Made the configurationfile parser

1 files changed, 125 insertions, 19 deletions

diff --git a/src/miav_config.cc b/src/miav_config.cc
index 2af0ef1..9364131 100644
--- a/src/miav_config.cc
+++ b/src/miav_config.cc
@@ -30,27 +30,24 @@ MiavConfig::MiavConfig(char *file)
 {
   configs = NULL;
 
-  _cfg *cfg;
-
-  // TODO: Read config from file.
-
-  // Add a config
-  configs = cfg = (_cfg*) malloc(sizeof(_cfg));
-  cfg->name = new string("cpr_host");
-  cfg->stringval = new string("cpr.j.auh.dk");
-  cfg->next = (_cfg*) malloc(sizeof(_cfg));
+  // Read config file
+  FILE* fp = fopen(file, "r");
+  
+  if(!fp) {
+    fprintf(stderr, "Error reading configuration file %s\n", file);
+    return;
+  }
+  fseek(fp, 0, SEEK_END);
+  int fsz = ftell(fp);
+  fseek(fp, 0, SEEK_SET);
+  
+  char *raw = (char*)calloc(fsz, 1);
+  fread(raw, 1, fsz, fp);
 
-  // Add another config
-  cfg = cfg->next;
-  cfg->name = new string("cpr_port");
-  cfg->intval = 10301;
-  cfg->next = (_cfg*) malloc(sizeof(_cfg));
+  fclose(fp);
 
-  // Add another config
-  cfg = cfg->next;
-  cfg->name = new string("screensize");
-  cfg->floatval = 19.0f;
-  cfg->next = NULL;
+  parse(raw);
+  free(raw);
 }
 
 MiavConfig::~MiavConfig()
@@ -66,6 +63,115 @@ MiavConfig::~MiavConfig()
   if(die) free(die);
 }
 
+_cfg *MiavConfig::addConfig(_cfg *parent, char* conf)
+{
+  _cfg *cfg;
+
+  printf("[%s]\n", conf);
+
+  cfg = (_cfg*) malloc(sizeof(_cfg));
+  if(!parent) configs = cfg;
+
+  int namelen = strchr(conf, '=') - conf;
+  char* name = (char*)calloc(namelen + 1, 1);
+  strncpy(name, conf, namelen);
+  printf("name [%s]#%d - ", name, namelen);
+
+  int vallen = conf + strlen(conf) - (strchr(conf, '=') + 1);
+  char* val = (char*)calloc(vallen + 1, 1);
+  strncpy(val, conf + strlen(conf) - vallen, vallen);
+  printf("val [%s]#%d\n", val, vallen);
+
+  cfg->name = new string((const char*)name);
+  free(name);
+
+  cfg->stringval = new string((const char*)val);
+  cfg->intval = atoi(val);
+  cfg->floatval = atof(val);
+  cfg->boolval = atoi(val) != 0;
+  free(val);
+
+  cfg->next = NULL;
+
+  if(parent) parent->next = cfg;
+  return cfg;
+}
+
+int MiavConfig::parse(char* raw)
+{
+  // Strip the string
+  char *conf = strip(raw);
+  char *conf_end = conf + strlen(conf);
+  char *start = conf;
+  char *p;
+
+  _cfg *cfg = NULL;
+
+  // Iterate the lines in the string
+  for(p = conf; p < conf_end; p++) {
+    if(*p == '\n') {
+      *p = '\0';
+      cfg = addConfig(cfg, start);
+      start = p+1;
+    }
+  }
+  free(conf);
+  printf("done!\n");
+  return 0;
+}
+
+char* MiavConfig::strip(char* conf)
+{
+  char *stripped = (char*)calloc(strlen(conf) + 2, 1);
+  char *r;
+  char *w = stripped;
+
+  bool instring = false;
+  bool incomment = false;
+
+  // Iterate over the characters in the input string.
+  for(r = conf; r < conf + strlen(conf); r++) {
+    if(strchr("#", *r)) incomment = true;
+    if(strchr("\n", *r)) incomment = false;
+
+    if(!incomment) {
+      if(instring) {
+        // When in a string, accept anything, except ".
+        if(*r != '\"') {
+          *w = *r;
+          w++;
+        }
+      } else {
+        // Only copy valid characters
+        if(strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890-_,.=", *r)) {
+          // Change comma into dot
+          if(*r == ',') *r = '.';
+          *w = *r;
+          w++;
+        }
+        // We don't want double newlines and initial newline!
+        if((*r == '\n') && (*(w-1) != '\n') && (w != stripped)) {
+          *w = *r;
+          w++;
+        }
+      }
+    }
+
+    if(strchr("\"", *r)) instring = !instring;
+  }
+
+  // If we are not ending on a newline, we better append one
+  if(*(w-1) != '\n') {
+    *w = '\n';
+    w++;
+  }
+
+  // Make sure we are nullterminated.
+  *w = '\0';
+
+  return stripped;
+}
+
 int MiavConfig::readInt(char *node)
 {
   return findNode(node)->intval;