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Diffstat (limited to 'upb/bindings/lua/upb/table.c')
-rw-r--r--upb/bindings/lua/upb/table.c211
1 files changed, 0 insertions, 211 deletions
diff --git a/upb/bindings/lua/upb/table.c b/upb/bindings/lua/upb/table.c
deleted file mode 100644
index 79120c7..0000000
--- a/upb/bindings/lua/upb/table.c
+++ /dev/null
@@ -1,211 +0,0 @@
-/*
-** require("upb.table") -- a Lua extension for accessing upb_table
-**
-** This is an internal-only interface and exists for the sole purpose of
-** writing a C code generator in Lua that can dump a upb_table as static C
-** initializers. This lets us use Lua for convenient string manipulation while
-** saving us from re-implementing the upb_table hash function and hash table
-** layout / collision strategy in Lua.
-**
-** Since this is used only as part of the toolchain (and not part of the
-** runtime) we do not hold this module to the same stringent requirements as
-** the main Lua modules (for example that misbehaving Lua programs cannot
-** crash the interpreter).
-*/
-
-#include <float.h>
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lauxlib.h"
-#include "upb/bindings/lua/upb.h"
-#include "upb/def.h"
-#include "upb/structdefs.int.h"
-#include "upb/table.int.h"
-
-static void lupbtable_setnum(lua_State *L, int tab, const char *key,
- lua_Number val) {
- lua_pushnumber(L, val);
- lua_setfield(L, tab - 1, key);
-}
-
-static void lupbtable_pushval(lua_State *L, upb_tabval val, upb_ctype_t ctype) {
- switch (ctype) {
- case UPB_CTYPE_INT32:
- lua_pushnumber(L, val.val);
- break;
- case UPB_CTYPE_PTR:
- lupb_def_pushwrapper(L, (void*)val.val, NULL);
- break;
- case UPB_CTYPE_CSTR:
- lua_pushstring(L, (const char*)val.val);
- break;
- default:
- luaL_error(L, "Unexpected type: %d", ctype);
- }
-}
-
-/* Sets a few fields common to both hash table entries and arrays. */
-static void lupbtable_setmetafields(lua_State *L, int ctype, const void *ptr) {
- /* We tack this onto every entry so we know it even if the entries
- * don't stay with the table. */
- lua_pushnumber(L, ctype);
- lua_setfield(L, -2, "valtype");
-
- /* Set this to facilitate linking. */
- lua_pushlightuserdata(L, (void*)ptr);
- lua_setfield(L, -2, "ptr");
-}
-
-static void lupbtable_pushent(lua_State *L, const upb_tabent *e,
- bool inttab, int ctype) {
- lua_newtable(L);
- if (!upb_tabent_isempty(e)) {
- if (inttab) {
- lua_pushnumber(L, e->key);
- } else {
- uint32_t len;
- const char *str = upb_tabstr(e->key, &len);
- lua_pushlstring(L, str, len);
- }
- lua_setfield(L, -2, "key");
- lupbtable_pushval(L, e->val, ctype);
- lua_setfield(L, -2, "value");
- }
- lua_pushlightuserdata(L, (void*)e->next);
- lua_setfield(L, -2, "next");
- lupbtable_setmetafields(L, ctype, e);
-}
-
-/* Dumps the shared part of upb_table into a Lua table. */
-static void lupbtable_pushtable(lua_State *L, const upb_table *t, bool inttab) {
- size_t i;
-
- lua_newtable(L);
- lupbtable_setnum(L, -1, "count", t->count);
- lupbtable_setnum(L, -1, "mask", t->mask);
- lupbtable_setnum(L, -1, "ctype", t->ctype);
- lupbtable_setnum(L, -1, "size_lg2", t->size_lg2);
-
- lua_newtable(L);
- for (i = 0; i < upb_table_size(t); i++) {
- lupbtable_pushent(L, &t->entries[i], inttab, t->ctype);
- lua_rawseti(L, -2, i + 1);
- }
- lua_setfield(L, -2, "entries");
-}
-
-/* Dumps a upb_inttable to a Lua table. */
