common: create the common directory

Create a directory for files that are shared between the reference
client and server. Refactor the build scripts to reflect this
restructuring.

Signed-off-by: Danny Holman <dholman@gymli.org>

2 files changed, 97 insertions, 0 deletions

diff --git a/common/include/util.h b/common/include/util.h
new file mode 100644
index 0000000..39c130b
--- /dev/null
+++ b/common/include/util.h
@@ -0,0 +1,13 @@
+#ifndef MRAT_UTIL_H
+#define MRAT_UTIL_H
+
+#include <stddef.h>
+
+#define container_of(ptr, type, member) ({                      \
+        const typeof(((type*)0)->member)*__mptr = (ptr);        \
+        (type*)((char*)__mptr - offsetof(type, member)); })
+
+char* str_strip(char *str);
+char** str_split(char *str, const char *delim);
+
+#endif
diff --git a/common/src/util.c b/common/src/util.c
new file mode 100644
index 0000000..63eefa2
--- /dev/null
+++ b/common/src/util.c
@@ -0,0 +1,84 @@
+#include <util.h>
+#include <string.h>
+#include <stdlib.h>
+
+char* str_rstrip(char *str) {
+        size_t len = strlen(str) - 1;
+        int brakes = 1;
+        while (brakes) {
+                switch (str[len]) {
+                        case '\r':
+                                str[len] = '\0';
+                                len--;
+                                break;
+                        case '\n':
+                                str[len] = '\0';
+                                len--;
+                                break;
+                        case '\t':
+                                str[len] = '\0';
+                                len--;
+                                break;
+                        case ' ':
+                                str[len] = '\0';
+                                len--;
+                                break;
+                        default:
+                                brakes = 0;
+                                break;
+                }
+        }
+        return str;
+}
+
+char* str_lstrip(char *str) {
+        int brakes = 1;
+        while (brakes) {
+                switch (str[0]) {
+                        case '\r':
+                                str[0] = '\0';
+                                str++;
+                                break;
+                        case '\n':
+                                str[0] = '\0';
+                                str++;
+                                break;
+                        case '\t':
+                                str[0] = '\0';
+                                str++;
+                                break;
+                        case ' ':
+                                str[0] = '\0';
+                                str++;
+                                break;
+                        default:
+                                brakes = 0;
+                                break;
+                }
+        }
+        return str;
+}
+
+char* str_strip(char *str) {
+        str_rstrip(str);
+        str_lstrip(str);
+        return str;
+}
+
+char** str_split(char *str, const char *delim) {
+        size_t count = 0;
+        char **ret = NULL;
+        char *token;
+        char *saveptr;
+        token = strtok_r(str, delim, &saveptr);
+        while (token != NULL) {
+                count++;
+                ret = realloc(ret, sizeof(char*) * count);
+                ret[count-1] = strdup(str_strip(token));
+                token = strtok_r(NULL, delim, &saveptr);
+        }
+        count++;
+        ret = realloc(ret, sizeof(char*) * count);
+        ret[count-1] = NULL;
+        return ret;
+}