diff options
Diffstat (limited to 'src/core/lib/support/load_file.c')
-rw-r--r-- | src/core/lib/support/load_file.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/core/lib/support/load_file.c b/src/core/lib/support/load_file.c new file mode 100644 index 0000000000..0cecd5edd5 --- /dev/null +++ b/src/core/lib/support/load_file.c @@ -0,0 +1,91 @@ +/* + * + * Copyright 2015-2016, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "src/core/lib/support/load_file.h" + +#include <errno.h> +#include <string.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/log.h> +#include <grpc/support/string_util.h> + +#include "src/core/lib/support/block_annotate.h" +#include "src/core/lib/support/string.h" + +gpr_slice gpr_load_file(const char *filename, int add_null_terminator, + int *success) { + unsigned char *contents = NULL; + size_t contents_size = 0; + char *error_msg = NULL; + gpr_slice result = gpr_empty_slice(); + FILE *file; + size_t bytes_read = 0; + + GRPC_SCHEDULING_START_BLOCKING_REGION; + file = fopen(filename, "rb"); + if (file == NULL) { + gpr_asprintf(&error_msg, "Could not open file %s (error = %s).", filename, + strerror(errno)); + GPR_ASSERT(error_msg != NULL); + goto end; + } + fseek(file, 0, SEEK_END); + /* Converting to size_t on the assumption that it will not fail */ + contents_size = (size_t)ftell(file); + fseek(file, 0, SEEK_SET); + contents = gpr_malloc(contents_size + (add_null_terminator ? 1 : 0)); + bytes_read = fread(contents, 1, contents_size, file); + if (bytes_read < contents_size) { + GPR_ASSERT(ferror(file)); + gpr_asprintf(&error_msg, "Error %s occured while reading file %s.", + strerror(errno), filename); + GPR_ASSERT(error_msg != NULL); + goto end; + } + if (success != NULL) *success = 1; + if (add_null_terminator) { + contents[contents_size++] = 0; + } + result = gpr_slice_new(contents, contents_size, gpr_free); + +end: + if (error_msg != NULL) { + gpr_log(GPR_ERROR, "%s", error_msg); + gpr_free(error_msg); + if (success != NULL) *success = 0; + } + if (file != NULL) fclose(file); + GRPC_SCHEDULING_END_BLOCKING_REGION; + return result; +} |