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fb.c
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fb.c
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/*
* fb.c
* A module to access the Firebird database from Ruby.
* Fork of interbase.c to fb.c by Brent Rowland.
* All changes, improvements and associated bugs Copyright (C) 2006 Brent Rowland and Target Training International.
* License to all changes, improvements and bugs is granted under the same terms as the original and/or
* the Ruby license, whichever is most applicable.
* Based on interbase.c
*
* Copyright (C) 1999 by NaCl inc.
* Copyright (C) 1997,1998 by RIOS Corporation
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notice appear in all copies.
* RIOS Corporation makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty. By use of this software the user agrees to
* indemnify and hold harmless RIOS Corporation from any claims or
* liability for loss arising out of such use.
*/
#include "ruby.h"
#ifdef HAVE_RUBY_REGEX_H
# include "ruby/re.h"
#else
# include "re.h"
#endif
// this sucks. but for some reason these moved around between 1.8 and 1.9
#ifdef ONIGURUMA_H
#define IGNORECASE ONIG_OPTION_IGNORECASE
#else
#define IGNORECASE RE_OPTION_IGNORECASE
#endif
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <ibase.h>
#include <float.h>
#include <time.h>
#define SQLDA_COLSINIT 50
#define SQLCODE_NOMORE 100
#define TPBBUFF_ALLOC 64
#define CMND_DELIMIT " \t\n\r\f"
#define LIST_DELIMIT ", \t\n\r\f"
#define META_NAME_MAX 31
/* Statement type */
#define STATEMENT_DDL 1
#define STATEMENT_DML 0
/* Execute process flag */
#define EXECF_EXECDML 0
#define EXECF_SETPARM 1
static VALUE rb_mFb;
static VALUE rb_cFbDatabase;
static VALUE rb_cFbConnection;
static VALUE rb_cFbCursor;
static VALUE rb_cFbSqlType;
/* static VALUE rb_cFbGlobal; */
static VALUE rb_eFbError;
static VALUE rb_sFbField;
static VALUE rb_sFbIndex;
static VALUE rb_sFbColumn;
static VALUE rb_cDate;
static ID id_matches;
static ID id_downcase_bang;
static VALUE re_lowercase;
static ID id_rstrip_bang;
static ID id_sub_bang;
static ID id_force_encoding;
/* static char isc_info_stmt[] = { isc_info_sql_stmt_type }; */
/* static char isc_info_buff[16]; */
static char isc_tpb_0[] = {
isc_tpb_version1, isc_tpb_write,
isc_tpb_concurrency, isc_tpb_nowait
};
/* structs */
/* DB handle and TR parameter block list structure */
typedef struct
{
isc_db_handle *dbb_ptr ;
long tpb_len ;
char *tpb_ptr ;
} ISC_TEB ; /* transaction existence block */
/* InterBase varchar structure */
typedef struct
{
short vary_length;
char vary_string[1];
} VARY;
struct FbConnection {
isc_db_handle db; /* DB handle */
isc_tr_handle transact; /* transaction handle */
VALUE cursor;
unsigned short dialect;
unsigned short db_dialect;
short downcase_names;
VALUE encoding;
int dropped;
ISC_STATUS isc_status[20];
/* struct FbConnection *next; */
};
/* static struct FbConnection *fb_connection_list; */
struct FbCursor {
int open;
int eof;
isc_tr_handle auto_transact;
isc_stmt_handle stmt;
XSQLDA *i_sqlda;
XSQLDA *o_sqlda;
char *i_buffer;
long i_buffer_size;
char *o_buffer;
long o_buffer_size;
VALUE fields_ary;
VALUE fields_hash;
VALUE connection;
};
typedef struct trans_opts
{
const char *option1;
const char *option2;
char optval;
short position;
