[3019] | 1 | /*
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| 2 | * Fix the Netscape executable for specified font widths
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| 3 | *
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| 4 | * (c) 1999 Copyright by Sergey Babkin
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| 5 | * see COPYRIGHT
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| 6 | */
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| 7 |
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| 8 | #include <sys/types.h>
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| 9 | #include <fcntl.h>
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| 10 | #include <stdio.h>
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| 11 | #include <locale.h>
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| 12 | #include <unistd.h>
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| 13 |
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| 14 | /************************** DEFINES *************************/
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| 15 |
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| 16 | #undef DEBUG
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| 17 |
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| 18 | /* we can handle at most this many fonts */
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| 19 | #define MAXFONTS 20
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| 20 |
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| 21 | /* maximal line buffer size */
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| 22 | #define MAXLINE 512
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| 23 |
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| 24 | /* there may be multiple strings with the same contents */
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| 25 | #define MAXDUPS 10
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| 26 |
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| 27 | /* file read buffer size */
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| 28 | #define FILEBF 40960
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| 29 |
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| 30 | /* bits in the hardware page offset */
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| 31 | #define BITSPERPAGE 12
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| 32 |
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| 33 | /* size of page in bytes */
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| 34 | #define PAGESIZE (1<<BITSPERPAGE)
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| 35 |
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| 36 | /* mask of the in-page offset */
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| 37 | #define PAGEMASK (PAGESIZE-1)
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| 38 |
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| 39 | /* this is machine-dependent! */
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| 40 | typedef short t2b; /* 2-byte type */
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| 41 | typedef int t4b; /* 4-byte type */
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| 42 | typedef int tptr; /* integer type with the same size as pointer */
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| 43 |
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| 44 | struct bbox { /* bounding box */
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| 45 | t2b llx; /* lower-left-x */
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| 46 | t2b lly;
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| 47 | t2b urx;
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| 48 | t2b ury; /* upper-right-y */
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| 49 | };
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| 50 |
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| 51 | struct glyphmetrics { /* metrics of one glyph */
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| 52 | t2b width;
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| 53 | t2b unknown;
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| 54 | struct bbox bbox;
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| 55 | };
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| 56 |
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| 57 | struct fontmetrics { /* metrics of the wholefont */
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| 58 | tptr name;
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| 59 | struct bbox bbox;
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| 60 | t2b underlinepos;
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| 61 | t2b underlinethick;
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| 62 | struct glyphmetrics glyphs[256];
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| 63 | };
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| 64 |
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| 65 | struct font {
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| 66 | char nsname[MAXLINE]; /* name in the Netscape binary */
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| 67 | char afmname[MAXLINE]; /* name of the .afm file */
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| 68 | char pfaname[MAXLINE]; /* name of the .pfa (or .pfb) file */
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| 69 | struct fontmetrics metrics;
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| 70 | off_t binoff; /* offset in the binary */
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| 71 | };
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| 72 |
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| 73 | #define SCONST(x) (x), ((sizeof (x))-1)
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| 74 |
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| 75 | /************************** GLOBALS *************************/
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| 76 |
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| 77 | struct font font[MAXFONTS];
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| 78 | int nfonts=0;
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| 79 |
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| 80 | char msg[MAXLINE];
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| 81 |
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| 82 | /*************************** PROTOTYPES **********************/
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| 83 |
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| 84 | void usage(void);
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| 85 | void readconfig( char *fn);
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| 86 | void readmetrics(void);
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| 87 | void replacefonts( char *fn);
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| 88 |
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| 89 | /************************** main ****************************/
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| 90 |
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| 91 | main(ac, av)
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| 92 | int ac;
