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CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v102/c068/parser.lst
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326
CPM OPERATING SYSTEMS/CPM 68K/1.0X SOURCES/v102/c068/parser.lst
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1File: PARSER.H Page 1
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1 /*
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2 Copyright 1982
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3 Alcyon Corporation
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4 8716 Production Ave.
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5 San Diego, Ca. 92121
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6 */
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7
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8 /*
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9 C68 Parser - include file
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10 */
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11 #include <stdio.h>
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12 #include <klib.h>
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13 #undef putchar
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14 #define putchar xputchar
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15 #undef ferror
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16 #define printf xprintf
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17 #include "icode.h"
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18
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19 /*symbol attribute fields*/
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20 #define SRESWORD 001 /*is symbol a reserved word?*/
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21 #define SGLOBAL 002 /*is symbol global?*/
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22 #define STYPEDEF 004 /*typedef declaration?*/
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23 #define SDEFINED 010 /*symbol defined?*/
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24
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25 /*reserved words*/
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26 #define R_AUTO 1
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27 #define R_BREAK 2
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28 #define R_CASE 3
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29 #define R_CHAR 4
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30 #define R_CONTINUE 5
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31 #define R_DO 6
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32 #define R_DEFAULT 7
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33 #define R_DOUBLE 8
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34 #define R_GOTO 9
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35 #define R_ELSE 10
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36 #define R_EXTERNAL 11
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37 #define R_FLOAT 12
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38 #define R_FOR 13
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39 #define R_IF 14
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40 #define R_INT 15
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41 #define R_LONG 16
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42 #define R_REGISTER 17
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43 #define R_RETURN 18
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44 #define R_SHORT 19
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45 #define R_SIZEOF 20
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46 #define R_STATIC 21
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47 #define R_STRUCT 22
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48 #define R_SWITCH 23
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49 #define R_TYPEDEF 24
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50 #define R_UNION 25
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51 #define R_UNSIGNED 26
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52 #define R_WHILE 27
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53
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54 /*
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55 * mixed-mode conversions, entries in 2-d array indexed by:
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56 * (int,unsn,long,doub,ptr)
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57 */
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58 #define INT_CHAR 1
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59 #define UNSN_CHAR 1
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1File: PARSER.H Page 2
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60 #define LONG_CHAR 1
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61 #define DOUB_CHAR 1
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62 #define PTR_CHAR 1
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63 #define INT_UNSN 0 /*no conversion is generated*/
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64 #define INT_LONG 2
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65 #define INT_DOUB 3
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66 #define INT_PTR 4
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67 #define UNSN_INT 0 /*no conversion is generated*/
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68 #define UNSN_LONG 6
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69 #define UNSN_DOUB 7
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70 #define UNSN_PTR 8
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71 #define LONG_INT 9
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72 #define LONG_UNSN 10
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73 #define LONG_DOUB 11
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74 #define LONG_PTR 12
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75 #define DOUB_INT 13
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76 #define DOUB_UNSN 14
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77 #define DOUB_LONG 15
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78 #define PTR_INT 16
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79 #define PTR_UNSN 17
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80 #define PTR_LONG 18
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81 #define PTR_PTR 19
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82 #define BADCONV 20
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83
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84 /* miscellaneous constants */
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85 #define OPSSIZE 40 /*operator stack size*/
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86 #define OPDSIZE 80 /*operand stack size*/
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87 #define HSIZE 517 /*hash table size, 3.4 made prime */
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88 #define SYMSIZE 1024 /*size to alloc for symbol structures*/
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89 #define SWSIZE 256 /*max no. of cases in a switch*/
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90 #define DSIZE 1000 /*dimension table size*/
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91 #define BITSPWORD 16 /*bits per word*/
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92 #define AREGLO 010 /*A reg flag*/
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93 #define HICREG 2 /*highest reg # used for code generation*/
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94 #define BITSPCHAR 8 /*bits per char*/
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95 #define CHRSPWORD 2 /*chars per word*/
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96 #define STRSIZE 300 /*max string length*/
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97 #define NFARGS 40 /*max no. of args to function*/
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98 #define NFRSTR 20 /*max no. of forward ref struct proto*/
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99
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100 /*symbol table node*/
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101 struct symbol {
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102 char s_attrib; /* defined, resword, global, typedef */
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103 char s_sc; /* auto, static, external, register */
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104 int s_type; /* 4bits specified, 2 bit fields for ptr... */
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105 int s_dp; /* index into dimension table */
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106 int s_ssp; /* dimension table/function arg table */
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107 int s_offset; /* offset inside of structure */
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108 char s_symbol[SSIZE]; /* symbol identifier, to SSIZE chars */
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109 struct symbol *s_struc; /* if struct, ptr to parent (sys III) */
