Upload 2.0.2

[physicsfs] / extras / ignorecase.c

diff --git a/extras/ignorecase.c b/extras/ignorecase.c
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+/** \file ignorecase.c */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "physfs.h"
+#include "ignorecase.h"
+
+/**
+ * Please see ignorecase.h for details.
+ *
+ * License: this code is public domain. I make no warranty that it is useful,
+ *  correct, harmless, or environmentally safe.
+ *
+ * This particular file may be used however you like, including copying it
+ *  verbatim into a closed-source project, exploiting it commercially, and
+ *  removing any trace of my name from the source (although I hope you won't
+ *  do that). I welcome enhancements and corrections to this file, but I do
+ *  not require you to send me patches if you make changes. This code has
+ *  NO WARRANTY.
+ *
+ * Unless otherwise stated, the rest of PhysicsFS falls under the zlib license.
+ *  Please see LICENSE.txt in the root of the source tree.
+ *
+ *  \author Ryan C. Gordon.
+ */
+
+/* I'm not screwing around with stricmp vs. strcasecmp... */
+/* !!! FIXME: this will NOT work with UTF-8 strings in physfs2.0 */
+static int caseInsensitiveStringCompare(const char *x, const char *y)
+{
+    int ux, uy;
+    do
+    {
+        ux = toupper((int) *x);
+        uy = toupper((int) *y);
+        if (ux != uy)
+            return((ux > uy) ? 1 : -1);
+        x++;
+        y++;
+    } while ((ux) && (uy));
+
+    return(0);
+} /* caseInsensitiveStringCompare */
+
+
+static int locateOneElement(char *buf)
+{
+    char *ptr;
+    char **rc;
+    char **i;
+
+    if (PHYSFS_exists(buf))
+        return(1);  /* quick rejection: exists in current case. */
+
+    ptr = strrchr(buf, '/');  /* find entry at end of path. */
+    if (ptr == NULL)
+    {
+        rc = PHYSFS_enumerateFiles("/");
+        ptr = buf;
+    } /* if */
+    else
+    {
+        *ptr = '\0';
+        rc = PHYSFS_enumerateFiles(buf);
+        *ptr = '/';
+        ptr++;  /* point past dirsep to entry itself. */
+    } /* else */
+
+    for (i = rc; *i != NULL; i++)
+    {
+        if (caseInsensitiveStringCompare(*i, ptr) == 0)
+        {
+            strcpy(ptr, *i); /* found a match. Overwrite with this case. */
+            PHYSFS_freeList(rc);
+            return(1);
+        } /* if */
+    } /* for */
+
+    /* no match at all... */
+    PHYSFS_freeList(rc);
+    return(0);
+} /* locateOneElement */
+
+
+int PHYSFSEXT_locateCorrectCase(char *buf)
+{
+    int rc;
+    char *ptr;
+    char *prevptr;
+
+    while (*buf == '/')  /* skip any '/' at start of string... */
+        buf++;
+
+    ptr = prevptr = buf;
+    if (*ptr == '\0')
+        return(0);  /* Uh...I guess that's success. */
+
+    while (ptr = strchr(ptr + 1, '/'))
+    {
+        *ptr = '\0';  /* block this path section off */
+        rc = locateOneElement(buf);
+        *ptr = '/'; /* restore path separator */
+        if (!rc)
+            return(-2);  /* missing element in path. */
+    } /* while */
+
+    /* check final element... */
+    return(locateOneElement(buf) ? 0 : -1);
+} /* PHYSFSEXT_locateCorrectCase */
+
+
+#ifdef TEST_PHYSFSEXT_LOCATECORRECTCASE
+int main(int argc, char **argv)
+{
+    int rc;
+    char buf[128];
+    PHYSFS_File *f;
+
+    if (!PHYSFS_init(argv[0]))
+    {
+        fprintf(stderr, "PHYSFS_init(): %s\n", PHYSFS_getLastError());
+        return(1);
+    } /* if */
+
+    if (!PHYSFS_addToSearchPath(".", 1))
+    {
+        fprintf(stderr, "PHYSFS_addToSearchPath(): %s\n", PHYSFS_getLastError());
+        PHYSFS_deinit();
+        return(1);
+    } /* if */
+
+    if (!PHYSFS_setWriteDir("."))