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| 93 | char **av;
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| 94 | {
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| 95 | setlocale(LC_ALL, "");
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| 96 |
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| 97 | if(ac!=3) {
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| 98 | usage(); exit(1);
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| 99 | }
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| 100 |
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| 101 | readconfig(av[2]);
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| 102 | readmetrics();
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| 103 | replacefonts( av[1]);
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| 104 | }
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| 105 |
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| 106 | /************************** usage ***************************/
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| 107 |
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| 108 | void
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| 109 | usage(void)
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| 110 | {
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| 111 | fprintf(stderr,"Use:\n");
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| 112 | fprintf(stderr," nsfix <netscape.bin> <config-file>\n");
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| 113 | }
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| 114 |
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| 115 |
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| 116 | /************************** readconfig **********************/
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| 117 |
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| 118 | void
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| 119 | readconfig(fn)
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| 120 | char *fn;
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| 121 | {
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| 122 | char s[MAXLINE];
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| 123 | char afmsuffix[MAXLINE], pfasuffix[MAXLINE];
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| 124 | int lineno=0;
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| 125 | FILE *f;
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| 126 |
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| 127 | if(( f=fopen(fn, "r") )==NULL) {
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| 128 | sprintf(msg,"nsfix: open %s",fn);
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| 129 | perror(msg);
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| 130 | exit(1);
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| 131 | }
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| 132 |
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| 133 | while( fgets(s, MAXLINE, f) ) {
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| 134 | lineno++;
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| 135 | if(s[0]=='#' || s[0]=='\n')
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| 136 | continue;
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| 137 |
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| 138 | if(nfonts>=MAXFONTS) {
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| 139 | fprintf(stderr, "nsfix: only %d fonts are supported at once\n",
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| 140 | MAXFONTS);
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| 141 | exit(1);
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| 142 | }
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| 143 |
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| 144 | if( sscanf(s, "%s %s %s %s", font[nfonts].nsname,
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| 145 | font[nfonts].afmname, afmsuffix, pfasuffix) != 4 ) {
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| 146 | fprintf(stderr, "nsfix: syntax error at line %d of %s\n",
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| 147 | lineno, fn);
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| 148 | exit(1);
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| 149 | }
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| 150 | strcpy(font[nfonts].pfaname, font[nfonts].afmname);
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| 151 | strcat(font[nfonts].afmname, afmsuffix);
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| 152 | strcat(font[nfonts].pfaname, pfasuffix);
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| 153 | nfonts++;
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| 154 | }
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| 155 |
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| 156 | if(nfonts==0) {
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| 157 | fprintf(stderr, "nsfix: no fonts are defined in %s\n", fn);
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| 158 | exit(1);
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| 159 | }
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| 160 | fclose(f);
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| 161 | }
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| 162 |
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| 163 | /************************** readmetrics *********************/
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| 164 |
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| 165 | void
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| 166 | readmetrics(void)
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| 167 | {
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| 168 | int i;
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| 169 | char s[MAXLINE];
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| 170 | FILE *f;
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| 171 | int n;
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| 172 | int lineno;
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| 173 | int code, width, llx, lly, urx, ury;
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| 174 | char gn[MAXLINE];
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| 175 | struct glyphmetrics *gm;
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| 176 |
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| 177 | for(i=0; i<nfonts; i++) {
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| 178 | if(( f=fopen(font[i].afmname, "r") )==NULL) {
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| 179 | sprintf(msg,"nsfix: open %s", font[i].afmname);
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| 180 | perror(msg);
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| 181 | exit(1);
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| 182 | }
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| 183 | lineno=0;
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| 184 | while( fgets(s, MAXLINE, f) ) {
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| 185 | lineno++;
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| 186 | if( !strncmp(s, SCONST("UnderlineThickness ")) ) {
