diff options
Diffstat (limited to 'examples/redis-unstable/deps/lua/src/strbuf.c')
| -rw-r--r-- | examples/redis-unstable/deps/lua/src/strbuf.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/examples/redis-unstable/deps/lua/src/strbuf.c b/examples/redis-unstable/deps/lua/src/strbuf.c deleted file mode 100644 index 97ee940..0000000 --- a/examples/redis-unstable/deps/lua/src/strbuf.c +++ /dev/null @@ -1,197 +0,0 @@ -/* strbuf - String buffer routines - * - * Copyright (c) 2010-2012 Mark Pulford <mark@kyne.com.au> - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sublicense, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. - * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY - * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, - * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE - * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <stdarg.h> -#include <string.h> -#include <stdint.h> - -#include "strbuf.h" - -static void die(const char *fmt, ...) -{ - va_list arg; - - va_start(arg, fmt); - vfprintf(stderr, fmt, arg); - va_end(arg); - fprintf(stderr, "\n"); - - abort(); -} - -void strbuf_init(strbuf_t *s, size_t len) -{ - size_t size; - - if (!len) - size = STRBUF_DEFAULT_SIZE; - else - size = len + 1; - if (size < len) - die("Overflow, len: %zu", len); - s->buf = NULL; - s->size = size; - s->length = 0; - s->dynamic = 0; - s->reallocs = 0; - s->debug = 0; - - s->buf = malloc(size); - if (!s->buf) - die("Out of memory"); - - strbuf_ensure_null(s); -} - -strbuf_t *strbuf_new(size_t len) -{ - strbuf_t *s; - - s = malloc(sizeof(strbuf_t)); - if (!s) - die("Out of memory"); - - strbuf_init(s, len); - - /* Dynamic strbuf allocation / deallocation */ - s->dynamic = 1; - - return s; -} - -static inline void debug_stats(strbuf_t *s) -{ - if (s->debug) { - fprintf(stderr, "strbuf(%lx) reallocs: %d, length: %zd, size: %zd\n", - (long)s, s->reallocs, s->length, s->size); - } -} - -/* If strbuf_t has not been dynamically allocated, strbuf_free() can - * be called any number of times strbuf_init() */ -void strbuf_free(strbuf_t *s) -{ - debug_stats(s); - - if (s->buf) { - free(s->buf); - s->buf = NULL; - } - if (s->dynamic) - free(s); -} - -char *strbuf_free_to_string(strbuf_t *s, size_t *len) -{ - char *buf; - - debug_stats(s); - - strbuf_ensure_null(s); - - buf = s->buf; - if (len) - *len = s->length; - - if (s->dynamic) - free(s); - - return buf; -} - -static size_t calculate_new_size(strbuf_t *s, size_t len) -{ - size_t reqsize, newsize; - - if (len <= 0) - die("BUG: Invalid strbuf length requested"); - - /* Ensure there is room for optional NULL termination */ - reqsize = len + 1; - if (reqsize < len) - die("Overflow, len: %zu", len); - - /* If the user has requested to shrink the buffer, do it exactly */ - if (s->size > reqsize) - return reqsize; - - newsize = s->size; - if (reqsize >= SIZE_MAX / 2) { - newsize = reqsize; - } else { - /* Exponential sizing */ - while (newsize < reqsize) - newsize *= 2; - } - - if (newsize < reqsize) - die("BUG: strbuf length would overflow, len: %zu", len); - - return newsize; -} - - -/* Ensure strbuf can handle a string length bytes long (ignoring NULL - * optional termination). */ -void strbuf_resize(strbuf_t *s, size_t len) -{ - size_t newsize; - - newsize = calculate_new_size(s, len); - - if (s->debug > 1) { - fprintf(stderr, "strbuf(%lx) resize: %zd => %zd\n", - (long)s, s->size, newsize); - } - - s->size = newsize; - s->buf = realloc(s->buf, s->size); - if (!s->buf) - die("Out of memory, len: %zu", len); - s->reallocs++; -} - -void strbuf_append_string(strbuf_t *s, const char *str) -{ - size_t i, space; - - space = strbuf_empty_length(s); - - for (i = 0; str[i]; i++) { - if (space < 1) { - strbuf_resize(s, s->length + 1); - space = strbuf_empty_length(s); - } - - s->buf[s->length] = str[i]; - s->length++; - space--; - } -} - - -/* vi:ai et sw=4 ts=4: - */ |