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RRTcodebaseC

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if (pathNfilename==NULL || buf==NULL || buf_bytes==NULL) {
return 0; /* do not go to cleanup as this would dereference "buf" and "buf_bytes" */
}
*buf = NULL;
*buf_bytes = 0;
if ((pathNfilename_abs=dc_get_abs_path(context, pathNfilename))==NULL) {
goto cleanup;
}
f = fopen(pathNfilename_abs, "rb");
if (f==NULL) { goto cleanup; }
fseek(f, 0, SEEK_END);
*buf_bytes = ftell(f);
fseek(f, 0, SEEK_SET);
if (*buf_bytes<=0) { goto cleanup; }
*buf = malloc( (*buf_bytes) + 1 /*be pragmatic and terminate all files by a null - fine for texts and does not hurt for the rest */);
if (*buf==NULL) { goto cleanup; }
((char*)*buf)[*buf_bytes /*we allocated one extra byte above*/] = 0;
if (fread(*buf, 1, *buf_bytes, f)!=*buf_bytes) { goto cleanup; }
success = 1;
cleanup:
if (f) {
fclose(f);
}
if (success==0) {
free(*buf);
*buf = NULL;
*buf_bytes = 0;
dc_log_warning(context, 0, "Cannot read \"%s\" or file is empty.", pathNfilename);
}
free(pathNfilename_abs);
return success; /* buf must be free()'d by the caller */
}
char* dc_get_fine_pathNfilename(dc_context_t* context, const char* pathNfolder, const char* desired_filenameNsuffix__)
{
char* ret = NULL;
char* pathNfolder_wo_slash = NULL;
char* filenameNsuffix = NULL;
char* basename = NULL;
char* dotNSuffix = NULL;
time_t now = time(NULL);
int i = 0;
pathNfolder_wo_slash = dc_strdup(pathNfolder);
dc_ensure_no_slash(pathNfolder_wo_slash);
filenameNsuffix = dc_strdup(desired_filenameNsuffix__);
dc_validate_filename(filenameNsuffix);
dc_split_filename(filenameNsuffix, &basename, &dotNSuffix);
for (i = 0; i < 1000 /*no deadlocks, please*/; i++) {
if (i) {
time_t idx = i<100? i : now+i;
ret = dc_mprintf("%s/%s-%lu%s", pathNfolder_wo_slash, basename, (unsigned long)idx, dotNSuffix);
}
else {
ret = dc_mprintf("%s/%s%s", pathNfolder_wo_slash, basename, dotNSuffix);
}
if (!dc_file_exist(context, ret)) {
goto cleanup; /* fine filename found */
}
free(ret); /* try over with the next index */
ret = NULL;
}
cleanup:
free(filenameNsuffix);
free(basename);
free(dotNSuffix);
free(pathNfolder_wo_slash);
return ret;
}
void dc_make_rel_path(dc_context_t* context, char** path)
{
if (context==NULL || path==NULL || *path==NULL) {
return;
}
if (strncmp(*path, context->blobdir, strlen(context->blobdir))==0) {
dc_str_replace(path, context->blobdir, "$BLOBDIR");
}
}
/**
* Check if a path describes a file in the blob directory.
* The path can be absolute or relative (starting with `$BLOBDIR`).
* The function does not check if the file really exists.