struct trans_opts *sub_opts;
} trans_opts;
/* global utilities */
#define FB_ALIGN(n, b) ((n + b - 1) & ~(b - 1))
#define UPPER(c) (((c) >= 'a' && (c)<= 'z') ? (c) - 'a' + 'A' : (c))
#define FREE(p) if (p) { xfree(p); p = 0; }
#define SETNULL(p) if (p && strlen(p) == 0) { p = 0; }
// #define HERE(s) printf("%s\n", s)
#define HERE(s)
static long calculate_buffsize(XSQLDA *sqlda)
{
XSQLVAR *var;
long cols;
short dtp;
long offset = 0;
long alignment;
long length;
long count;
cols = sqlda->sqld;
var = sqlda->sqlvar;
for (count = 0; count < cols; var++,count++) {
length = alignment = var->sqllen;
dtp = var->sqltype & ~1;
if (dtp == SQL_TEXT) {
alignment = 1;
} else if (dtp == SQL_VARYING) {
length += sizeof(short);
alignment = sizeof(short);
}
offset = FB_ALIGN(offset, alignment);
offset += length;
offset = FB_ALIGN(offset, sizeof(short));
offset += sizeof(short);
}
return offset + sizeof(short);
}
#if (FB_API_VER >= 20)
static VALUE fb_error_msg(const ISC_STATUS *isc_status)
{
char msg[1024];
VALUE result = rb_str_new(NULL, 0);
while (fb_interpret(msg, 1024, &isc_status))
{
result = rb_str_cat(result, msg, strlen(msg));
result = rb_str_cat(result, "\n", strlen("\n"));
}
return result;
}
#else
static VALUE fb_error_msg(ISC_STATUS *isc_status)
{
char msg[1024];
VALUE result = rb_str_new(NULL, 0);
while (isc_interprete(msg, &isc_status))
{
result = rb_str_cat(result, msg, strlen(msg));
result = rb_str_cat(result, "\n", strlen("\n"));
}
return result;
}
#endif
struct time_object {
struct timeval tv;
struct tm tm;
int gmt;
int tm_got;
};
#define GetTimeval(obj, tobj) \
Data_Get_Struct(obj, struct time_object, tobj)
static VALUE fb_mktime(struct tm *tm, const char *which)
{
#if defined(_WIN32)
if (tm->tm_year + 1900 < 1970)
{
tm->tm_year = 70;
tm->tm_mon = 0;
tm->tm_mday = 1;
tm->tm_hour = 0;
tm->tm_min = 0;
tm->tm_sec = 0;
}
#endif
#if defined(_LP64) || defined(__LP64__) || defined(__arch64__)
// No need to floor time on 64-bit Unix.
#else
if (tm->tm_year + 1900 < 1902)
{
tm->tm_year = 2;
tm->tm_mon = 0;
tm->tm_mday = 1;
tm->tm_hour = 0;
tm->tm_min = 0;
tm->tm_sec = 0;
}
#endif
return rb_funcall(
rb_cTime, rb_intern(which), 6,
INT2FIX(tm->tm_year + 1900), INT2FIX(tm->tm_mon + 1), INT2FIX(tm->tm_mday),
INT2FIX(tm->tm_hour), INT2FIX(tm->tm_min), INT2FIX(tm->tm_sec));
}
static VALUE fb_mkdate(struct tm *tm)
{
return rb_funcall(
rb_cDate, rb_intern("civil"), 3,
INT2FIX(1900 + tm->tm_year), INT2FIX(tm->tm_mon + 1), INT2FIX(tm->tm_mday));
}
static int responds_like_date(VALUE obj)
{
return rb_respond_to(obj, rb_intern("year")) &&
rb_respond_to(obj, rb_intern("month")) &&
rb_respond_to(obj, rb_intern("day"));
}
static void tm_from_date(struct tm *tm, VALUE date)
{
VALUE year, month, day;
if (!responds_like_date(date)) {
VALUE s = rb_funcall(date, rb_intern("to_s"), 0);
date = rb_funcall(rb_cDate, rb_intern("parse"), 1, s);
}
year = rb_funcall(date, rb_intern("year"), 0);
month = rb_funcall(date, rb_intern("month"), 0);
day = rb_funcall(date, rb_intern("day"), 0);
memset(tm, 0, sizeof(struct tm));
tm->tm_year = FIX2INT(year) - 1900;
tm->tm_mon = FIX2INT(month) - 1;
tm->tm_mday = FIX2INT(day);
}
static void tm_from_timestamp(struct tm *tm, VALUE obj)
{
#ifdef TypedData_Get_Struct
VALUE year, month, day, hour, min, sec;
#else
struct time_object *tobj;
#endif
if (!rb_obj_is_kind_of(obj, rb_cTime))
