Add w3c html tidy

third_party/tidy/tmbstr.c

@@ -0,0 +1,289 @@
+/* clang-format off */
+/* tmbstr.c -- Tidy string utility functions
+
+  (c) 1998-2006 (W3C) MIT, ERCIM, Keio University
+  See tidy.h for the copyright notice.
+
+*/
+
+#include "third_party/tidy/forward.h"
+#include "third_party/tidy/tmbstr.h"
+#include "libc/fmt/fmt.h"
+#include "third_party/tidy/lexer.h"
+
+/* like strdup but using an allocator */
+tmbstr TY_(tmbstrdup)( TidyAllocator *allocator, ctmbstr str )
+{
+    tmbstr s = NULL;
+    if ( str )
+    {
+        uint len = TY_(tmbstrlen)( str );
+        tmbstr cp = s = (tmbstr) TidyAlloc( allocator, 1+len );
+        while ( 0 != (*cp++ = *str++) )
+            /**/;
+    }
+    return s;
+}
+
+/* like strndup but using an allocator */
+tmbstr TY_(tmbstrndup)( TidyAllocator *allocator, ctmbstr str, uint len )
+{
+    tmbstr s = NULL;
+    if ( str && len > 0 )
+    {
+        tmbstr cp = s = (tmbstr) TidyAlloc( allocator, 1+len );
+        while ( len-- > 0 &&  (*cp++ = *str++) )
+          /**/;
+        *cp = 0;
+    }
+    return s;
+}
+
+/* exactly same as strncpy */
+uint TY_(tmbstrncpy)( tmbstr s1, ctmbstr s2, uint size )
+{
+    if ( s1 != NULL && s2 != NULL )
+    {
+        tmbstr cp = s1;
+        while ( *s2 && --size )  /* Predecrement: reserve byte */
+            *cp++ = *s2++;       /* for NULL terminator. */
+        *cp = 0;
+    }
+    return size;
+}
+
+/* Allows expressions like:  cp += tmbstrcpy( cp, "joebob" );
+*/
+uint TY_(tmbstrcpy)( tmbstr s1, ctmbstr s2 )
+{
+    uint ncpy = 0;
+    while (0 != (*s1++ = *s2++) )
+        ++ncpy;
+    return ncpy;
+}
+
+/* Allows expressions like:  cp += tmbstrcat( cp, "joebob" );
+*/
+uint TY_(tmbstrcat)( tmbstr s1, ctmbstr s2 )
+{
+    uint ncpy = 0;
+    while ( *s1 )
+        ++s1;
+
+    while (0 != (*s1++ = *s2++) )
+        ++ncpy;
+    return ncpy;
+}
+
+/* exactly same as strcmp */
+int TY_(tmbstrcmp)( ctmbstr s1, ctmbstr s2 )
+{
+    int c;
+    while ((c = *s1) == *s2)
+    {
+        if (c == '\0')
+            return 0;
+
+        ++s1;
+        ++s2;
+    }
+
+    return (*s1 > *s2 ? 1 : -1);
+}
+
+/* returns byte count, not char count */
+uint TY_(tmbstrlen)( ctmbstr str )
+{
+    uint len = 0;
+    if ( str )
+    {
+        while ( *str++ )
+            ++len;
+    }
+    return len;
+}
+
+/*
+ MS C 4.2 (and ANSI C) doesn't include strcasecmp.
+ Note that tolower and toupper won't
+ work on chars > 127.
+
+ Neither does ToLower()!