-static void lupbtable_pushinttable(lua_State *L, const upb_inttable *t) {
- size_t i;
-
- lupbtable_pushtable(L, &t->t, true);
- lupbtable_setnum(L, -1, "array_size", t->array_size);
- lupbtable_setnum(L, -1, "array_count", t->array_count);
-
- lua_newtable(L);
- for (i = 0; i < t->array_size; i++) {
- lua_newtable(L);
- if (upb_arrhas(t->array[i])) {
- lupbtable_pushval(L, t->array[i], t->t.ctype);
- lua_setfield(L, -2, "val");
- }
- lupbtable_setmetafields(L, t->t.ctype, &t->array[i]);
- lua_rawseti(L, -2, i + 1);
- }
- lua_setfield(L, -2, "array");
-}
-
-static void lupbtable_pushstrtable(lua_State *L, const upb_strtable *t) {
- lupbtable_pushtable(L, &t->t, false);
-}
-
-static int lupbtable_msgdef_itof(lua_State *L) {
- const upb_msgdef *m = lupb_msgdef_check(L, 1);
- lupbtable_pushinttable(L, &m->itof);
- return 1;
-}
-
-static int lupbtable_msgdef_ntof(lua_State *L) {
- const upb_msgdef *m = lupb_msgdef_check(L, 1);
- lupbtable_pushstrtable(L, &m->ntof);
- return 1;
-}
-
-static int lupbtable_enumdef_iton(lua_State *L) {
- const upb_enumdef *e = lupb_enumdef_check(L, 1);
- lupbtable_pushinttable(L, &e->iton);
- return 1;
-}
-
-static int lupbtable_enumdef_ntoi(lua_State *L) {
- const upb_enumdef *e = lupb_enumdef_check(L, 1);
- lupbtable_pushstrtable(L, &e->ntoi);
- return 1;
-}
-
-static int lupbtable_symtab_symtab(lua_State *L) {
- const upb_symtab *s = lupb_symtab_check(L, 1);
- lupbtable_pushstrtable(L, &s->symtab);
- return 1;
-}
-
-static void lupbtable_setfieldi(lua_State *L, const char *field, int i) {
- lua_pushnumber(L, i);
- lua_setfield(L, -2, field);
-}
-
-/* These aren't from the table, but they access other internal-only
- * definitions. */
-static int lupb_fielddef_selectorbase(lua_State *L) {
- const upb_fielddef *f = lupb_fielddef_check(L, 1);
- if (!upb_fielddef_isfrozen(f))
- luaL_error(L, "_selectorbase is only defined for frozen fielddefs");
- lua_pushinteger(L, f->selector_base);
- return 1;
-}
-
-static int lupb_msgdef_selectorcount(lua_State *L) {
- const upb_msgdef *m = lupb_msgdef_check(L, 1);
- lua_pushinteger(L, m->selector_count);
- return 1;
-}
-
-static int lupb_msgdef_submsgfieldcount(lua_State *L) {
- const upb_msgdef *m = lupb_msgdef_check(L, 1);
- lua_pushinteger(L, m->submsg_field_count);
- return 1;
-}
-
-static const struct luaL_Reg lupbtable_toplevel_m[] = {
- {"msgdef_itof", lupbtable_msgdef_itof},
- {"msgdef_ntof", lupbtable_msgdef_ntof},
- {"enumdef_iton", lupbtable_enumdef_iton},
- {"enumdef_ntoi", lupbtable_enumdef_ntoi},
- {"symtab_symtab", lupbtable_symtab_symtab},
-
- {"msgdef_selector_count", lupb_msgdef_selectorcount},
- {"msgdef_submsg_field_count", lupb_msgdef_submsgfieldcount},
-
- {"fielddef_selector_base", lupb_fielddef_selectorbase},
-
- {NULL, NULL}
-};
-
-int luaopen_upb_table_c(lua_State *L) {
- static char module_key;
- if (lupb_openlib(L, &module_key, "upb.table", lupbtable_toplevel_m)) {
- return 1;
- }
-
- /* We define these here because they are not public. */
- lupbtable_setfieldi(L, "CTYPE_PTR", UPB_CTYPE_PTR);
- lupbtable_setfieldi(L, "CTYPE_CSTR", UPB_CTYPE_CSTR);
- lupbtable_setfieldi(L, "CTYPE_INT32", UPB_CTYPE_INT32);
-
- lua_pushlightuserdata(L, NULL);
- lua_setfield(L, -2, "NULL");
-
- return 1; /* Return a single Lua value, the package table created above. */
-}
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