psprintf.c File Reference

#include "postgres.h"
#include "utils/memutils.h"

Include dependency graph for psprintf.c:

Go to the source code of this file.

Functions
char *	psprintf (const char *fmt,...)
size_t	pvsnprintf (char *buf, size_t len, const char *fmt, va_list args)

Function Documentation

psprintf()

char * psprintf	(	const char *	fmt,
			...
	)

Definition at line 43 of file psprintf.c.

{
    int         save_errno = errno;
    size_t      len = 128;      /* initial assumption about buffer size */
 
    for (;;)
    {
        char       *result;
        va_list     args;
        size_t      newlen;
 
        /*
         * Allocate result buffer.  Note that in frontend this maps to malloc
         * with exit-on-error.
         */
        result = (char *) palloc(len);
 
        /* Try to format the data. */
        errno = save_errno;
        va_start(args, fmt);
        newlen = pvsnprintf(result, len, fmt, args);
        va_end(args);
 
        if (newlen < len)
            return result;      /* success */
 
        /* Release buffer and loop around to try again with larger len. */
        pfree(result);
        len = newlen;
    }
}

References generate_unaccent_rules::args, len, palloc(), pfree(), and pvsnprintf().

Referenced by _printTocEntry(), accesstype_arg_to_string(), accesstype_to_string(), adjust_data_dir(), anytime_typmodout(), anytimestamp_typmodout(), auth_failed(), BaseBackup(), bbsink_server_begin_archive(), bbsink_server_begin_manifest(), bbsink_server_end_manifest(), BootstrapModeMain(), brin_metapage_info(), brin_page_type(), bt_entry_unique_check(), bt_metap(), bt_multi_page_stats(), bt_page_stats_internal(), bt_report_duplicate(), bt_target_page_check(), build_function_result_tupdesc_d(), build_server_final_message(), build_server_first_message(), build_subplan(), cash_out(), check_compressed_file(), check_control_files(), check_for_incompatible_polymorphics(), check_oauth_validator(), check_toast_tuple(), check_toasted_attribute(), check_tuple(), check_tuple_attribute(), check_tuple_header(), check_tuple_visibility(), check_valid_polymorphic_signature(), complex_out(), create_script_for_old_cluster_deletion(), create_tablespace_directories(), create_xlog_or_symlink(), CreateBackupStreamer(), data_type_check_query(), datasegpath(), dblink_get_pkey(), DebugPrintBufferRefcount(), defGetString(), describeOneTableDetails(), destroy_tablespace_directories(), determineNotNullFlags(), do_init(), do_shell(), dumpAttrDef(), dumpConstraint(), dumpFunc(), dumpPolicy(), dumpPublicationNamespace(), dumpPublicationTable(), dumpRule(), dumpSubscriptionTable(), dumpTrigger(), ecpg_postprocess_result(), ecpg_start_test(), editFile(), exec_command_conninfo(), execute_extension_script(), expand_dynamic_library_name(), expand_tilde(), expect_boolean_value(), expect_integer_value(), ExplainNode(), ExplainPropertyFloat(), fetch_finfo_record(), find_extension_control_filename(), float4_to_char(), float8_to_char(), foreign_grouping_ok(), foreign_join_ok(), format_type_extended(), generate_object_name(), get_altertable_subcmdinfo(), get_collation_actual_version_libc(), get_exec_path(), get_extension_control_directories(), get_hba_options(), get_loadable_libraries(), get_old_cluster_logical_slot_infos_query(), get_role_password(), get_user_name(), GetConfFilesInDir(), GetDatabasePath(), getFormattedOperatorName(), GetIncrementalFilePath(), getObjectIdentityParts(), GetWALBlockInfo(), GetWALRecordInfo(), GetXLogSummaryStats(), gtsvectorout(), GUCArrayAdd(), helpSQL(), initialize_data_directory(), initialize_environment(), initializeInput(), InitializeSystemUser(), InitWalRecovery(), int4_to_char(), isolation_start_test(), json_errdetail(), libpqrcv_connect(), line_out(), llvm_compile_module(), llvm_expand_funcname(), llvm_function_reference(), load_libraries(), log_status_format(), main(), make_temp_sockdir(), makeMultirangeTypeName(), md5_crypt_verify(), modify_subscriber_sysid(), open_auth_file(), overexplain_debug(), overexplain_range_table(), parse_compress_specification(), parse_extension_control_file(), parse_hba_auth_opt(), parse_hba_line(), parse_required_wal(), parseCommandLine(), ParseConfigFile(), perform_base_backup(), pg_control_checkpoint(), pg_get_multixact_members(), pg_import_system_collations(), pg_size_pretty_numeric(), pg_tablespace_databases(), pgstatindex_impl(), plain_crypt_verify(), postgresGetForeignRelSize(), postprocess_sql_command(), PrintManyTest(), PrintString(), printTypmod(), process_directory_recursively(), process_psqlrc_file(), ProcessConfigFileInternal(), ProcessParallelApplyMessage(), ProcessParallelMessage(), prompt_for_password(), pset_value_string(), psql_start_test(), readCommandResponse(), reconstruct_from_incremental_file(), regcomp_auth_token(), ResourceOwnerReleaseAll(), ResOwnerPrintBufferIO(), ResOwnerPrintCatCache(), ResOwnerPrintCatCacheList(), ResOwnerPrintDSM(), ResOwnerPrintFile(), ResOwnerPrintRelCache(), ResOwnerPrintTupleDesc(), scram_init(), sendDir(), SendXlogRecPtrResult(), sequence_options(), set_input(), set_null_conf(), set_replication_progress(), set_tablespace_directory_suffix(), smgr_aio_describe_identity(), spawn_process(), sql_exec_searchtables(), SS_make_initplan_from_plan(), SS_process_ctes(), start_postmaster(), StartLogStreamer(), stop_standby_server(), StoreQueryTuple(), substitute_path_macro(), supports_compression(), syncrep_yyerror(), test_resowner_many(), test_resowner_priorities(), test_singlerowmode(), tokenize_auth_file(), typenameTypeMod(), validate_compress_specification(), verify_backup_checksums(), verify_heapam(), verify_plain_backup_directory(), verify_tar_backup(), wait_for_connection_state(), widget_out(), write_version_file(), XLogDumpDisplayStats(), and xstrcat().

