From 0805c62aeeab7efb54ad43c31591c4a3c3fb2008 Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Tue, 14 Jan 2020 23:57:35 +0100 Subject: split off buffer logic --- src/util/util.c | 207 +------------------------------------------------------- 1 file changed, 1 insertion(+), 206 deletions(-) (limited to 'src/util/util.c') diff --git a/src/util/util.c b/src/util/util.c index 5a06a1229..42c3b7e73 100644 --- a/src/util/util.c +++ b/src/util/util.c @@ -1,6 +1,6 @@ /* This file is part of TALER - Copyright (C) 2014 GNUnet e.V. + Copyright (C) 2014-2020 Taler Systems SA TALER is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -13,7 +13,6 @@ You should have received a copy of the GNU General Public License along with TALER; see the file COPYING. If not, see */ - /** * @file util.c * @brief Common utility functions; we might choose to move those to GNUnet at some point @@ -540,210 +539,6 @@ TALER_url_absolute_mhd (struct MHD_Connection *connection, } -/** - * Initialize a buffer with the given capacity. - * - * When a buffer is allocated with this function, a warning is logged - * when the buffer exceeds the initial capacity. - * - * @param buf the buffer to initialize - * @param capacity the capacity (in bytes) to allocate for @a buf - */ -void -TALER_buffer_prealloc (struct TALER_Buffer *buf, size_t capacity) -{ - /* Buffer should be zero-initialized */ - GNUNET_assert (0 == buf->mem); - GNUNET_assert (0 == buf->capacity); - GNUNET_assert (0 == buf->position); - buf->mem = GNUNET_malloc (capacity); - buf->capacity = capacity; - buf->warn_grow = GNUNET_YES; -} - - -/** - * Make sure that at least @a n bytes remaining in the buffer. - * - * @param buf buffer to potentially grow - * @param n number of bytes that should be available to write - */ -void -TALER_buffer_ensure_remaining (struct TALER_Buffer *buf, size_t n) -{ - size_t new_capacity = buf->position + n; - - if (new_capacity <= buf->capacity) - return; - /* warn if calculation of expected size was wrong */ - GNUNET_break (GNUNET_YES != buf->warn_grow); - if (new_capacity < buf->capacity * 2) - new_capacity = buf->capacity * 2; - buf->capacity = new_capacity; - if (NULL != buf->mem) - buf->mem = GNUNET_realloc (buf->mem, new_capacity); - else - buf->mem = GNUNET_malloc (new_capacity); -} - - -/** - * Write bytes to the buffer. - * - * Grows the buffer if necessary. - * - * @param buf buffer to write to - * @param data data to read from - * @param len number of bytes to copy from @a data to @a buf - * - */ -void -TALER_buffer_write (struct TALER_Buffer *buf, const char *data, size_t len) -{ - TALER_buffer_ensure_remaining (buf, len); - memcpy (buf->mem + buf->position, data, len); - buf->position += len; -} - - -/** - * Write a 0-terminated string to a buffer, excluding the 0-terminator. - * - * @param buf the buffer to write to - * @param str the string to write to @a buf - */ -void -TALER_buffer_write_str (struct TALER_Buffer *buf, const char *str) -{ - size_t len = strlen (str); - - TALER_buffer_write (buf, str, len); -} - - -/** - * Clear the buffer and return the string it contained. - * The caller is responsible to eventually #GNUNET_free - * the returned string. - * - * The returned string is always 0-terminated. - * - * @param buf the buffer to reap the string from - * @returns the buffer contained in the string - */ -char * -TALER_buffer_reap_str (struct TALER_Buffer *buf) -{ - char *res; - - /* ensure 0-termination */ - if ( (0 == buf->position) || ('\0' != buf->mem[buf->position - 1])) - { - TALER_buffer_ensure_remaining (buf, 1); - buf->mem[buf->position++] = '\0'; - } - res = buf->mem; - *buf = (struct TALER_Buffer) { 0 }; - return res; -} - - -/** - * Free the backing memory of the given buffer. - * Does not free the memory of the buffer control structure, - * which is typically stack-allocated. - */ -void -TALER_buffer_clear (struct TALER_Buffer *buf) -{ - GNUNET_free_non_null (buf->mem); - *buf = (struct TALER_Buffer) { 0 }; -} - - -/** - * Write a path component to a buffer, ensuring that - * there is exactly one slash between the previous contents - * of the buffer and the new string. - * - * @param buf buffer to write to - * @param str string containing the new path component - */ -void -TALER_buffer_write_path (struct TALER_Buffer *buf, const char *str) -{ - size_t len = strlen (str); - - while ( (0 != len) && ('/' == str[0]) ) - { - str++; - len--; - } - if ( (0 == buf->position) || ('/' != buf->mem[buf->position - 1]) ) - { - TALER_buffer_ensure_remaining (buf, 1); - buf->mem[buf->position++] = '/'; - } - TALER_buffer_write (buf, str, len); -} - - -/** - * Write a 0-terminated formatted string to a buffer, excluding the - * 0-terminator. - * - * Grows the buffer if necessary. - * - * @param buf the buffer to write to - * @param fmt format string - * @param ... format arguments - */ -void -TALER_buffer_write_fstr (struct TALER_Buffer *buf, const char *fmt, ...) -{ - va_list args; - - va_start (args, fmt); - TALER_buffer_write_vfstr (buf, fmt, args); - va_end (args); -} - - -/** - * Write a 0-terminated formatted string to a buffer, excluding the - * 0-terminator. - * - * Grows the buffer if necessary. - * - * @param buf the buffer to write to - * @param fmt format string - * @param args format argument list - */ -void -TALER_buffer_write_vfstr (struct TALER_Buffer *buf, - const char *fmt, - va_list args) -{ - int res; - va_list args2; - - va_copy (args2, args); - res = vsnprintf (NULL, 0, fmt, args2); - va_end (args2); - - GNUNET_assert (res >= 0); - TALER_buffer_ensure_remaining (buf, res + 1); - - va_copy (args2, args); - res = vsnprintf (buf->mem + buf->position, res + 1, fmt, args2); - va_end (args2); - - GNUNET_assert (res >= 0); - buf->position += res; - GNUNET_assert (buf->position <= buf->capacity); -} - - /** * Prefix of PAYTO URLs. */ -- cgit v1.2.3