// This file is under GNU General Public License 3.0

 // see LICENSE.txt

 #include <stdbool.h>

 #include <stdlib.h>

 #include <assert.h>

 #include <string.h>

 #include "platform.h"

 #include "bloblist.h"

 static bool set_blob_data(bloblist_t* bloblist, char* blob, size_t size, const char* mime_type,

         const char* filename)

 {

     if (!bloblist)

         return false;

     if (mime_type) {

        bloblist->mime_type = strdup(mime_type);

        if (bloblist->mime_type == NULL) {

            return false;

        }

     }

     if (filename) {

        bloblist->filename = strdup(filename);

        if (bloblist->filename == NULL) {

            free(bloblist->mime_type);

            return false;

        }

        /* Default behaviour, can be overwritten post-allocation with

           set_blob_content_disposition */

        if (strncmp(filename, "cid://", 6) == 0)

            bloblist->disposition = PEP_CONTENT_DISP_INLINE;

     }               

     if (blob) {

         bloblist->value = blob;

         bloblist->size = size;

     }

     return true;

 }

 DYNAMIC_API bloblist_t *new_bloblist(char *blob, size_t size, const char *mime_type,

         const char *filename)

 {

     bloblist_t * bloblist = calloc(1, sizeof(bloblist_t));

     assert(bloblist);

     if (bloblist == NULL)

         return NULL;

     if (!set_blob_data(bloblist, blob, size, mime_type, filename)) {

         free(bloblist);

         bloblist = NULL;

     }

     return bloblist;

 }

 DYNAMIC_API void free_bloblist(bloblist_t *bloblist)

 {

     bloblist_t *curr = bloblist;

     while (curr) {

         bloblist_t *next = curr->next;

         if (curr->release_value)

             curr->release_value(curr->value);

         else

             free(curr->value);

         free(curr->mime_type);

         free(curr->filename);

         free(curr);

         curr = next;

     }

 }

 DYNAMIC_API bloblist_t *bloblist_dup(const bloblist_t *src)

 {

     assert(src);

     if (src == NULL)

         return NULL;

     bloblist_t *bloblist = NULL;

     // head

     char *blob2 = malloc(src->size);

     assert(blob2);

     if (blob2 == NULL)

         goto enomem;

     memcpy(blob2, src->value, src->size);

     bloblist = new_bloblist(blob2, src->size, src->mime_type, src->filename);

     if (bloblist == NULL)

         goto enomem;

     blob2 = NULL;

     bloblist_t* src_curr = src->next;

     bloblist_t** dst_curr_ptr = &bloblist->next;

     // list

     while (src_curr) {

         blob2 = malloc(src_curr->size);

         assert(blob2);

         if (blob2 == NULL)

             goto enomem;

         memcpy(blob2, src_curr->value, src_curr->size);

         *dst_curr_ptr = new_bloblist(blob2, src_curr->size, src_curr->mime_type, src_curr->filename);

         if (*dst_curr_ptr == NULL)

             goto enomem;

         src_curr = src_curr->next;

         dst_curr_ptr = &((*dst_curr_ptr)->next);

     }

     return bloblist;

 enomem:

     free(blob2);

     free_bloblist(bloblist);

     return NULL;

 }

 DYNAMIC_API bloblist_t *bloblist_add(bloblist_t *bloblist, char *blob, size_t size,

         const char *mime_type, const char *filename)

 {

     assert(blob);

     if (!blob)

         return NULL;

     if (!bloblist)

         return new_bloblist(blob, size, mime_type, filename);

     if (!bloblist->value) { // empty list

         assert(!bloblist->next);

         if (bloblist->next)

             return NULL; // invalid list

         if (!set_blob_data(bloblist, blob, size, mime_type, filename)) {

             free(bloblist);

             bloblist = NULL;

         }

         return bloblist;

     }

     bloblist_t* list_curr = bloblist;

     void (*release_value)(char *) = list_curr->release_value;

     while (list_curr->next)

         list_curr = list_curr->next;

     list_curr->next = new_bloblist(blob, size, mime_type, filename);

     list_curr->release_value = release_value;

     assert(list_curr->next);

     if (!list_curr->next)

         return NULL;

     return list_curr->next;

 }

 DYNAMIC_API int bloblist_length(const bloblist_t *bloblist)

 {

     int len = 0;

     for (const bloblist_t *_bl = bloblist; _bl && _bl->value; _bl = _bl->next)

         len++;

     return len;

 }

 DYNAMIC_API void set_blob_disposition(bloblist_t* blob, 

         content_disposition_type disposition)

 {

     if (blob)                                    

         blob->disposition = disposition;

 }