli != ':')
    {                           /* don't need argument */
        ctx->optarg = NULL;
        if (!*ctx->place)
            ++ctx->optind;
    }
    else
    {                           /* need an argument */
        if (*ctx->place)        /* no white space */
            ctx->optarg = ctx->place;
        else if (ctx->nargc <= ++ctx->optind)
        {                       /* no arg */
            ctx->place = EMSG;
            if (*ctx->ostr == ':')
                return BADARG;
            if (ctx->opterr)
                (void) fprintf(stderr,
                               "option requires an argument -- %c\n",
                               ctx->optopt);
            return BADCH;
        }
        else
            /* white space */
            ctx->optarg = ctx->nargv[ctx->optind];
        ctx->place = EMSG;
        ++ctx->optind;
    }
    return ctx->optopt;         /* dump back option letter */
}

References BADARG, BADCH, EMSG, fb(), fprintf, pg_getopt_ctx::nargc, pg_getopt_ctx::nargv, pg_getopt_ctx::optarg, pg_getopt_ctx::opterr, pg_getopt_ctx::optind, pg_getopt_ctx::optopt, pg_getopt_ctx::ostr, and pg_getopt_ctx::place.

Referenced by BootstrapModeMain(), getopt(), PostmasterMain(), and process_postgres_switches().

pg_getopt_start()

void pg_getopt_start	(	pg_getopt_ctx *	ctx,
		int	nargc,
		char *const *	nargv,
		const char *	ostr
	)

Definition at line 54 of file pg_getopt_ctx.c.

{
    ctx->nargc = nargc;
    ctx->nargv = nargv;
    ctx->ostr = ostr;
 
    ctx->optind = 1;
    ctx->optarg = NULL;
    ctx->opterr = 1;            /* Caller may clear this after the call */
    ctx->optopt = 0;
 
    ctx->place = EMSG;          /* option letter processing */
}

References EMSG, fb(), pg_getopt_ctx::nargc, pg_getopt_ctx::nargv, pg_getopt_ctx::optarg, pg_getopt_ctx::opterr, pg_getopt_ctx::optind, pg_getopt_ctx::optopt, pg_getopt_ctx::ostr, and pg_getopt_ctx::place.

Referenced by BootstrapModeMain(), getopt(), PostmasterMain(), and process_postgres_switches().