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71 lines
2.5 KiB
71 lines
2.5 KiB
/* |
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* LibXDiff by Davide Libenzi ( File Differential Library ) |
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* Copyright (C) 2003 Davide Libenzi |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, see |
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* <http://www.gnu.org/licenses/>. |
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* |
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* Davide Libenzi <davidel@xmailserver.org> |
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* |
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*/ |
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#if !defined(XMACROS_H) |
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#define XMACROS_H |
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#define XDL_MIN(a, b) ((a) < (b) ? (a): (b)) |
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#define XDL_MAX(a, b) ((a) > (b) ? (a): (b)) |
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#define XDL_ABS(v) ((v) >= 0 ? (v): -(v)) |
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#define XDL_ISDIGIT(c) ((c) >= '0' && (c) <= '9') |
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#define XDL_ISSPACE(c) (isspace((unsigned char)(c))) |
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#define XDL_ADDBITS(v,b) ((v) + ((v) >> (b))) |
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#define XDL_MASKBITS(b) ((1UL << (b)) - 1) |
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#define XDL_HASHLONG(v,b) (XDL_ADDBITS((unsigned long)(v), b) & XDL_MASKBITS(b)) |
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#define XDL_LE32_PUT(p, v) \ |
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do { \ |
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unsigned char *__p = (unsigned char *) (p); \ |
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*__p++ = (unsigned char) (v); \ |
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*__p++ = (unsigned char) ((v) >> 8); \ |
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*__p++ = (unsigned char) ((v) >> 16); \ |
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*__p = (unsigned char) ((v) >> 24); \ |
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} while (0) |
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#define XDL_LE32_GET(p, v) \ |
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do { \ |
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unsigned char const *__p = (unsigned char const *) (p); \ |
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(v) = (unsigned long) __p[0] | ((unsigned long) __p[1]) << 8 | \ |
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((unsigned long) __p[2]) << 16 | ((unsigned long) __p[3]) << 24; \ |
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} while (0) |
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/* Allocate an array of nr elements, returns NULL on failure */ |
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#define XDL_ALLOC_ARRAY(p, nr) \ |
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((p) = SIZE_MAX / sizeof(*(p)) >= (size_t)(nr) \ |
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? xdl_malloc((nr) * sizeof(*(p))) \ |
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: NULL) |
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/* Allocate an array of nr zeroed out elements, returns NULL on failure */ |
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#define XDL_CALLOC_ARRAY(p, nr) ((p) = xdl_calloc(nr, sizeof(*(p)))) |
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/* |
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* Ensure array p can accommodate at least nr elements, growing the |
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* array and updating alloc (which is the number of allocated |
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* elements) as necessary. Frees p and returns -1 on failure, returns |
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* 0 on success |
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*/ |
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#define XDL_ALLOC_GROW(p, nr, alloc) \ |
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(-!((nr) <= (alloc) || \ |
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((p) = xdl_alloc_grow_helper((p), (nr), &(alloc), sizeof(*(p)))))) |
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#endif /* #if !defined(XMACROS_H) */
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