Provide a fallback implementation of strndup()
Some environments (e.g. Windows + MSVC) do not provide strndup(), this tries to detect its presence and provide a fallback implementation when not available. [ran: some tweaks]master
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93a13050d6
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@ -99,6 +99,9 @@ endif
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if cc.has_header_symbol('fcntl.h', 'posix_fallocate', prefix: system_ext_define)
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configh_data.set('HAVE_POSIX_FALLOCATE', 1)
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endif
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if cc.has_header_symbol('string.h', 'strndup', prefix: system_ext_define)
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configh_data.set('HAVE_STRNDUP', 1)
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endif
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if cc.has_header_symbol('stdlib.h', 'secure_getenv', prefix: system_ext_define)
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configh_data.set('HAVE_SECURE_GETENV', 1)
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elif cc.has_header_symbol('stdlib.h', '__secure_getenv', prefix: system_ext_define)
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15
src/utils.h
15
src/utils.h
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@ -110,6 +110,21 @@ memdup(const void *mem, size_t nmemb, size_t size)
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return p;
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}
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#if !(defined(HAVE_STRNDUP) && HAVE_STRNDUP)
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static inline char *
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strndup(const char *s, size_t n)
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{
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size_t slen = strlen(s);
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size_t len = MIN(slen, n);
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char *p = malloc(len + 1);
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if (!p)
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return NULL;
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memcpy(p, str, len);
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p[len] = '\0';
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return p;
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}
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#endif
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/* ctype.h is locale-dependent and has other oddities. */
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static inline bool
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is_space(char ch)
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