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Diffstat (limited to 'pkg/tbtables/tbnopen.x')
| -rw-r--r-- | pkg/tbtables/tbnopen.x | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/pkg/tbtables/tbnopen.x b/pkg/tbtables/tbnopen.x new file mode 100644 index 00000000..3c2ab128 --- /dev/null +++ b/pkg/tbtables/tbnopen.x @@ -0,0 +1,241 @@ +# 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 |