Added minimum transfer size in TransferDataStruct

Doxyfile

@@ -901,7 +901,7 @@ EXCLUDE_PATTERNS       =
 # Note that the wildcards are matched against the file with absolute path, so to
 # exclude all test directories use the pattern */test/*
 
-EXCLUDE_SYMBOLS        = CALLOC lprintf
+EXCLUDE_SYMBOLS        = CALLOC lprintf FREE
 
 # The EXAMPLE_PATH tag can be used to specify one or more files or directories
 # that contain example code fragments that are included (see the \include

src/link.c

@@ -113,7 +113,7 @@ static void Link_req_file_stat(Link * this_link)
      *
      * It gets freed in curl_multi_perform_once();
      */
-    TransferStruct *transfer = CALLOC(1, sizeof(TransferStruct));
+    TransferStatusStruct *transfer = CALLOC(1, sizeof(TransferStatusStruct));
 
     transfer->link = this_link;
     transfer->type = FILESTAT;
@@ -434,12 +434,12 @@ void LinkTable_print(LinkTable * linktbl)
     }
 }
 
-DataStruct Link_to_DataStruct(Link * head_link)
+TransferDataStruct Link_to_TransferDataStruct(Link * head_link)
 {
     char *url = head_link->f_url;
     CURL *curl = Link_to_curl(head_link);
 
-    DataStruct buf;
+    TransferDataStruct buf;
     buf.size = 0;
     buf.data = NULL;
 
@@ -493,7 +493,7 @@ LinkTable *LinkTable_new(const char *url)
     /*
      * start downloading the base URL
      */
-    DataStruct buf = Link_to_DataStruct(linktbl->links[0]);
+    TransferDataStruct buf = Link_to_TransferDataStruct(linktbl->links[0]);
     if (buf.size == 0) {
         LinkTable_free(linktbl);
         return NULL;
@@ -792,7 +792,7 @@ Link *path_to_Link(const char *path)
 }
 
 long
-path_download(const char *path, char *output_buf, size_t size,
+path_download(const char *path, char *output_buf, size_t req_size,
               off_t offset)
 {
     if (!path) {
@@ -805,12 +805,12 @@ path_download(const char *path, char *output_buf, size_t size,
     }
 
     size_t start = offset;
-    size_t end = start + size;
+    size_t end = start + req_size;
     char range_str[64];
     snprintf(range_str, sizeof(range_str), "%lu-%lu", start, end);
     lprintf(debug, "path_download(%s, %s);\n", path, range_str);
 
-    DataStruct buf;
+    TransferDataStruct buf;
     buf.size = 0;
     buf.data = NULL;
 
@@ -818,7 +818,7 @@ path_download(const char *path, char *output_buf, size_t size,
     curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *) &buf);
     curl_easy_setopt(curl, CURLOPT_RANGE, range_str);
 
-    DataStruct header;
+    TransferDataStruct header;
     header.size = 0;
     header.data = NULL;
     curl_easy_setopt(curl, CURLOPT_HEADERDATA, (void *) &header);
@@ -849,18 +849,19 @@ range requests\n");
         return -ENOENT;
     }
 
-    double dl;
-    curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &dl);
+    curl_off_t recv;
+    curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD_T, &recv);
 
-    size_t recv = dl;
-    if (recv > size) {
-        recv = size;
+    /* The extra 1 byte is probably for '\0' */
+    if (recv - 1 == (long int) req_size) {
+        recv--;
+    } else {
+        lprintf(error, "req_size: %lu, recv: %ld\n", req_size, recv);
     }
 
     memmove(output_buf, buf.data, recv);
     curl_easy_cleanup(curl);
     FREE(buf.data);
 
-    lprintf(debug, "recv: %lu bytes\n", recv);
     return recv;
 }

src/link.h

@@ -23,11 +23,15 @@ typedef enum {
     LINK_UNINITIALISED_FILE = 'U'
 } LinkType;
 
-/** \brief for storing downloaded data in memory */
+/** \brief For storing transfer data */
 typedef struct {
+    /** \brief The array to store the data */
     char *data;
+    /** \brief The size of the array */
     size_t size;
-} DataStruct;
+    /** \brief The minium requested size */
+    size_t min_req_size;
+} TransferDataStruct;
 
 /** \brief specify the type of data transfer */
 typedef enum {
@@ -35,12 +39,12 @@ typedef enum {
     DATA = 'd'
 } TransferType;
 
-/** \brief for storing the link being transferred, and metadata */
+/** \brief For storing transfer status and metadata */
 typedef struct {
     TransferType type;
     int transferring;
     Link *link;
-} TransferStruct;
+} TransferStatusStruct;
 
 /**
  * \brief link table type
@@ -145,9 +149,9 @@ LinkTable *LinkTable_disk_open(const char *dirn);
 
 /**
  * \brief Download a link's content to the memory
- * \warning You MUST free the memory field in DataStruct after use!
+ * \warning You MUST free the memory field in TransferDataStruct after use!
  */
-DataStruct Link_to_DataStruct(Link * head_link);
+TransferDataStruct Link_to_TransferDataStruct(Link * head_link);
 
 /**
  * \brief Allocate a LinkTable

src/log.h

@@ -18,7 +18,7 @@ typedef enum {
 /**
  * \brief The default log level
  */
-#define DEFAULT_LOG_LEVEL fatal | error | warning | info
+#define DEFAULT_LOG_LEVEL fatal | error | warning | info | debug
 
 /**
  * \brief Get the log level from the environment.

src/network.c

@@ -117,7 +117,7 @@ curl_process_msgs(CURLMsg * curl_msg, int n_running_curl, int n_mesgs)
     (void) n_mesgs;
     static volatile int slept = 0;
     if (curl_msg->msg == CURLMSG_DONE) {
-        TransferStruct *transfer;
+        TransferStatusStruct *transfer;
         CURL *curl = curl_msg->easy_handle;
         curl_easy_getinfo(curl_msg->easy_handle, CURLINFO_PRIVATE,
                           &transfer);
@@ -311,7 +311,7 @@ void transfer_blocking(CURL * curl)
      * We don't need to malloc here, as the transfer is finished before
      * the variable gets popped from the stack
      */
-    volatile TransferStruct transfer;
+    volatile TransferStatusStruct transfer;
     transfer.type = DATA;
     transfer.transferring = 1;
     curl_easy_setopt(curl, CURLOPT_PRIVATE, &transfer);
@@ -357,7 +357,7 @@ write_memory_callback(void *contents, size_t size, size_t nmemb,
                       void *userp)
 {
     size_t realsize = size * nmemb;
-    DataStruct *mem = (DataStruct *) userp;
+    TransferDataStruct *mem = (TransferDataStruct *) userp;
 
     mem->data = realloc(mem->data, mem->size + realsize + 1);
     if (!mem->data) {

src/sonic.c

@@ -332,7 +332,7 @@ static LinkTable *sonic_url_to_LinkTable(const char *url,
     /*
      * start downloading the base URL
      */
-    DataStruct xml = Link_to_DataStruct(linktbl->links[0]);
+    TransferDataStruct xml = Link_to_TransferDataStruct(linktbl->links[0]);
     if (xml.size == 0) {
         LinkTable_free(linktbl);
         return NULL;