mirror of
https://github.com/nunuhara/xsystem4.git
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60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/* Copyright (C) 2019 Nunuhara Cabbage <nunuhara@haniwa.technology>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://gnu.org/licenses/>.
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*/
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#ifndef SYSTEM4_STRING_H
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#define SYSTEM4_STRING_H
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#include <stdbool.h>
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#include <stdlib.h>
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union vm_value;
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struct string {
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int size;
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unsigned int ref : 24;
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unsigned int cow : 1;
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char text[];
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};
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extern struct string EMPTY_STRING;
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void free_string(struct string *str);
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// constructors
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struct string *make_string(const char *str, unsigned int len);
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struct string *string_ref(struct string *s);
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struct string *string_dup(const struct string *in);
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struct string *integer_to_string(int n);
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struct string *float_to_string(float f, int precision);
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struct string *string_concatenate(const struct string *a, const struct string *b);
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struct string *string_copy(const struct string *s, int index, int len);
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struct string *string_format(struct string *fmt, union vm_value arg);
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// mutators
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void string_append(struct string **a, const struct string *b);
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void string_push_back(struct string **s, int c);
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void string_pop_back(struct string **s);
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void string_erase(struct string **s, int index);
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// queries
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int string_find(const struct string *haystack, const struct string *needle);
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// characters
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int string_get_char(const struct string *str, int i);
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void string_set_char(struct string **_s, int i, unsigned int c);
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#endif
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