97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
/* winf.h
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#pragma once
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/* Hack for Cygwin processes. If the Windows command line length gets slightly
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bigger than this value, the stack position is suddenly moved up by 64K for
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no apparent reason, which results in subsequent forks failing. Since Cygwin
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processes get the full command line as argv array anyway, this only affects
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the maximum command line length of Cygwin applications which nonsensically
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have a WinMain instead of a main entry point or which use GetCommandLine. */
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#define MAXCYGWINCMDLEN 30000
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#define MAXWINCMDLEN 32767
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#define LINE_BUF_CHUNK (MAX_PATH * 2)
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class av
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{
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char **argv;
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int calloced;
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public:
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int argc;
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bool win16_exe;
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av (): argv (NULL) {}
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av (int ac_in, const char * const *av_in) : calloced (0), argc (ac_in), win16_exe (false)
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{
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argv = (char **) cmalloc_abort (HEAP_1_ARGV, (argc + 5) * sizeof (char *));
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memcpy (argv, av_in, (argc + 1) * sizeof (char *));
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}
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void *operator new (size_t, void *p) __attribute__ ((nothrow)) {return p;}
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~av ()
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{
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if (argv)
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{
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for (int i = 0; i < calloced; i++)
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cfree (argv[i]);
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cfree (argv);
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}
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}
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int unshift (const char *what) __reg2;
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operator char **() {return argv;}
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void all_calloced () {calloced = argc;}
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void replace0_maybe (const char *arg0)
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{
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/* Note: Assumes that argv array has not yet been "unshifted" */
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if (!calloced)
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{
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argv[0] = cstrdup1 (arg0);
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calloced = 1;
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}
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}
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void dup_all ()
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{
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for (int i = calloced; i < argc; i++)
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argv[i] = cstrdup1 (argv[i]);
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calloced = argc;
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}
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int setup (const char *, path_conv&, const char *, int, const char *const *,
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bool) __reg3;
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};
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class linebuf
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{
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size_t ix;
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char *buf;
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size_t alloced;
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public:
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linebuf () : ix (0), buf (NULL), alloced (0) {}
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~linebuf () {if (buf) free (buf);}
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void __reg3 add (const char *, int);
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void add (const char *what) {add (what, strlen (what));}
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void prepend (const char *, int);
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void __reg2 finish (bool);
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bool __reg3 fromargv(av&, const char *, bool);;
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operator size_t () const { return ix + 1; }
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operator const char * () const { return buf; }
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operator wchar_t * ()
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{
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size_t n = ix + 1;
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/* Note that this malloc'ed buffer is not freed by the destructor.
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It is up to the caller to do (or not do) that. */
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wchar_t *wbuf = (wchar_t *) malloc (sizeof (wchar_t) * n);
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return wcs (wbuf, n);
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}
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wchar_t *wcs (wchar_t *wbuf) { return wcs (wbuf, ix + 1); }
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wchar_t *wcs (wchar_t *wbuf, size_t n)
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{
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if (n == 1)
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wbuf[0] = L'\0';
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else
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sys_mbstowcs (wbuf, n, buf);
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return wbuf;
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}
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};
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