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110 struct symbol *s_next; /* next symbol table entry */
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111 };
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112
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113 /*expression tree operator node*/
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114 struct tnode {
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115 int t_op;
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116 int t_type;
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117 int t_dp;
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118 int t_ssp;
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1File: PARSER.H Page 3
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119 struct tnode *t_left;
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120 struct tnode *t_right;
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121 };
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122
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123 /*expression tree node for symbol - only keeps location*/
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124 struct symnode {
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125 int t_op;
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126 int t_type; /*data type of symbol*/
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127 int t_dp; /*dimension pointer of symbol*/
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128 int t_ssp; /*structure size index to dtab*/
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129 int t_sc; /*storage class of symbol*/
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130 int t_offset; /*offset of symbol*/
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131 int t_label;
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132 };
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133
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134 /*expressioon tree node for external symbol - need to keep name*/
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135 struct extnode {
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136 int t_op;
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137 int t_type;
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138 int t_dp;
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139 int t_ssp;
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140 int t_sc;
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141 int t_offset;
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142 int t_reg;
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143 int t_symbol[SSIZE]; /*symbol name*/
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144 };
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145
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146 /*expression tree node for integer constant*/
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147 struct conode {
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148 int t_op;
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149 int t_type;
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150 int t_dp;
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151 int t_ssp;
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152 int t_value; /*constant value*/
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153 };
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154
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155 struct lconode {
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156 int t_op;
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157 int t_type;
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158 int t_dp;
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159 int t_ssp;
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160 long t_lvalue; /*constant value*/
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161 };
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162
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163 struct swtch {
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164 int sw_label;
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165 int sw_value;
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166 } swtab[SWSIZE];
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167
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168 /*operator and operand stack used by expr*/
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169 struct ops { /*operator stack*/
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170 int o_op; /*operator*/
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171 int o_pri; /*priority*/
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172 } opstack[OPSSIZE], *opp;
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173
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174 char *opdstack[OPDSIZE]; /*operand stack*/
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175 char **opdp; /*operand stack pointer*/
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176 char *opap; /*ptr to next available loc in exprarea*/
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177 char *exprp; /*place to start building expression*/
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1File: PARSER.H Page 4
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178 int opinfo[]; /*operator info table*/
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179 struct tnode *frp; /*pointer to function return info node*/
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180 int swp; /*current entry in switch table*/
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181 int cswp; /*current low switch table index*/
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182 int nextlabel; /*generates unique label numbers*/
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183 int clabel; /*continue label*/
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184 int blabel; /*break label*/
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185 int rlabel; /*return label*/
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186 int dlabel; /*default label*/
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187 int lineno; /*current line number of input*/
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188 int errcnt; /*count of errors*/
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189 int inclflag; /*in include file, don't incr line #'s*/
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190 int inclline; /*[vlh]line# in incl file for err rpting*/
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191 char inclfile[13]; /*[vlh]include filename for err rpting*/
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192 int equalstop; /*stop lex at '=', used for external init*/
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193 int commastop; /*stop parse @ comma(used for const expr)*/
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194 int colonstop; /*stop parse @ colon(used for case value)*/
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195 int instruct; /*set when in structure declaration*/
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196 int smember; /*set when seen . or ->*/
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197 int infunc; /*set when in function body*/
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198 int tdflag; /*declaration is a typedef proto*/
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199 char *tdp; /*points to typedef prototype*/
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200 int localsize; /*length of local variables*/
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201 int naregs; /*keeps track of ptr registers alloc'd*/
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202 int ndregs; /*keep track of data registers alloc'd*/
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203 int loadreg; /*need to load registers...*/
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204 int boffset; /*current bit offset in structure*/
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205 int eflag; /*[vlh] 3.4 IEEE floats */
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206 int fflag; /*[vlh] 3.4 FFP floats */
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207 int xflag; /*translate int's to long's*/
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208 int wflag; /*[vlh] don't generate warning mesgs*/
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209 int reducep; /*[vlh] if(procid); reduction*/
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210 int peektok; /*peeked at token*/
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211
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212 /*dimension table*/
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213 long dtab[DSIZE]; /* [vlh] 3.4 int => long */
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214 int cdp; /*next entry in dtab to alloc*/
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215
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216 /*lexical analyzer values*/
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217 int cvalue; /*current token value if keyword or CINT*/
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218 int cstrsize; /*current string size*/
