-/*
- * Copyright (C) 1995-2007, Index Data ApS
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2010 Index Data
* See the file LICENSE for details.
- *
- * $Id: srwutil.c,v 1.56 2007-05-06 20:12:20 adam Exp $
*/
/**
* \file srwutil.c
*/
#include <stdlib.h>
+#include <assert.h>
#include <yaz/srw.h>
+#include <yaz/matchstr.h>
#include <yaz/yaz-iconv.h>
+#include "sru-p.h"
-static int hex_digit (int ch)
-{
- if (ch >= '0' && ch <= '9')
- return ch - '0';
- else if (ch >= 'a' && ch <= 'f')
- return ch - 'a'+10;
- else if (ch >= 'A' && ch <= 'F')
- return ch - 'A'+10;
- return 0;
-}
-
-void encode_uri_char(char *dst, char ch)
-{
- if (ch == ' ')
- strcpy(dst, "+");
- else if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') ||
- (ch >= '0' && ch <= '9'))
- {
- dst[0] = ch;
- dst[1] = '\0';
- }
- else
- {
- dst[0] = '%';
- sprintf(dst+1, "%02X", (unsigned char ) ch);
- }
-}
-
-static void yaz_array_to_uri_ex(char **path, ODR o, char **name, char **value,
- const char *extra_args)
-{
- size_t i, szp = 0, sz = extra_args ? 1+strlen(extra_args) : 1;
- for(i = 0; name[i]; i++)
- sz += strlen(name[i]) + 3 + strlen(value[i]) * 3;
- *path = (char *) odr_malloc(o, sz);
-
- for(i = 0; name[i]; i++)
- {
- size_t j, ilen;
- if (i)
- (*path)[szp++] = '&';
- ilen = strlen(name[i]);
- memcpy(*path+szp, name[i], ilen);
- szp += ilen;
- (*path)[szp++] = '=';
- for (j = 0; value[i][j]; j++)
- {
- size_t vlen;
- char vstr[5];
- encode_uri_char(vstr, value[i][j]);
- vlen = strlen(vstr);
- memcpy(*path+szp, vstr, vlen);
- szp += vlen;
- }
- }
- if (extra_args)
- {
- if (i)
- (*path)[szp++] = '&';
- memcpy(*path + szp, extra_args, strlen(extra_args));
- szp += strlen(extra_args);
- }
- (*path)[szp] = '\0';
-}
-
-void yaz_array_to_uri(char **path, ODR o, char **name, char **value)
+static char *yaz_decode_sru_dbpath_odr(ODR n, const char *uri, size_t len)
{
- yaz_array_to_uri_ex(path, o, name, value, 0);
+ return odr_strdupn(n, uri, len);
}
-int yaz_uri_array(const char *path, ODR o, char ***name, char ***val)
+void yaz_encode_sru_dbpath_buf(char *dst, const char *db)
{
- int no = 2;
- const char *cp;
- *name = 0;
- if (*path == '?')
- path++;
- if (!*path)
- return 0;
- cp = path;
- while ((cp = strchr(cp, '&')))
- {
- cp++;
- no++;
- }
- *name = (char **) odr_malloc(o, no * sizeof(char*));
- *val = (char **) odr_malloc(o, no * sizeof(char*));
-
- for (no = 0; *path; no++)
- {
- const char *p1 = strchr(path, '=');
- size_t i = 0;
- char *ret;
- if (!p1)
- break;
-
- (*name)[no] = (char *) odr_malloc(o, (p1-path)+1);
- memcpy((*name)[no], path, p1-path);
- (*name)[no][p1-path] = '\0';
-
- path = p1 + 1;
- p1 = strchr(path, '&');
- if (!p1)
- p1 = strlen(path) + path;
- (*val)[no] = ret = (char *) odr_malloc(o, p1 - path + 1);
- while (*path && *path != '&')
- {
- if (*path == '+')
- {
- ret[i++] = ' ';
- path++;
- }
- else if (*path == '%' && path[1] && path[2])
- {
- ret[i++] = hex_digit (path[1])*16 + hex_digit (path[2]);
- path = path + 3;
- }
- else
- ret[i++] = *path++;
- }
- ret[i] = '\0';
-
- if (*path)
- path++;
- }
- (*name)[no] = 0;
- (*val)[no] = 0;
- return no;
+ assert(db);
+ *dst = '/';
+ strcpy(dst+1, db);
}
-char *yaz_uri_val(const char *path, const char *name, ODR o)
+char *yaz_encode_sru_dbpath_odr(ODR out, const char *db)
{
- size_t nlen = strlen(name);
- if (*path != '?')