{
if (rb_respond_to(obj, rb_intern("to_str")))
{
VALUE s = rb_funcall(obj, rb_intern("to_str"), 0);
obj = rb_funcall(rb_cTime, rb_intern("parse"), 1, s);
}
else
{
rb_raise(rb_eTypeError, "Expecting Time object or string.");
}
}
#ifdef TypedData_Get_Struct
year = rb_funcall(obj, rb_intern("year"), 0);
month = rb_funcall(obj, rb_intern("month"), 0);
day = rb_funcall(obj, rb_intern("day"), 0);
hour = rb_funcall(obj, rb_intern("hour"), 0);
min = rb_funcall(obj, rb_intern("min"), 0);
sec = rb_funcall(obj, rb_intern("sec"), 0);
memset(tm, 0, sizeof(struct tm));
tm->tm_year = FIX2INT(year) - 1900;
tm->tm_mon = FIX2INT(month) - 1;
tm->tm_mday = FIX2INT(day);
tm->tm_hour = FIX2INT(hour);
tm->tm_min = FIX2INT(min);
tm->tm_sec = FIX2INT(sec);
#else
GetTimeval(obj, tobj);
*tm = tobj->tm;
#endif
}
static VALUE object_to_fixnum(VALUE object)
{
if (TYPE(object) != T_FIXNUM && TYPE(object) != T_BIGNUM)
{
if (TYPE(object) == T_FLOAT || !strcmp(rb_class2name(CLASS_OF(object)), "BigDecimal"))
object = rb_funcall(object, rb_intern("round"), 0);
else if (TYPE(object) == T_STRING)
object = rb_funcall(rb_funcall(rb_mKernel, rb_intern("BigDecimal"), 1, object), rb_intern("round"), 0);
else if (!strcmp(rb_class2name(CLASS_OF(object)), "Time"))
rb_raise(rb_eTypeError, "Time value not allowed as Integer");
else if (rb_respond_to(object, rb_intern("to_i")))
object = rb_funcall(object, rb_intern("to_i"), 0);
else
rb_raise(rb_eTypeError, "Value doesn't respond to 'to_i' for conversion");
}
return (object);
}
static VALUE double_from_obj(VALUE obj)
{
if (TYPE(obj) == T_STRING)
{
obj = rb_funcall(obj, rb_intern("to_f"), 0);
}
return obj;
}
static VALUE fb_sql_type_from_code(int code, int subtype)
{
const char *sql_type = NULL;
switch(code) {
case SQL_TEXT:
case blr_text:
sql_type = "CHAR";
break;
case SQL_VARYING:
case blr_varying:
sql_type = "VARCHAR";
break;
case SQL_SHORT:
case blr_short:
switch (subtype) {
case 0: sql_type = "SMALLINT"; break;
case 1: sql_type = "NUMERIC"; break;
case 2: sql_type = "DECIMAL"; break;
}
break;
case SQL_LONG:
case blr_long:
switch (subtype) {
case 0: sql_type = "INTEGER"; break;
case 1: sql_type = "NUMERIC"; break;
case 2: sql_type = "DECIMAL"; break;
}
break;
case SQL_FLOAT:
case blr_float:
sql_type = "FLOAT";
break;
case SQL_DOUBLE:
case blr_double:
switch (subtype) {
case 0: sql_type = "DOUBLE PRECISION"; break;
case 1: sql_type = "NUMERIC"; break;
case 2: sql_type = "DECIMAL"; break;
}
break;
case SQL_D_FLOAT:
case blr_d_float:
sql_type = "DOUBLE PRECISION";
break;
case SQL_TIMESTAMP:
case blr_timestamp:
sql_type = "TIMESTAMP";
break;
case SQL_BLOB:
case blr_blob:
sql_type = "BLOB";
break;
case SQL_ARRAY:
sql_type = "ARRAY";
break;
case SQL_QUAD:
case blr_quad:
sql_type = "DECIMAL";
break;
case SQL_TYPE_TIME:
case blr_sql_time:
sql_type = "TIME";
break;
case SQL_TYPE_DATE:
case blr_sql_date:
sql_type = "DATE";
break;
case SQL_INT64:
case blr_int64:
switch (subtype) {
case 0: sql_type = "BIGINT"; break;
case 1: sql_type = "NUMERIC"; break;
case 2: sql_type = "DECIMAL"; break;
}
break;
default:
printf("Unknown: %d, %d\n", code, subtype);
sql_type = "UNKNOWN";
break;
}
return rb_str_new2(sql_type);
}
/* call-seq:
* from_code(code, subtype) -> String
*
* Returns the SQL type, such as VARCHAR or INTEGER for a given type code and subtype.
