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# Table name template package, copied from the image template package imt.x.
#
# tnt = tbnopen (template)
# tnt = tbnopenp (clparam)
# tbnclose (tnt)
# nchars|EOF = tbnget (tnt, table, maxch)
# len = tbnlen (tnt)
# tbnrew (tnt)
#
# Phil Hodge, 8-Sep-1995 Copied from imt.x, names changed.
define SZ_FNT 512
define CH_DELIM 20B # used to flag brackets
# TBNOPENP -- Open a table name template obtained as the string value of a CL
# parameter.
pointer procedure tbnopenp (param)
char param[ARB] # i: CL parameter with string value template
#--
pointer sp, template, tnt
pointer tbnopen()
errchk clgstr
begin
call smark (sp)
call salloc (template, SZ_LINE, TY_CHAR)
call clgstr (param, Memc[template], SZ_LINE)
tnt = tbnopen (Memc[template])
call sfree (sp)
return (tnt)
end
# TBNOPEN -- Open a table name template.
pointer procedure tbnopen (template)
char template[ARB] # i: table name template
#--
int sort, level, ip, ch
pointer sp, listp, fnt, op
define output {Memc[op]=$1;op=op+1}
int fntopnb(), strlen()
begin
call smark (sp)
call salloc (fnt, strlen(template)*12/10 + SZ_FNT, TY_CHAR)
# Sorting is disabled as input and output templates, derived from the
# same database but with string editing used to modify the output list,
# may be sorted differently as sorting is performed upon the edited
# output list.
sort = NO
op = fnt
for (ip=1; template[ip] != EOS; ip=ip+1) {
ch = template[ip]
if (ch == '[') {
if (ip > 1 && template[ip-1] == '!') {
# ![ -- Pass a [ to FNT (character class notation).
Memc[op-1] = '['
} else if (ip > 1 && template[ip-1] == '\\') {
# \[ -- The [ is part of the filename. Pass it on as an
# escape sequence to get by the FNT.
output ('[')
} else {
# [ -- Unescaped [. This marks the beginning of an
# extension name. Output `%%[...]%' and escape all
# pattern matching metacharacters until a comma template
# delimiter is encountered. Note that a comma within []
# is not a template delimiter.
output ('%')
output ('%')
output (CH_DELIM)
level = 0
for (; template[ip] != EOS; ip=ip+1) {
ch = template[ip]
if (ch == ',') { # ,
if (level <= 0)
break # exit loop
else {
output ('\\')
output (ch)
}
} else if (ch == '[') { # [
output ('\\')
output (ch)
level = level + 1
} else if (ch == ']') { # ]
output (ch)
level = level - 1
} else if (ch == '*') { # *
output ('\\')
output (ch)
} else { # normal chars
output (ch)
}
}
output ('%')
ip = ip - 1
}
} else if (ch == '@') {
# List file reference. Output the CH_DELIM code before the @
# to prevent further translations on the table names
# returned from the list file, e.g., "CH_DELIM // @listfile".
output (CH_DELIM)
output ('/')
output ('/')
output (ch)
} else {
output (ch)
}
}
Memc[op] = EOS
listp = fntopnb (Memc[fnt], sort)
call sfree (sp)
return (listp)
end
# TBNGET -- Get the next table name from the expanded list.
# EOF is returned if there are no more names.
int procedure tbnget (tnt, outstr, maxch)
pointer tnt # i: table template descriptor
char outstr[ARB] # o: output string
int maxch # i: max chars out
#--
int nchars
pointer sp, buf
int fntgfnb(), tbn_mapname()
errchk fntgfnb
begin
call smark (sp)
call salloc (buf, SZ_PATHNAME, TY_CHAR)
if (fntgfnb (tnt, Memc[buf], SZ_PATHNAME) == EOF) {
outstr[1] = EOS
call sfree (sp)
return (EOF)
}
nchars = tbn_mapname (Memc[buf], outstr, maxch)
call sfree (sp)
return (nchars)
end
# TBNLEN -- Return the number of table names in the expanded list.
int procedure tbnlen (tnt)
pointer tnt # i: table name template descriptor
#--
int fntlenb()
begin
return (fntlenb (tnt))
end
# TBNREW -- Rewind the expanded table name list.
procedure tbnrew (tnt)
pointer tnt # i: table name template descriptor
begin
call fntrewb (tnt)
end
# TBNCLOSE -- Close a table name template.
procedure tbnclose (tnt)
pointer tnt # io: table name template descriptor
begin
call fntclsb (tnt)
end
# TBN_MAPNAME -- Translate the string returned by FNT into a table
# specification suitable for input to the table I/O routines.
int procedure tbn_mapname (fnt, outstr, maxch)
char fnt[ARB] # i: FNT string
char outstr[ARB] # o: output string
int maxch
int ip, op
begin
op = 1
for (ip=1; fnt[ip] != EOS; ip=ip+1) {
if (fnt[ip] == '[') {
outstr[op] = '\\'
op = op + 1
outstr[op] = '['
op = op + 1
} else if (fnt[ip] == CH_DELIM) {
for (ip=ip+1; fnt[ip] != EOS; ip=ip+1) {
outstr[op] = fnt[ip]
op = op + 1
if (op > maxch)
break
}
break
} else {
outstr[op] = fnt[ip]
op = op + 1
if (op > maxch)
break
}
}
outstr[op] = EOS
return (op - 1)
end
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