- return 0;
- path++;
- while (path && *path)
- {
- const char *p1 = strchr(path, '=');
- if (!p1)
- break;
- if ((size_t)(p1 - path) == nlen && !memcmp(path, name, nlen))
- {
- size_t i = 0;
- char *ret;
-
- path = p1 + 1;
- p1 = strchr(path, '&');
- if (!p1)
- p1 = strlen(path) + path;
- ret = (char *) odr_malloc(o, p1 - path + 1);
- while (*path && *path != '&')
- {
- if (*path == '+')
- {
- ret[i++] = ' ';
- path++;
- }
- else if (*path == '%' && path[1] && path[2])
- {
- ret[i++] = hex_digit (path[1])*16 + hex_digit (path[2]);
- path = path + 3;
- }
- else
- ret[i++] = *path++;
- }
- ret[i] = '\0';
- return ret;
- }
- path = strchr(p1, '&');
- if (path)
- path++;
- }
- return 0;
+ char *dst = odr_malloc(out, 3 * strlen(db) + 2);
+ yaz_encode_sru_dbpath_buf(dst, db);
+ return dst;
}
+#if YAZ_HAVE_XML2
static int yaz_base64decode(const char *in, char *out)
{
const char *map = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
*out = '\0';
return olen;
}
+#endif
+
+int yaz_srw_check_content_type(Z_HTTP_Response *hres)
+{
+ const char *content_type = z_HTTP_header_lookup(hres->headers,
+ "Content-Type");
+ if (content_type)
+ {
+ if (!yaz_strcmp_del("text/xml", content_type, "; "))
+ return 1;
+ if (!yaz_strcmp_del("application/xml", content_type, "; "))
+ return 1;
+ }
+ return 0;
+}
/**
* Look for authentication tokens in HTTP Basic parameters or in x-username/x-password
* parameters. Added by SH.
*/
+#if YAZ_HAVE_XML2
static void yaz_srw_decodeauth(Z_SRW_PDU *sr, Z_HTTP_Request *hreq,
char *username, char *password, ODR decode)
{
sr->password = odr_strdup(decode, pbuf);
}
}
+#endif
-void yaz_uri_val_int(const char *path, const char *name, ODR o, int **intp)
+void yaz_uri_val_int(const char *path, const char *name, ODR o, Odr_int **intp)
{
const char *v = yaz_uri_val(path, name, o);
if (v)
}
+void yaz_mk_sru_surrogate(ODR o, Z_SRW_record *record, int pos,
+ int code, const char *details)
+{
+ const char *message = yaz_diag_srw_str(code);
+ int len = 200;
+ if (message)
+ len += strlen(message);
+ if (details)
+ len += strlen(details);
+
+ record->recordData_buf = (char *) odr_malloc(o, len);
+
+ sprintf(record->recordData_buf, "<diagnostic "
+ "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
+ " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
+ if (details)
+ sprintf(record->recordData_buf + strlen(record->recordData_buf),
+ " <details>%s</details>\n", details);
+ if (message)
+ sprintf(record->recordData_buf + strlen(record->recordData_buf),
+ " <message>%s</message>\n", message);
+ sprintf(record->recordData_buf + strlen(record->recordData_buf),
+ "</diagnostic>\n");
+ record->recordData_len = strlen(record->recordData_buf);
+ record->recordPosition = odr_intdup(o, pos);
+ record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
+}
+
static void grab_charset(ODR o, const char *content_type, char **charset)
{
if (charset)
if (!p1)
p1 = p0 + strlen(p0);
if (p1 != p0)
- {
- db = (char*) odr_malloc(decode, p1 - p0 + 1);
- memcpy (db, p0, p1 - p0);
- db[p1 - p0] = '\0';
- }
-
+ db = yaz_decode_sru_dbpath_odr(decode, p0, p1 - p0);
grab_charset(decode, content_type, charset);
ret = z_soap_codec(decode, soap_package,
return 2;
}
+#if YAZ_HAVE_XML2
static int yaz_sru_decode_integer(ODR odr, const char *pname,
- const char *valstr, int **valp,
+ const char *valstr, Odr_int **valp,
Z_SRW_diagnostic **diag, int *num_diag,
int min_value)
{
*valp = odr_intdup(odr, ival);
return 1;
}
+#endif
/**
- http://www.loc.gov/z3950/agency/zing/srw/service.html
+ http://www.loc.gov/z3950/agency/zing/srw/service.html
*/
int yaz_sru_decode(Z_HTTP_Request *hreq, Z_SRW_PDU **srw_pdu,
Z_SOAP **soap_package, ODR decode, char **charset,
};
#endif
const char *content_type = z_HTTP_header_lookup(hreq->headers,
- "Content-Type");
+ "Content-Type");
/*
SRU GET: ignore content type.