*/
static VALUE sql_type_from_code(VALUE self, VALUE code, VALUE subtype)
{
return fb_sql_type_from_code(NUM2INT(code), NUM2INT(subtype));
}
static void fb_error_check(ISC_STATUS *isc_status)
{
if (isc_status[0] == 1 && isc_status[1]) {
char buf[1024];
VALUE exc, msg, msg1, msg2;
short code = isc_sqlcode(isc_status);
isc_sql_interprete(code, buf, 1024);
msg1 = rb_str_new2(buf);
msg2 = fb_error_msg(isc_status);
msg = rb_str_cat(msg1, "\n", strlen("\n"));
msg = rb_str_concat(msg, msg2);
exc = rb_exc_new3(rb_eFbError, msg);
rb_iv_set(exc, "error_code", INT2FIX(code));
rb_exc_raise(exc);
}
}
static void fb_error_check_warn(ISC_STATUS *isc_status)
{
short code = isc_sqlcode(isc_status);
if (code != 0) {
char buf[1024];
isc_sql_interprete(code, buf, 1024);
rb_warning("%s(%d)", buf, code);
}
}
static XSQLDA* sqlda_alloc(long cols)
{
XSQLDA *sqlda;
sqlda = (XSQLDA*)xmalloc(XSQLDA_LENGTH(cols));
#ifdef SQLDA_CURRENT_VERSION
sqlda->version = SQLDA_CURRENT_VERSION;
#else
sqlda->version = SQLDA_VERSION1;
#endif
sqlda->sqln = cols;
sqlda->sqld = 0;
return sqlda;
}
static VALUE cursor_close _((VALUE));
static VALUE cursor_drop _((VALUE));
static VALUE cursor_execute _((int, VALUE*, VALUE));
static VALUE cursor_fetchall _((int, VALUE*, VALUE));
static void fb_cursor_mark();
static void fb_cursor_free();
/* connection utilities */
static void fb_connection_check(struct FbConnection *fb_connection)
{
if (fb_connection->db == 0) {
rb_raise(rb_eFbError, "closed db connection");
}
}
static void fb_connection_close_cursors(struct FbConnection *fb_connection)
{
int i;
long len = RARRAY_LEN(fb_connection->cursor);
for (i = 0; i < len; i++) {
cursor_close(RARRAY_PTR(fb_connection->cursor)[i]);
}
}
static void fb_connection_drop_cursors(struct FbConnection *fb_connection)
{
int i;
long len = RARRAY_LEN(fb_connection->cursor);
for (i = 0; i < len; i++) {
cursor_drop(RARRAY_PTR(fb_connection->cursor)[i]);
}
rb_ary_clear(fb_connection->cursor);
}
static void fb_connection_disconnect(struct FbConnection *fb_connection)
{
if (fb_connection->transact) {
isc_commit_transaction(fb_connection->isc_status, &fb_connection->transact);
fb_error_check(fb_connection->isc_status);
}
if (fb_connection->dropped) {
isc_drop_database(fb_connection->isc_status, &fb_connection->db);
} else {
isc_detach_database(fb_connection->isc_status, &fb_connection->db);
}
fb_error_check(fb_connection->isc_status);
}
static void fb_connection_disconnect_warn(struct FbConnection *fb_connection)
{
if (fb_connection->transact) {
isc_commit_transaction(fb_connection->isc_status, &fb_connection->transact);
fb_error_check_warn(fb_connection->isc_status);
}
isc_detach_database(fb_connection->isc_status, &fb_connection->db);
fb_error_check_warn(fb_connection->isc_status);
}
static void fb_connection_mark(struct FbConnection *fb_connection)
{
rb_gc_mark(fb_connection->cursor);
}
static void fb_connection_free(struct FbConnection *fb_connection)
{
if (fb_connection->db) {
fb_connection_disconnect_warn(fb_connection);
}
xfree(fb_connection);
}
/*
static struct FbConnection* fb_connection_check_retrieve(VALUE data)
