+++ /dev/null
-/* -*-c-*-
- *
- * Handle dynamically growing strings
- *
- * (c) 1998 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of the mLib utilities library.
- *
- * mLib is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * mLib 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with mLib; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "alloc.h"
-#include "dstr.h"
-
-/*----- Tunable constants -------------------------------------------------*/
-
-/*
- * If the buffer is empty, it is set to @DSTR_INITSZ@ bytes in size.
- * Otherwise, it's set to the next power of two that's large enough. This is
- * memory-hungry, but efficient.
- */
-
-#define DSTR_INITSZ 64 /* Initial buffer size */
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @dstr_create@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- *
- * Returns: ---
- *
- * Use: Initializes a dynamic string.
- */
-
-void dstr_create(dstr *d) { DCREATE(d); }
-
-/* --- @dstr_destroy@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- *
- * Returns: ---
- *
- * Use: Reclaims the space used by a dynamic string.
- */
-
-void dstr_destroy(dstr *d) { DDESTROY(d); }
-
-/* --- @dstr_reset@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- *
- * Returns: ---
- *
- * Use: Resets a string so that new data gets put at the beginning.
- */
-
-void dstr_reset(dstr *d) { DRESET(d); }
-
-/* --- @dstr_ensure@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- * @size_t sz@ = amount of free space to ensure
- *
- * Returns: ---
- *
- * Use: Ensures that at least @sz@ bytes are available in the
- * given string.
- */
-
-void dstr_ensure(dstr *d, size_t sz)
-{
- size_t rq = d->len + sz;
- size_t nsz;
-
- /* --- If we have enough space, just leave it --- */
-
- if (rq <= d->sz)
- return;
-
- /* --- Grow the buffer --- */
-
- nsz = d->sz;
-
- if (nsz == 0)
- nsz = (DSTR_INITSZ >> 1);
- do nsz <<= 1; while (nsz < rq);
-
- if (d->buf)
- d->buf = x_realloc(d->a, d->buf, nsz, d->sz);
- else
- d->buf = x_alloc(d->a, nsz);
- d->sz = nsz;
-}
-
-/* --- @dstr_putc@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- * @char ch@ = character to append
- *
- * Returns: ---
- *
- * Use: Appends a character to a string.
- */
-
-void dstr_putc(dstr *d, char ch) { DPUTC(d, ch); }
-
-/* --- @dstr_putz@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- *
- * Returns: ---
- *
- * Use: Appends a null byte to a string. The null byte does not
- * contribute to the string's length, and will be overwritten
- * by subsequent `put' operations.
- */
-
-void dstr_putz(dstr *d) { DPUTZ(d); }
-
-/* --- @dstr_puts@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- * @const char *s@ = pointer to string to append
- *
- * Returns: ---
- *
- * Use: Appends a character string to a string. A trailing null
- * byte is added, as for @dstr_putz@.
- */
-
-void dstr_puts(dstr *d, const char *s) { DPUTS(d, s); }
-
-/* --- @dstr_putd@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- * @const dstr *s@ = pointer to a dynamic string to append
- *
- * Returns: ---
- *
- * Use: Appends a dynamic string to a string. A trailing null
- * byte is added, as for @dstr_putz@.
- */
-
-void dstr_putd(dstr *d, const dstr *s) { DPUTD(d, s); }
-
-/* --- @dstr_putm@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- * @const void *p@ = pointer to a block to append
- * @size_t sz@ = size of the block
- *
- * Returns: Appends an arbitrary data block to a string. No trailing
- * null is appended.
- */
-
-void dstr_putm(dstr *d, const void *p, size_t sz) { DPUTM(d, p, sz); }
-
-/* --- @dstr_tidy@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- *
- * Returns: ---
- *
- * Use: Reduces the amount of memory used by a string. A trailing
- * null byte is added, as for @dstr_putz@.
- */
-
-void dstr_tidy(dstr *d)
-{
- d->buf = x_realloc(d->a, d->buf, d->len + 1, d->sz);
- d->buf[d->len] = 0;
- d->sz = d->len + 1;
-}
-
-/* --- @dstr_putline@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- * @FILE *fp@ = a stream to read from
- *
- * Returns: The number of characters read into the buffer, or @EOF@ if
- * end-of-file was reached before any characters were read.
- *
- * Use: Appends the next line from the given input stream to the
- * string. A trailing newline is not added; a trailing null
- * byte is appended, as for @dstr_putz@.
- */
-
-int dstr_putline(dstr *d, FILE *fp)
-{
- size_t left = d->sz - d->len;
- size_t off = d->len;
- int rd = 0;
- int ch;
-
- for (;;) {
-
- /* --- Read the next byte --- */
-
- ch = getc(fp);
-
- /* --- End-of-file when no characters read is special --- */
-
- if (ch == EOF && !rd)
- return (EOF);
-
- /* --- Make sure there's some buffer space --- */
-
- if (!left) {
- d->len = off;
- dstr_ensure(d, 1);
- left = d->sz - off;
- }
-
- /* --- End-of-file or newline ends the loop --- */
-
- if (ch == EOF || ch == '\n') {
- d->buf[off] = 0;
- d->len = off;
- return rd;
- }
-
- /* --- Append the character and continue --- */
-
- d->buf[off++] = ch;
- left--; rd++;
- }
-}
-
-/* --- @dstr_write@ --- *
- *
- * Arguments: @dstr *d@ = pointer to a dynamic string block
- * @FILE *fp@ = a stream to write on
- *
- * Returns: The number of bytes written (as for @fwrite@).
- *
- * Use: Writes a dynamic string to a file.
- */
-
-size_t dstr_write(const dstr *d, FILE *fp) { return (DWRITE(d, fp)); }
-
-/*----- That's all, folks -------------------------------------------------*/
~mdw / mLib / blobdiff