81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#ifdef __linux__
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#include <bsd/stdlib.h>
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#endif
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#include "input.h"
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char *get_input(const char *path) {
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FILE *fp = NULL;
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fp = fopen(path, "r");
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if (fp == NULL) {
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printf("Failed to open %s. Exiting.\n", path);
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exit(1);
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}
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fseek(fp, 0, SEEK_END);
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size_t fsz = ftell(fp);
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rewind(fp);
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char* buf = NULL;
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buf = malloc(fsz + 1);
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if (buf == NULL) {
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printf("Failed to malloc buf. Exiting.\n");
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exit(1);
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}
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fread(buf, 1, fsz, fp);
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buf[fsz] = '\0';
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fclose(fp);
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return buf;
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}
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char **get_lines(const char *path, size_t *lsz) {
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char **lines = NULL;
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char *delim = "\n";
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char *s = get_input(path), *t = strtok(s, delim);
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size_t n = 0;
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while (t != NULL) {
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lines = realloc(lines, sizeof(char *) * ++n);
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if (lines == NULL) {
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printf("Failed to realloc lines buffer. Exiting.\n");
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exit(1);
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}
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lines[n - 1] = t;
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t = strtok(NULL, delim);
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}
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*lsz = n;
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return lines;
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}
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int *get_ints(const char *path, size_t *sz) {
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char **lines = get_lines(path, sz);
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int *i = malloc(sizeof(int) * *sz);
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for (size_t idx = 0; idx < *sz; idx++) {
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int n;
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const char *errstr;
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n = strtonum(lines[idx], INT_MIN, INT_MAX, &errstr);
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if (errstr) {
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printf("Failed to convert %s to int. Exiting.\n", lines[idx]);
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exit(1);
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}
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i[idx] = n;
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}
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del_lines(lines);
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return i;
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}
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void del_lines(char **lines) {
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free(lines[0]);
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free(lines);
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}
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