diff -r 2483f517c562 -r b5bb7b3cd597 libidav/davqlexec.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libidav/davqlexec.h	Mon Jan 22 17:27:47 2024 +0100
@@ -0,0 +1,187 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2018 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef DAVQLEXEC_H
+#define	DAVQLEXEC_H
+
+#include <stdarg.h>
+#include "davqlparser.h"
+#include "webdav.h"
+
+#include <cx/buffer.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+    
+typedef struct DavQLCmd      DavQLCmd;
+typedef struct DavQLStackObj DavQLStackObj;
+typedef struct DavQLRes      DavQLRes;
+
+typedef struct DavQLArg      DavQLArg;
+typedef struct DavQLArgList  DavQLArgList;
+
+typedef void*(*davql_func)(); // TODO: interface?
+
+struct DavQLArg {
+    int type;
+    union DavQLArgValue{
+        int          d;
+        unsigned int u;
+        char         *s;
+        time_t       t;
+    } value;
+    DavQLArg *next;
+};
+
+struct DavQLArgList {
+    DavQLArg *first;
+    DavQLArg *current;
+};
+
+typedef enum {
+    DAVQL_OK = 0,
+    DAVQL_UNSUPPORTED_FORMATCHAR,
+    DAVQL_UNKNOWN_FORMATCHAR,
+    DAVQL_OOM
+} davqlerror_t;
+
+typedef enum {
+    DAVQL_CMD_INT = 0,
+    DAVQL_CMD_STRING,
+    DAVQL_CMD_TIMESTAMP,
+    DAVQL_CMD_RES_IDENTIFIER,
+    DAVQL_CMD_PROP_IDENTIFIER,
+    //DAVQL_CMD_OP_UNARY_ADD,
+    DAVQL_CMD_OP_UNARY_SUB,
+    DAVQL_CMD_OP_UNARY_NEG,
+    DAVQL_CMD_OP_BINARY_ADD,
+    DAVQL_CMD_OP_BINARY_SUB,
+    DAVQL_CMD_OP_BINARY_MUL,
+    DAVQL_CMD_OP_BINARY_DIV,
+    DAVQL_CMD_OP_BINARY_AND,
+    DAVQL_CMD_OP_BINARY_OR,
+    DAVQL_CMD_OP_BINARY_XOR,
+    DAVQL_CMD_OP_LOGICAL_NOT,
+    DAVQL_CMD_OP_LOGICAL_AND,
+    DAVQL_CMD_OP_LOGICAL_OR_L,
+    DAVQL_CMD_OP_LOGICAL_OR,
+    DAVQL_CMD_OP_LOGICAL_XOR,
+    DAVQL_CMD_OP_EQ,
+    DAVQL_CMD_OP_NEQ,
+    DAVQL_CMD_OP_LT,
+    DAVQL_CMD_OP_GT,
+    DAVQL_CMD_OP_LE,
+    DAVQL_CMD_OP_GE,
+    DAVQL_CMD_OP_LIKE,
+    DAVQL_CMD_OP_UNLIKE,
+    DAVQL_CMD_CALL
+} davqlcmdtype_t;
+
+typedef enum {
+    DAVQL_RES_NAME = 0,
+    DAVQL_RES_PATH,
+    DAVQL_RES_HREF,
+    DAVQL_RES_CONTENTLENGTH,
+    DAVQL_RES_CONTENTTYPE,
+    DAVQL_RES_CREATIONDATE,
+    DAVQL_RES_LASTMODIFIED,
+    DAVQL_RES_ISCOLLECTION
+} davqlresprop_t;
+
+struct DavQLCmd {
+    davqlcmdtype_t type;
+    union DavQLCmdData {
+        int64_t        integer;
+        cxmutstr       string;
+        time_t         timestamp;
+        davqlresprop_t resprop;
+        DavPropName    property;
+        davql_func     func;
+    } data;
+};
+
+struct DavQLStackObj {
+    int32_t  type; // 0: int, 1: string, 2: xml
+    uint32_t length;
+    union DavQLStackData {
+        int64_t    integer;
+        char       *string;
+        DavXmlNode *node;
+    } data;
+};
+
+struct DavQLRes {
+    DavResource *resource;
+    int depth;
+};
+
+typedef struct DavCompiledField {
+    char *ns;
+    char *name;
+    CxBuffer *code;
+} DavCompiledField;
+
+typedef struct DavOrderCriterion {
+    int type; // 0: resprop, 1: property
+    union DavQLColumn {
+        davqlresprop_t resprop;
+        CxHashKey property;
+    } column;
+    _Bool descending;
+} DavOrderCriterion;
+
+DavQLArgList* dav_ql_get_args(DavQLStatement *st, va_list ap);
+void dav_ql_free_arglist(DavQLArgList *args);
+
+int dav_ql_getarg_int(DavQLArgList *args);
+unsigned int dav_ql_getarg_uint(DavQLArgList *args);
+char* dav_ql_getarg_str(DavQLArgList *args);
+time_t dav_ql_getarg_time(DavQLArgList *args);
+
+DavResult dav_statement_exec(DavSession *sn, DavQLStatement *st, ...);
+DavResult dav_statement_execv(DavSession *sn, DavQLStatement *st, va_list ap);
+
+CxBuffer* dav_path_string(cxmutstr src, DavQLArgList *args, davqlerror_t *error);
+cxmutstr dav_format_string(const CxAllocator *a, cxstring fstr, DavQLArgList *ap, davqlerror_t *error);
+
+DavResult dav_exec_select(DavSession *sn, DavQLStatement *st, va_list ap);
+
+int dav_identifier2resprop(cxstring src, davqlresprop_t *prop);
+
+CxBuffer* dav_compile_expr(DavContext *ctx, const CxAllocator *a, DavQLExpression *lexpr, DavQLArgList *ap);
+
+int dav_exec_expr(CxBuffer *bcode, DavResource *res, DavQLStackObj *result);
+
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* DAVQLEXEC_H */
+