getoptargv.cpp@ 50795

Last change on this file since 50795 was 44529, checked in by vboxsync, 12 years ago
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1	/* $Id: getoptargv.cpp 44529 2013-02-04 15:54:15Z vboxsync $ */
2	/** @file
3	* IPRT - Command Line Parsing, Argument Vector.
4	*/
5
6	/*
7	* Copyright (C) 2010-2012 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27	/*******************************************************************************
28	* Header Files *
29	*******************************************************************************/
30	#include <iprt/getopt.h>
31	#include "internal/iprt.h"
32
33	#include <iprt/asm.h>
34	#include <iprt/assert.h>
35	#include <iprt/err.h>
36	#include <iprt/mem.h>
37	#include <iprt/string.h>
38
39
40	/*******************************************************************************
41	* Header Files *
42	*******************************************************************************/
43	/**
44	* Array indexed by the quoting type and 7-bit ASCII character.
45	*
46	* We include some extra stuff here that the corresponding shell would normally
47	* require quoting of.
48	*/
49	static uint8_t const g_abmQuoteChars[RTGETOPTARGV_CNV_QUOTE_MASK + 1][128/8] =
50	{
51	{ 0xfe, 0xff, 0x0f, 0x00, 0x65, 0x00, 0x00, 0x50 },
52	{ 0xfe, 0xff, 0x0f, 0x00, 0xd7, 0x07, 0x00, 0xd8 },
53	};
54
55
56	#if 0 /* To re-generate the bitmaps. */
57	#include <stdio.h>
58	int main()
59	{
60	RT_ZERO(g_abmQuoteChars);
61
62	# define SET_ALL(ch) \
63	do { \
64	for (size_t iType = 0; iType <= RTGETOPTARGV_CNV_QUOTE_MASK; iType++) \
65	ASMBitSet(&g_abmQuoteChars[iType], (ch)); \
66	} while (0)
67	# define SET(ConstSuffix, ch) \
68	ASMBitSet(&g_abmQuoteChars[RTGETOPTARGV_CNV_QUOTE_##ConstSuffix], (ch));
69
70	/* just flag all the control chars as in need of quoting. */
71	for (char ch = 1; ch < 0x20; ch++)
72	SET_ALL(ch);
73
74	/* ... and space of course */
75	SET_ALL(' ');
76
77	/* MS CRT / CMD.EXE: */
78	SET(MS_CRT, '"')
79	SET(MS_CRT, '&')
80	SET(MS_CRT, '>')
81	SET(MS_CRT, '<')
82	SET(MS_CRT, '\|')
83	SET(MS_CRT, '%')
84
85	/* Bourne shell: */
86	SET(BOURNE_SH, '!');
87	SET(BOURNE_SH, '"');
88	SET(BOURNE_SH, '$');
89	SET(BOURNE_SH, '&');
90	SET(BOURNE_SH, '(');
91	SET(BOURNE_SH, ')');
92	SET(BOURNE_SH, '*');
93	SET(BOURNE_SH, ';');
94	SET(BOURNE_SH, '<');
95	SET(BOURNE_SH, '>');
96	SET(BOURNE_SH, '?');
97	SET(BOURNE_SH, '[');
98	SET(BOURNE_SH, '\'');
99	SET(BOURNE_SH, '\\');
100	SET(BOURNE_SH, '`');
101	SET(BOURNE_SH, '\|');
102	SET(BOURNE_SH, '~');
103
104	for (size_t iType = 0; iType <= RTGETOPTARGV_CNV_QUOTE_MASK; iType++)
105	{
106	printf(" {");
107	for (size_t iByte = 0; iByte < 8; iByte++)
108	printf(iByte == 0 ? " 0x%02x" : ", 0x%02x", g_abmQuoteChars[iType][iByte]);
109	printf(" },\n");
110	}
111	return 0;
112	}
113	#endif /* To re-generate the bitmaps. */
114
115
116	/**
117	* Look for an unicode code point in the separator string.
118	*
119	* @returns true if it's a separator, false if it isn't.
120	* @param Cp The code point.
121	* @param pszSeparators The separators.
122	*/
123	static bool rtGetOptIsUniCpInString(RTUNICP Cp, const char *pszSeparators)
124	{
125	/* This could be done in a more optimal fashion. Probably worth a
126	separate RTStr function at some point. */
127	for (;;)
128	{
129	RTUNICP CpSep;
130	int rc = RTStrGetCpEx(&pszSeparators, &CpSep);
131	AssertRCReturn(rc, false);
132	if (CpSep == Cp)
133	return true;
134	if (!CpSep)
135	return false;
136	}
137	}
138
139
140	/**
141	* Look for an 7-bit ASCII character in the separator string.
