75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/* String descriptors, with out-of-memory checking.
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Copyright (C) 2023-2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation, either version 3 of the License,
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or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#define GL_XSTRING_DESC_INLINE _GL_EXTERN_INLINE
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#include "xstring-desc.h"
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#include "ialloc.h"
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string_desc_t
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xstring_desc_concat (idx_t n, string_desc_t string1, ...)
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{
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if (n <= 0)
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/* Invalid argument. */
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abort ();
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idx_t total = 0;
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total += string1._nbytes;
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if (n > 1)
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{
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va_list other_strings;
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idx_t i;
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va_start (other_strings, string1);
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for (i = n - 1; i > 0; i--)
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{
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string_desc_t arg = va_arg (other_strings, string_desc_t);
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total += arg._nbytes;
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}
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va_end (other_strings);
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}
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char *combined = (char *) imalloc (total);
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if (combined == NULL)
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xalloc_die ();
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idx_t pos = 0;
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memcpy (combined, string1._data, string1._nbytes);
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pos += string1._nbytes;
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if (n > 1)
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{
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va_list other_strings;
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idx_t i;
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va_start (other_strings, string1);
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for (i = n - 1; i > 0; i--)
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{
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string_desc_t arg = va_arg (other_strings, string_desc_t);
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if (arg._nbytes > 0)
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memcpy (combined + pos, arg._data, arg._nbytes);
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pos += arg._nbytes;
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}
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va_end (other_strings);
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}
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string_desc_t result;
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result._nbytes = total;
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result._data = combined;
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return result;
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}
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