/* $OpenBSD: wsfont.c,v 1.62 2022/04/04 19:53:15 naddy Exp $ */ /* $NetBSD: wsfont.c,v 1.17 2001/02/07 13:59:24 ad Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Andrew Doran. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include "wsfont_glue.h" /* NRASOPS_ROTATION */ #undef HAVE_FONT #ifdef FONT_SPLEEN5x8 #define HAVE_FONT 1 #include #endif #ifdef FONT_SPLEEN6x12 #define HAVE_FONT 1 #include #endif #ifdef FONT_SPLEEN8x16 #define HAVE_FONT 1 #endif #ifdef FONT_SPLEEN12x24 #define HAVE_FONT 1 #endif #ifdef FONT_SPLEEN16x32 #define HAVE_FONT 1 #endif #ifdef FONT_SPLEEN32x64 #define HAVE_FONT 1 #endif #ifdef FONT_BOLD8x16 #define HAVE_FONT 1 #include #endif #ifdef FONT_GALLANT12x22 #define HAVE_FONT 1 #endif #ifdef FONT_BOLD8x16_ISO1 #define HAVE_FONT 1 #include #endif /* * Make sure we always have at least one font. * Unless otherwise configured, all platforms provide both a 8x16 font and a * larger 12x22 font. * Some platforms will however only provide the 8x16 font if option * SMALL_KERNEL. */ #ifndef HAVE_FONT #define HAVE_FONT 1 #define FONT_SPLEEN8x16 #if defined(__sparc64__) #define FONT_GALLANT12x22 #elif defined(__alpha__) || defined(__luna88k__) || defined(__macppc__) || \ !defined(SMALL_KERNEL) #define FONT_SPLEEN12x24 #endif #if !defined(SMALL_KERNEL) && (defined(__amd64__) || defined(__i386__) || \ defined(__arm64__) || defined(__armv7__) || defined(__riscv64__) || \ defined(__powerpc64__)) #define FONT_SPLEEN16x32 #define FONT_SPLEEN32x64 #endif #endif /* HAVE_FONT */ #ifdef FONT_GALLANT12x22 #include #endif #ifdef FONT_SPLEEN8x16 #include #endif #ifdef FONT_SPLEEN12x24 #include #endif #ifdef FONT_SPLEEN16x32 #include #endif #ifdef FONT_SPLEEN32x64 #include #endif struct font { TAILQ_ENTRY(font) chain; struct wsdisplay_font *font; u_short lockcount; u_short cookie; u_short flg; }; TAILQ_HEAD(, font) fontlist; /* Our list of built-in fonts */ static struct font builtin_fonts[] = { #define BUILTIN_FONT(f, c) \ { .font = &(f), .cookie = (c), .lockcount = 0, \ .flg = WSFONT_STATIC | WSFONT_BUILTIN } #ifdef FONT_BOLD8x16 BUILTIN_FONT(bold8x16, 1), #endif #ifdef FONT_BOLD8x16_ISO1 BUILTIN_FONT(bold8x16_iso1, 2), #endif #ifdef FONT_GALLANT12x22 BUILTIN_FONT(gallant12x22, 3), #endif #ifdef FONT_SPLEEN5x8 BUILTIN_FONT(spleen5x8, 4), #endif #ifdef FONT_SPLEEN6x12 BUILTIN_FONT(spleen6x12, 5), #endif #ifdef FONT_SPLEEN8x16 BUILTIN_FONT(spleen8x16, 6), #endif #ifdef FONT_SPLEEN12x24 BUILTIN_FONT(spleen12x24, 7), #endif #ifdef FONT_SPLEEN16x32 BUILTIN_FONT(spleen16x32, 8), #endif #ifdef FONT_SPLEEN32x64 BUILTIN_FONT(spleen32x64, 9), #endif #undef BUILTIN_FONT }; #if !defined(SMALL_KERNEL) || defined(__alpha__) #define INCLUDE_FONT_BIT_ENDIANNESS_SWAP_CODE #endif #ifdef INCLUDE_FONT_BIT_ENDIANNESS_SWAP_CODE /* Reverse the bit order in a byte */ static const u_char reverse[256] = { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, }; #endif static struct font *wsfont_find0(int); #ifdef INCLUDE_FONT_BIT_ENDIANNESS_SWAP_CODE /* * Reverse the bit order of a font */ static void wsfont_revbit(struct wsdisplay_font *); static void wsfont_revbit(struct wsdisplay_font *font) { u_char *p, *m; p = (u_char *)font->data; m = p + font->stride * font->numchars * font->fontheight; for (; p < m; p++) *p = reverse[*p]; } #endif #if !defined(SMALL_KERNEL) /* * Reverse the byte order of a font */ static void wsfont_revbyte(struct wsdisplay_font *); static void wsfont_revbyte(struct wsdisplay_font *font) { int x, l, r, nr; u_char *rp; if (font->stride == 