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assembler.c
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assembler.c
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#include "instructionset.h"
char *read_file(char *filename) {
FILE *file = fopen(filename, "r");
if (!file) {
printf("error: failed to read file `%s`\n", filename);
return NULL;
}
char *source;
if (fseek(file, 0, SEEK_END)) {
printf("error: could not read file `%s`\n", filename);
return NULL;
}
long file_size = ftell(file);
if (file_size == -1) {
printf("error: invalid file size\n");
return NULL;
}
source = malloc(sizeof(*char) * (file_size));
if (fseek(file, 0, SEEK_SET)) {
printf("error: could not read file `%s`\n", filename);
free(source);
return NULL;
}
size_t file_len = fread(source, sizeof(char), file_size, file);
if (!file_length) {
printf("error: could not read file `%s`\n", filename);
free(source);
return NULL;
}
source[file_size] = '\0';
fclose(file);
return source;
}
int main(int argc, char** argv) {
if (argc <= 1) {
printf("error: no input files\n");
return -1;
}
char *filename = argv[1];
char *file_contents = read_file(filename);
}