mirror of
https://github.com/MariaDB/server.git
synced 2025-01-22 14:54:20 +01:00
133 lines
5.7 KiB
C
133 lines
5.7 KiB
C
/* Make a db.h that will be link-time compatible with Sleepycat's Berkeley DB. */
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#include <db.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#define DECL_LIMIT 100
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#define FIELD_LIMIT 100
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struct fieldinfo {
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char decl[DECL_LIMIT];
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unsigned int off;
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unsigned int size;
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} fields[FIELD_LIMIT];
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int field_counter=0;
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int compare_fields (const void *av, const void *bv) {
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const struct fieldinfo *a = av;
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const struct fieldinfo *b = bv;
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if (a->off < b->off) return -1;
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if (a->off > b->off) return 1;
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return 0;
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}
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#define STRUCT_SETUP(typ, name, fstring) ({ snprintf(fields[field_counter].decl, DECL_LIMIT, fstring, #name); \
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fields[field_counter].off = __builtin_offsetof(typ, name); \
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{ typ dummy; \
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fields[field_counter].size = sizeof(dummy.name); } \
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field_counter++; })
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FILE *outf;
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void open_file (void) {
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char fname[100];
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snprintf(fname, 100, "sample_offsets_%d.h", __WORDSIZE);
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outf = fopen(fname, "w");
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assert(outf);
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}
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void sort_and_dump_fields (const char *structname, unsigned int sizeofstruct) {
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int i;
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qsort(fields, field_counter, sizeof(fields[0]), compare_fields);
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fprintf(outf, "struct fieldinfo %s_fields%d[] = {\n", structname, __WORDSIZE);
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for (i=0; i<field_counter; i++) {
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fprintf(outf, " {\"%s\", %d, %d},\n", fields[i].decl, fields[i].off, fields[i].size);
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}
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fprintf(outf, " {0, 0, %d} /* size of whole struct */\n", sizeofstruct);
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fprintf(outf, "};\n");
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}
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void sample_db_offsets (void) {
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/* Do these in alphabetical order. */
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field_counter=0;
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STRUCT_SETUP(DB,app_private, "void *%s");
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STRUCT_SETUP(DB,close, "int (*%s) (DB*, u_int32_t)");
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STRUCT_SETUP(DB,cursor, "int (*%s) (DB *, DB_TXN *, DBC **, u_int32_t)");
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STRUCT_SETUP(DB,del, "int (*%s) (DB *, DB_TXN *, DBT *, u_int32_t)");
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STRUCT_SETUP(DB,get, "int (*%s) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)");
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STRUCT_SETUP(DB,key_range, "int (*%s) (DB *, DB_TXN *, DBT *, DB_KEY_RANGE *, u_int32_t)");
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STRUCT_SETUP(DB,open, "int (*%s) (DB *, DB_TXN *, const char *, const char *, DBTYPE, u_int32_t, int)");
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STRUCT_SETUP(DB,put, "int (*%s) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)");
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STRUCT_SETUP(DB,remove, "int (*%s) (DB *, const char *, const char *, u_int32_t)");
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STRUCT_SETUP(DB,rename, "int (*%s) (DB *, const char *, const char *, const char *, u_int32_t)");
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STRUCT_SETUP(DB,set_bt_compare, "int (*%s) (DB *, int (*)(DB *, const DBT *, const DBT *))");
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STRUCT_SETUP(DB,set_flags, "int (*%s) (DB *, u_int32_t)");
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STRUCT_SETUP(DB,stat, "int (*%s) (DB *, void *, u_int32_t)");
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sort_and_dump_fields("db", sizeof(DB));
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}
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void sample_dbt_offsets (void) {