{
if (TYPE(data) != T_DATA || RDATA(data)->dfree != (void *)fb_connection_free) {
rb_raise(rb_eTypeError,
"Wrong argument type %s (expected Fb::Connection)",
rb_class2name(CLASS_OF(data)));
}
return (struct FbConnection*)RDATA(data)->data;
}
*/
static unsigned short fb_connection_db_SQL_Dialect(struct FbConnection *fb_connection)
{
long dialect;
long length;
char db_info_command = isc_info_db_sql_dialect;
char isc_info_buff[16];
/* Get the db SQL Dialect */
isc_database_info(fb_connection->isc_status, &fb_connection->db,
1, &db_info_command,
sizeof(isc_info_buff), isc_info_buff);
fb_error_check(fb_connection->isc_status);
if (isc_info_buff[0] == isc_info_db_sql_dialect) {
length = isc_vax_integer(&isc_info_buff[1], 2);
dialect = isc_vax_integer(&isc_info_buff[3], (short)length);
} else {
dialect = 1;
}
return dialect;
}
static unsigned short fb_connection_dialect(struct FbConnection *fb_connection)
{
return fb_connection->dialect;
}
/*
static unsigned short fb_connection_db_dialect(struct FbConnection *fb_connection)
{
return fb_connection->db_dialect;
}
*/
/* Transaction option list */
static trans_opts rcom_opt_S[] =
{
{"NO", "RECORD_VERSION", isc_tpb_no_rec_version, -1, 0},
{"RECORD_VERSION", 0, isc_tpb_rec_version, -1, 0},
{"*", 0, isc_tpb_no_rec_version, -1, 0},
{0, 0, 0, 0, 0}
};
static trans_opts read_opt_S[] =
{
{"WRITE", 0, isc_tpb_write, 1, 0},
{"ONLY", 0, isc_tpb_read, 1, 0},
{"COMMITTED", 0, isc_tpb_read_committed, 2, rcom_opt_S},
{0, 0, 0, 0, 0}
};
static trans_opts snap_opt_S[] =
{
{"TABLE", "STABILITY", isc_tpb_consistency, 2, 0},
{"*", 0, isc_tpb_concurrency, 2, 0},
{0, 0, 0, 0, 0}
};
static trans_opts isol_opt_S[] =
{
{"SNAPSHOT", 0, 0, 0, snap_opt_S},
{"READ", "COMMITTED", isc_tpb_read_committed, 2, rcom_opt_S},
{0, 0, 0, 0, 0}
};
static trans_opts trans_opt_S[] =
{
{"READ", 0, 0, 0, read_opt_S},
{"WAIT", 0, isc_tpb_wait, 3, 0},
{"NO", "WAIT", isc_tpb_nowait, 3, 0},
{"ISOLATION", "LEVEL", 0, 0, isol_opt_S},
{"SNAPSHOT", 0, 0, 0, snap_opt_S},
{"RESERVING", 0, -1, 0, 0},
{0, 0, 0, 0, 0}
};
/* Name1 Name2 Option value Position Sub-option */
#define RESV_TABLEEND "FOR"
#define RESV_SHARED "SHARED"
#define RESV_PROTECTD "PROTECTED"
#define RESV_READ "READ"
#define RESV_WRITE "WRITE"
#define RESV_CONTINUE ','
static char* trans_parseopts(VALUE opt, long *tpb_len)
{
char *s, *trans;
long used;
long size;
char *tpb;
trans_opts *curr_p;
trans_opts *target_p;
char *check1_p;
char *check2_p;
int count;
int next_c;
char check_f[4];
char *resv_p;
char *resend_p;
char *tblend_p = 0;
long tbl_len;
long res_first;
int res_count;
long ofs;
char sp_prm;
char rw_prm;
int cont_f;
const char *desc = 0;
/* Initialize */
s = StringValuePtr(opt);
trans = ALLOCA_N(char, strlen(s)+1);
strcpy(trans, s);
s = trans;
while (*s) {
*s = UPPER(*s);
s++;
}
used = 0;
size = 0;
tpb = NULL;
memset((void *)check_f, 0, sizeof(check_f));
/* Set the default transaction option */
tpb = (char*)xmalloc(TPBBUFF_ALLOC);
size = TPBBUFF_ALLOC;
memcpy((void*)tpb, (void*)isc_tpb_0, sizeof(isc_tpb_0));
