win32: handle quoted LIBRARY names in def files

Parse quoted LIBRARY names as a single token and add the default .dll
extension when needed. Allocate the stored name dynamically.

Add a Windows regression test using a quoted name with spaces.

tccpe.c

@@ -1775,10 +1775,26 @@ static char *get_token(char **s, char *f)
     return p;
 }
 
+/* Read a LIBRARY argument whose quotes may protect whitespace. */
+static char *get_libname(char **s, char *f)
+{
+    char *p = trimfront(*s), *e;
+    if (*p != '"')
+        return get_token(s, f);
+    for (e = ++p; *e && *e != '"' && *e != '\r' && *e != '\n'; ++e)
+        ;
+    if (*e != '"' || (unsigned char)e[1] > ' ')
+        return NULL;
+    *s = trimfront(e + 1);
+    *f = **s;
+    *e = 0;
+    return p;
+}
+
 static int pe_load_def(TCCState *s1, int fd)
 {
     int state = 0, ret = -1, dllindex = 0, ord;
-    char dllname[80], *buf, *line, *p, *x, next;
+    char *dllname = NULL, *buf, *line, *p, *x, next;
 
     buf = tcc_load_text(fd);
     if (!buf)
@@ -1792,7 +1808,13 @@ static int pe_load_def(TCCState *s1, int fd)
         case 0:
             if (0 != stricmp(p, "LIBRARY") || next == '\n')
                 goto quit;
-            pstrcpy(dllname, sizeof dllname, get_token(&line, &next));
+            p = get_libname(&line, &next);
+            if (!p || !*p)
+                goto quit;
+            dllname = tcc_malloc(strlen(p) + 5);
+            strcpy(dllname, p);
+            if (!*tcc_fileextension(dllname))
+                strcat(dllname, ".dll");
             ++state;
             break;
         case 1:
@@ -1823,6 +1845,7 @@ skip:
     }
     ret = 0;
 quit:
+    tcc_free(dllname);
     tcc_free(buf);
     return ret;
 }

tests/tests2/147_def_library.c

@@ -0,0 +1,21 @@
+#ifdef DEF_LIBRARY_DLL
+
+__declspec(dllexport) int def_library_value(void)
+{
+    return 42;
+}
+
+#else
+
+#include <stdio.h>
+
+int def_library_value(void);
+
+int main(void)
+{
+    int value = def_library_value();
+    printf("value: %d\n", value);
+    return value != 42;
+}
+
+#endif

tests/tests2/147_def_library.def.in

@@ -0,0 +1,3 @@
+LIBRARY "def library test"
+EXPORTS
+    def_library_value

tests/tests2/147_def_library.expect

@@ -0,0 +1 @@
+value: 42

tests/tests2/Makefile

@@ -37,7 +37,7 @@ ifeq ($(CONFIG_bcheck),no)
  SKIP += 132_bound_test.test
 endif
 ifeq ($(CONFIG_dll),no)
- SKIP += 113_btdll.test # no shared lib support yet
+ SKIP += 113_btdll.test 147_def_library.test # no shared lib support yet
 endif
 ifeq (-$(findstring gcc,$(CC))-,--)
  SKIP += $(patsubst %.expect,%.test,$(GEN-ALWAYS))
@@ -81,6 +81,9 @@ endif
 ifneq (-$(ARCH)-$(CONFIG_WIN32)-,-arm64-yes-)
  SKIP += 145_winarm64_interlocked.test
 endif
+ifneq ($(CONFIG_WIN32),yes)
+ SKIP += 147_def_library.test
+endif
 
 # Some tests might need arguments
 ARGS =
@@ -152,6 +155,14 @@ GEN-ALWAYS =
     $(TCC) -bt $1 a1$(DLLSUF) a2$(DLLSUF) -Wl,-rpath=. -o $(basename $@).exe && \
     ./$(basename $@).exe
 
+# Verify quoted LIBRARY names and the default .dll extension in DEF files.
+147_def_library.test: T1 = \
+    cp $(SRC)/147_def_library.def.in 147_def_library.def && \
+    $(TCC) -D DEF_LIBRARY_DLL -shared $1 -o "def library test.dll" && \
+    $(TCC) $1 147_def_library.def -o $(basename $@).exe && \
+    grep -a -q "def library test.dll" $(basename $@).exe && \
+    ./$(basename $@).exe
+
 114_bound_signal.test: FLAGS += -b
 114_bound_signal.test: NORUN = true # tcc -run does not support fork and -b and SELINUX
 115_bound_setjmp.test: FLAGS += -b