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219 long clvalue; /*current token value if long constant*/
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220 struct symbol *csp; /*current token symbol ptr if SYMBOL*/
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221 char cstr[STRSIZE]; /*current token value if CSTRING*/
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222 struct symbol *dsp; /*declarator symbol pointer*/
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223
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224 /* -1 -> not instruct, 0 -> unnamed struct */
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225 struct symbol *strucptr[10]; /*[vlh] ptrs to struc symbols*/
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226
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227 /*function argument table, used to collect function parameters*/
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228 struct farg {
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229 struct symbol *f_sp;
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230 int f_offset;
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231 } fargtab[NFARGS];
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232
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233 /*forward referenced structure prototype names*/
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234 struct symbol *frstab[NFRSTR];
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235 int frstp;
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236
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1File: PARSER.H Page 5
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237 /*output buffers for intermediate code and strings*/
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238 struct io_buf obuf, sbuf, ibuf, *obp;
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239
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240 #define stypedef(sp) (sp->s_attrib&STYPEDEF)
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241 #define walign(add) ((add+1)&(~1))
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242 #define array(type) ((type&SUPTYP)==ARRAY)
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243 #define function(type) ((type&SUPTYP)==FUNCTION)
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244 #define pointer(type) ((type&SUPTYP)==POINTER)
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245 #define notarray(type) ((type&SUPTYP)!=ARRAY)
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246 #define notfunction(type) ((type&SUPTYP)!=FUNCTION)
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247 #define notpointer(type) ((type&SUPTYP)!=POINTER)
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248 #define btype(type) (type&TYPE)
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249 #define suptype(type) (type&SUPTYP)
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250 #define alltype(type) (type&(SUPTYP|TYPE))
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251 #define asgop(op) ((opinfo[op]&OPASSIGN)!=0)
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252 #define relop(op) ((opinfo[op]&OPREL)!=0)
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253 #define lintegral(op) ((opinfo[op]&OPLWORD)!=0)
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254 #define rintegral(op) ((opinfo[op]&OPRWORD)!=0)
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255 #define rasop(op) ((opinfo[op]&OPRAS)!=0)
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256 #define binop(op) ((opinfo[op]&OPBIN)!=0)
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257 #define unaryop(op) ((opinfo[op]&OPBIN)==0)
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258 #define leaf(op) ((opinfo[op]&OPTERM)!=0)
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259 #define lvalop(op) ((opinfo[op]&OPLVAL)!=0)
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260 #define oppriority(op) (opinfo[op]&OPPRI)
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261 #define makeiop(op) (op|(0254<<8))
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262 /* checks for symbol with structure element storage class */
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263 #define isstel(tp) (tp->t_op==SYMBOL && (sesc(tp)))
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264 #define sesc(t) (t->t_sc==STELCL||t->t_sc==UNELCL||t->t_sc==BFIELDCL)
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265 /* peek at next token, if not read token put back, else delete */
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266 /* 1 if matched, 0 otherwise */
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267 #define peek(tok) ( (peektok=gettok()) == tok )
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268
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269 #define outcommon(sym,size) printf("\t.comm _%.8s,%ld\n",sym,size)
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270 #define outgoto(lab) if( lab > 0 ) printf("\tbra L%d\n",lab)
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271 /* change to text segment */
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272 #define outtext() printf("\t.text\n")
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273 /* change segment to bss */
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274 #define outbss() printf("\t.bss\n")
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275 /* output global symbol references */
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276 #define outextdef(sym) printf("\t.globl _%.8s\n",sym)
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277 /* outputs reserved memory [vlh] 3.4 %d => %ld */
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278 #define outresmem(size) printf("\t.ds.b %ld\n",size)
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279 /* output padding for word alignments */
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280 #define outpad() printf("\t.even\n")
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281 /* output long constant to assembler */
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282 #define outlcon(val) printf("\t.dc.l %d\n",val)
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283 /* output label constant */
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284 #define outclab(lab) printf("\t.dc.l L%d\n",lab)
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285 /* output a label */
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286 #define outlab(lab) printf("\tL%d:",lab)
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287 /* output function label */
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288 #define outflab(sym) printf("\t_%.8s:\n\t~~%.8s:\n",sym,sym)
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289 /* output data label */
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290 #define outdlab(sym) printf("\t_%.8s:\n",sym)
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291
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292 /*functions returning pointers*/
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293 char *expr();
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294 char *talloc();
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295 char *tnalloc();
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1File: PARSER.H Page 6
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296 char *enalloc();
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297 char *snalloc();
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298 char *cnalloc();
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299 char *lcnalloc();
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300 char *fpcnalloc();
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301 char *popopd();
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302 char *cvopgen();
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303 char *arrayref();
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304 char *funcref();
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305 char *install();
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306 char *lookup();
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307 char *balpar();
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308 char *sbrk();
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309
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310 long initlist();
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311 long dsize();
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312 long psize();
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313 long dodecl();
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314 long dlist();
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315 long getdec();
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316 long gethex();
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317 long getoct();
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318 long getfp();
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319 long toieee();
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320 long toffp();
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