Improved credentials parsing scalability

credentials.txt

@@ -1 +1 @@
-probotic
+username=probotic

include/parse.h

@@ -2,8 +2,8 @@
 
 typedef struct
 {
-    char * username;
-    char * password;
+  char * username;
+  char * password;
 } creds_t;
 
 DELC void parse_command(char  * cmd);

src/parse.c

@@ -24,6 +24,20 @@
 #include "parse.h"
 #include "error.h"
 
+#define PARAMS_COUNT 2
+
+enum cred_param_ids_e
+{
+  USERNAME,
+  PASSWORD 
+};
+
+/* TODO: move = to the handler */
+char const * cred_param_names_g[] = {
+  "username=",
+  "password="
+};
+
 DELC void
 parse_command(char * cmd)
 {
@@ -71,21 +85,39 @@ parse_creds(creds_t * creds,
   if (stream == NULL)
   { PERROR(PROGN); }
 
-  if (getline(&(creds->username), &nread, stream) < 1)
+  char * values[PARAMS_COUNT];
+  memset(values, 0, sizeof(char *) * PARAMS_COUNT);
+
+  char * line = NULL;
+  while (getline(&line, &nread, stream) > 0)
   {
-    ERRMSG("Cannot get username");
-    goto fail;
+    for (size_t i = 0; i < PARAMS_COUNT; i++)
+    {
+      size_t param_len = strlen(cred_param_names_g[i]);
+      
+      if (!strncmp(cred_param_names_g[i], line, param_len))
+      {
+        /* Starts with the current parameter specifier */
+        char const * val = line + param_len;
+        size_t val_len = strlen(val);
+        /* Duplicates and gets rid of a newline */
+        values[i] = strndup(val, val[val_len - 1] == '\n' ? val_len - 1 : val_len);
+        break;
+      }
+    }
+
+    free(line);
+    line = NULL;
+    nread = 0;
   }
+  creds->username = values[USERNAME];
+  creds->password = values[PASSWORD];
 
-  if (getline(&(creds->password), &nread, stream) < 1)
+  /* Check empty but required paramters */
+  if (!creds->username)
   {
-    /* Bot credentials file with an empty password is a valid case.
-     * Considering irc_connect api the pointer to the password should be NULL in that case.
-     */
-
-    /* Theoretically it can be allocated with an empty string */
-    free(creds->password);
-    creds->password = NULL;
+    ERRMSG("Could not parse bot login");
+    goto fail;
   }
 
   fclose(stream);