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134 lines
3.9 KiB
134 lines
3.9 KiB
/******************************************************************************
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* Copyright (C) 2020-2021 Dibyendu Majumdar
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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******************************************************************************/
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#include "membuf.h"
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#include <assert.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <allocate.h>
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void raviX_string_copy(char *buf, const char *src, size_t buflen)
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{
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if (buflen == 0)
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return;
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strncpy(buf, src, buflen);
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buf[buflen - 1] = 0;
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}
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void raviX_buffer_init(TextBuffer *mb, size_t initial_size)
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{
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if (initial_size > 0) {
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mb->buf = (char *)raviX_calloc(1, initial_size);
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} else
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mb->buf = NULL;
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mb->pos = 0;
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mb->capacity = initial_size;
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}
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void raviX_buffer_resize(TextBuffer *mb, size_t new_size)
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{
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if (new_size <= mb->capacity)
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return;
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char *newmem = (char *)realloc(mb->buf, new_size);
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if (newmem == NULL) {
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fprintf(stderr, "Out of memory\n");
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exit(1);
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}
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mb->buf = newmem;
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mb->capacity = new_size;
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}
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void raviX_buffer_reserve(TextBuffer *mb, size_t n)
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{
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if (mb->capacity < mb->pos + n) {
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size_t new_size = (((mb->pos + n) * 3 + 30) / 2) & ~15;
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raviX_buffer_resize(mb, new_size);
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assert(mb->capacity > mb->pos + n);
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}
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}
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void raviX_buffer_free(TextBuffer *mb) { raviX_free(mb->buf); }
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void raviX_buffer_add_bytes(TextBuffer *mb, const char *str, size_t len)
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{
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size_t required_size = mb->pos + len + 1; /* extra byte for NULL terminator */
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raviX_buffer_resize(mb, required_size);
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assert(mb->capacity - mb->pos > len);
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raviX_string_copy(&mb->buf[mb->pos], str, mb->capacity - mb->pos);
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mb->pos += len;
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}
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void raviX_buffer_add_string(TextBuffer *mb, const char *str)
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{
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size_t len = strlen(str);
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raviX_buffer_add_bytes(mb, str, len);
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}
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void raviX_buffer_add_fstring(TextBuffer *mb, const char *fmt, ...)
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{
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va_list args;
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int estimated_size = 128;
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for (int i = 0; i < 2; i++) {
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raviX_buffer_reserve(mb, estimated_size); // ensure we have at least estimated_size free space
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va_start(args, fmt);
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int n = vsnprintf(mb->buf + mb->pos, estimated_size, fmt, args);
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va_end(args);
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if (n > estimated_size) {
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estimated_size = n + 1; // allow for 0 byte
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} else if (n < 0) {
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fprintf(stderr, "Buffer conversion error\n");
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assert(false);
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break;
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} else {
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mb->pos += n;
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break;
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}
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}
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}
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void raviX_buffer_add_bool(TextBuffer *mb, bool value)
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{
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if (value)
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raviX_buffer_add_string(mb, "true");
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else
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raviX_buffer_add_string(mb, "false");
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}
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void raviX_buffer_add_int(TextBuffer *mb, int value)
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{
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char temp[100];
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snprintf(temp, sizeof temp, "%d", value);
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raviX_buffer_add_string(mb, temp);
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}
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void raviX_buffer_add_longlong(TextBuffer *mb, int64_t value)
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{
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char temp[100];
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snprintf(temp, sizeof temp, "%" PRId64 "", value);
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raviX_buffer_add_string(mb, temp);
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}
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void raviX_buffer_add_char(TextBuffer *mb, char c)
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{
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char temp[2] = {c, '\0'};
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raviX_buffer_add_string(mb, temp);
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}
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