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-rw-r--r--gl/xalloc.h59
1 files changed, 30 insertions, 29 deletions
diff --git a/gl/xalloc.h b/gl/xalloc.h
index 57a13e0a..6122cc58 100644
--- a/gl/xalloc.h
+++ b/gl/xalloc.h
@@ -1,7 +1,8 @@
1/* xalloc.h -- malloc with out-of-memory checking 1/* xalloc.h -- malloc with out-of-memory checking
2 2
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 1999, 2000, 2003, 2004, 2006, 2007, 2008 Free Software Foundation, Inc. 4 2000, 2003, 2004, 2006, 2007, 2008, 2009, 2010 Free Software Foundation,
5 Inc.
5 6
6 This program is free software: you can redistribute it and/or modify 7 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by 8 it under the terms of the GNU General Public License as published by
@@ -105,10 +106,10 @@ char *xstrdup (char const *str) ATTRIBUTE_MALLOC;
105# if HAVE_INLINE 106# if HAVE_INLINE
106# define static_inline static inline 107# define static_inline static inline
107# else 108# else
108 void *xnmalloc (size_t n, size_t s) ATTRIBUTE_MALLOC; 109void *xnmalloc (size_t n, size_t s) ATTRIBUTE_MALLOC;
109 void *xnrealloc (void *p, size_t n, size_t s); 110void *xnrealloc (void *p, size_t n, size_t s);
110 void *x2nrealloc (void *p, size_t *pn, size_t s); 111void *x2nrealloc (void *p, size_t *pn, size_t s);
111 char *xcharalloc (size_t n) ATTRIBUTE_MALLOC; 112char *xcharalloc (size_t n) ATTRIBUTE_MALLOC;
112# endif 113# endif
113 114
114# ifdef static_inline 115# ifdef static_inline
@@ -161,9 +162,9 @@ xnrealloc (void *p, size_t n, size_t s)
161 void 162 void
162 append_int (int value) 163 append_int (int value)
163 { 164 {
164 if (used == allocated) 165 if (used == allocated)
165 p = x2nrealloc (p, &allocated, sizeof *p); 166 p = x2nrealloc (p, &allocated, sizeof *p);
166 p[used++] = value; 167 p[used++] = value;
167 } 168 }
168 169
169 This causes x2nrealloc to allocate a block of some nonzero size the 170 This causes x2nrealloc to allocate a block of some nonzero size the
@@ -181,12 +182,12 @@ xnrealloc (void *p, size_t n, size_t s)
181 void 182 void
182 append_int (int value) 183 append_int (int value)
183 { 184 {
184 if (used == allocated) 185 if (used == allocated)
185 { 186 {
186 p = x2nrealloc (p, &allocated1, sizeof *p); 187 p = x2nrealloc (p, &allocated1, sizeof *p);
187 allocated = allocated1; 188 allocated = allocated1;
188 } 189 }
189 p[used++] = value; 190 p[used++] = value;
190 } 191 }
191 192
192 */ 193 */
@@ -199,25 +200,25 @@ x2nrealloc (void *p, size_t *pn, size_t s)
199 if (! p) 200 if (! p)
200 { 201 {
201 if (! n) 202 if (! n)
202 { 203 {
203 /* The approximate size to use for initial small allocation 204 /* The approximate size to use for initial small allocation
204 requests, when the invoking code specifies an old size of 205 requests, when the invoking code specifies an old size of
205 zero. 64 bytes is the largest "small" request for the 206 zero. 64 bytes is the largest "small" request for the
206 GNU C library malloc. */ 207 GNU C library malloc. */
207 enum { DEFAULT_MXFAST = 64 }; 208 enum { DEFAULT_MXFAST = 64 };
208 209
209 n = DEFAULT_MXFAST / s; 210 n = DEFAULT_MXFAST / s;
210 n += !n; 211 n += !n;
211 } 212 }
212 } 213 }
213 else 214 else
214 { 215 {
215 /* Set N = ceil (1.5 * N) so that progress is made if N == 1. 216 /* Set N = ceil (1.5 * N) so that progress is made if N == 1.
216 Check for overflow, so that N * S stays in size_t range. 217 Check for overflow, so that N * S stays in size_t range.
217 The check is slightly conservative, but an exact check isn't 218 The check is slightly conservative, but an exact check isn't
218 worth the trouble. */ 219 worth the trouble. */
219 if ((size_t) -1 / 3 * 2 / s <= n) 220 if ((size_t) -1 / 3 * 2 / s <= n)
220 xalloc_die (); 221 xalloc_die ();
221 n += (n + 1) / 2; 222 n += (n + 1) / 2;
222 } 223 }
223 224