142	*
143	* @returns true if it's a separator, false if it isn't.
144	* @param ch The character.
145	* @param pszSeparators The separators.
146	* @param cchSeparators The number of separators chars.
147	*/
148	DECLINLINE(bool) rtGetOptIsAsciiInSet(char ch, const char *pszSeparators, size_t cchSeparators)
149	{
150	switch (cchSeparators)
151	{
152	case 8: if (ch == pszSeparators[7]) return true;
153	case 7: if (ch == pszSeparators[6]) return true;
154	case 6: if (ch == pszSeparators[5]) return true;
155	case 5: if (ch == pszSeparators[4]) return true;
156	case 4: if (ch == pszSeparators[3]) return true;
157	case 3: if (ch == pszSeparators[2]) return true;
158	case 2: if (ch == pszSeparators[1]) return true;
159	case 1: if (ch == pszSeparators[0]) return true;
160	return false;
161	default:
162	return memchr(pszSeparators, ch, cchSeparators) != NULL;
163	}
164	}
165
166
167	/**
168	* Checks if the character is in the set of separators
169	*
170	* @returns true if it is, false if it isn't.
171	*
172	* @param Cp The code point.
173	* @param pszSeparators The separators.
174	* @param cchSeparators The length of @a pszSeparators.
175	*/
176	DECL_FORCE_INLINE(bool) rtGetOptIsCpInSet(RTUNICP Cp, const char *pszSeparators, size_t cchSeparators)
177	{
178	if (RT_LIKELY(Cp <= 127))
179	return rtGetOptIsAsciiInSet((char)Cp, pszSeparators, cchSeparators);
180	return rtGetOptIsUniCpInString(Cp, pszSeparators);
181	}
182
183
184	/**
185	* Skips any delimiters at the start of the string that is pointed to.
186	*
187	* @returns VINF_SUCCESS or RTStrGetCpEx status code.
188	* @param ppszSrc Where to get and return the string pointer.
189	* @param pszSeparators The separators.
190	* @param cchSeparators The length of @a pszSeparators.
191	*/
192	static int rtGetOptSkipDelimiters(const char *ppszSrc, const char pszSeparators, size_t cchSeparators)
193	{
194	const char pszSrc = ppszSrc;
195	const char *pszRet;
196	for (;;)
197	{
198	pszRet = pszSrc;
199	RTUNICP Cp;
200	int rc = RTStrGetCpEx(&pszSrc, &Cp);
201	if (RT_FAILURE(rc))
202	{
203	*ppszSrc = pszRet;
204	return rc;
205	}
206	if ( !Cp
207	\|\| !rtGetOptIsCpInSet(Cp, pszSeparators, cchSeparators))
208	break;
209	}
210
211	*ppszSrc = pszRet;
212	return VINF_SUCCESS;
213	}
214
215
216	RTDECL(int) RTGetOptArgvFromString(char **ppapszArgv, int pcArgs, const char pszCmdLine, const char pszSeparators)
217	{
218	/*
219	* Some input validation.
220	*/
221	AssertPtr(pszCmdLine);
222	AssertPtr(pcArgs);
223	AssertPtr(ppapszArgv);
224	if (!pszSeparators)
225	pszSeparators = " \t\n\r";
226	else
227	AssertPtr(pszSeparators);
228	size_t const cchSeparators = strlen(pszSeparators);
229	AssertReturn(cchSeparators > 0, VERR_INVALID_PARAMETER);
230
231	/*
232	* Parse the command line and chop off it into argv individual argv strings.
