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authorMichael Krelin <hacker@klever.net>2013-01-26 18:00:29 (UTC)
committer Michael Krelin <hacker@klever.net>2013-02-02 12:32:37 (UTC)
commit7e4f9ebf4a76de3adafba6b32620d4610341897b (patch) (side-by-side diff)
treefb40bac449bc41241e04ddff6e9de28239ec0928 /src/seclude.h
parent98b8a37be835d50b71416acd6d285e1eb525b2a1 (diff)
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put together a minimalistic sqlite wrapper
Signed-off-by: Michael Krelin <hacker@klever.net>
Diffstat (limited to 'src/seclude.h') (more/less context) (ignore whitespace changes)
-rw-r--r--src/seclude.h124
1 files changed, 124 insertions, 0 deletions
diff --git a/src/seclude.h b/src/seclude.h
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index 0000000..cab3699
--- a/dev/null
+++ b/src/seclude.h
@@ -0,0 +1,124 @@
+#ifndef __SECLUDE_H
+#define __SECLUDE_H
+
+#include <sqlite3.h>
+#include <stdexcept>
+#include <tr1/memory>
+#include <cstdarg>
+
+namespace seclude {
+ using std::tr1::shared_ptr;
+
+ static struct sql_null_type { } sql_null;
+
+
+ struct sqlite3_error : public std::runtime_error {
+ int code, ecode;
+ sqlite3_error(sqlite3 *s,const std::string& m)
+ : std::runtime_error(m+": "+(s?sqlite3_errmsg(s):"unknown error")),
+ code(s?sqlite3_errcode(s):-1), ecode(s?sqlite3_extended_errcode(s):-1) { }
+ sqlite3_error(sqlite3_stmt *s,const std::string& m)
+ : std::runtime_error(m+": "+(s?sqlite3_errmsg(sqlite3_db_handle(s)):"unknown error")),
+ code(s?sqlite3_errcode(sqlite3_db_handle(s)):-1),
+ ecode(s?sqlite3_extended_errcode(sqlite3_db_handle(s)):-1) { }
+ };
+
+
+ static void sqlite3_stmt_deleter(sqlite3_stmt* s) { s && sqlite3_finalize(s); }
+ struct stmt_t : public shared_ptr<sqlite3_stmt> {
+ stmt_t(sqlite3_stmt *s) : shared_ptr<sqlite3_stmt>(s,sqlite3_stmt_deleter) { }
+
+ bool step() {
+ switch(sqlite3_step(get())) {
+ case SQLITE_DONE: return false;
+ case SQLITE_ROW: return true;
+ }
+ panic("failed to sqlite3_step()");
+ }
+ stmt_t& reset() {
+ return worry(sqlite3_reset(get()),"failed to sqlite3_reset()");
+ }
+ stmt_t& clear_bindings() {
+ return worry(sqlite3_clear_bindings(get()),"failed to sqlite3_clear_bindings()");
+ }
+ int data_count() { return sqlite3_data_count(get()); }
+ int column_count() { return sqlite3_column_count(get()); }
+ template<typename T> T column(int i);
+ std::string column_name(int i) { return sqlite3_column_name(get(),i); }
+ int column_type(int i) { return sqlite3_column_type(get(),i); }
+ bool is_column_null(int i) { return column_type(i)==SQLITE_NULL; }
+
+ template<typename T> int bind_(int i,T v);
+ template<typename T>
+ stmt_t& bind(int i,T v) {
+ return worry(bind_(i,v),"failed to perform binding");
+ }
+ template<typename T>
+ stmt_t& bind(const char *n,T v) { return bind(bind_parameter_index(n),v); }
+ int bind_parameter_index(const char *n) {
+ int rv = sqlite3_bind_parameter_index(get(),n);
+ if(!rv) throw std::invalid_argument("failed to sqlite3_bind_parameter_index()");
+ return rv;
+ }
+
+
+ stmt_t& worry(int c,const char *m) { if(c!=SQLITE_OK) panic(m); return *this;}
+ stmt_t& panic(const std::string& m) { throw sqlite3_error(get(),m); return *this;}
+ };
+
+ template<> inline int stmt_t::bind_<int>(int i,int v) {
+ return sqlite3_bind_int(get(),i,v); }
+ template<> inline int stmt_t::bind_<long>(int i,long v) {
+ return sqlite3_bind_int64(get(),i,v); }
+ template<> inline int stmt_t::bind_<sqlite3_int64>(int i,sqlite3_int64 v) {
+ return sqlite3_bind_int64(get(),i,v); }
+ template<> inline int stmt_t::bind_<double>(int i,double v) {
+ return sqlite3_bind_double(get(),i,v); }
+ template<> inline int stmt_t::bind_<const std::string&>(int i,const std::string& v) {
+ return sqlite3_bind_text(get(),i,v.c_str(),-1,SQLITE_TRANSIENT); }
+ template<> inline int stmt_t::bind_<std::string>(int i,std::string v) {
+ return sqlite3_bind_text(get(),i,v.c_str(),-1,SQLITE_TRANSIENT); }
+ template<> inline int stmt_t::bind_<const char *>(int i,const char *v) {
+ return sqlite3_bind_text(get(),i,v,-1,SQLITE_TRANSIENT); }
+ template<> inline int stmt_t::bind_<sql_null_type>(int i,sql_null_type) {
+ return sqlite3_bind_null(get(),i); }
+
+ template<> int stmt_t::column<int>(int i) { return sqlite3_column_int(get(),i); }
+ template<> long stmt_t::column<long>(int i) { return sqlite3_column_int64(get(),i); }
+ template<> sqlite3_int64 stmt_t::column<sqlite3_int64>(int i) { return sqlite3_column_int64(get(),i); }
+ template<> double stmt_t::column<double>(int i) { return sqlite3_column_double(get(),i); }
+ template<> std::string stmt_t::column<std::string>(int i) { return (const char*)sqlite3_column_text(get(),i); }
+
+
+ static void sqlite3_deleter(sqlite3* s) { s && sqlite3_close(s); }
+ struct db_t : public shared_ptr<sqlite3> {
+ db_t(const char *f) {
+ sqlite3 *s=0;
+ int c = sqlite3_open(f,&s);
+ reset(s,sqlite3_deleter);
+ worry(c,"failed to sqlite3_open()");
+ }
+
+ void exec(const char *s) {
+ char *e = 0;
+ int c = sqlite3_exec(get(),s,NULL,NULL,&e);
+ if(e) sqlite3_free(e);
+ worry(c,"failed to sqlite3_exec()");
+ }
+
+ stmt_t prepare(const char *s) {
+ sqlite3_stmt *r=0;
+ int c = sqlite3_prepare(get(),s,-1,&r,0);
+ stmt_t rv(r);
+ worry(c,"failed to sqlite3_prepare()");
+ return rv;
+ }
+
+ int changes() { return sqlite3_changes(get()); }
+
+ void worry(int c,const char *m) { if(c!=SQLITE_OK) throw sqlite3_error(get(),m); }
+ };
+
+}
+
+#endif /* __SECLUDE_H */