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/*
* blogc: A blog compiler.
* Copyright (C) 2014-2019 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "file.h"
#include "error.h"
#include "utf8.h"
#include "utils.h"
char*
bc_file_get_contents(const char *path, bool utf8, size_t *len, bc_error_t **err)
{
if (path == NULL || len == NULL || err == NULL || *err != NULL)
return NULL;
*len = 0;
FILE *fp = fopen(path, "r");
if (fp == NULL) {
int tmp_errno = errno;
*err = bc_error_new_printf(BC_ERROR_FILE,
"Failed to open file (%s): %s", path, strerror(tmp_errno));
return NULL;
}
bc_string_t *str = bc_string_new();
char buffer[BC_FILE_CHUNK_SIZE];
char *tmp;
while (!feof(fp)) {
size_t read_len = fread(buffer, sizeof(char), BC_FILE_CHUNK_SIZE, fp);
tmp = buffer;
if (utf8 && str->len == 0 && read_len > 0) {
// skipping BOM before validation, for performance. should be safe
// enough
size_t skip = bc_utf8_skip_bom((uint8_t*) buffer, read_len);
read_len -= skip;
tmp += skip;
}
*len += read_len;
bc_string_append_len(str, tmp, read_len);
}
fclose(fp);
if (utf8 && !bc_utf8_validate_str(str)) {
*err = bc_error_new_printf(BC_ERROR_FILE,
"File content is not valid UTF-8: %s", path);
bc_string_free(str, true);
return NULL;
}
return bc_string_free(str, false);
}
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