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UCX string module update
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2015 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include "davqlparser.h" |
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30 | #include <string.h> |
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31 | #include <stdio.h> |
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32 | |
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33 | #define sfmtarg(s) ((int)(s).length), (s).ptr |
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34 | |
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35 | static const char* _map_querytype(davqltype_t type) { |
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36 | switch(type) { |
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37 | case GET: return "GET"; |
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38 | case SET: return "SET"; |
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39 | default: return "unknown"; |
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40 | } |
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41 | } |
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42 | |
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43 | static const char* _map_exprtype(davqlexprtype_t type) { |
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44 | switch(type) { |
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45 | case LITERAL: return "LITERAL"; |
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46 | case IDENTIFIER: return "IDENTIFIER"; |
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47 | case UNARY: return "UNARY"; |
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48 | case BINARY: return "BINARY"; |
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49 | case LOGICAL: return "LOGICAL"; |
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50 | case FUNCCALL: return "FUNCCALL"; |
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51 | default: return "unknown"; |
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52 | } |
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53 | } |
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54 | |
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55 | static const char* _map_operator(davqloperator_t op) { |
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56 | // don't use string array, because enum values may change |
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57 | switch(op) { |
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58 | case ADD: return "+"; case SUB: return "-"; case MUL: return "*"; |
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59 | case DIV: return "/"; case AND: return "&"; case OR: return "|"; |
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60 | case XOR: return "^"; case NEG: return "~"; case NOT: return "NOT"; |
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61 | case LAND: return "AND"; case LOR: return "OR"; case LXOR: return "XOR"; |
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62 | case EQ: return "="; case NEQ: return "!="; case LT: return "<"; |
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63 | case GT: return ">"; case LE: return "<="; case GE: return ">="; |
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64 | case LIKE: return "LIKE"; case UNLIKE: return "UNLIKE"; |
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65 | default: return "unknown"; |
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66 | } |
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67 | } |
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68 | |
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69 | static void dav_debug_ql_stmt_print(DavQLStatement *stmt) { |
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70 | |
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71 | // Basic information |
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72 | printf("Statement: %*s\nType: %s\nField count: %zu", |
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73 | sfmtarg(stmt->srctext), |
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74 | _map_querytype(stmt->type), |
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75 | ucx_list_size(stmt->fields)); |
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76 | |
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77 | // Has wildcard |
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78 | _Bool wildcard = 0; |
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79 | UCX_FOREACH(elm, stmt->fields) { |
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80 | DavQLExpression* expr = (DavQLExpression*)elm->data; |
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81 | if (expr->type == IDENTIFIER && |
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82 | expr->srctext.length == 1 && *(expr->srctext.ptr) == '*') { |
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83 | wildcard = 1; |
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84 | } |
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85 | } |
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86 | printf(" %s wildcard\nPath: %*s\nHas where clause: %s\n", |
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87 | wildcard?"with":"without", |
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88 | sfmtarg(stmt->path.srctext), |
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89 | stmt->where ? "yes" : "no"); |
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90 | if (stmt->type == SET) { |
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91 | printf("Value list size matches: %s", |
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92 | ucx_list_size(stmt->fields) == ucx_list_size(stmt->setvalues) |
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93 | ? "yes" : "no"); |
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94 | } |
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95 | |
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96 | // WITH attributes |
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97 | if (stmt->depth == SIZE_MAX) { |
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98 | printf("Depth: unbound\n"); |
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99 | } else { |
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100 | printf("Depth: %zu\n", stmt->depth); |
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101 | } |
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102 | } |
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103 | |
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104 | static int dav_debug_ql_expr_selected(DavQLExpression *expr) { |
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105 | if (!expr) { |
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106 | printf("Currently no expression selected.\n"); |
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107 | return 0; |
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108 | } else { |
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109 | return 1; |
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110 | } |
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111 | } |
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112 | |
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113 | static void dav_debug_ql_expr_print(DavQLExpression *expr) { |
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114 | if (dav_debug_ql_expr_selected(expr)) { |
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115 | sstr_t empty = S("(empty)"); |
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116 | printf( |
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117 | "Text: %*s\nType: %s\nOperator: %s\n" |
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118 | "Left hand: %*s\nRight hand: %*s\n", |
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119 | sfmtarg(expr->srctext), |
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120 | _map_exprtype(expr->type), |
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121 | _map_operator(expr->op), |
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122 | sfmtarg(expr->left?expr->left->srctext:empty), |
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123 | sfmtarg(expr->right?expr->right->srctext:empty)); |
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124 | } |
