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/*
Copyright (C) 2016-2017 Brazil
Copyright (C) 2019-2022 Sutou Kouhei <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "grn_str.h"
void
grn_raw_string_lstrip(grn_ctx *ctx,
grn_raw_string *string)
{
const char *end;
int space_len;
end = string->value + string->length;
while (string->value < end) {
space_len = grn_isspace(string->value, ctx->encoding);
if (space_len == 0) {
break;
}
string->value += space_len;
string->length -= (size_t)space_len;
}
}
bool
grn_raw_string_have_sub_string(grn_ctx *ctx,
grn_raw_string *string,
grn_raw_string *sub_string)
{
if (sub_string->length == 0) {
return false;
}
if (sub_string->length > string->length) {
return false;
}
const char *string_current = string->value;
const char *string_end = string->value + string->length;
const char *sub_string_current = sub_string->value;
const char *sub_string_end = sub_string->value + sub_string->length;
int sub_string_start_char_len;
int sub_string_char_len;
sub_string_start_char_len =
grn_charlen(ctx, sub_string_current, sub_string_end);
if (sub_string_start_char_len == 0) {
return false;
}
sub_string_char_len = sub_string_start_char_len;
while (string_current < string_end) {
int string_char_len;
string_char_len = grn_charlen(ctx, string_current, string_end);
if (string_char_len == 0) {
return false;
}
if (string_char_len == sub_string_char_len &&
memcmp(string_current,
sub_string_current,
(size_t)string_char_len) == 0) {
sub_string_current += sub_string_char_len;
if (sub_string_current == sub_string_end) {
return true;
}
sub_string_char_len = grn_charlen(ctx, sub_string_current, sub_string_end);
if (sub_string_char_len == 0) {
return false;
}
} else {
if (sub_string_current != sub_string->value) {
sub_string_current = sub_string->value;
sub_string_char_len = sub_string_start_char_len;
continue;
}
}
string_current += string_char_len;
}
return false;
}
bool
grn_raw_string_have_sub_string_cstring(grn_ctx *ctx,
grn_raw_string *string,
const char *sub_cstring)
{
grn_raw_string sub_string;
if (sub_cstring) {
sub_string.value = sub_cstring;
sub_string.length = strlen(sub_cstring);
} else {
sub_string.value = NULL;
sub_string.length = 0;
}
return grn_raw_string_have_sub_string(ctx, string, &sub_string);
}
grn_raw_string
grn_raw_string_substring(grn_ctx *ctx,
const grn_raw_string *string,
size_t start,
int64_t length)
{
grn_raw_string substring;
substring.value = string->value + start;
if (length < 0) {
int64_t substring_length = (int64_t)(string->length - start) + length + 1;
if (substring_length < 0) {
substring.length = 0;
} else {
substring.length = (size_t)substring_length;
}
} else {
substring.length = (size_t)length;
}
return substring;
}
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