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| 187 | if( sscanf(s, "UnderlineThickness %d", &n) <1) {
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| 188 | fprintf(stderr, "nsfix: weird UnderlineThickness at line %d in %s\n",
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| 189 | lineno, font[i].afmname);
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| 190 | exit(1);
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| 191 | }
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| 192 | font[i].metrics.underlinethick=n;
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| 193 | } else if( !strncmp(s, SCONST("UnderlinePosition ")) ) {
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| 194 | if( sscanf(s, "UnderlinePosition %d", &n) <1) {
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| 195 | fprintf(stderr, "nsfix: weird UnderlinePosition at line %d in %s\n",
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| 196 | lineno, font[i].afmname);
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| 197 | exit(1);
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| 198 | }
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| 199 | font[i].metrics.underlinepos=n;
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| 200 | } else if( !strncmp(s, SCONST("FontBBox ")) ) {
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| 201 | if( sscanf(s, "FontBBox %d %d %d %d", &llx, &lly, &urx, &ury) <4) {
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| 202 | fprintf(stderr, "nsfix: weird FontBBox at line %d in %s\n",
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| 203 | lineno, font[i].afmname);
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| 204 | exit(1);
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| 205 | }
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| 206 | font[i].metrics.bbox.llx=llx;
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| 207 | font[i].metrics.bbox.lly=lly;
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| 208 | font[i].metrics.bbox.urx=urx;
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| 209 | font[i].metrics.bbox.ury=ury;
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| 210 | } else if( !strncmp(s, SCONST("C ")) ) {
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| 211 | if( sscanf(s, "C %d ; WX %d ; N %s ; B %d %d %d %d",
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| 212 | &code, &width, &gn, &llx, &lly, &urx, &ury) <7)
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| 213 | {
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| 214 | fprintf(stderr, "nsfix: weird metrics at line %d in %s\n",
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| 215 | lineno, font[i].afmname);
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| 216 | exit(1);
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| 217 | }
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| 218 | if(code>=32 && code<=255) {
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| 219 | font[i].metrics.glyphs[code].width=width;
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| 220 | font[i].metrics.glyphs[code].bbox.llx=llx;
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| 221 | font[i].metrics.glyphs[code].bbox.lly=lly;
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| 222 | font[i].metrics.glyphs[code].bbox.urx=urx;
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| 223 | font[i].metrics.glyphs[code].bbox.ury=ury;
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| 224 | }
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| 225 | }
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| 226 | }
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| 227 | fclose(f);
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| 228 | }
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| 229 |
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| 230 | #ifdef DEBUG
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| 231 | for(i=0; i<nfonts; i++) {
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| 232 | printf("Font %s\n", font[i].nsname);
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| 233 | for(n=0; n<256; n++) {
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| 234 | gm= &font[i].metrics.glyphs[n];
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| 235 | printf(" %d w=%4d [%4d %4d %4d %4d]", n, gm->width,
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| 236 | gm->bbox.llx, gm->bbox.lly, gm->bbox.urx, gm->bbox.ury);
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| 237 | printf(" w=0x%04x [0x%04x 0x%04x 0x%04x 0x%04x]\n", gm->width & 0xffff,
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| 238 | gm->bbox.llx & 0xffff, gm->bbox.lly & 0xffff, gm->bbox.urx & 0xffff, gm->bbox.ury & 0xffff);
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| 239 | }
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| 240 | }
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| 241 |
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| 242 | exit(0);
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| 243 | #endif
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| 244 |
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| 245 | }
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| 246 |
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| 247 | /************************** replacefonts ********************/
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| 248 |
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| 249 | void
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| 250 | replacefonts(fn)
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| 251 | char *fn;
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| 252 | {
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| 253 | int f; /* don't use stdio */
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| 254 | char bf[FILEBF];
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| 255 | char *bfend, *p;
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| 256 | int len;
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| 257 | off_t pos;
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| 258 |
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| 259 | off_t zerooff[MAXFONTS*MAXDUPS]; /* offset of zero strings */
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| 260 | tptr nameaddr[MAXFONTS*MAXDUPS]; /* name pointers before these zero strings */
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| 261 | int zeroid[MAXFONTS*MAXDUPS]; /* font number for this zero block */
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| 262 | int nzeroes;
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| 263 | short matched[MAXFONTS]; /* counters how many matches we have for each requested font */
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| 264 | struct fontmetrics *fp;
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| 265 |
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| 266 | struct {
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| 267 | int noff;
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| 268 | int nz;
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| 269 | off_t off[MAXDUPS]; /* there may be multiple strings with the same contents */