+    {
+        fprintf(stderr, "PHYSFS_setWriteDir(): %s\n", PHYSFS_getLastError());
+        PHYSFS_deinit();
+        return(1);
+    } /* if */
+
+    if (!PHYSFS_mkdir("/a/b/c"))
+    {
+        fprintf(stderr, "PHYSFS_mkdir(): %s\n", PHYSFS_getLastError());
+        PHYSFS_deinit();
+        return(1);
+    } /* if */
+
+    if (!PHYSFS_mkdir("/a/b/C"))
+    {
+        fprintf(stderr, "PHYSFS_mkdir(): %s\n", PHYSFS_getLastError());
+        PHYSFS_deinit();
+        return(1);
+    } /* if */
+
+    f = PHYSFS_openWrite("/a/b/c/x.txt");
+    PHYSFS_close(f);
+    if (f == NULL)
+    {
+        fprintf(stderr, "PHYSFS_openWrite(): %s\n", PHYSFS_getLastError());
+        PHYSFS_deinit();
+        return(1);
+    } /* if */
+
+    f = PHYSFS_openWrite("/a/b/C/X.txt");
+    PHYSFS_close(f);
+    if (f == NULL)
+    {
+        fprintf(stderr, "PHYSFS_openWrite(): %s\n", PHYSFS_getLastError());
+        PHYSFS_deinit();
+        return(1);
+    } /* if */
+
+    strcpy(buf, "/a/b/c/x.txt");
+    rc = PHYSFSEXT_locateCorrectCase(buf);
+    if ((rc != 0) || (strcmp(buf, "/a/b/c/x.txt") != 0))
+        printf("test 1 failed\n");
+
+    strcpy(buf, "/a/B/c/x.txt");
+    rc = PHYSFSEXT_locateCorrectCase(buf);
+    if ((rc != 0) || (strcmp(buf, "/a/b/c/x.txt") != 0))
+        printf("test 2 failed\n");
+
+    strcpy(buf, "/a/b/C/x.txt");
+    rc = PHYSFSEXT_locateCorrectCase(buf);
+    if ((rc != 0) || (strcmp(buf, "/a/b/C/X.txt") != 0))
+        printf("test 3 failed\n");
+
+    strcpy(buf, "/a/b/c/X.txt");
+    rc = PHYSFSEXT_locateCorrectCase(buf);
+    if ((rc != 0) || (strcmp(buf, "/a/b/c/x.txt") != 0))
+        printf("test 4 failed\n");
+
+    strcpy(buf, "/a/b/c/z.txt");
+    rc = PHYSFSEXT_locateCorrectCase(buf);
+    if ((rc != -1) || (strcmp(buf, "/a/b/c/z.txt") != 0))
+        printf("test 5 failed\n");
+
+    strcpy(buf, "/A/B/Z/z.txt");
+    rc = PHYSFSEXT_locateCorrectCase(buf);
+    if ((rc != -2) || (strcmp(buf, "/a/b/Z/z.txt") != 0))
+        printf("test 6 failed\n");
+
+    printf("Testing completed.\n");
+    printf("  If no errors were reported, you're good to go.\n");
+
+    PHYSFS_delete("/a/b/c/x.txt");
+    PHYSFS_delete("/a/b/C/X.txt");
+    PHYSFS_delete("/a/b/c");
+    PHYSFS_delete("/a/b/C");
+    PHYSFS_delete("/a/b");
+    PHYSFS_delete("/a");
+    PHYSFS_deinit();
+    return(0);
+} /* main */
+#endif
+
+/* end of ignorecase.c ... */
+