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common,w32: Refine the command line parsing for \ in quotes. 

* common/t-w32-cmdline.c (test_all): Add new test cases.
* common/w32-misc.c (strip_one_arg): Add arg endquote.
(parse_cmdstring): Take care of backslashes in quotes.
--

I found some new test vectors from Microsoft.
This commit is contained in:
Werner Koch 2021-03-04 12:30:30 +01:00
parent 8e15506d66
commit 20c6007686
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GPG Key ID: E3FDFF218E45B72B
2 changed files with 33 additions and 6 deletions
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12
common/t-w32-cmdline.c
View File

@ -59,8 +59,18 @@ test_all (void)
{ "a\\\\\\b d\"e f\"g h", 3, { "a\\\\\\b", "de fg", "h" }},
{ "a\\\\\\\"b c d", 3, { "a\\\"b", "c", "d" }},
{ "a\\\\\\\\\"b c\" d e", 3, { "a\\\\b c", "d", "e" }},
/* Examples from "Parsing C Command-Line Arguments" dated 11/09/2020.
* https://docs.microsoft.com/en-us/cpp/c-language/\
* parsing-c-command-line-arguments?view=msvc-160
*/
{ "\"a b c\" d e", 3, { "a b c", "d", "e" }},
{ "\"ab\\\"c\" \"\\\\\" d", 3, { "ab\"c", "\\", "d" }},
{ "a\\\\\\b d\"e f\"g h", 3, { "a\\\\\\b", "de fg", "h" }},
{ "a\\\\\\\"b c d", 3, { "a\\\"b", "c", "d" }},
{ "a\\\\\\\\\"b c\" d e", 3, { "a\\\\b c", "d", "e" }},
{ "a\"b\"\" c d", 1, { "ab\" c d" }},
/* Some arbitrary tests created using mingw.
* But I am nire sure whether their parser is fully correct.
* But I am not sure whether their parser is fully correct.
*/
{ "e:a a b\"c\" ", 3, { "e:a", "a", "bc" }},
/* { "e:a a b\"c\"\" d\"\"e \" ", */

27
common/w32-misc.c
View File

@ -46,7 +46,7 @@ count_backslashes (const char *s)
static void
strip_one_arg (char *string)
strip_one_arg (char *string, int endquote)
{
char *s, *d;
unsigned int n, i;
@ -62,6 +62,12 @@ strip_one_arg (char *string)
if ((n&1)) /* Odd number of backslashes. */
*d++ = '"'; /* Print the quote. */
}
else if (!s[n] && endquote)
{
for (i=0; i < n/2; i++)
*d++ = '\\';
s--;
}
else /* Print all backslashes. */
{
for (i=0; i < n; i++)
@ -94,10 +100,21 @@ parse_cmdstring (char *string, char **argv)
{
if (*p == '\\' && p[1] == '"')
p++;
else if (*p == '\\' && p[1] == '\\')
p++;
else if (*p == '"')
{
if (argv && (p[1] == ' ' || p[1] == '\t' || !p[1]))
*p = 0;
if (p[1] == ' ' || p[1] == '\t' || !p[1])
{
if (argv)
{
*p = 0;
strip_one_arg (p0, 1);
argv[argc] = p0;
}
argc++;
p0 = NULL;
}
inquote = 0;
}
}
@ -126,7 +143,7 @@ parse_cmdstring (char *string, char **argv)
if (argv)
{
*p = 0;
strip_one_arg (p0);
strip_one_arg (p0, inquote);
argv[argc] = p0;
}
argc++;
@ -144,7 +161,7 @@ parse_cmdstring (char *string, char **argv)
if (argv)
{
*p = 0;
strip_one_arg (p0);
strip_one_arg (p0, inquote);
argv[argc] = p0;
}
argc++;