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| 270 | } o[MAXFONTS];
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| 271 | int maxnlen;
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| 272 | int i, j, k, n;
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| 273 |
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| 274 | static struct glyphmetrics gm[32]; /* 0-initialized */
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| 275 |
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| 276 |
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| 277 | if(( f=open(fn, O_RDWR) )<0) {
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| 278 | sprintf(msg,"nsfix: open %s",fn);
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| 279 | perror(msg);
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| 280 | exit(1);
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| 281 | }
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| 282 |
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| 283 |
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| 284 | /* get the maximal font name length */
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| 285 | maxnlen=0;
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| 286 | for(i=0; i<nfonts; i++) {
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| 287 | o[i].noff=o[i].nz=0;
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| 288 | matched[i]=0;
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| 289 | len=strlen(font[i].nsname)+1;
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| 290 | if(len>maxnlen)
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| 291 | maxnlen=len;
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| 292 | }
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| 293 |
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| 294 | /* fprintf(stderr,"maxnlen= 0x%x\n", maxnlen); /* */
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| 295 | /* try to find the literal strings of the font names */
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| 296 | pos=0; bfend=bf;
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| 297 | while(( len=read(f, bfend, FILEBF-(bfend-bf)) )>=0 ) {
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| 298 | /* fprintf(stderr,"looking at 0x%lx\n", (long)pos); /* */
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| 299 | /* the last position to check */
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| 300 | if(len>=maxnlen)
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| 301 | /* leave the rest with the next block */
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| 302 | bfend+= len-maxnlen;
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| 303 | else {
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| 304 | /* we are very near to the end of file, check
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| 305 | * up to the very last byte */
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| 306 | bfend+= len-2;
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| 307 | memset(bfend+2, 0, maxnlen);
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| 308 | }
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| 309 |
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| 310 | for(p=bf; p<=bfend; p++)
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| 311 | for(i=0; i<nfonts; i++)
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| 312 | if(!strcmp(font[i].nsname, p) && o[i].noff<MAXDUPS) {
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| 313 | o[i].off[ o[i].noff++ ] = pos + (p-bf);
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| 314 | fprintf(stderr,"found %s at 0x%lx\n", font[i].nsname, (long)pos + (p-bf));
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| 315 | }
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| 316 |
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| 317 | if(len==0)
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| 318 | break;
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| 319 |
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| 320 | memmove(bf, bfend, maxnlen);
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| 321 | pos+= (bfend-bf);
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| 322 | bfend= (bf+maxnlen);
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| 323 | }
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| 324 | if(len<0) {
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| 325 | sprintf(msg,"nsfix: read %s",fn);
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| 326 | perror(msg);
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| 327 | exit(1);
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| 328 | }
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| 329 | fprintf(stderr,"---\n");
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| 330 | /* if there are any dups try to resolve them */
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| 331 | for(i=0; i<nfonts; i++) {
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| 332 | if(o[i].noff==0) {
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| 333 | fprintf(stderr, "nsfix: font %s (%d of %d) is missing in %s\n",
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| 334 | font[i].nsname, i, nfonts, fn);
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| 335 | exit(1);
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| 336 | }
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| 337 | if(o[i].noff!=1)
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| 338 | continue;
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| 339 | /* good, only one entry */
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| 340 | fprintf(stderr,"found unique %s at 0x%lx\n", font[i].nsname, (long)o[i].off[0] );
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| 341 | /* if any dupped entry is right after this one then it's good */
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| 342 | /* if it's farther than PAGESIZE/2 then it's bad */
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| 343 | pos=o[i].off[0]+strlen(font[i].nsname)+1;
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| 344 | for(j=0; j<MAXFONTS; j++) {
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| 345 | if(o[j].noff<=1)
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| 346 | continue;
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| 347 | for(k=0; k<o[j].noff; k++) {
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| 348 | if(o[j].off[k]==pos) { /* good */
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| 349 | fprintf(stderr,"got unique %s at 0x%lx\n", font[j].nsname, (long)pos );
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| 350 | o[j].off[0]=pos;
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| 351 | o[j].noff=1;
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| 352 | break;
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| 353 | }
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| 354 | if(o[j].off[k] < pos - PAGESIZE/2
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| 355 | || o[j].off[k] > pos + PAGESIZE/2) { /* bad */