1) return; rp = (u_char *)font->data; nr = font->numchars * font->fontheight; while (nr--) { l = 0; r = font->stride - 1; while (l < r) { x = rp[l]; rp[l] = rp[r]; rp[r] = x; l++, r--; } rp += font->stride; } } #endif /* * Enumerate the list of fonts */ void wsfont_enum(int (*cb)(void *, struct wsdisplay_font *), void *cbarg) { struct font *ent; int s; s = splhigh(); TAILQ_FOREACH(ent, &fontlist, chain) if (cb(cbarg, ent->font) != 0) break; splx(s); } #if NRASOPS_ROTATION > 0 void wsfont_rotate_cw(struct wsdisplay_font *, char *, int); void wsfont_rotate_ccw(struct wsdisplay_font *, char *, int); struct wsdisplay_font *wsfont_rotate_internal(struct wsdisplay_font *, int); void wsfont_rotate_cw(struct wsdisplay_font *font, char *newbits, int newstride) { int b, n, r; /* Rotate the font a bit at a time. */ for (n = 0; n < font->numchars; n++) { char *ch = font->data + (n * font->stride * font->fontheight); for (r = 0; r < font->fontheight; r++) { for (b = 0; b < font->fontwidth; b++) { unsigned char *rb; rb = ch + (font->stride * r) + (b / 8); if (*rb & (0x80 >> (b % 8))) { unsigned char *rrb; rrb = newbits + newstride - 1 - (r / 8) + (n * newstride * font->fontwidth) + (newstride * b); *rrb |= (1 << (r % 8)); } } } } } void wsfont_rotate_ccw(struct wsdisplay_font *font, char *newbits, int newstride) { int b, n, r; /* Rotate the font a bit at a time. */ for (n = 0; n < font->numchars; n++) { char *ch = font->data + (n * font->stride * font->fontheight); for (r = 0; r < font->fontheight; r++) { for (b = 0; b < font->fontwidth; b++) { int bb = font->fontwidth - 1 - b; unsigned char *rb; rb = ch + (font->stride * r) + (b / 8); if (*rb & (0x80 >> (b % 8))) { unsigned char *rrb; rrb = newbits + (r / 8) + (n * newstride * font->fontwidth) + (newstride * bb); *rrb |= (1 << (7 - (r % 8))); } } } } } struct wsdisplay_font * wsfont_rotate_internal(struct wsdisplay_font *font, int ccw) { int newstride; struct wsdisplay_font *newfont; char *newbits; /* Duplicate the existing font... */ newfont = malloc(sizeof *font, M_DEVBUF, M_WAITOK); bcopy(font, newfont, sizeof *font); newfont->cookie = NULL; /* Allocate a buffer big enough for the rotated font. */ newstride = (font->fontheight + 7) / 8; newbits = mallocarray(font->numchars, newstride * font->fontwidth, M_DEVBUF, M_WAITOK | M_ZERO); if (ccw) wsfont_rotate_ccw(font, newbits, newstride); else wsfont_rotate_cw(font, newbits, newstride); newfont->data = newbits; /* Update font sizes. */ newfont->stride = newstride; newfont->fontwidth = font->fontheight; newfont->fontheight = font->fontwidth; if (wsfont_add(newfont, 0) != 0) { /* * If we seem to have rotated this font already, drop the * new one... */ free(newbits, M_DEVBUF, font->numchars * newstride * font->fontwidth); free(newfont, M_DEVBUF, sizeof *font); newfont = NULL; } return (newfont); } int wsfont_rotate(int cookie, int ccw) { int s, ncookie; struct wsdisplay_font *font; struct font *origfont; s = splhigh(); origfont = wsfont_find0(cookie); splx(s); font = wsfont_rotate_internal(origfont->font, ccw); if (font == NULL) return (-1); ncookie = wsfont_find(font->name, font->fontwidth, font->fontheight, font->stride); return (ncookie); } #endif /* NRASOPS_ROTATION */ /* * Initialize list with WSFONT_BUILTIN fonts */ void wsfont_init(void) { static int again; unsigned int i; if (again != 0) return; again = 1; TAILQ_INIT(&fontlist); for (i = 0; i < nitems(builtin_fonts); i++) { TAILQ_INSERT_TAIL(&fontlist, &builtin_fonts[i], chain); } } /* * Find a font by