233	*/
234	int rc = VINF_SUCCESS;
235	const char *pszSrc = pszCmdLine;
236	char pszDup = (char )RTMemAlloc(strlen(pszSrc) + 1);
237	char *pszDst = pszDup;
238	if (!pszDup)
239	return VERR_NO_STR_MEMORY;
240	char **papszArgs = NULL;
241	unsigned iArg = 0;
242	while (*pszSrc)
243	{
244	/* Skip stuff */
245	rc = rtGetOptSkipDelimiters(&pszSrc, pszSeparators, cchSeparators);
246	if (RT_FAILURE(rc))
247	break;
248	if (!*pszSrc)
249	break;
250
251	/* Start a new entry. */
252	if ((iArg % 32) == 0)
253	{
254	void pvNew = RTMemRealloc(papszArgs, (iArg + 33) sizeof(char *));
255	if (!pvNew)
256	{
257	rc = VERR_NO_MEMORY;
258	break;
259	}
260	papszArgs = (char **)pvNew;
261	}
262	papszArgs[iArg++] = pszDst;
263
264	/* Parse and copy the string over. */
265	RTUNICP CpQuote = 0;
266	RTUNICP Cp;
267	for (;;)
268	{
269	rc = RTStrGetCpEx(&pszSrc, &Cp);
270	if (RT_FAILURE(rc) \|\| !Cp)
271	break;
272	if (!CpQuote)
273	{
274	if (Cp == '"' \|\| Cp == '\'')
275	CpQuote = Cp;
276	else if (rtGetOptIsCpInSet(Cp, pszSeparators, cchSeparators))
277	break;
278	else
279	pszDst = RTStrPutCp(pszDst, Cp);
280	}
281	else if (CpQuote != Cp)
282	pszDst = RTStrPutCp(pszDst, Cp);
283	else
284	CpQuote = 0;
285	}
286	*pszDst++ = '\0';
287	if (RT_FAILURE(rc) \|\| !Cp)
288	break;
289	}
290
291	if (RT_FAILURE(rc))
292	{
293	RTMemFree(pszDup);
294	RTMemFree(papszArgs);
295	return rc;
296	}
297
298	/*
299	* Terminate the array.
300	* Check for empty string to make sure we've got an array.
301	*/
302	if (iArg == 0)
303	{
304	RTMemFree(pszDup);
305	papszArgs = (char *)RTMemAlloc(1 sizeof(char *));
306	if (!papszArgs)
307	return VERR_NO_MEMORY;
308	}
309	papszArgs[iArg] = NULL;
310
311	*pcArgs = iArg;
312	*ppapszArgv = papszArgs;
313	return VINF_SUCCESS;
314	}
315
316
317	RTDECL(void) RTGetOptArgvFree(char **papszArgv)
318	{
319	if (papszArgv)
320	{
321	/*
322	* We've really only _two_ allocations here. Check the code in
323	* RTGetOptArgvFromString for the particulars.
324	*/
325	RTMemFree(papszArgv[0]);
326	RTMemFree(papszArgv);
327	}
328	}
329
330
331	/**
332	* Checks if the argument needs quoting or not.
333	*
334	* @returns true if it needs, false if it don't.
335	* @param pszArg The argument.
336	* @param fFlags Quoting style.
337	* @param pcch Where to store the argument length when quoting
338	* is not required. (optimization)
339	*/
340	DECLINLINE(bool) rtGetOpArgvRequiresQuoting(const char pszArg, uint32_t fFlags, size_t pcch)
341	{
342	char const *psz = pszArg;
343	unsigned char ch;
344	while ((ch = (unsigned char)*psz))
345	{
346	if ( ch < 128
347	&& ASMBitTest(&g_abmQuoteChars[fFlags & RTGETOPTARGV_CNV_QUOTE_MASK], ch))
348	return true;
349	psz++;
350	}
351
352	*pcch = psz - pszArg;
353	return false;
354	}
355
356
357	/**
358	* Grows the command line string buffer.
359	*
360	* @returns VINF_SUCCESS or VERR_NO_STR_MEMORY.
361	* @param ppszCmdLine Pointer to the command line string pointer.
362	* @param pcbCmdLineAlloc Pointer to the allocation length variable.
363	* @param cchMin The minimum size to grow with, kind of.
364	*/
365	static int rtGetOptArgvToStringGrow(char *ppszCmdLine, size_t pcbCmdLineAlloc, size_t cchMin)
366	{
367	size_t cb = *pcbCmdLineAlloc;
368	while (cb < cchMin)
369	cb *= 2;
370	cb *= 2;
371	*pcbCmdLineAlloc = cb;
372	return RTStrRealloc(ppszCmdLine, cb);
373	}
374
375	/**
376	* Checks if we have a sequence of DOS slashes followed by a double quote char.
377	*
378	* @returns true / false accordingly.
379	* @param psz The string.