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field_counter=0;
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STRUCT_SETUP(DBT,app_private, "void*%s");
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STRUCT_SETUP(DBT,data, "void*%s");
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STRUCT_SETUP(DBT,flags, "u_int32_t %s");
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STRUCT_SETUP(DBT,size, "u_int32_t %s");
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STRUCT_SETUP(DBT,ulen, "u_int32_t %s");
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sort_and_dump_fields("dbt", sizeof(DBT));
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}
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void sample_db_txn_offsets (void) {
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field_counter=0;
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STRUCT_SETUP(DB_TXN, commit, "int (*%s) (DB_TXN*, u_int32_t)");
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STRUCT_SETUP(DB_TXN, id, "u_int32_t (*%s) (DB_TXN *)");
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sort_and_dump_fields("db_txn", sizeof(DB_TXN));
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}
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void sample_dbc_offsets (void) {
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field_counter=0;
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STRUCT_SETUP(DBC, c_close, "int (*%s) (DBC *)");
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STRUCT_SETUP(DBC, c_del, "int (*%s) (DBC *, u_int32_t)");
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STRUCT_SETUP(DBC, c_get, "int (*%s) (DBC *, DBT *, DBT *, u_int32_t)");
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sort_and_dump_fields("dbc", sizeof(DBC));
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}
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void sample_db_env_offsets (void) {
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field_counter=0;
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STRUCT_SETUP(DB_ENV, close, "int (*%s) (DB_ENV *, u_int32_t)");
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STRUCT_SETUP(DB_ENV, err, "void (*%s) (const DB_ENV *, int, const char *, ...)");
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STRUCT_SETUP(DB_ENV, log_archive, "int (*%s) (DB_ENV *, char **[], u_int32_t)");
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STRUCT_SETUP(DB_ENV, log_flush, "int (*%s) (DB_ENV *, const DB_LSN *)");
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STRUCT_SETUP(DB_ENV, open, "int (*%s) (DB_ENV *, const char *, u_int32_t, int)");
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STRUCT_SETUP(DB_ENV, set_cachesize, "int (*%s) (DB_ENV *, u_int32_t, u_int32_t, int)");
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STRUCT_SETUP(DB_ENV, set_data_dir, "int (*%s) (DB_ENV *, const char *)");
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STRUCT_SETUP(DB_ENV, set_errcall, "void (*%s) (DB_ENV *, void (*)(const char *, char *))");
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STRUCT_SETUP(DB_ENV, set_errpfx, "void (*%s) (DB_ENV *, const char *)");
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STRUCT_SETUP(DB_ENV, set_flags, "int (*%s) (DB_ENV *, u_int32_t, int)");
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STRUCT_SETUP(DB_ENV, set_lg_bsize, "int (*%s) (DB_ENV *, u_int32_t)");
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STRUCT_SETUP(DB_ENV, set_lg_dir, "int (*%s) (DB_ENV *, const char *)");
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STRUCT_SETUP(DB_ENV, set_lg_max, "int (*%s) (DB_ENV *, u_int32_t)");
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STRUCT_SETUP(DB_ENV, set_lk_detect, "int (*%s) (DB_ENV *, u_int32_t)");
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STRUCT_SETUP(DB_ENV, set_lk_max, "int (*%s) (DB_ENV *, u_int32_t)");
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STRUCT_SETUP(DB_ENV, set_noticecall, "void (*%s) (DB_ENV *, void (*)(DB_ENV *, db_notices))");
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STRUCT_SETUP(DB_ENV, set_tmp_dir, "int (*%s) (DB_ENV *, const char *)");
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STRUCT_SETUP(DB_ENV, set_verbose, "int (*%s) (DB_ENV *, u_int32_t, int)");
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STRUCT_SETUP(DB_ENV, txn_checkpoint, "int (*%s) (DB_ENV *, u_int32_t, u_int32_t, u_int32_t)");
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STRUCT_SETUP(DB_ENV, txn_stat, "int (*%s) (DB_ENV *, DB_TXN_STAT **, u_int32_t)");
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sort_and_dump_fields("db_env", sizeof(DB_ENV));
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}
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int main (int argc __attribute__((__unused__)), char *argv[] __attribute__((__unused__))) {
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open_file();
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fprintf(outf, "/* BDB offsets on a %d-bit machine */\n", __WORDSIZE);
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sample_db_offsets();
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sample_dbt_offsets();
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sample_db_txn_offsets();
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sample_dbc_offsets();
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sample_db_env_offsets();
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return 0;
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}
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