cookie. Called at splhigh. */ static struct font * wsfont_find0(int cookie) { struct font *ent; TAILQ_FOREACH(ent, &fontlist, chain) if (ent->cookie == cookie) return (ent); return (NULL); } /* * Find a font. */ int wsfont_find(const char *name, int width, int height, int stride) { struct font *ent; int s; s = splhigh(); TAILQ_FOREACH(ent, &fontlist, chain) { if (height != 0 && ent->font->fontheight != height) continue; if (width != 0 && ent->font->fontwidth != width) continue; if (stride != 0 && ent->font->stride != stride) continue; if (name != NULL && strcmp(ent->font->name, name) != 0) continue; splx(s); return (ent->cookie); } splx(s); return (-1); } /* * Add a font to the list. */ int wsfont_add(struct wsdisplay_font *font, int copy) { static int cookiegen = 666; struct font *ent; int s, fontc = 0; s = splhigh(); /* Don't allow exact duplicates */ if (wsfont_find(font->name, font->fontwidth, font->fontheight, font->stride) >= 0) { splx(s); return (-1); } TAILQ_FOREACH(ent, &fontlist, chain) fontc++; if (fontc >= WSDISPLAY_MAXFONTCOUNT) { splx(s); return (-1); } ent = (struct font *)malloc(sizeof *ent, M_DEVBUF, M_WAITOK); ent->lockcount = 0; ent->flg = 0; ent->cookie = cookiegen++; /* * If we are coming from a WSDISPLAYIO_LDFONT ioctl, we need to * make a copy of the wsdisplay_font struct, but not of font->bits. */ if (copy) { ent->font = (struct wsdisplay_font *)malloc(sizeof *ent->font, M_DEVBUF, M_WAITOK); memcpy(ent->font, font, sizeof(*ent->font)); ent->flg = 0; } else { ent->font = font; ent->flg = WSFONT_STATIC; } /* Now link into the list and return */ TAILQ_INSERT_TAIL(&fontlist, ent, chain); splx(s); return (0); } /* * Lock a given font and return new lockcount. This fails if the cookie * is invalid, or if the font is already locked and the bit/byte order * requested by the caller differs. */ int wsfont_lock(int cookie, struct wsdisplay_font **ptr, int bitorder, int byteorder) { struct font *ent; int s, lc; s = splhigh(); if ((ent = wsfont_find0(cookie)) != NULL) { if (bitorder && bitorder != ent->font->bitorder) { #ifdef INCLUDE_FONT_BIT_ENDIANNESS_SWAP_CODE if (ent->lockcount) { splx(s); return (-1); } wsfont_revbit(ent->font); ent->font->bitorder = bitorder; #else splx(s); return (-1); #endif } if (byteorder && byteorder != ent->font->byteorder) { #if !defined(SMALL_KERNEL) if (ent->lockcount) { splx(s); return (-1); } wsfont_revbyte(ent->font); ent->font->byteorder = byteorder; #else splx(s); return (-1); #endif } lc = ++ent->lockcount; *ptr = ent->font; } else lc = -1; splx(s); return (lc); } /* * Unlock a given font and return new lockcount. */ int wsfont_unlock(int cookie) { struct font *ent; int s, lc; s = splhigh(); if ((ent = wsfont_find0(cookie)) != NULL) { if (ent->lockcount == 0) panic("wsfont_unlock: font not locked"); lc = --ent->lockcount; } else lc = -1; splx(s); return (lc); } #if !defined(SMALL_KERNEL) /* * Unicode to font encoding mappings */ /* * To save memory, font encoding tables use a two level lookup. * First the high byte of the Unicode is used to lookup the level 2 * table, then the low byte indexes that table. Level 2 tables that are * not needed are omitted (NULL), and both level 1 and level 2 tables * have base and size attributes to keep their size down. */ struct wsfont_level1_glyphmap { const struct wsfont_level2_glyphmap **level2; int base; /* High byte for first level2 entry */ int size; /* Number of level2 entries */ }; struct wsfont_level2_glyphmap { int base; /* Low byte for first character */ int size; /* Number of characters */ const void *chars; /* Pointer to character number entries */ int width; /* Size of each entry in bytes (1,2,4) */ }; /* * IBM 437 maps */ static const u_int8_t ibm437_chars_0[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255,173,155,156, 0, 157, 0, 0, 0, 0, 166,174,170, 0, 0, 0, 0, 241,253, 0, 0, 0, 0, 249, 0, 0, 167,175,172,171, 0, 168, 0, 0, 0, 0, 142,143,146,128, 0, 144, 0, 0, 0, 0, 0, 0, 0, 165, 0, 0, 0, 0, 153, 0, 0, 0, 0, 0, 154, 0, 0, 0, 133,160,131, 0, 132,134,145,135,138,130,136,137,141,161,140,139, 0, 164,149,162,147, 0, 148,246, 0, 151,163,150,129, 0, 0, 152 }, ibm437_chars_1[] = { 159 }, ibm437_chars_3[] = { 226, 0, 0, 0, 0, 233, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 228, 0, 0, 232, 0, 0, 234, 0, 0, 0, 0, 0, 0, 0, 224,225, 0, 235,238, 0, 0, 0, 0, 0, 0, 230, 0, 0, 0, 227, 0, 0, 229,231 }, ibm437_chars_32[] = { 252, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 158 }, ibm437_chars_34[] = { 237, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 248,250,251, 0, 0, 0, 236, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 239, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 247, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,240, 0, 0,243, 242 }, ibm437_chars_35[] = { 169, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 244,245 }, ibm437_chars_37[] = { 196,205,179,186, 0, 0, 0, 0, 0, 0, 0, 0, 218,213,214,201, 191,184,183,187,192,212,211,200,217,190,189,188,195,198, 0, 0, 199, 0, 0, 204,180,181, 0, 0, 182, 0, 0, 185,194, 0, 0, 209, 210, 0, 0, 203,193, 0, 0, 207,208, 0, 0, 202,197, 0, 0, 216, 0, 0, 215, 0, 0, 0, 0, 0, 0, 0, 0, 206, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 223, 0, 0, 0, 220, 0, 0, 0, 219, 0, 0, 0, 221, 0, 0, 0, 222,176,177,178, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 254 }; static const struct wsfont_level2_glyphmap ibm437_level2_0 = { 0, 256, ibm437_chars_0, 1 }, ibm437_level2_1 = { 146, 1, ibm437_chars_1, 1 }, ibm437_level2_3 = { 147, 50, ibm437_chars_3, 1 }, ibm437_level2_32 = { 127, 41, ibm437_chars_32, 1 }, ibm437_level2_34 = { 5, 97, ibm437_chars_34, 1 }, ibm437_level2_35 = { 16, 18, ibm437_chars_35, 1 }, ibm437_level2_37 = { 0, 161, ibm437_chars_37, 1 }; static const struct wsfont_level2_glyphmap *ibm437_level1[] = { &ibm437_level2_0, &ibm437_level2_1, NULL, &ibm437_level2_3, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, &ibm437_level2_32, NULL, &ibm437_level2_34, &ibm437_level2_35, NULL, &ibm437_level2_37 }; static const struct wsfont_level1_glyphmap encodings[] = { /* WSDISPLAY_FONTENC_ISO */ { NULL, 0, 0 }, /* WSDISPLAY_FONTENC_IBM */ { ibm437_level1, 0, nitems(ibm437_level1) } }; #endif /* !SMALL_KERNEL */ /* * Remap Unicode character to glyph */ int wsfont_map_unichar(struct wsdisplay_font *font, int c) { if (font->encoding == WSDISPLAY_FONTENC_ISO) return (c); #if !defined(SMALL_KERNEL) if (font->encoding >= 0 && font->encoding < nitems(encodings)) { int hi = (c >> 8), lo = c & 255; const struct wsfont_level1_glyphmap *map1 = &encodings[font->encoding]; const struct wsfont_level2_glyphmap *map2; hi -= map1->base; if (hi >= 0 && hi < map1->size && (map2 = map1->level2[hi]) != NULL) { lo -= map2->base; if (lo >= 0 && lo < map2->size) { switch (map2->width) { case 1: c = (((u_int8_t *)map2->chars)[lo]); break; case 2: c = (((u_int16_t *)map2->chars)[lo]); break; case 4: c = (((u_int32_t *)map2->chars)[lo]); break; } if (c != 0 || lo == 0) return (c); } } } #endif /* !SMALL_KERNEL */ return (-1); }