*/
if (!strcmp(hreq->method, "GET")
||
- (!strcmp(hreq->method, "POST") && content_type &&
- !yaz_strcmp_del("application/x-www-form-urlencoded",
- content_type, "; ")))
+ (!strcmp(hreq->method, "POST") && content_type &&
+ !yaz_strcmp_del("application/x-www-form-urlencoded",
+ content_type, "; ")))
{
char *db = "Default";
const char *p0 = hreq->path, *p1;
char *maximumTerms = 0;
char *responsePosition = 0;
char *extraRequestData = 0;
+ Z_SRW_extra_arg *extra_args = 0;
#endif
char **uri_name;
char **uri_val;
if (!p1)
p1 = p0 + strlen(p0);
if (p1 != p0)
- {
- db = (char*) odr_malloc(decode, p1 - p0 + 1);
- memcpy (db, p0, p1 - p0);
- db[p1 - p0] = '\0';
- }
+ db = yaz_decode_sru_dbpath_odr(decode, p0, p1 - p0);
if (!strcmp(hreq->method, "POST"))
p1 = hreq->content_buf;
- yaz_uri_array(p1, decode, &uri_name, &uri_val);
+ yaz_uri_to_array(p1, decode, &uri_name, &uri_val);
#if YAZ_HAVE_XML2
if (uri_name)
{
responsePosition = v;
else if (!strcmp(n, "extraRequestData"))
extraRequestData = v;
+ else if (n[0] == 'x' && n[1] == '-')
+ {
+ Z_SRW_extra_arg **l = &extra_args;
+ while (*l)
+ l = &(*l)->next;
+ *l = (Z_SRW_extra_arg *) odr_malloc(decode, sizeof(**l));
+ (*l)->name = odr_strdup(decode, n);
+ (*l)->value = odr_strdup(decode, v);
+ (*l)->next = 0;
+ }
else
yaz_add_srw_diagnostic(decode, diag, num_diag,
YAZ_SRW_UNSUPP_PARAMETER, n);
YAZ_SRW_MANDATORY_PARAMETER_NOT_SUPPLIED, "version");
version = "1.1";
}
- if (strcmp(version, "1.1"))
+
+ version = yaz_negotiate_sru_version(version);
+
+ if (!version)
+ { /* negotiation failed. */
yaz_add_srw_diagnostic(decode, diag, num_diag,
- YAZ_SRW_UNSUPP_VERSION, "1.1");
+ YAZ_SRW_UNSUPP_VERSION, "1.2");
+ version = "1.2";
+ }
+
if (!operation)
{
if (uri_name)
Z_SRW_PDU *sr = yaz_srw_get(decode, Z_SRW_searchRetrieve_request);
sr->srw_version = version;
+ sr->extra_args = extra_args;
*srw_pdu = sr;
yaz_srw_decodeauth(sr, hreq, username, password, decode);
if (query)
Z_SRW_PDU *sr = yaz_srw_get(decode, Z_SRW_explain_request);
sr->srw_version = version;
+ sr->extra_args = extra_args;
yaz_srw_decodeauth(sr, hreq, username, password, decode);
*srw_pdu = sr;
sr->u.explain_request->recordPacking = recordPacking;
Z_SRW_PDU *sr = yaz_srw_get(decode, Z_SRW_scan_request);
sr->srw_version = version;
+ sr->extra_args = extra_args;
*srw_pdu = sr;
yaz_srw_decodeauth(sr, hreq, username, password, decode);
return yaz_srw_get_records(o, 1);
}
-Z_SRW_PDU *yaz_srw_get_core_v_1_1(ODR o)
+static Z_SRW_PDU *yaz_srw_get_core_ver(ODR o, const char *version)
{
Z_SRW_PDU *p = (Z_SRW_PDU *) odr_malloc(o, sizeof(*p));
- p->srw_version = odr_strdup(o, "1.1");
+ p->srw_version = odr_strdup(o, version);
p->username = 0;
p->password = 0;
p->extra_args = 0;
+ p->extraResponseData_buf = 0;
+ p->extraResponseData_len = 0;
return p;
}
+Z_SRW_PDU *yaz_srw_get_core_v_1_1(ODR o)
+{
+ return yaz_srw_get_core_ver(o, "1.1");