used = sizeof(isc_tpb_0);
/* Analize the transaction option strings */
curr_p = trans_opt_S;
check1_p = strtok(trans, CMND_DELIMIT);
if (check1_p) {
check2_p = strtok(0, CMND_DELIMIT);
} else {
check2_p = 0;
}
while (curr_p) {
target_p = 0;
next_c = 0;
for (count = 0; curr_p[count].option1; count++) {
if (!strcmp(curr_p[count].option1, "*")) {
target_p = &curr_p[count];
break;
} else if (check1_p && !strcmp(check1_p, curr_p[count].option1)) {
if (!curr_p[count].option2) {
next_c = 1;
target_p = &curr_p[count];
break;
} else if (check2_p && !strcmp(check2_p, curr_p[count].option2)) {
next_c = 2;
target_p = &curr_p[count];
break;
}
}
}
if (!target_p) {
desc = "Illegal transaction option was specified";
goto error;
}
/* Set the transaction option */
if (target_p->optval > '\0') {
if (target_p->position > 0) {
if (check_f[target_p->position]) {
desc = "Duplicate transaction option was specified";
goto error;
}
tpb[target_p->position] = target_p->optval;
check_f[target_p->position] = 1;
} else {
if (used + 1 > size) {
tpb = (char *)realloc(tpb, size + TPBBUFF_ALLOC);
size += TPBBUFF_ALLOC;
}
tpb[used] = target_p->optval;
used++;
}
} else if (target_p->optval) { /* RESERVING ... FOR */
if (check_f[0]) {
desc = "Duplicate transaction option was specified";
goto error;
}
resv_p = check2_p;
if (!resv_p || !strcmp(resv_p, RESV_TABLEEND)) {
desc = "RESERVING needs table name list";
goto error;
}
while (resv_p) {
res_first = used;
res_count = 0;
resend_p = strtok(0, CMND_DELIMIT);
while (resend_p) {
if (!strcmp(resend_p, RESV_TABLEEND)) {
break;
}
resend_p = strtok(0, CMND_DELIMIT);
}
if (!resend_p) {
desc = "Illegal transaction option was specified";
goto error;
}
while (resv_p < resend_p) {
if (*resv_p == '\0' || (ofs = strspn(resv_p, LIST_DELIMIT)) < 0) {
resv_p++;
} else {
resv_p = &resv_p[ofs];
tblend_p = strpbrk(resv_p, LIST_DELIMIT);
if (tblend_p) {
tbl_len = tblend_p - resv_p;
} else {
tbl_len = strlen(resv_p);
}
if (tbl_len > META_NAME_MAX) {
desc = "Illegal table name was specified";
goto error;
}
if (tbl_len > 0) {
if (used + tbl_len + 3 > size) {
tpb = (char*)xrealloc(tpb, size+TPBBUFF_ALLOC);
size += TPBBUFF_ALLOC;
}
tpb[used+1] = (char)tbl_len;
memcpy((void *)&tpb[used+2],resv_p, tbl_len);
used += tbl_len + 3;
res_count++;
}
resv_p += tbl_len;
}
}
resv_p = strtok(0, CMND_DELIMIT);
if (resv_p && !strcmp(resv_p, RESV_SHARED)) {
sp_prm = isc_tpb_shared;
} else if (resv_p && !strcmp(resv_p, RESV_PROTECTD)) {
sp_prm = isc_tpb_protected;
} else {
desc = "RESERVING needs {SHARED|PROTECTED} {READ|WRITE}";
goto error;
}
cont_f = 0;
resv_p = strtok(0, CMND_DELIMIT);
if (resv_p) {
if (resv_p[strlen(resv_p)-1] == RESV_CONTINUE) {
cont_f = 1;
resv_p[strlen(resv_p)-1] = '\0';
} else {
tblend_p = strpbrk(resv_p, LIST_DELIMIT);
if (tblend_p) {
cont_f = 2;
*tblend_p = '\0';
}
}
}
if (resv_p && !strcmp(resv_p, RESV_READ)) {
rw_prm = isc_tpb_lock_read;
} else if (resv_p && !strcmp(resv_p, RESV_WRITE)) {
rw_prm = isc_tpb_lock_write;
} else {
desc = "RESERVING needs {SHARED|PROTECTED} {READ|WRITE}";
goto error;
}
ofs = res_first;
