+++ /dev/null
-/* typecast_array.c - array typecasters
- *
- * Copyright (C) 2005 Federico Di Gregorio <fog@debian.org>
- *
- * This file is part of the psycopg module.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#define MAX_DIMENSIONS 16
-
-/** typecast_array_cleanup - remove the horrible [...]= stuff **/
-
-static int
-typecast_array_cleanup(char **str, int *len)
-{
- int i, depth = 1;
-
- if ((*str)[0] != '[') return -1;
-
- for (i=1 ; depth > 0 && i < *len ; i++) {
- if ((*str)[i] == '[')
- depth += 1;
- else if ((*str)[i] == ']')
- depth -= 1;
- }
- if ((*str)[i] != '=') return -1;
-
- *str = &((*str)[i+1]);
- *len = *len - i - 1;
- return 0;
-}
-
-/** typecast_array_scan - scan a string looking for array items **/
-
-#define ASCAN_ERROR -1
-#define ASCAN_EOF 0
-#define ASCAN_BEGIN 1
-#define ASCAN_END 2
-#define ASCAN_TOKEN 3
-#define ASCAN_QUOTED 4
-
-static int
-typecast_array_tokenize(char *str, int strlength,
- int *pos, char** token, int *length)
-{
- /* FORTRAN glory */
- int i, j, q, b, l, res;
-
- Dprintf("typecast_array_tokenize: '%s', %d/%d",
- &str[*pos], *pos, strlength);
-
- /* we always get called with pos pointing at the start of a token, so a
- fast check is enough for ASCAN_EOF, ASCAN_BEGIN and ASCAN_END */
- if (*pos == strlength) {
- return ASCAN_EOF;
- }
- else if (str[*pos] == '{') {
- *pos += 1;
- return ASCAN_BEGIN;
- }
- else if (str[*pos] == '}') {
- *pos += 1;
- if (str[*pos] == ',')
- *pos += 1;
- return ASCAN_END;
- }
-
- /* now we start looking for the first unquoted ',' or '}', the only two
- tokens that can limit an array element */
- q = 0; /* if q is odd we're inside quotes */
- b = 0; /* if b is 1 we just encountered a backslash */
- res = ASCAN_TOKEN;
-
- for (i = *pos ; i < strlength ; i++) {
- switch (str[i]) {
- case '"':
- if (b == 0)
- q += 1;
- else
- b = 0;
- break;
-
- case '\\':
- res = ASCAN_QUOTED;
- if (b == 0)
- b = 1;
- else
- /* we're backslashing a backslash */
- b = 0;
- break;
-
- case '}':
- case ',':
- if (b == 0 && ((q&1) == 0))
- goto tokenize;
- break;
-
- default:
- /* reset the backslash counter */
- b = 0;
- break;
- }
- }
-
- tokenize:
- /* remove initial quoting character and calculate raw length */
- l = i - *pos;
- if (str[*pos] == '"') {
- *pos += 1;
- l -= 2;
- }
-
- if (res == ASCAN_QUOTED) {
- char *buffer = PyMem_Malloc(l+1);
- if (buffer == NULL) return ASCAN_ERROR;
-
- *token = buffer;
-
- for (j = *pos; j < *pos+l; j++) {
- if (str[j] != '\\'
- || (j > *pos && str[j-1] == '\\'))
- *(buffer++) = str[j];
- }
-
- *buffer = '\0';
- *length = buffer - *token;
- }
- else {
- *token = &str[*pos];
- *length = l;
- }
-
- *pos = i;
-
- /* skip the comma and set position to the start of next token */
- if (str[i] == ',') *pos += 1;
-
- return res;
-}
-
-static int
-typecast_array_scan(char *str, int strlength,
- PyObject *curs, PyObject *base, PyObject *array)
-{
- int state, length = 0, pos = 0;
- char *token;
-
- PyObject *stack[MAX_DIMENSIONS];
- int stack_index = 0;
-
- while (1) {
- token = NULL;
- state = typecast_array_tokenize(str, strlength, &pos, &token, &length);
- Dprintf("typecast_array_scan: state = %d, length = %d, token = '%s'",
- state, length, token);
- if (state == ASCAN_TOKEN || state == ASCAN_QUOTED) {
- PyObject *obj = typecast_cast(base, token, length, curs);
-
- /* before anything else we free the memory */
- if (state == ASCAN_QUOTED) PyMem_Free(token);
- if (obj == NULL) return 0;
-
- PyList_Append(array, obj);
- Py_DECREF(obj);
- }
-
- else if (state == ASCAN_BEGIN) {
- PyObject *sub = PyList_New(0);
- if (sub == NULL) return 0;
-
- PyList_Append(array, sub);
- Py_DECREF(sub);
-
- if (stack_index == MAX_DIMENSIONS)
- return 0;
-
- stack[stack_index++] = array;
- array = sub;
- }
-
- else if (state == ASCAN_ERROR) {
- return 0;
- }
-
- else if (state == ASCAN_END) {
- if (--stack_index < 0)
- return 0;
- array = stack[stack_index];
- }
-
- else if (state == ASCAN_EOF)
- break;
- }
-
- return 1;
-}
-
-
-/** GENERIC - a generic typecaster that can be used when no special actions
- have to be taken on the single items **/
-
-static PyObject *
-typecast_GENERIC_ARRAY_cast(char *str, int len, PyObject *curs)
-{
- PyObject *obj = NULL;
- PyObject *base = ((typecastObject*)((cursorObject*)curs)->caster)->bcast;
-
- Dprintf("typecast_GENERIC_ARRAY_cast: str = '%s', len = %d", str, len);
-
- if (str == NULL) {Py_INCREF(Py_None); return Py_None;}
- if (str[0] == '[')
- typecast_array_cleanup(&str, &len);
- if (str[0] != '{') {
- PyErr_SetString(Error, "array does not start with '{'");
- return NULL;
- }
-
- Dprintf("typecast_GENERIC_ARRAY_cast: str = '%s', len = %d", str, len);
-
- obj = PyList_New(0);
-
- /* scan the array skipping the first level of {} */
- if (typecast_array_scan(&str[1], len-2, curs, base, obj) == 0) {
- Py_DECREF(obj);
- obj = NULL;
- }
-
- return obj;
-}
-
-/** almost all the basic array typecasters are derived from GENERIC **/
-
-#define typecast_LONGINTEGERARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_INTEGERARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_FLOATARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_DECIMALARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_STRINGARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_UNICODEARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_BOOLEANARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_DATETIMEARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_DATEARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_TIMEARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_INTERVALARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_BINARYARRAY_cast typecast_GENERIC_ARRAY_cast
-#define typecast_ROWIDARRAY_cast typecast_GENERIC_ARRAY_cast
git://git.onelab.eu / plcapi.git / blobdiff