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/* -----------------------------------------------------------------------------
* This file is part of SWIG, which is licensed as a whole under version 3
* (or any later version) of the GNU General Public License. Some additional
* terms also apply to certain portions of SWIG. The full details of the SWIG
* license and copyrights can be found in the LICENSE and COPYRIGHT files
* included with the SWIG source code as distributed by the SWIG developers
* and at https://www.swig.org/legal.html.
*
* fragment.c
*
* This file manages named code fragments. Code fragments are typically
* used to hold helper-code that may or may not be included in the wrapper
* file (depending on what features are actually used in the interface).
*
* By using fragments, it's possible to greatly reduce the amount of
* wrapper code and to generate cleaner wrapper files.
* ----------------------------------------------------------------------------- */
#include "swig.h"
#include "swigwarn.h"
#include "cparse.h"
static Hash *fragments = 0;
static Hash *looking_fragments = 0;
static int debug = 0;
/* -----------------------------------------------------------------------------
* Swig_fragment_register()
*
* Add a fragment. Use the original Node*, so, if something needs to be
* changed, lang.cxx doesn't need to be touched again.
* ----------------------------------------------------------------------------- */
void Swig_fragment_register(Node *fragment) {
if (Getattr(fragment, "emitonly")) {
Swig_fragment_emit(fragment);
return;
} else {
String *name = Copy(Getattr(fragment, "value"));
String *type = Getattr(fragment, "type");
if (type) {
SwigType *rtype = SwigType_typedef_resolve_all(type);
String *mangle = Swig_string_mangle(type);
Append(name, mangle);
Delete(mangle);
Delete(rtype);
if (debug)
Printf(stdout, "register fragment %s %s\n", name, type);
}
if (!fragments) {
fragments = NewHash();
}
if (!Getattr(fragments, name)) {
String *section = Copy(Getattr(fragment, "section"));
String *ccode = Copy(Getattr(fragment, "code"));
Hash *kwargs = Getattr(fragment, "kwargs");
Setmeta(ccode, "section", section);
if (kwargs) {
Setmeta(ccode, "kwargs", kwargs);
}
Setfile(ccode, Getfile(fragment));
Setline(ccode, Getline(fragment));
/* Replace $descriptor() macros */
Swig_cparse_replace_descriptor(ccode);
Setattr(fragments, name, ccode);
if (debug)
Printf(stdout, "registering fragment %s %s\n", name, section);
Delete(section);
Delete(ccode);
}
Delete(name);
}
}
/* -----------------------------------------------------------------------------
* Swig_fragment_emit()
*
* Emit a fragment
* ----------------------------------------------------------------------------- */
static
char *char_index(char *str, char c) {
while (*str && (c != *str))
++str;
return (c == *str) ? str : 0;
}
void Swig_fragment_emit(Node *n) {
String *code;
char *pc, *tok;
String *t;
String *mangle = 0;
String *name = 0;
String *type = 0;
name = Getattr(n, "value");
if (!name) {
name = n;
}
if (!fragments) {
Swig_warning(WARN_FRAGMENT_NOT_FOUND, Getfile(n), Getline(n), "Fragment '%s' not found.\n", name);
return;
}
type = Getattr(n, "type");
if (type) {
mangle = Swig_string_mangle(type);
}
if (debug)
Printf(stdout, "looking fragment %s %s\n", name, type);
t = Copy(name);
tok = Char(t);
pc = char_index(tok, ',');
if (pc)
*pc = 0;
while (tok) {
String *name = NewString(tok);
if (mangle)
Append(name, mangle);
if (looking_fragments && Getattr(looking_fragments, name)) {
return;
}
code = Getattr(fragments, name);
if (debug)
Printf(stdout, "looking subfragment %s\n", name);
if (code && (Strcmp(code, "ignore") != 0)) {
String *section = Getmeta(code, "section");
Hash *nn = Getmeta(code, "kwargs");
if (!looking_fragments)
looking_fragments = NewHash();
Setattr(looking_fragments, name, "1");
while (nn) {
if (Equal(Getattr(nn, "name"), "fragment")) {
if (debug)
Printf(stdout, "emitting fragment %s %s\n", nn, type);
Setfile(nn, Getfile(n));
Setline(nn, Getline(n));
Swig_fragment_emit(nn);
}
nn = nextSibling(nn);
}
if (section) {
File *f = Swig_filebyname(section);
if (!f) {
Swig_error(Getfile(code), Getline(code), "Bad section '%s' in %%fragment declaration for code fragment '%s'\n", section, name);
} else {
if (debug)
Printf(stdout, "emitting subfragment %s %s\n", name, section);
if (debug)
Printf(f, "/* begin fragment %s */\n", name);
Printf(f, "%s\n", code);
if (debug)
Printf(f, "/* end fragment %s */\n\n", name);
Setattr(fragments, name, "ignore");
Delattr(looking_fragments, name);
}
}
} else if (!code && type) {
SwigType *rtype = SwigType_typedef_resolve_all(type);
if (!Equal(type, rtype)) {
String *name = Copy(Getattr(n, "value"));
String *mangle = Swig_string_mangle(type);
Append(name, mangle);
Setfile(name, Getfile(n));
Setline(name, Getline(n));
Swig_fragment_emit(name);
Delete(mangle);
Delete(name);
}
Delete(rtype);
}
if (!code) {
Swig_warning(WARN_FRAGMENT_NOT_FOUND, Getfile(n), Getline(n), "Fragment '%s' not found.\n", name);
}
tok = pc ? pc + 1 : 0;
if (tok) {
pc = char_index(tok, ',');
if (pc)
*pc = 0;
}
Delete(name);
}
Delete(t);
}
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