+}
+
Z_SRW_PDU *yaz_srw_get(ODR o, int which)
{
- Z_SRW_PDU *sr = yaz_srw_get_core_v_1_1(o);
+ return yaz_srw_get_pdu(o, which, "1.1");
+}
+
+Z_SRW_PDU *yaz_srw_get_pdu(ODR o, int which, const char *version)
+{
+ Z_SRW_PDU *sr = yaz_srw_get_core_ver(o, version);
+
sr->which = which;
switch(which)
{
}
/* bib1:srw */
-static int srw_bib1_map[] = {
+static int bib1_srw_map[] = {
1, 1,
2, 2,
3, 11,
0
};
+/*
+ * This array contains overrides for when the first occurrence of a
+ * particular SRW error in the array above does not correspond with
+ * the best back-translation of that SRW error.
+ */
+static int srw_bib1_map[] = {
+ 66, 238,
+ /* No doubt there are many more */
+ 0
+};
+
+
int yaz_diag_bib1_to_srw (int code)
{
- const int *p = srw_bib1_map;
+ const int *p = bib1_srw_map;
while (*p)
{
if (code == p[0])
int yaz_diag_srw_to_bib1(int code)
{
+ /* Check explicit reverse-map first */
const int *p = srw_bib1_map;
while (*p)
{
+ if (code == p[0])
+ return p[1];
+ p += 2;
+ }
+
+ /* Fall back on reverse lookup in main map */
+ p = bib1_srw_map;
+ while (*p)
+ {
if (code == p[1])
return p[0];
p += 2;
return 1;
}
-static void add_val_int(ODR o, char **name, char **value, int *i,
- char *a_name, int *val)
+void yaz_add_name_value_int(ODR o, char **name, char **value, int *i,
+ char *a_name, Odr_int *val)
{
if (val)
{
name[*i] = a_name;
- value[*i] = (char *) odr_malloc(o, 30);
- sprintf(value[*i], "%d", *val);
+ value[*i] = (char *) odr_malloc(o, 40);
+ sprintf(value[*i], ODR_INT_PRINTF, *val);
(*i)++;
}
}
-static void add_val_str(ODR o, char **name, char **value, int *i,
- char *a_name, char *val)
+void yaz_add_name_value_str(ODR o, char **name, char **value, int *i,
+ char *a_name, char *val)
{
if (val)
{
}
static int yaz_get_sru_parms(const Z_SRW_PDU *srw_pdu, ODR encode,
- char **name, char **value)
+ char **name, char **value, int max_names)
{
int i = 0;
- add_val_str(encode, name, value, &i, "version", srw_pdu->srw_version);
+ yaz_add_name_value_str(encode, name, value, &i, "version", srw_pdu->srw_version);
name[i] = "operation";
switch(srw_pdu->which)
{
switch(srw_pdu->u.request->query_type)
{
case Z_SRW_query_type_cql:
- add_val_str(encode, name, value, &i, "query",
- srw_pdu->u.request->query.cql);
+ yaz_add_name_value_str(encode, name, value, &i, "query",
+ srw_pdu->u.request->query.cql);
break;
case Z_SRW_query_type_pqf:
- add_val_str(encode, name, value, &i, "x-pquery",
- srw_pdu->u.request->query.pqf);
+ yaz_add_name_value_str(encode, name, value, &i, "x-pquery",
+ srw_pdu->u.request->query.pqf);
break;
case Z_SRW_query_type_xcql:
- add_val_str(encode, name, value, &i, "x-cql",
- srw_pdu->u.request->query.xcql);
+ yaz_add_name_value_str(encode, name, value, &i, "x-cql",
+ srw_pdu->u.request->query.xcql);
break;
}
switch(srw_pdu->u.request->sort_type)
case Z_SRW_sort_type_none:
break;
case Z_SRW_sort_type_sort:
- add_val_str(encode, name, value, &i, "sortKeys",
- srw_pdu->u.request->sort.sortKeys);
+ yaz_add_name_value_str(encode, name, value, &i, "sortKeys",
+ srw_pdu->u.request->sort.sortKeys);
break;
}
- add_val_int(encode, name, value, &i, "startRecord",
- srw_pdu->u.request->startRecord);
- add_val_int(encode, name, value, &i, "maximumRecords",
- srw_pdu->u.request->maximumRecords);
- add_val_str(encode, name, value, &i, "recordSchema",
- srw_pdu->u.request->recordSchema);
- add_val_str(encode, name, value, &i, "recordPacking",
- srw_pdu->u.request->recordPacking);
- add_val_str(encode, name, value, &i, "recordXPath",
- srw_pdu->u.request->recordXPath);
- add_val_str(encode, name, value, &i, "stylesheet",
- srw_pdu->u.request->stylesheet);
- add_val_int(encode, name, value, &i, "resultSetTTL",
- srw_pdu->u.request->resultSetTTL);
+ yaz_add_name_value_int(encode, name, value, &i, "startRecord",
+ srw_pdu->u.request->startRecord);
+ yaz_add_name_value_int(encode, name, value, &i, "maximumRecords",
+ srw_pdu->u.request->maximumRecords);
+ yaz_add_name_value_str(encode, name, value, &i, "recordSchema",
+ srw_pdu->u.request->recordSchema);
+ yaz_add_name_value_str(encode, name, value, &i, "recordPacking",
+ srw_pdu->u.request->recordPacking);
+ yaz_add_name_value_str(encode, name, value, &i, "recordXPath",
+ srw_pdu->u.request->recordXPath);
+ yaz_add_name_value_str(encode, name, value, &i, "stylesheet",
+ srw_pdu->u.request->stylesheet);
+ yaz_add_name_value_int(encode, name, value, &i, "resultSetTTL",
+ srw_pdu->u.request->resultSetTTL);
break;
case Z_SRW_explain_request:
value[i++] = "explain";
- add_val_str(encode, name, value, &i, "stylesheet",
- srw_pdu->u.explain_request->stylesheet);
+ yaz_add_name_value_str(encode, name, value, &i, "stylesheet",
+ srw_pdu->u.explain_request->stylesheet);
break;
case Z_SRW_scan_request:
value[i++] = "scan";
switch(srw_pdu->u.scan_request->query_type)
{
case Z_SRW_query_type_cql:
- add_val_str(encode, name, value, &i, "scanClause",
- srw_pdu->u.scan_request->scanClause.cql);
+ yaz_add_name_value_str(encode, name, value, &i, "scanClause",
+ srw_pdu->u.scan_request->scanClause.cql);
break;
case Z_SRW_query_type_pqf:
- add_val_str(encode, name, value, &i, "x-pScanClause",
- srw_pdu->u.scan_request->scanClause.pqf);
+ yaz_add_name_value_str(encode, name, value, &i, "x-pScanClause",
+ srw_pdu->u.scan_request->scanClause.pqf);
break;
case Z_SRW_query_type_xcql:
- add_val_str(encode, name, value, &i, "x-cqlScanClause",
- srw_pdu->u.scan_request->scanClause.xcql);
+ yaz_add_name_value_str(encode, name, value, &i, "x-cqlScanClause",
+ srw_pdu->u.scan_request->scanClause.xcql);
break;
}
- add_val_int(encode, name, value, &i, "responsePosition",
- srw_pdu->u.scan_request->responsePosition);
- add_val_int(encode, name, value, &i, "maximumTerms",
- srw_pdu->u.scan_request->maximumTerms);
