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Removed unnecessary NULLings of pointers, explained kept ones.
[plomrogue] / src / client / command_db.c
1 /* src/client/command_db.c */
2
3 #include "command_db.h"
4 #include <stddef.h> /* NULL */
5 #include <stdint.h> /* uint8_t, uint32_t */
6 #include <stdio.h> /* FILE */
7 #include <stdlib.h> /* free() */
8 #include <string.h> /* memcpy(), strlen(), strtok(), strcmp() */
9 #include "../common/readwrite.h" /* try_fopen(), try_fclose(), try_fgets()
10                                   * textfile_sizes()
11                                   */
12 #include "../common/rexit.h" /* for exit_err() */
13 #include "../common/try_malloc.h" /* try_malloc() */
14 #include "cleanup.h" /* set_cleanup_flag() */
15 #include "world.h" /* global world */
16
17
18
19 /* Point "ch_ptr" to next strtok() string in "line" delimited by "delim".*/
20 static void copy_tokenized_string(char * line, char ** ch_ptr, char * delim);
21
22
23
24 static void copy_tokenized_string(char * line, char ** ch_ptr, char * delim)
25 {
26     char * f_name = "copy_tokenized_string()";
27     char * dsc_ptr = strtok(line, delim);
28     * ch_ptr = try_malloc(strlen(dsc_ptr) + 1, f_name);
29     memcpy(* ch_ptr, dsc_ptr, strlen(dsc_ptr) + 1);
30 }
31
32
33
34 extern struct Command * get_command(char * dsc_short)
35 {
36     struct Command * cmd_ptr = world.cmd_db.cmds;
37     uint8_t i = 0;
38     while (i < world.cmd_db.n)
39     {
40         if (0 == strcmp(dsc_short, cmd_ptr->dsc_short))
41         {
42             break;
43         }
44         cmd_ptr = &cmd_ptr[1];
45         i++;
46     }
47     char * err_start = "get_command_data() failed on request for: ";
48     char err[strlen(err_start) + strlen(dsc_short) + 1];
49     sprintf(err, "%s%s", err_start, dsc_short);
50     exit_err(i == world.cmd_db.n, err);
51     return cmd_ptr;
52 }
53
54
55
56 extern void init_command_db()
57 {
58     char * f_name = "init_command_db()";
59     char * path = "confclient/commands";
60     FILE * file = try_fopen(path, "r", f_name);
61     uint32_t lines;
62     uint32_t linemax = textfile_sizes(file, &lines);
63     char line[linemax + 1];
64     world.cmd_db.cmds = try_malloc(lines * sizeof(struct Command), f_name);
65     uint8_t i = 0;
66     char * delim = " ";
67     while (try_fgets(line, linemax + 1, file, f_name))
68     {
69         if ('\n' == line[0] || 0 == line[0])
70         {
71             break;
72         }
73         copy_tokenized_string(line, &world.cmd_db.cmds[i].dsc_short, delim);
74         copy_tokenized_string(NULL, &world.cmd_db.cmds[i].server_msg, delim);
75         if (!strcmp("0", world.cmd_db.cmds[i].server_msg))
76         {                                          /* .server_msg==0 detects  */
77             free(world.cmd_db.cmds[i].server_msg); /* non-server commands in  */
78             world.cmd_db.cmds[i].server_msg = NULL;/* control.h's try_key() / */
79         }                                          /* try_server_command().   */
80         char * arg_string = strtok(NULL, delim);
81         world.cmd_db.cmds[i].arg = arg_string[0];
82         copy_tokenized_string(NULL, &world.cmd_db.cmds[i].dsc_long, "\n");
83         i++;
84     }
85     try_fclose(file, f_name);
86     world.cmd_db.n = lines;
87     set_cleanup_flag(CLEANUP_COMMANDS);
88 }
89
90
91
92 extern void free_command_db()
93 {
94     uint8_t i = 0;
95     while (i < world.cmd_db.n)
96     {
97         free(world.cmd_db.cmds[i].dsc_short);
98         free(world.cmd_db.cmds[i].dsc_long);
99         free(world.cmd_db.cmds[i].server_msg);
100         i++;
101     }
102     free(world.cmd_db.cmds);
103 }