74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* io.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: apago <apago@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/04/04 18:23:57 by apago #+# #+# */
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/* Updated: 2023/04/04 18:24:50 by apago ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "parsing.h"
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void copy_bytes(char *dst, char *src, size_t bytes)
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{
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size_t i;
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i = 0;
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while (i < bytes)
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{
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dst[i] = src[i];
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i++;
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}
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}
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int push_bytes(size_t n_read, char **res, size_t *offset, size_t *size)
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{
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char *new_res;
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if (n_read <= 0)
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return (n_read);
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*offset += n_read;
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if (*offset == *size)
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{
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new_res = malloc(*size * 2);
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if (!new_res)
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return (-1);
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copy_bytes(new_res, *res, *size);
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free(*res);
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*res = new_res;
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*size *= 2;
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}
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return (n_read);
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}
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char *read_file(int file)
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{
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size_t size;
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size_t offset;
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size_t n_read;
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char *res;
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offset = 0;
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size = 1024;
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res = malloc(size);
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if (!res)
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return (0);
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while (1)
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{
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n_read = read(file, &res[offset], size - offset);
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n_read = push_bytes(n_read, &res, &offset, &size);
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if (!n_read)
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break ;
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if (n_read < 0)
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{
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free(res);
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return (0);
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}
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}
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res[offset] = 0;
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return (res);
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}
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