87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
/*
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* @Author: 1ridic
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* @Date: 2022-09-18 14:14:05
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* @Last Modified by: 1ridic
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* @Last Modified time: 2022-09-18 14:14:05
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*/
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#include "line.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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char *readLine(void) {
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int bufsize = LINE_BUF_SIZE;
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int position = 0;
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char *buffer = malloc(sizeof(char) * bufsize);
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char c;
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if (!buffer) {
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fprintf(stderr, "dish: allocation error\n");
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exit(EXIT_FAILURE);
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}
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while (1) {
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// read a character
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c = getchar();
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// repleace EOF with a null character and return
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if (c == EOF || c == '\n') {
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buffer[position] = '\0';
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return buffer;
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} else {
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buffer[position] = c;
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}
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position++;
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/* if the buffer is full, reallocate */
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if (position >= bufsize) {
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bufsize += LINE_BUF_SIZE;
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buffer = realloc(buffer, bufsize);
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if (!buffer) {
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fprintf(stderr, "dish: allocation error\n");
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exit(EXIT_FAILURE);
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}
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}
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}
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}
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char **splitLine(char *line) {
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int bufsize = LINE_BUF_SIZE, position = 0;
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char **tokens = malloc(bufsize * sizeof(char *));
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char *token;
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if (!tokens) {
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fprintf(stderr, "dish: allocation error");
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exit(EXIT_FAILURE);
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}
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/* get sub string
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*" \t\r\n\a" is a set of delimiters,
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* which stands for space, tab, carriage, newline, and alert.
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*/
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token = strtok(line, " \t\r\n\a");
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while (token != NULL) {
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tokens[position] = token;
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#ifdef DEBUG
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fprintf(stdout, "debug: tokens[%d] = %s\n", position, tokens[position]);
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#endif
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position++;
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/* if the buffer is full, reallocate */
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if (position >= bufsize) {
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bufsize += LINE_BUF_SIZE;
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tokens = realloc(tokens, bufsize);
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if (!tokens) {
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fprintf(stderr, "dish: allocation error\n");
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exit(EXIT_FAILURE);
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}
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}
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token = strtok(NULL, " \t\r\n\a");
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}
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/* set the last element to NULL */
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tokens[position] = NULL;
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return tokens;
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}
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