/usr/share/ick-0.29/syslibc.c is in intercal 29:0.29-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | /*
* The INTERCAL system library, optimised version in C.
*
* This is provided as an example of how to write a C program
* that links to INTERCAL programs, to demonstrate the external
* call code.
*
* Written originally by Alex Smith, and released to the public
* domain. This library comes with NO WARRANTY.
*/
#include <ick_ec.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
/* This identifier name breaches the namespace rule that ick_ must be
avoided, but this library has to work with both other people's
INTERCAL programs and other people's C programs. So I've chosen an
identifier name which breaches the rules (so that it doesn't clash
with other people's C programs) but isn't used anywhere in the
compiler, and so doesn't clash with it either.
*/
static void errout(int routine, const char* msg)
{
fprintf(stderr,"C-INTERCAL system library: (%d): %s\n", routine, msg);
exit(EXIT_FAILURE);
}
ICK_EC_FUNC_START(ick_my_custom_syslib)
{
register uint16_t os1, os2;
register uint32_t ts1, ts2;
static int seededyet = 0;
ick_linelabel(1000);
os1=ick_getonespot(1);
os2=ick_getonespot(2);
if(0xffff-os1<os2) errout(1000, "onespot overflow");
ick_setonespot(3,os1+os2);
ick_resume(1);
return; /* so the compiler knows the next line can't be reached from here */
ick_linelabel(1009);
os1=ick_getonespot(1);
os2=ick_getonespot(2);
ick_setonespot(4,1);
if(0xffff-os1<os2) ick_setonespot(4,2);
ick_setonespot(3,os1+os2);
ick_resume(1);
return;
ick_linelabel(1010);
ick_setonespot(3,ick_getonespot(1)-ick_getonespot(2));
ick_resume(1);
return;
ick_linelabel(1020);
ick_setonespot(1,ick_getonespot(1)+1U);
ick_resume(1);
return;
ick_linelabel(1030);
os1=ick_getonespot(1);
os2=ick_getonespot(2);
if(os1&&0xffff/os1<os2) errout(1030, "onespot overflow");
ick_setonespot(3,os1*os2);
ick_resume(1);
return;
ick_linelabel(1039);
os1=ick_getonespot(1);
os2=ick_getonespot(2);
ick_setonespot(4,1);
if(os1&&0xffff/os1<os2) ick_setonespot(4,2);
ick_setonespot(3,os1*os2);
ick_resume(1);
return;
ick_linelabel(1040);
os2=ick_getonespot(2);
if(!os2)
ick_setonespot(3,0);
else
ick_setonespot(3,ick_getonespot(1)/os2);
ick_resume(1);
return;
ick_linelabel(1050);
os1=ick_getonespot(1);
ts1=ick_gettwospot(1);
if(!os1)
ts1 = 0;
else
ts1/=os1;
if(ts1>0xffffLU) errout(1050, "onespot overflow");
ick_setonespot(2,(uint16_t)ts1);
ick_resume(1);
return;
ick_linelabel(1500);
ts1=ick_gettwospot(1);
ts2=ick_gettwospot(2);
if(0xffffffffLU-ts1<ts2) errout(1500, "twospot overflow");
ick_settwospot(3,ts1+ts2);
ick_resume(1);
return;
ick_linelabel(1509);
ts1=ick_gettwospot(1);
ts2=ick_gettwospot(2);
ick_setonespot(4,1);
if(0xffffffffLU-ts1<ts2) ick_setonespot(4,2);
ick_settwospot(3,ts1+ts2);
ick_resume(1);
return;
ick_linelabel(1510);
ick_settwospot(3,ick_gettwospot(1)-ick_gettwospot(2));
ick_resume(1);
return;
ick_linelabel(1520);
ick_settwospot(1,(((uint32_t)ick_getonespot(1))<<16)+ick_getonespot(2));
ick_resume(1);
return;
ick_linelabel(1530);
ick_settwospot(1,ick_getonespot(1)*ick_getonespot(2));
ick_resume(1);
return;
ick_linelabel(1540);
ts1=ick_gettwospot(1);
ts2=ick_gettwospot(2);
if(ts1&&0xfffffffflu/ts1<ts2) errout(1540, "twospot overflow");
ick_settwospot(3,ts1*ts2);
ick_resume(1);
return;
ick_linelabel(1549);
ts1=ick_gettwospot(1);
ts2=ick_gettwospot(2);
ick_setonespot(4,1);
if(ts1&&0xfffffffflu/ts1<ts2) ick_setonespot(4,2);
ick_settwospot(3,ts1*ts2);
ick_resume(1);
return;
ick_linelabel(1550);
ts2=ick_gettwospot(2);
if(!ts2)
ick_settwospot(3,0);
else
ick_settwospot(3,ick_gettwospot(1)/ts2);
ick_resume(1);
return;
ick_linelabel(1900);
if(!seededyet) srand(time(0));
seededyet=1;
ick_setonespot(1,rand()/(1+RAND_MAX/65536));
ick_resume(1);
return;
ick_linelabel(1910);
/* Here, we use the same algorithm as the original INTERCAL,
so as to produce similarly-distributed results.
If we add together 12 uniform random variables in the range #0 to
(.1 / 12), then the resulting random variable has a mean of (.1 /
2), and a variance of 12 times the original variance, which is
(((.1 * .1) / 144) / 12), giving a final variance of ((.1 * .1) /
144) and a final standard deviation of .1 / 12. */
if(!seededyet) srand(time(0));
seededyet=1;
os1=ick_getonespot(1);
os2 =rand()/(RAND_MAX/((os1 )/12));
os2+=rand()/(RAND_MAX/((os1+ 1)/12));
os2+=rand()/(RAND_MAX/((os1+ 2)/12));
os2+=rand()/(RAND_MAX/((os1+ 3)/12));
os2+=rand()/(RAND_MAX/((os1+ 4)/12));
os2+=rand()/(RAND_MAX/((os1+ 5)/12));
os2+=rand()/(RAND_MAX/((os1+ 6)/12));
os2+=rand()/(RAND_MAX/((os1+ 7)/12));
os2+=rand()/(RAND_MAX/((os1+ 8)/12));
os2+=rand()/(RAND_MAX/((os1+ 9)/12));
os2+=rand()/(RAND_MAX/((os1+10)/12));
os2+=rand()/(RAND_MAX/((os1+11)/12));
ick_setonespot(2,os2);
ick_resume(1);
return;
/* Several existing INTERCAL programs rely on the routine (1001),
which is undocumented and therefore shouldn't be used. So as not
to break those programs, here it is: */
ick_linelabel(1001);
ick_resume(ick_getonespot(5));
return;
}
ICK_EC_FUNC_END
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