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98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
// $Id: text.c,v 1.21 2008/07/17 17:23:25 lynx Exp $ // vim:syntax=lpc
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//
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// the marvellous psyctext() function, fundamental of any PSYC implementation.
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//
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// this function does PSYC variable replacement for error messages
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// and informational notices as described in the internet drafts
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//
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// this code performs okay, but i would rather have it written in C and
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// linked to the driver. see also CHANGESTODO for thoughts on how to do a
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// generic template replacement C function in a way that it does psyctext()
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// effectively, but can also be used for other syntaxes.
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//
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#include <net.h>
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#include <proto.h>
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varargs string psyctext(string s, mapping m, vastring data,
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vamixed source, vastring nick) {
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string r, p, q, v;
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P3(("psyctext(%O)\n", s))
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unless(s) return "";
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if (s == "") {
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if (data) s = data;
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else return 0;
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}
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#if 0
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ASSERT("psyctext-mapping for "+ to_string(s),
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mappingp(m) && widthof(m) == 1, m)
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#else
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// easy on missing mapping
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unless (mappingp(m)) return s;
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#endif
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r="";
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while (sscanf(s, "%s[%s]%s", p, v, s) && v) {
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if (v == "_nick") r += p + (nick || m["_nick"]);
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else if (v == "_data") r += p + (data || "");
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else unless (member(m, v)) {
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if (v == "_source") r += p + UNIFORM(source);
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else {
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#ifdef _flag_debug_unresolved_psyctext
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raise_error(v +" unresolved in psyctext format\n");
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#else
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PT(("psyctext: ignoring [%s] in %O for %O\n", v,
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data, previous_object()))
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#endif
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r += p + "["+v+"]"; // pretend we havent seen it
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}
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}
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else if (stringp(m[v])) r += p + m[v];
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else if (pointerp(m[v])) { // used by showMembers
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r += p + implode(m[v], ", ");
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}
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// if (member(m,v) && m[v]) r += p + m[v];
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else if (intp(m[v])) { // used by /lu and /edit
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if (v == "_time_idle")
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r += p + timedelta(m[v]);
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else if (abbrev("_time", v))
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r += p + time_or_date(m[v]);
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else
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r += p + to_string(m[v]);
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}
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else if (mappingp(m[v])) { // made by psyc/parse
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r += p + implode(m_indices(m[v]), ", ");
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}
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else if (objectp(m[v])) r += p + psyc_name(m[v]);
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else {
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// in theory at this point we could perform
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// an inheritance search, but that's overkill.
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// instead we just bail out. for the psyc standard
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// on psyctext we will have to decide which option
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// is right: simplicity vs inheritance power. ouch.
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D1( if (v[0] == '_')
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D(S("psyctext warning: invalid %s=%O for %O\n",
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v, m[v], previous_object() || ME)); )
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r += p + "["+v+"]"; // pretend we havent seen it
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}
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}
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if (s != "") r += s;
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return r;
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}
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#if 0
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// this doesn't help detect a problem.. this MAKES the problem!
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// when the library offers a function of the same name as a method
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// defined in an inheriting class, then the inherited class will
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// execute the library function instead of finding the method in
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// the inheriting class. so when you #if 1 this, you will see that
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// person.c:w() resolves here instead of going into user.c:w().
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// evil!! -lynX
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//
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varargs void w(string mc, string data, mixed vars) {
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// oh my god seit wann gibt's denn das!?
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raise_error(sprintf("%O ended up in library/text:w(%s) for %O\n",
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previous_object(), mc, this_interactive()));
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}
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#endif
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