70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
#include "toy.h"
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//gibt Anzahl der erfolgreich gelesenen Maschinenworte zurück(-1 im Fehlerfall).
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int initialise_ram(uint16_t *ram, int argc, char **argv )
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{
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//open Input Stream
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FILE *fp;
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int j=0;
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char tempS[CPU_WORD_SIZE+1]; //+1 for "\0"
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for(int i=0;i<RAM_SIZE;i++) ram[i]=0;
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if(argc<2)
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{
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fprintf(stderr,"%s","no \".toy\" input file!\n");
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return -1;
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}
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if(argc >2)
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{
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fprintf(stderr,"%s","too many input files!\n");
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return -1;
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}
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if(!(fp=fopen(argv[1],"rb")))
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{
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fprintf(stderr,"%s","open input stream fault !\n");
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return -1;
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}
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// initialise Toy-RAM
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do
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{
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for(int i=0;i<=CPU_WORD_SIZE;i++)
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{
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tempS[i]=fgetc(fp);
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if(tempS[0]==EOF) break;
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if(tempS[i]!='1' && tempS[i]!='0' && i<CPU_WORD_SIZE)
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{
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fprintf(stderr,"%s","input file corrupted\n");
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return -1;
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}
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}
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tempS[CPU_WORD_SIZE]='\0';
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ram[j]=strtoul(tempS,NULL,2);
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j++;
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}while(tempS[0]!=EOF);
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fclose(fp);
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return j-1;
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}
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uint8_t get_opcode(uint16_t instruction)
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{
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uint8_t opcode;
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opcode = instruction>>12;
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return opcode;
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}
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int find_data(uint16_t instruction)
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{
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int instr;
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if(instruction > 32767) instr = -1;
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else instr=instruction & 4095;
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return instr;
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}
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