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) {
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424 | sprintf(msg,"nsfix: read %s",fn);
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425 | perror(msg);
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426 | exit(1);
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427 | }
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428 | fprintf(stderr,"---\n");
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429 |
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430 | /* make sure that all the fonts got one match */
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431 | k=0; /* flag: have non-matched fonts */ n=0; /* flag: have ambiguities */
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432 | for(i=0; i<nfonts; i++)
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433 | if(matched[i]==0)
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434 | k=1;
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435 | else if(matched[i]>1)
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436 | n=1;
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437 |
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438 | if(k) {
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439 | fprintf(stderr,"nsfix: can't find match for some of the fonts\n");
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440 | fprintf(stderr,"nsfix: maybe wrong byte order, aborting\n");
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441 | exit(1);
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442 | }
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443 | if(n) {
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444 | fprintf(stderr,"nsfix: got multiple matches for some of the fonts\n");
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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 | }
|
---|