+*/
+int TY_(tmbstrcasecmp)( ctmbstr s1, ctmbstr s2 )
+{
+    uint c;
+
+    while (c = (uint)(*s1), TY_(ToLower)(c) == TY_(ToLower)((uint)(*s2)))
+    {
+        if (c == '\0')
+            return 0;
+
+        ++s1;
+        ++s2;
+    }
+
+    return (*s1 > *s2 ? 1 : -1);
+}
+
+int TY_(tmbstrncmp)( ctmbstr s1, ctmbstr s2, uint n )
+{
+    uint c;
+
+	if (s1 == NULL || s2 == NULL)
+    {
+        if (s1 == s2)
+            return 0;
+        return (s1 == NULL ? -1 : 1);
+    }
+
+    while ((c = (byte)*s1) == (byte)*s2)
+    {
+        if (c == '\0')
+            return 0;
+
+        if (n == 0)
+            return 0;
+
+        ++s1;
+        ++s2;
+        --n;
+    }
+
+    if (n == 0)
+        return 0;
+
+    return (*s1 > *s2 ? 1 : -1);
+}
+
+int TY_(tmbstrncasecmp)( ctmbstr s1, ctmbstr s2, uint n )
+{
+    uint c;
+
+    while (c = (uint)(*s1), TY_(ToLower)(c) == TY_(ToLower)((uint)(*s2)))
+    {
+        if (c == '\0')
+            return 0;
+
+        if (n == 0)
+            return 0;
+
+        ++s1;
+        ++s2;
+        --n;
+    }
+
+    if (n == 0)
+        return 0;
+
+    return (*s1 > *s2 ? 1 : -1);
+}
+
+ctmbstr TY_(tmbsubstrn)( ctmbstr s1, uint len1, ctmbstr s2 )
+{
+    uint len2 = TY_(tmbstrlen)(s2);
+    int ix, diff = len1 - len2;
+
+    for ( ix = 0; ix <= diff; ++ix )
+    {
+        if ( TY_(tmbstrncmp)(s1+ix, s2, len2) == 0 )
+            return (ctmbstr) s1+ix;
+    }
+    return NULL;
+}
+
+ctmbstr TY_(tmbsubstr)( ctmbstr s1, ctmbstr s2 )
+{
+    uint len1 = TY_(tmbstrlen)(s1), len2 = TY_(tmbstrlen)(s2);
+    int ix, diff = len1 - len2;
+
+    for ( ix = 0; ix <= diff; ++ix )
+    {
+        if ( TY_(tmbstrncasecmp)(s1+ix, s2, len2) == 0 )
+            return (ctmbstr) s1+ix;
+    }
+    return NULL;
+}
+
+/* Transform ASCII chars in string to lower case */
+tmbstr TY_(tmbstrtolower)( tmbstr s )
+{
+    tmbstr cp;
+    for ( cp=s; *cp; ++cp )
+        *cp = (tmbchar) TY_(ToLower)( *cp );
+    return s;
+}
+
+/* Transform ASCII chars in string to upper case */
+tmbstr TY_(tmbstrtoupper)(tmbstr s)
+{
+    tmbstr cp;
+
+    for (cp = s; *cp; ++cp)
+        *cp = (tmbchar)TY_(ToUpper)(*cp);
+
+    return s;
+}
+
+int TY_(tmbvsnprintf)(tmbstr buffer, size_t count, ctmbstr format, va_list args)
+{
+    int retval;
+
+#if HAS_VSNPRINTF
+    retval = vsnprintf(buffer, count - 1, format, args);
+    /* todo: conditionally null-terminate the string? */
+    buffer[count - 1] = 0;
+#else
+    retval = vsprintf(buffer, format, args);
+#endif /* HAS_VSNPRINTF */
+    return retval;
+}
+
+int TY_(tmbsnprintf)(tmbstr buffer, size_t count, ctmbstr format, ...)
+{
+    int retval;
+    va_list args;
+    va_start(args, format);
+    retval = TY_(tmbvsnprintf)(buffer, count, format, args);
+    va_end(args);
+    return retval;
+}
+
+void TY_(strrep)(tmbstr buffer, ctmbstr str, ctmbstr rep)
+{
+    char *p = strstr(buffer, str);
+    do
+    {
+        if(p)
+        {
+            char buf[1024];
+            memset(buf,'\0',strlen(buf));
+
+            if(buffer == p)
+            {
+                strcpy(buf,rep);
+                strcat(buf,p+strlen(str));
+            }
+            else
+            {
+                strncpy(buf,buffer,strlen(buffer) - strlen(p));
+                strcat(buf,rep);
+                strcat(buf,p+strlen(str));
+            }
+
+            memset(buffer,'\0',strlen(buffer));
+            strcpy(buffer,buf);
+        }
+
+    } while(p && (p = strstr(buffer, str)));
+}
+
+
+/*
+ * local variables:
+ * mode: c
+ * indent-tabs-mode: nil
+ * c-basic-offset: 4
+ * eval: (c-set-offset 'substatement-open 0)
+ * end:
+ */