380	*/
381	DECLINLINE(bool) rtGetOptArgvMsCrtIsSlashQuote(const char *psz)
382	{
383	while (*psz == '\\')
384	psz++;
385	return psz == '"' \|\| psz == '\0';
386	}
387
388
389	RTDECL(int) RTGetOptArgvToString(char *ppszCmdLine, const char const *papszArgv, uint32_t fFlags)
390	{
391	AssertReturn(!(fFlags & ~RTGETOPTARGV_CNV_QUOTE_MASK), VERR_INVALID_PARAMETER);
392
393	#define PUT_CH(ch) \
394	if (RT_UNLIKELY(off + 1 >= cbCmdLineAlloc)) { \
395	rc = rtGetOptArgvToStringGrow(&pszCmdLine, &cbCmdLineAlloc, 1); \
396	if (RT_FAILURE(rc)) \
397	break; \
398	} \
399	pszCmdLine[off++] = (ch)
400
401	#define PUT_PSZ(psz, cch) \
402	if (RT_UNLIKELY(off + (cch) >= cbCmdLineAlloc)) { \
403	rc = rtGetOptArgvToStringGrow(&pszCmdLine, &cbCmdLineAlloc, (cch)); \
404	if (RT_FAILURE(rc)) \
405	break; \
406	} \
407	memcpy(&pszCmdLine[off], (psz), (cch)); \
408	off += (cch);
409	#define PUT_SZ(sz) PUT_PSZ(sz, sizeof(sz) - 1)
410
411	/*
412	* Take the realloc approach, it requires less code and is probably more
413	* efficient than figuring out the size first.
414	*/
415	int rc = VINF_SUCCESS;
416	size_t off = 0;
417	size_t cbCmdLineAlloc = 256;
418	char *pszCmdLine = RTStrAlloc(256);
419	if (!pszCmdLine)
420	return VERR_NO_STR_MEMORY;
421
422	for (size_t i = 0; papszArgv[i]; i++)
423	{
424	if (i > 0)
425	{
426	PUT_CH(' ');
427	}
428
429	/* does it need quoting? */
430	const char *pszArg = papszArgv[i];
431	size_t cchArg;
432	if (!rtGetOpArgvRequiresQuoting(pszArg, fFlags, &cchArg))
433	{
434	/* No quoting needed, just append the argument. */
435	PUT_PSZ(pszArg, cchArg);
436	}
437	else if ((fFlags & RTGETOPTARGV_CNV_QUOTE_MASK) == RTGETOPTARGV_CNV_QUOTE_MS_CRT)
438	{
439	/*
440	* Microsoft CRT quoting. Quote the whole argument in double
441	* quotes to make it easier to read and code.
442	*/
443	PUT_CH('"');
444	char ch;
445	while ((ch = *pszArg++))
446	{
447	if ( ch == '\\'
448	&& rtGetOptArgvMsCrtIsSlashQuote(pszArg))
449	{
450	PUT_SZ("\\\\");
451	}
452	else if (ch == '"')
453	{
454	PUT_SZ("\\\"");
455	}
456	else
457	{
458	PUT_CH(ch);
459	}
460	}
461	PUT_CH('"');
462	}
463	else
464	{
465	/*
466	* Bourne Shell quoting. Quote the whole thing in single quotes
467	* and use double quotes for any single quote chars.
468	*/
469	PUT_CH('\'');
470	char ch;
471	while ((ch = *pszArg++))
472	{
473	if (ch == '\'')
474	{
475	PUT_SZ("'\"'\"'");
476	}
477	else
478	{
479	PUT_CH(ch);
480	}
481	}
482	PUT_CH('\'');
483	}
484	}
485
486	/* Set return value / cleanup. */
487	if (RT_SUCCESS(rc))
488	{
489	pszCmdLine[off] = '\0';
490	*ppszCmdLine = pszCmdLine;
491	}
492	else
493	RTStrFree(pszCmdLine);
494	#undef PUT_SZ
495	#undef PUT_PSZ
496	#undef PUT_CH
497	return rc;
498	}
499
500
501	RTDECL(int) RTGetOptArgvToUtf16String(PRTUTF16 ppwszCmdLine, const char const *papszArgv, uint32_t fFlags)
502	{
503	char *pszCmdLine;
504	int rc = RTGetOptArgvToString(&pszCmdLine, papszArgv, fFlags);
505	if (RT_SUCCESS(rc))
506	{
507	rc = RTStrToUtf16(pszCmdLine, ppwszCmdLine);
508	RTStrFree(pszCmdLine);
509	}
510	return rc;
511	}
512

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source: vbox/trunk/src/VBox/Runtime/common/misc/getoptargv.cpp@ 50795

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