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Viewing changes to src/backend/utils/misc/help_config.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2009-03-20 12:00:13 UTC
  • Revision ID: james.westby@ubuntu.com-20090320120013-hogj7egc5mjncc5g
Tags: upstream-8.4~0cvs20090328
Import upstream version 8.4~0cvs20090328

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src/backend/utils/misc/help_config.c
 
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/*-------------------------------------------------------------------------
 
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 * help_config.c
 
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 *
 
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 * Displays available options under grand unified configuration scheme
 
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 *
 
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 * Options whose flag bits are set to GUC_NO_SHOW_ALL, GUC_NOT_IN_SAMPLE,
 
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 * or GUC_DISALLOW_IN_FILE are not displayed, unless the user specifically
 
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 * requests that variable by name
 
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 *
 
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 * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
 
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 *
 
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 * IDENTIFICATION
 
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 *        $PostgreSQL$
 
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 *
 
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 *-------------------------------------------------------------------------
 
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 */
 
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#include "postgres.h"
 
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#include <float.h>
 
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#include <limits.h>
 
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#include <unistd.h>
 
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#include "utils/guc_tables.h"
 
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#include "utils/help_config.h"
 
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/*
 
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 * This union allows us to mix the numerous different types of structs
 
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 * that we are organizing.
 
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 */
 
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typedef union
 
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{
 
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        struct config_generic generic;
 
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        struct config_bool bool;
 
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        struct config_real real;
 
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        struct config_int integer;
 
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        struct config_string string;
 
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        struct config_enum _enum;
 
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} mixedStruct;
 
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static void printMixedStruct(mixedStruct *structToPrint);
 
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static bool displayStruct(mixedStruct *structToDisplay);
 
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int
 
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GucInfoMain(void)
 
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{
 
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        struct config_generic **guc_vars;
 
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        int                     numOpts,
 
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                                i;
 
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        /* Initialize the guc_variables[] array */
 
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        build_guc_variables();
 
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        guc_vars = get_guc_variables();
 
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        numOpts = GetNumConfigOptions();
 
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        for (i = 0; i < numOpts; i++)
 
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        {
 
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                mixedStruct *var = (mixedStruct *) guc_vars[i];
 
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                if (displayStruct(var))
 
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                        printMixedStruct(var);
 
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        }
 
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        return 0;
 
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}
 
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/*
 
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 * This function will return true if the struct passed to it
 
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 * should be displayed to the user.
 
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 */
 
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static bool
 
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displayStruct(mixedStruct *structToDisplay)
 
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{
 
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        return !(structToDisplay->generic.flags & (GUC_NO_SHOW_ALL |
 
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                                                                                           GUC_NOT_IN_SAMPLE |
 
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                                                                                           GUC_DISALLOW_IN_FILE));
 
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}
 
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/*
 
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 * This function prints out the generic struct passed to it. It will print out
 
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 * a different format, depending on what the user wants to see.
 
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 */
 
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static void
 
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printMixedStruct(mixedStruct *structToPrint)
 
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{
 
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        printf("%s\t%s\t%s\t",
 
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                   structToPrint->generic.name,
 
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                   GucContext_Names[structToPrint->generic.context],
 
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                   _(config_group_names[structToPrint->generic.group]));
 
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        switch (structToPrint->generic.vartype)
 
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        {
 
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                case PGC_BOOL:
 
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                        printf("BOOLEAN\t%s\t\t\t",
 
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                                   (structToPrint->bool.reset_val == 0) ?
 
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                                   "FALSE" : "TRUE");
 
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                        break;
 
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                case PGC_INT:
 
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                        printf("INTEGER\t%d\t%d\t%d\t",
 
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                                   structToPrint->integer.reset_val,
 
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                                   structToPrint->integer.min,
 
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                                   structToPrint->integer.max);
 
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                        break;
 
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                case PGC_REAL:
 
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                        printf("REAL\t%g\t%g\t%g\t",
 
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                                   structToPrint->real.reset_val,
 
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                                   structToPrint->real.min,
 
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                                   structToPrint->real.max);
 
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                        break;
 
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                case PGC_STRING:
 
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                        printf("STRING\t%s\t\t\t",
 
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                                   structToPrint->string.boot_val ? structToPrint->string.boot_val : "");
 
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                        break;
 
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                case PGC_ENUM:
 
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                        printf("ENUM\t%s\t\t\t",
 
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                                   config_enum_lookup_by_value(&structToPrint->_enum,
 
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                                                                                           structToPrint->_enum.boot_val));
 
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                        break;
 
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                default:
 
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                        write_stderr("internal error: unrecognized run-time parameter type\n");
 
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                        break;
 
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        }
 
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        printf("%s\t%s\n",
 
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                   (structToPrint->generic.short_desc == NULL) ? "" : _(structToPrint->generic.short_desc),
 
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                   (structToPrint->generic.long_desc == NULL) ? "" : _(structToPrint->generic.long_desc));
 
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}