for (count = 0; count < res_count; count++) {
tpb[ofs++] = rw_prm;
ofs += tpb[ofs] + 1;
tpb[ofs++] = sp_prm;
}
if (cont_f == 1) {
resv_p = strtok(0, CMND_DELIMIT);
if (!resv_p) {
desc = "Unexpected end of command";
goto error;
}
}
if (cont_f == 2) {
resv_p = tblend_p + 1;
} else {
resv_p = strtok(0, CMND_DELIMIT);
if (resv_p) {
if ((int)strlen(resv_p) == 1 && resv_p[0] == RESV_CONTINUE) {
resv_p = strtok(0, CMND_DELIMIT);
if (!resv_p) {
desc = "Unexpected end of command";
goto error;
}
} else if (resv_p[0] == RESV_CONTINUE) {
resv_p++;
} else {
next_c = 1;
check2_p = resv_p;
resv_p = 0;
}
} else {
next_c = 0;
check1_p = check2_p = 0;
}
}
}
check_f[0] = 1;
}
/* Set the next check list */
curr_p = target_p->sub_opts;
for (count = 0; count < next_c; count++) {
check1_p = check2_p;
if (check2_p) {
check2_p = strtok(0, CMND_DELIMIT);
}
}
if (check1_p && !curr_p) {
curr_p = trans_opt_S;
}
}
/* Set the results */
*tpb_len = used;
return tpb;
error:
xfree(tpb);
rb_raise(rb_eFbError, "%s", desc);
}
static void fb_connection_transaction_start(struct FbConnection *fb_connection, VALUE opt)
{
char *tpb = 0;
long tpb_len;
if (fb_connection->transact) {
rb_raise(rb_eFbError, "A transaction has been already started");
}
if (!NIL_P(opt)) {
tpb = trans_parseopts(opt, &tpb_len);
} else {
tpb_len = 0;
tpb = NULL;
}
isc_start_transaction(fb_connection->isc_status, &fb_connection->transact, 1, &fb_connection->db, tpb_len, tpb);
xfree(tpb);
fb_error_check(fb_connection->isc_status);
}
static void fb_connection_commit(struct FbConnection *fb_connection)
{
if (fb_connection->transact) {
fb_connection_close_cursors(fb_connection);
isc_commit_transaction(fb_connection->isc_status, &fb_connection->transact);
fb_error_check(fb_connection->isc_status);
}
}
static void fb_connection_rollback(struct FbConnection *fb_connection)
{
if (fb_connection->transact) {
fb_connection_close_cursors(fb_connection);
isc_rollback_transaction(fb_connection->isc_status, &fb_connection->transact);
fb_error_check(fb_connection->isc_status);
}
}
/* call-seq:
* transaction(options) -> true
* transaction(options) { } -> block result
*
* Start a transaction for this connection.
*/
static VALUE connection_transaction(int argc, VALUE *argv, VALUE self)
{
struct FbConnection *fb_connection;
VALUE opt = Qnil;
rb_scan_args(argc, argv, "01", &opt);
Data_Get_Struct(self, struct FbConnection, fb_connection);
fb_connection_transaction_start(fb_connection, opt);
if (rb_block_given_p()) {
int state;
VALUE result = rb_protect(rb_yield, 0, &state);
if (state) {
fb_connection_rollback(fb_connection);
return rb_funcall(rb_mKernel, rb_intern("raise"), 0);
} else {
fb_connection_commit(fb_connection);
return result;
}
} else {
return Qtrue;
}
}
/* call-seq:
* transaction_started()? -> true or false
*
* Returns true if a transaction is currently active.
*/
static VALUE connection_transaction_started(VALUE self)
{
struct FbConnection *fb_connection;
Data_Get_Struct(self, struct FbConnection, fb_connection);
return fb_connection->transact ? Qtrue : Qfalse;
}
/* call-seq:
* commit() -> nil
*