mirror of
https://github.com/MariaDB/server.git
synced 2025-01-22 14:54:20 +01:00
73 lines
2.8 KiB
C
73 lines
2.8 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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DB db_dummy;
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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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} db_fields[FIELD_LIMIT];
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int db_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 DB_STRUCT_SETUP(name, fstring) ({ snprintf(db_fields[db_field_counter].decl, DECL_LIMIT, fstring, #name); \
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db_fields[db_field_counter].off = offsetof(DB, name); \
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db_fields[db_field_counter].size = sizeof(db_dummy.name); \
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db_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 sample_offsets (void) {
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int i;
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/* Do these in alphabetical order. */
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DB_STRUCT_SETUP(app_private, "void *%s");
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DB_STRUCT_SETUP(close, "int (*%s) (DB*, u_int32_t)");
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DB_STRUCT_SETUP(cursor, "int (*%s) (DB *, DB_TXN *, DBC **, u_int32_t)");
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DB_STRUCT_SETUP(del, "int (*%s) (DB *, DB_TXN *, DBT *, u_int32_t)");
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DB_STRUCT_SETUP(get, "int (*%s) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)");
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DB_STRUCT_SETUP(key_range, "int (*%s) (DB *, DB_TXN *, DBT *, DB_KEY_RANGE *, u_int32_t)");
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DB_STRUCT_SETUP(open, "int (*%s) (DB *, DB_TXN *, const char *, const char *, DBTYPE, u_int32_t, int)");
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DB_STRUCT_SETUP(put, "int (*%s) (DB *, DB_TXN *, DBT *, DBT *, u_int32_t)");
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DB_STRUCT_SETUP(remove, "int (*%s) (DB *, const char *, const char *, u_int32_t)");
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DB_STRUCT_SETUP(rename, "int (*%s) (DB *, const char *, const char *, const char *, u_int32_t)");
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DB_STRUCT_SETUP(set_bt_compare, "int (*%s) (DB *, int (*)(DB *, const DBT *, const DBT *))");
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DB_STRUCT_SETUP(set_flags, "int (*%s) (DB *, u_int32_t)");
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DB_STRUCT_SETUP(stat, "int (*%s) (DB *, void *, u_int32_t)");
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qsort(db_fields, db_field_counter, sizeof(db_fields[0]), compare_fields);
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fprintf(outf, "struct fieldinfo fields%d[] = {\n", __WORDSIZE);
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for (i=0; i<db_field_counter; i++) {
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fprintf(outf, " {\"%s\", %d, %d}", db_fields[i].decl, db_fields[i].off, db_fields[i].size);
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if (i+1<db_field_counter) fprintf(outf, ",");
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fprintf(outf, "\n");
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}
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fprintf(outf, "};\n");
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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_offsets();
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return 0;
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}
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