- add_val_str(encode, name, value, &i, "stylesheet",
- srw_pdu->u.scan_request->stylesheet);
+ yaz_add_name_value_int(encode, name, value, &i, "responsePosition",
+ srw_pdu->u.scan_request->responsePosition);
+ yaz_add_name_value_int(encode, name, value, &i, "maximumTerms",
+ srw_pdu->u.scan_request->maximumTerms);
+ yaz_add_name_value_str(encode, name, value, &i, "stylesheet",
+ srw_pdu->u.scan_request->stylesheet);
break;
case Z_SRW_update_request:
value[i++] = "update";
default:
return -1;
}
+ if (srw_pdu->extra_args)
+ {
+ Z_SRW_extra_arg *ea = srw_pdu->extra_args;
+ for (; ea && i < max_names-1; ea = ea->next)
+ {
+ name[i] = ea->name;
+ value[i] = ea->value;
+ i++;
+ }
+ }
name[i++] = 0;
+
return 0;
}
char *uri_args;
char *path;
- if (yaz_get_sru_parms(srw_pdu, encode, name, value))
+ z_HTTP_header_add_basic_auth(encode, &hreq->headers,
+ srw_pdu->username, srw_pdu->password);
+ if (yaz_get_sru_parms(srw_pdu, encode, name, value, 30))
return -1;
- yaz_array_to_uri_ex(&uri_args, encode, name, value, srw_pdu->extra_args);
+ yaz_array_to_uri(&uri_args, encode, name, value);
hreq->method = "GET";
path = (char *)
- odr_malloc(encode, strlen(hreq->path) + strlen(uri_args) + 4
- +(srw_pdu->extra_args ? strlen(srw_pdu->extra_args) : 0));
+ odr_malloc(encode, strlen(hreq->path) + strlen(uri_args) + 4);
sprintf(path, "%s?%s", hreq->path, uri_args);
hreq->path = path;
char *name[30], *value[30]; /* definite upper limit for SRU params */
char *uri_args;
- if (yaz_get_sru_parms(srw_pdu, encode, name, value))
+ z_HTTP_header_add_basic_auth(encode, &hreq->headers,
+ srw_pdu->username, srw_pdu->password);
+ if (yaz_get_sru_parms(srw_pdu, encode, name, value, 30))
return -1;
- yaz_array_to_uri_ex(&uri_args, encode, name, value, srw_pdu->extra_args);
+ yaz_array_to_uri(&uri_args, encode, name, value);
hreq->method = "POST";
};
Z_SOAP *p = (Z_SOAP*) odr_malloc(odr, sizeof(*p));
+ z_HTTP_header_add_basic_auth(odr, &hreq->headers,
+ srw_pdu->username, srw_pdu->password);
z_HTTP_header_add_content_type(odr,
&hreq->headers,
"text/xml", charset);
int yaz_srw_str_to_pack(const char *str)
{
- if (!strcmp(str, "string"))
+ if (!yaz_matchstr(str, "string"))
return Z_SRW_recordPacking_string;
- if (!strcmp(str, "xml"))
+ if (!yaz_matchstr(str, "xml"))
return Z_SRW_recordPacking_XML;
- if (!strcmp(str, "url"))
+ if (!yaz_matchstr(str, "url"))
return Z_SRW_recordPacking_URL;
return -1;
}
+void yaz_encode_sru_extra(Z_SRW_PDU *sr, ODR odr, const char *extra_args)
+{
+ if (extra_args)
+ {
+ char **name;
+ char **val;
+ Z_SRW_extra_arg **ea = &sr->extra_args;
+ yaz_uri_to_array(extra_args, odr, &name, &val);
+
+ while (*name)
+ {
+ *ea = (Z_SRW_extra_arg *) odr_malloc(odr, sizeof(**ea));
+ (*ea)->name = *name;
+ (*ea)->value = *val;
+ ea = &(*ea)->next;
+ val++;
+ name++;
+ }
+ *ea = 0;
+ }
+}
+
+
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab