DDLP (1)

SYNOPSIS

ddlp [-a[1|2|4]] [-f] [-h<file>] file

DESCRIPTION

ddlp processes a ddl-file and generates a dbd-file and a header file with structures and ids for records, fields and keys.

The -a option sets the structure alignment which must match the one used by the C compiler. Specifying the -f options causes ddlp to only generate constants for those fields that are keys. The -h option overrides the default header file name by the one specified by the user.

DATA DEFINITION LANGUAGE GRAMMER

database

-> "database" name "{" decl {decl} "}"

decl

-> "data" "file" "[" pagesize "]" name "contains" name ";" | "key" "file" "[" pagesize "]" name "contains" name "." name ";" | "define" name expr | "sequence" name int [sortorder] "by" int ';' | "record" name "{" field {field} [key_decls] "}"

key_decls

-> primary_key {alternate_key} {foreign_key}

primary_key

-> "primary" "key" name key_def ";"

alternate_key

-> "alternate" ["optional"] ["unique"] "key" name key_def ";"

foreign_key

-> "foreign" ["optional"] foreign_keydef name "references" name ";"

foreign_keydef

-> name | name "{" name { "," name } "}"

key_def

-> "{" key_field { "," key_field } "}" "on" "update" action "on" "delete" action ";"

key_field

-> name [sortorder]

sortorder

-> "asc" | "desc"

action

-> "restrict" | "cascade"

pagesize

-> "[" int "]"

field

-> type name [dimension] ";"

dimension

-> array {array} [ "variable" "by" name ]

array

-> "[" integer "]"

type

-> int_type | "signed" int_type | "unsigned" int_type | float_type | struct_type

int_type

-> "char" | "int" | "long"

float_type

-> "float" | "double"

struct_type

-> struct_head [name] "{" field {field} "}" name [dimension]

struct_head

-> "struct" | "union"

expr

-> expr "+" expr | expr "-" expr | expr "/" expr | expr "*" expr | "(" expr ")" | integer

IDENTIFICATION

Author: Thomas B. Pedersen. Copyright (c) 1994 Thomas B. Pedersen.

SEE ALSO