pvsnprintf()

size_t pvsnprintf	(	char *	buf,
		size_t	len,
		const char *	fmt,
		va_list	args
	)

Definition at line 103 of file psprintf.c.

{
    int         nprinted;
 
    nprinted = vsnprintf(buf, len, fmt, args);
 
    /* We assume failure means the fmt is bogus, hence hard failure is OK */
    if (unlikely(nprinted < 0))
    {
#ifndef FRONTEND
        elog(ERROR, "vsnprintf failed: %m with format string \"%s\"", fmt);
#else
        fprintf(stderr, "vsnprintf failed: %m with format string \"%s\"\n",
                fmt);
        exit(EXIT_FAILURE);
#endif
    }
 
    if ((size_t) nprinted < len)
    {
        /* Success.  Note nprinted does not include trailing null. */
        return (size_t) nprinted;
    }
 
    /*
     * We assume a C99-compliant vsnprintf, so believe its estimate of the
     * required space, and add one for the trailing null.  (If it's wrong, the
     * logic will still work, but we may loop multiple times.)
     *
     * Choke if the required space would exceed MaxAllocSize.  Note we use
     * this palloc-oriented overflow limit even when in frontend.
     */
    if (unlikely((size_t) nprinted > MaxAllocSize - 1))
    {
#ifndef FRONTEND
        ereport(ERROR,
                (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                 errmsg("out of memory")));
#else
        fprintf(stderr, _("out of memory\n"));
        exit(EXIT_FAILURE);
#endif
    }
 
    return nprinted + 1;
}

References _, generate_unaccent_rules::args, buf, elog, ereport, errcode(), errmsg(), ERROR, EXIT_FAILURE, fprintf, len, MaxAllocSize, unlikely, and vsnprintf.

Referenced by ahprintf(), appendJSONKeyValueFmt(), appendStringInfoVA(), archprintf(), psprintf(), and tarPrintf().