The LATEX 2" Sources Johannes Braams David Carlisle Alan Jeffrey Leslie Lamport Frank Mittelbach Chris Rowley Rainer Sch¨opf 2005/12/01 Contents a ltdirchk.dtx 1 1 LATEX System Dependent Initialisations 1 2 Initialisation 2 2.1 INITEX . 3 2.2 Some bits of 2e . 3 3 texsys.cfg 4 3.1 texsys.cfg . 5 3.2 UNIX (web2c) . 6 3.3 UNIX (other) . 6 3.4 MSDOS (emtex) . 6 3.5 MSDOS (other) . 6 3.6 VMS (DECUS TEX, PD VMS 3.6) . 7 3.7 VMS (???) . 7 3.8 MACINTOSH (OzTeX 1.6) . 7 3.9 MACINTOSH (other) . 7 3.10 FAKE EXAMPLE . 7 4 Setting \@currdir 8 5 Setting \input@path 10 6 Filename Parsing 11 i 7 TEX Versions 12 8 ltxcheck.tex 13 b ltplain.dtx 14 9 Plain TEX 14 c ltvers.dtx 27 10 Version Identification 27 d ltdefns.dtx 29 11 Definitions 29 11.1 Initex initialisations . 29 11.2 Saved versions of TEX primitives . 29 11.3 Command definitions . 30 11.4 Robust commands and protect . 38 11.5 Internal defining commands . 41 11.6 Commands for Autoloading . 43 e ltalloc.dtx 45 12 Counters 45 f ltcntrl.dtx 47 13 Program control structure 47 g lterror.dtx 51 14 Error handling 51 14.1 General commands . 51 14.2 Specific errors . 57 h ltpar.dtx 61 15 Paragraphs 61 15.1 Implementation . 61 ii i ltspace.dtx 63 16 Spacing 63 16.1 User Commands . 63 16.2 Chris' comments . 63 16.3 Some immediate actions . 66 16.4 The code . 66 16.5 Vertical spacing . 71 16.6 Horizontal space (and breaks) . 73 j ltlogos.dtx 76 17 Logos 76 k ltfiles.dtx 77 18 File Handling 77 18.1 Safe Input Macros . 84 18.2 Listing files . 86 l ltoutenc.dtx 87 19 Font encodings 87 19.1 Removing encoding-specific commands . 90 19.2 The order of declarations . 90 19.3 Docstrip modules . 90 19.4 Definitions for the kernel . 91 19.4.1 Declaration commands . 91 19.4.2 Hyphenation . 98 19.4.3 Miscellania . 99 19.4.4 Default encodings . 99 19.4.5 Math material . 101 19.5 Definitions for the OT1 encoding . 102 19.6 Definitions for the T1 encoding . 104 19.7 Definitions for the OMS encoding . 109 19.8 Definitions for the OML encoding . 110 19.9 Definitions for the OT4 encoding . 110 19.10Definitions for the TS1 encoding . 112 20 Package files 117 20.1 The fontenc package . 117 20.2 The textcomp package . 119 20.2.1 Supporting oldstyle digits . 127 20.2.2 Subset encoding defaults . 127 iii m ltcounts.dtx 130 21 Counters and Lengths 130 21.1 Environment Counter Macros . 130 n ltlength.dtx 134 22 Lengths 134 o ltfssbas.dtx 135 23 Autoloading parts of NFSS 135 24 Preliminary macros 135 25 Macros for setting up the tables 136 26 Selecting a new font 142 26.1 Macros for the user . 142 26.2 Macros for loading fonts . 145 27 Assigning math fonts to versions 151 p ltfsstrc.dtx 157 28 Introduction 157 29 A driver for this document 157 30 The Implementation 158 31 Handling Options 158 32 Macros common to fam.tex and tracefnt.sty 160 32.1 General font loading . 160 32.2 Math fonts setup . 165 32.2.1 Outline of algorithm for math font sizes . 165 32.2.2 Code for math font size setting . 166 32.2.3 Other code for math . 167 33 Scaled font extraction 169 33.1 Sizefunctions . 178 q ltfsscmp.dtx 182 iv 34 Compatibility code for NFSS release 1 182 r ltfssdcl.dtx 187 35 Interface Commands 187 s ltfssini.dtx 210 36 NFSS Initialisation 210 36.1 Providing math versions . 210 36.2 Miscellaneous . 212 t fontdef.dtx 216 37 Introduction 216 38 Customization 216 39 The docstrip modules 217 40 A driver for this document 217 41 The fonttext.ltx file 218 41.1 Encodings . 218 41.2 Defaults . 220 42 The fontmath.ltx file 220 42.1 The font encodings used . 221 42.1.1 Symbolfont and Alphabet declarations . 221 42.2 Math font sizes . 222 42.3 The math symbol assignments . 222 42.3.1 The letters . 222 42.3.2 The digits . 223 42.3.3 Punctuation, brace, etc. keys . 224 42.3.4 Delimitercodes for characters . 224 42.4 Symbols accessed via control sequences . 225 42.4.1 Greek letters . 225 42.4.2 Ordinary symbols . 226 42.4.3 Large Operators . 226 42.4.4 Binary symbols . 227 42.4.5 Relations . 228 42.4.6 Arrows . 229 42.4.7 Punctuation symbols . 230 42.4.8 Math accents . 230 v 42.4.9 Radicals . 231 42.4.10 Over and under something, etc . 231 42.4.11 Delimiters . 231 42.5 Math versions of text commands . 233 42.6 Other special functions and parameters . 233 42.6.1 Biggggg . 233 42.6.2 The log-like functions . 233 42.6.3 Parameters . 233 43 Default cfg files 234 u preload.dtx 235 44 Overview 235 45 Customization 235 46 Module switches for the docstrip program 236 47 A driver for this document 236 48 The code 236 v ltfntcmd.dtx 239 49 Introduction 239 50 The implementation 241 51 Initialization 247 w ltpageno.dtx 248 52 Page Numbering 248 x ltxref.dtx 249 53 Cross Referencing 249 53.1 Cross Referencing . 249 53.2 An extension of counter referencing . 251 y ltmiscen.dtx 253 vi 54 Miscellaneous Environments 253 54.1 Environments . 253 54.2 Center, Flushright, Flushleft . 257 54.3 Verbatim . 259 z ltmath.dtx 262 55 Math setup 262 55.1 Math commands based on plain TEX . 262 55.1.1 The log-like functions . 262 55.1.2 Biggggg . 263 55.1.3 The UNSORTED Rest . 263 55.2 Math Environments . 267 55.3 External options to the standard document classes . 270 55.3.1 Left equation numbering . 270 55.3.2 Flush left equations . 270 A ltlists.dtx 273 56 List, and related environments 273 56.1 List and Trivlist . 274 56.2 Vertical Spacing (skips) . 275 56.3 Penalties . 275 56.4 Horizontal Spacing (dimens) . 275 56.5 Default Values . 276 56.6 Itemize and Enumerate . 286 B ltboxes.dtx 289 57 LATEX Box commands 289 57.1 Some low-level constructs . 299 C lttab.dtx 301 58 Tabbing, Tabular and Array Environments 301 58.1 tabbing . 301 58.2 array and tabular environments . 310 D ltpictur.dtx 325 59 Picture Mode 325 59.1 Curves . 345 vii E ltthm.dtx 349 60 Theorem Environments 349 F ltsect.dtx 353 61 Sectioning Commands 353 61.1 The Title . ..