comparison: src/variables.cc
src/variables.cc
- changeset 75
- bf8c57437231
- child 85
- 264a61e9eba0
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| 74:007fbadfa7f9 | 75:bf8c57437231 |
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| 1 /* | |
| 2 Copyright (c) 2012-2014, Santeri Piippo | |
| 3 All rights reserved. | |
| 4 | |
| 5 Redistribution and use in source and binary forms, with or without | |
| 6 modification, are permitted provided that the following conditions are met: | |
| 7 | |
| 8 * Redistributions of source code must retain the above copyright | |
| 9 notice, this list of conditions and the following disclaimer. | |
| 10 | |
| 11 * Redistributions in binary form must reproduce the above copyright | |
| 12 notice, this list of conditions and the following disclaimer in the | |
| 13 documentation and/or other materials provided with the distribution. | |
| 14 | |
| 15 * Neither the name of the <organization> nor the | |
| 16 names of its contributors may be used to endorse or promote products | |
| 17 derived from this software without specific prior written permission. | |
| 18 | |
| 19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
| 20 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 21 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 22 DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY | |
| 23 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 24 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 25 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 26 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include <stdio.h> | |
| 32 #include <stdlib.h> | |
| 33 #include <string.h> | |
| 34 #include "object_writer.h" | |
| 35 #include "stringtable.h" | |
| 36 #include "variables.h" | |
| 37 #include "parser.h" | |
| 38 | |
| 39 list<script_variable> g_GlobalVariables; | |
| 40 list<script_variable> g_LocalVariables; | |
| 41 | |
| 42 // ============================================================================ | |
| 43 // Tries to declare a new global-scope variable. Returns pointer | |
| 44 // to new global variable, null if declaration failed. | |
| 45 script_variable* declare_global_variable (type_e type, string name) | |
| 46 { | |
| 47 // Unfortunately the VM does not support string variables so yeah. | |
| 48 if (type == TYPE_STRING) | |
| 49 error ("variables cannot be string\n"); | |
| 50 | |
| 51 // Check that the variable is valid | |
| 52 if (find_command_by_name (name)) | |
| 53 error ("name of variable-to-be `%s` conflicts with that of a command", name.chars()); | |
| 54 | |
| 55 if (IsKeyword (name)) | |
| 56 error ("name of variable-to-be `%s` is a keyword", name.chars()); | |
| 57 | |
| 58 if (g_GlobalVariables.size() >= g_max_global_vars) | |
| 59 error ("too many global variables!"); | |
| 60 | |
| 61 for (int i = 0; i < g_GlobalVariables.size(); i++) | |
| 62 if (g_GlobalVariables[i].name == name) | |
| 63 error ("attempted redeclaration of global variable `%s`", name.chars()); | |
| 64 | |
| 65 script_variable g; | |
| 66 g.index = g_GlobalVariables.size(); | |
| 67 g.name = name; | |
| 68 g.statename = ""; | |
| 69 g.value = 0; | |
| 70 g.type = type; | |
| 71 | |
| 72 g_GlobalVariables << g; | |
| 73 return &g_GlobalVariables[g.index]; | |
| 74 } | |
| 75 | |
| 76 // ============================================================================ | |
| 77 // Find a global variable by name | |
| 78 script_variable* find_global_variable (string name) | |
| 79 { | |
| 80 for (int i = 0; i < g_GlobalVariables.size(); i++) | |
| 81 { | |
| 82 script_variable* g = &g_GlobalVariables[i]; | |
| 83 | |
| 84 if (g->name == name) | |
| 85 return g; | |
| 86 } | |
| 87 | |
| 88 return null; | |
| 89 } |
