add readme and fix some warnings

4 files changed, 40 insertions, 8 deletions

diff --git a/README.md b/README.md
index bc2ee88..a2a5395 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,35 @@
 # autodarkmode
 
-A description of this project.
+A simple tool to switch between dark and light mode.
+
+It executes a command on switch and nothing else.
+Location is either specified by the user or 
+
+# Building
+```
+meson setup _build
+cd build
+meson compile
+```
+the resulting binary `src/autodarkmode` can then be moved to any directory in PATH.
+
+# Configuration
+```ini
+[main]
+; can be 'manual' or 'gclue'
+locationtype = "manual"
+
+[manual]
+; set latitude and longitude in case that locationtype is set to manual
+latitude = -10.0
+longitude = -5.0
+
+[light]
+; command to execute for light mode
+cmd = "notify-send 'a'"
+
+[dark]
+; command to execute for dark mode
+cmd = "notify-send 'b'"
+```
+autodarkmode expects to find this configuration in `$XDG_CONFIG_HOME/autodarkmode/config.ini`, in the case that XDG_CONFIG_HOME is empty, it will use `~/.config/autodarkmode/config.ini`
diff --git a/src/configuration.c b/src/configuration.c
index 6196e26..7d978f6 100644
--- a/src/configuration.c
+++ b/src/configuration.c
@@ -63,7 +63,7 @@ config_get_location_type(dictionary *d)
     if (d == NULL)
         return GCLUE;
 
-    char *loctype = iniparser_getstring (d, "main:locationtype", "gclue");
+    const char *loctype = iniparser_getstring (d, "main:locationtype", "gclue");
 
     if (strcmp(strlwr(loctype), "gclue") == 0) {
         return GCLUE;
diff --git a/src/extString.c b/src/extString.c
index b32b380..e7ebeaa 100644
--- a/src/extString.c
+++ b/src/extString.c
@@ -21,7 +21,7 @@
 #include <string.h>
 #include <ctype.h>
 
-char *strlwr(char *s)
+const char *strlwr(const char *s)
 {
   unsigned char *p = (unsigned char *)s;
 
@@ -33,7 +33,7 @@ char *strlwr(char *s)
   return s;
 }
 
-char *trim(char *s)
+char *trim(const char *s)
 {
   char *result = strdup(s);
   char *end;
@@ -51,7 +51,7 @@ char *trim(char *s)
   return result;
 }
 
-char *replaceStr(char *s, char *old, char *replace) {
+char *replaceStr(const char *s, const char *old, const char *replace) {
   char* result; 
   int i, cnt = 0; 
   size_t newSize = strlen(replace); 
diff --git a/src/extString.h b/src/extString.h
index 66149f1..d621792 100644
--- a/src/extString.h
+++ b/src/extString.h
@@ -1,3 +1,3 @@
-char *strlwr(char *s);
-char *trim(char *s);
-char *replaceStr(char *s, char *old, char *replace);
+const char *strlwr(const char *s);
+char *trim(const char *s);
+char *replaceStr(const char *s, const char *old, const char *replace);