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125 | } |
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126 | |
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127 | #define DQLD_CMD_Q 0 |
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128 | #define DQLD_CMD_PS 1 |
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129 | #define DQLD_CMD_PE 2 |
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130 | #define DQLD_CMD_P 10 |
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131 | #define DQLD_CMD_L 21 |
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132 | #define DQLD_CMD_R 22 |
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133 | #define DQLD_CMD_H 100 |
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134 | |
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135 | static int dav_debug_ql_command() { |
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136 | printf("> "); |
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137 | |
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138 | char buffer[16]; |
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139 | fgets(buffer, 16, stdin); |
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140 | if (!strcmp(buffer, "q\n")) { |
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141 | return DQLD_CMD_Q; |
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142 | } else if (!strcmp(buffer, "ps\n")) { |
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143 | return DQLD_CMD_PS; |
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144 | } else if (!strcmp(buffer, "pe\n")) { |
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145 | return DQLD_CMD_PE; |
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146 | } else if (!strcmp(buffer, "p\n")) { |
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147 | return DQLD_CMD_P; |
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148 | } else if (!strcmp(buffer, "l\n")) { |
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149 | return DQLD_CMD_L; |
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150 | } else if (!strcmp(buffer, "r\n")) { |
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151 | return DQLD_CMD_R; |
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152 | } else if (!strcmp(buffer, "h\n")) { |
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153 | return DQLD_CMD_H; |
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154 | } else { |
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155 | return -1; |
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156 | } |
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157 | } |
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158 | |
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159 | void dav_debug_ql_statement(DavQLStatement *stmt) { |
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160 | if (!stmt) { |
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161 | fprintf(stderr, "Debug DavQLStatement failed: null pointer"); |
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162 | return; |
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163 | } |
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164 | |
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165 | printf("Starting DavQL debugger (type 'h' for help)...\n\n"); |
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166 | dav_debug_ql_stmt_print(stmt); |
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167 | |
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168 | DavQLExpression *examineexpr = NULL; |
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169 | |
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170 | while(1) { |
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171 | int cmd = dav_debug_ql_command(); |
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172 | switch (cmd) { |
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173 | case DQLD_CMD_Q: return; |
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174 | case DQLD_CMD_PS: dav_debug_ql_stmt_print(stmt); break; |
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175 | case DQLD_CMD_PE: dav_debug_ql_expr_print(examineexpr); break; |
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176 | case DQLD_CMD_P: |
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177 | examineexpr = &(stmt->path); |
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178 | dav_debug_ql_expr_print(examineexpr); |
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179 | break; |
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180 | case DQLD_CMD_L: |
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181 | if (dav_debug_ql_expr_selected(examineexpr)) { |
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182 | if (examineexpr->left) { |
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183 | examineexpr = examineexpr->left; |
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184 | dav_debug_ql_expr_print(examineexpr); |
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185 | } else { |
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186 | printf("There is no left subtree.\n"); |
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187 | } |
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188 | } |
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189 | break; |
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190 | case DQLD_CMD_R: |
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191 | if (dav_debug_ql_expr_selected(examineexpr)) { |
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192 | if (examineexpr->right) { |
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193 | examineexpr = examineexpr->right; |
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194 | dav_debug_ql_expr_print(examineexpr); |
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195 | } else { |
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196 | printf("There is no right subtree.\n"); |
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197 | } |
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198 | } |
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199 | break; |
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200 | case DQLD_CMD_H: |
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201 | printf( |
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202 | "\nCommands:\n" |
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203 | "p: examine path\n" |
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204 | "ps: print statement information\n" |
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205 | "q: quit\n\n" |
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206 | "\nExpression examination:\n" |
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207 | "pe: print expression information\n" |
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208 | "l: enter left subtree\n" |
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209 | "r: enter right subtree\n"); |
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210 | break; |
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211 | default: printf("unknown command\n"); |
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212 | } |
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213 | } |
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214 | } |
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215 | |
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216 | DavQLStatement* dav_parse_statement(sstr_t srctext) { |
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217 | DavQLStatement *stmt = malloc(sizeof(DavQLStatement)); |
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218 | |
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219 | // default values |
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220 | memset(stmt, 0, sizeof(DavQLStatement)); |
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221 | stmt->srctext = srctext; |
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222 | stmt->type = stmt->path.type = stmt->path.op = -1; |
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223 | stmt->depth = SIZE_MAX; |
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224 | |
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225 | |
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226 | return stmt; |
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227 | } |