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feat(userspace/libc): implement getdelim and getline functions

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Signed-off-by: EnderIce2 <enderice2@protonmail.com>
This commit is contained in:
EnderIce2 2025-02-20 02:20:26 +02:00
parent 8d08ab933a
commit 42f26787fb
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GPG Key ID: 2EE20AF089811A5A
2 changed files with 60 additions and 4 deletions
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4
Userspace/libc/include/stdio.h
View File

@ -119,8 +119,8 @@ extern "C"
int getchar(void);
int getc_unlocked(FILE *);
int getchar_unlocked(void);
ssize_t getdelim(char **restrict, size_t *restrict, int, FILE *restrict);
ssize_t getline(char **restrict, size_t *restrict, FILE *restrict);
ssize_t getdelim(char **restrict lineptr, size_t *restrict n, int delimiter, FILE *restrict stream);
ssize_t getline(char **restrict lineptr, size_t *restrict n, FILE *restrict stream);
FILE *open_memstream(char **, size_t *);
int pclose(FILE *);
void perror(const char *s);

60
Userspace/libc/src/std/stdio.c
View File

@ -359,8 +359,64 @@ export int getchar(void)
export int getc_unlocked(FILE *);
export int getchar_unlocked(void);
export ssize_t getdelim(char **restrict, size_t *restrict, int, FILE *restrict);
export ssize_t getline(char **restrict, size_t *restrict, FILE *restrict);
export ssize_t getdelim(char **restrict lineptr, size_t *restrict n, int delimiter, FILE *restrict stream)
{
if (!lineptr || !n || !stream)
{
errno = EINVAL;
return -1;
}
if (!*lineptr)
{
*n = 128;
*lineptr = malloc(*n);
if (!*lineptr)
{
errno = ENOMEM;
return -1;
}
}
size_t pos = 0;
int c;
while ((c = fgetc(stream)) != EOF)
{
if (pos + 1 >= *n)
{
*n *= 2;
char *new_lineptr = realloc(*lineptr, *n);
if (!new_lineptr)
{
errno = ENOMEM;
return -1;
}
*lineptr = new_lineptr;
}
(*lineptr)[pos++] = (char)c;
if (c == delimiter)
break;
}
if (ferror(stream))
return -1;
if (pos == 0 && feof(stream))
return -1;
(*lineptr)[pos] = '\0';
return pos;
}
export ssize_t getline(char **restrict lineptr, size_t *restrict n, FILE *restrict stream)
{
return getdelim(lineptr, n, '\n', stream);
}
export FILE *open_memstream(char **, size_t *);
export int pclose(FILE *);