From c0e9790335313adb40435b6be06cc41114c0f2c9 Mon Sep 17 00:00:00 2001
From: Danny Holman <dholman@gymli.org>
Date: Wed, 17 May 2023 01:05:38 -0500
Subject: server: create utility functions

Create a new file for utility functions, including those that strip
whitespace from and break apart strings.

Signed-off-by: Danny Holman <dholman@gymli.org>
---
 server/Makefile.am    |  2 +-
 server/include/util.h |  5 ++++
 server/src/util.c     | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 79 insertions(+), 1 deletion(-)
 create mode 100644 server/src/util.c

diff --git a/server/Makefile.am b/server/Makefile.am
index 3ecc941..613cd6d 100644
--- a/server/Makefile.am
+++ b/server/Makefile.am
@@ -1,3 +1,3 @@
 bin_PROGRAMS = mratd
-mratd_SOURCES = src/mini-rat.c src/server.c src/logging.c src/session.c
+mratd_SOURCES = src/mini-rat.c src/server.c src/logging.c src/session.c src/util.c
 mratd_LDADD = -lpthread
diff --git a/server/include/util.h b/server/include/util.h
index edadc5a..39c130b 100644
--- a/server/include/util.h
+++ b/server/include/util.h
@@ -1,8 +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/server/src/util.c b/server/src/util.c
new file mode 100644
index 0000000..068da0a
--- /dev/null
+++ b/server/src/util.c
@@ -0,0 +1,73 @@
+#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 '\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 '\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) {
+        char *saveptr;
+        char *token = strtok_r(str, delim, &saveptr);
+        token = str_strip(token);
+        char **ret = NULL;
+        int count = -1;
+        while (token != NULL) {
+                count++;
+                ret = realloc(ret, sizeof(char*) * (count+1));
+                ret[count] = token;
+                token = strtok_r(NULL, delim, &saveptr);
+        }
+        return ret;
+}
-- 
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