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authorトトも <85485984+ElectronicsArchiver@users.noreply.github.com>2022-04-16 20:18:56 +0200
committerGitHub <noreply@github.com>2022-04-16 14:18:56 -0400
commit33cc3b9dd7bf3dae1c6cf86e46bb4923f96e7fff (patch)
tree02fb808d19aee560ac9d381ca5a52509881cdd44 /dstring.c
parent8f5a73a6585bd425807430fd80ce1e3a737f4c5f (diff)
downloadbfs-33cc3b9dd7bf3dae1c6cf86e46bb4923f96e7fff.tar.xz
Source / Include Folder (#88)
Moved Source Files Into `src` Folder
Diffstat (limited to 'dstring.c')
-rw-r--r--dstring.c220
1 files changed, 0 insertions, 220 deletions
diff --git a/dstring.c b/dstring.c
deleted file mode 100644
index f344d09..0000000
--- a/dstring.c
+++ /dev/null
@@ -1,220 +0,0 @@
-/****************************************************************************
- * bfs *
- * Copyright (C) 2016-2022 Tavian Barnes <tavianator@tavianator.com> *
- * *
- * Permission to use, copy, modify, and/or distribute this software for any *
- * purpose with or without fee is hereby granted. *
- * *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF *
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR *
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES *
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN *
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF *
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *
- ****************************************************************************/
-
-#include "dstring.h"
-#include <assert.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-/**
- * The memory representation of a dynamic string. Users get a pointer to data.
- */
-struct dstring {
- size_t capacity;
- size_t length;
- char data[];
-};
-
-/** Get the string header from the string data pointer. */
-static struct dstring *dstrheader(const char *dstr) {
- return (struct dstring *)(dstr - offsetof(struct dstring, data));
-}
-
-/** Get the correct size for a dstring with the given capacity. */
-static size_t dstrsize(size_t capacity) {
- return BFS_FLEX_SIZEOF(struct dstring, data, capacity + 1);
-}
-
-/** Allocate a dstring with the given contents. */
-static char *dstralloc_impl(size_t capacity, size_t length, const char *data) {
- // Avoid reallocations for small strings
- if (capacity < 7) {
- capacity = 7;
- }
-
- struct dstring *header = malloc(dstrsize(capacity));
- if (!header) {
- return NULL;
- }
-
- header->capacity = capacity;
- header->length = length;
-
- memcpy(header->data, data, length);
- header->data[length] = '\0';
- return header->data;
-}
-
-char *dstralloc(size_t capacity) {
- return dstralloc_impl(capacity, 0, "");
-}
-
-char *dstrdup(const char *str) {
- size_t len = strlen(str);
- return dstralloc_impl(len, len, str);
-}
-
-char *dstrndup(const char *str, size_t n) {
- size_t len = strnlen(str, n);
- return dstralloc_impl(len, len, str);
-}
-
-size_t dstrlen(const char *dstr) {
- return dstrheader(dstr)->length;
-}
-
-int dstreserve(char **dstr, size_t capacity) {
- struct dstring *header = dstrheader(*dstr);
-
- if (capacity > header->capacity) {
- capacity *= 2;
-
- header = realloc(header, dstrsize(capacity));
- if (!header) {
- return -1;
- }
- header->capacity = capacity;
-
- *dstr = header->data;
- }
-
- return 0;
-}
-
-int dstresize(char **dstr, size_t length) {
- if (dstreserve(dstr, length) != 0) {
- return -1;
- }
-
- struct dstring *header = dstrheader(*dstr);
- header->length = length;
- header->data[length] = '\0';
-
- return 0;
-}
-
-/** Common implementation of dstr{cat,ncat,app}. */
-static int dstrcat_impl(char **dest, const char *src, size_t srclen) {
- size_t oldlen = dstrlen(*dest);
- size_t newlen = oldlen + srclen;
-
- if (dstresize(dest, newlen) != 0) {
- return -1;
- }
-
- memcpy(*dest + oldlen, src, srclen);
- return 0;
-}
-
-int dstrcat(char **dest, const char *src) {
- return dstrcat_impl(dest, src, strlen(src));
-}
-
-int dstrncat(char **dest, const char *src, size_t n) {
- return dstrcat_impl(dest, src, strnlen(src, n));
-}
-
-int dstrdcat(char **dest, const char *src) {
- return dstrcat_impl(dest, src, dstrlen(src));
-}
-
-int dstrapp(char **str, char c) {
- return dstrcat_impl(str, &c, 1);
-}
-
-char *dstrprintf(const char *format, ...) {
- va_list args;
-
- va_start(args, format);
- char *str = dstrvprintf(format, args);
- va_end(args);
-
- return str;
-}
-
-char *dstrvprintf(const char *format, va_list args) {
- // Guess a capacity to try to avoid reallocating
- char *str = dstralloc(2*strlen(format));
- if (!str) {
- return NULL;
- }
-
- if (dstrvcatf(&str, format, args) != 0) {
- dstrfree(str);
- return NULL;
- }
-
- return str;
-}
-
-int dstrcatf(char **str, const char *format, ...) {
- va_list args;
-
- va_start(args, format);
- int ret = dstrvcatf(str, format, args);
- va_end(args);
-
- return ret;
-}
-
-int dstrvcatf(char **str, const char *format, va_list args) {
- // Guess a capacity to try to avoid calling vsnprintf() twice
- size_t len = dstrlen(*str);
- dstreserve(str, len + 2*strlen(format));
- size_t cap = dstrheader(*str)->capacity;
-
- va_list copy;
- va_copy(copy, args);
-
- char *tail = *str + len;
- int ret = vsnprintf(tail, cap - len + 1, format, args);
- if (ret < 0) {
- goto fail;
- }
-
- size_t tail_len = ret;
- if (tail_len > cap - len) {
- cap = len + tail_len;
- if (dstreserve(str, cap) != 0) {
- goto fail;
- }
-
- tail = *str + len;
- ret = vsnprintf(tail, tail_len + 1, format, copy);
- if (ret < 0 || (size_t)ret != tail_len) {
- assert(!"Length of formatted string changed");
- goto fail;
- }
- }
-
- va_end(copy);
-
- struct dstring *header = dstrheader(*str);
- header->length += tail_len;
- return 0;
-
-fail:
- *tail = '\0';
- return -1;
-}
-
-void dstrfree(char *dstr) {
- if (dstr) {
- free(dstrheader(dstr));
- }
-}