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| 356 | fprintf(stderr, "eliminated %s at 0x%lx\n", font[j].nsname, (long)o[j].off[k] );
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| 357 | for(n=k+1; n<o[j].noff; n++)
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| 358 | o[j].off[n-1]=o[j].off[n];
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| 359 | o[j].noff--;
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| 360 | k--;
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| 361 | }
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| 362 | }
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| 363 | if(o[j].noff==1 && j<i) { /* have to revisit this font */
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| 364 | i=j-1; /* compensate for i++ */
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| 365 | break;
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| 366 | }
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| 367 | }
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| 368 | }
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| 369 |
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| 370 |
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| 371 | /* try to find the metric tables in the executable */
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| 372 | if(lseek(f, (off_t)0, SEEK_SET)<0) {
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| 373 | sprintf(msg,"nsfix: rewind %s",fn);
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| 374 | perror(msg);
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| 375 | exit(1);
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| 376 | }
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| 377 |
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| 378 | /*
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| 379 | * search for the zeroes in place of the metrics for the codes 0-31:
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| 380 | * 4-byte aligned strings of (32*sizeof(struct glyphmetrics)) zero bytes
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| 381 | */
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| 382 | maxnlen=sizeof(struct fontmetrics);
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| 383 |
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| 384 | pos=0; bfend=bf; nzeroes=0;
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| 385 | while(( len=read(f, bfend, FILEBF-(bfend-bf)) )>=0 ) {
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| 386 | /* fprintf(stderr,"looking at 0x%lx\n", (long)pos); /* */
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| 387 | /* the last position to check */
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| 388 | bfend+= len-maxnlen; /* don't look beyond the EOF */
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| 389 |
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| 390 | for(p=bf; p<=bfend; p+=4 /* 4-byte aligned */ ) {
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| 391 | fp=(struct fontmetrics *)p;
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| 392 | if(fp->name==0)
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| 393 | continue;
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| 394 | if( memcmp(gm, fp->glyphs, sizeof gm) )
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| 395 | continue;
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| 396 |
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| 397 | /* OK, looks like it, see if we can match it to any name */
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| 398 | n= fp->name & PAGEMASK;
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| 399 | for(i=0; i<nfonts; i++) {
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| 400 | for(j=0; j<o[i].noff; j++)
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| 401 | if( n==(o[i].off[j] & PAGEMASK) ) {
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| 402 | zerooff[nzeroes]= pos + (p-bf);
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| 403 | nameaddr[nzeroes]= fp->name;
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| 404 | zeroid[nzeroes]=i;
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| 405 | o[i].nz++;
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| 406 | fprintf(stderr, "matched %s at 0x%lx\n",
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| 407 | font[i].nsname, (long) zerooff[nzeroes]);
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| 408 | nzeroes++;
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| 409 | matched[i]++;
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| 410 | break;
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| 411 | }
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| 412 | }
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| 413 |
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| 414 | }
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| 415 |
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| 416 | if(len==0)
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| 417 | break;
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| 418 |
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| 419 | memmove(bf, bfend, maxnlen);
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| 420 | pos+= (bfend-bf);
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| 421 | bfend= (bf+maxnlen);
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| 422 | }
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---|
| 423 | if(len<0) {
|
---|
| 424 | sprintf(msg,"nsfix: read %s",fn);
|
---|
| 425 | perror(msg);
|
---|
| 426 | exit(1);
|
---|
| 427 | }
|
---|
| 428 | fprintf(stderr,"---\n");
|
---|
| 429 |
|
---|
| 430 | /* make sure that all the fonts got one match */
|
---|
| 431 | k=0; /* flag: have non-matched fonts */ n=0; /* flag: have ambiguities */
|
---|
| 432 | for(i=0; i<nfonts; i++)
|
---|
| 433 | if(matched[i]==0)
|
---|
| 434 | k=1;
|
---|
| 435 | else if(matched[i]>1)
|
---|
| 436 | n=1;
|
---|
| 437 |
|
---|
| 438 | if(k) {
|
---|
| 439 | fprintf(stderr,"nsfix: can't find match for some of the fonts\n");
|
---|
| 440 | fprintf(stderr,"nsfix: maybe wrong byte order, aborting\n");
|
---|
| 441 | exit(1);
|
---|
| 442 | }
|
---|
| 443 | if(n) {
|
---|
| 444 | fprintf(stderr,"nsfix: got multiple matches for some of the fonts\n");
|
---|
| 445 | fprintf(stderr,"nsfix: can't resolve, aborting\n");
|
---|
| 446 | exit(1);
|
---|
| 447 | }
|
---|
| 448 |
|
---|
| 449 | /* now finally write the updated tables */
|
---|
| 450 | for(i=0; i<nzeroes; i++) {
|
---|
| 451 | j=zeroid[i];
|
---|
| 452 | fprintf(stderr, "nsfix: writing table for %s at 0x%lx\n", font[j].nsname,
|
---|
| 453 | (long)zerooff[i]);
|
---|
| 454 |
|
---|
| 455 | font[j].metrics.name=nameaddr[i];
|
---|
| 456 | if( lseek(f, zerooff[i], SEEK_SET)<0 ) {
|
---|
| 457 | sprintf(msg,"nsfix: seek %s to 0x%lx",fn, (long)zerooff[i] );
|
---|
| 458 | perror(msg);
|
---|
| 459 | exit(1);
|
---|
| 460 | }
|
---|
| 461 | if( write(f, &font[j].metrics, sizeof font[j].metrics) != sizeof font[j].metrics ) {
|
---|
| 462 | sprintf(msg,"nsfix: write to %s",fn );
|
---|
| 463 | perror(msg);
|
---|
| 464 | exit(1);
|
---|
| 465 | }
|
---|
| 466 | }
|
---|
| 467 |
|
---|
| 468 | close(f);
|
---|
| 469 | }
|
---|