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Make major improvements to stdio

Browse source 
Buffering now has optimal performance, bugs have been fixed, and some
missing apis have been introduced. This implementation is also now more
production worthy since it's less brittle now in terms of system errors.
That's going to help redbean since lua i/o is all based on stdio.

See #97
This commit is contained in:
Justine Tunney 2021-03-26 22:31:41 -07:00
parent 09bcfa23d5
commit da36e7e256
69 changed files with 1595 additions and 735 deletions
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43
libc/stdio/stdio.h
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@ -13,19 +13,17 @@ COSMOPOLITAN_C_START_
╚────────────────────────────────────────────────────────────────────────────│*/
typedef struct FILE {
uint8_t bufmode; /* 0x00 _IOFBF, etc. (ignored if fd=-1) */
bool noclose; /* 0x01 for fake dup() */
uint32_t iomode; /* 0x04 O_RDONLY, etc. (ignored if fd=-1) */
int32_t state; /* 0x08 0=OK, -1=EOF, >0=errno */
int fd; /* 0x0c ≥0=fd, -1=closed|buffer */
uint32_t beg; /* 0x10 */
uint32_t end; /* 0x14 */
uint8_t *buf; /* 0x18 */
uint32_t size; /* 0x20 */
uint32_t nofree; /* 0x24 */
int (*reader)(struct FILE *); /* 0x28 */
int (*writer)(struct FILE *); /* 0x30 */
int pid; /* 0x34 */
uint8_t bufmode; /* 0x00 _IOFBF, etc. (ignored if fd=-1) */
bool noclose; /* 0x01 for fake dup() */
uint32_t iomode; /* 0x04 O_RDONLY, etc. (ignored if fd=-1) */
int32_t state; /* 0x08 0=OK, -1=EOF, >0=errno */
int fd; /* 0x0c ≥0=fd, -1=closed|buffer */
uint32_t beg; /* 0x10 */
uint32_t end; /* 0x14 */
char *buf; /* 0x18 */
uint32_t size; /* 0x20 */
uint32_t nofree; /* 0x24 */
int pid; /* 0x28 */
} FILE;
extern FILE *stdin;
@ -46,10 +44,13 @@ int fputs(const char *, FILE *) paramsnonnull();
int fputws(const wchar_t *, FILE *) paramsnonnull();
char *fgets(char *, int, FILE *) paramsnonnull();
wchar_t *fgetws(wchar_t *, int, FILE *) paramsnonnull();
wint_t putwc(wchar_t, FILE *) paramsnonnull();
wint_t fputwc(wchar_t, FILE *) paramsnonnull();
wint_t putwchar(wchar_t);
wint_t getwchar(void);
wint_t getwc(FILE *) paramsnonnull();
wint_t fgetwc(FILE *) paramsnonnull();
wint_t ungetwc(wint_t, FILE *) paramsnonnull();
int getchar(void);
int putchar(int);
int puts(const char *) paramsnonnull();
@ -59,12 +60,14 @@ FILE *fopen(const char *, const char *) paramsnonnull() nodiscard;
FILE *fdopen(int, const char *) paramsnonnull() nodiscard;
FILE *fmemopen(void *, size_t, const char *) paramsnonnull((3)) nodiscard;
FILE *freopen(const char *, const char *, FILE *) paramsnonnull((2, 3));
size_t fread(void *, size_t, size_t, FILE *) paramsnonnull();
size_t fwrite(const void *, size_t, size_t, FILE *) paramsnonnull();
size_t fread(void *, size_t, size_t, FILE *) paramsnonnull((4));
size_t fwrite(const void *, size_t, size_t, FILE *) paramsnonnull((4));
int fclose(FILE *);
int fclose_s(FILE **) paramsnonnull();
long fseek(FILE *, long, int) paramsnonnull();
int fseek(FILE *, long, int) paramsnonnull();
long ftell(FILE *) paramsnonnull();
int fseeko(FILE *, int64_t, int) paramsnonnull();
int64_t ftello(FILE *) paramsnonnull();
void rewind(FILE *) paramsnonnull();
int fopenflags(const char *) paramsnonnull();
void setbuf(FILE *, char *);
@ -77,8 +80,6 @@ typedef uint64_t fpos_t;
compatfn char *gets(char *) paramsnonnull();
compatfn int fgetpos(FILE *, fpos_t *) paramsnonnull();
compatfn int fsetpos(FILE *, const fpos_t *) paramsnonnull();
compatfn int64_t fseeko(FILE *, long, int) paramsnonnull();
compatfn int64_t ftello(FILE *) paramsnonnull();
int system(const char *);
int systemexec(const char *);
@ -102,8 +103,10 @@ int vfscanf(FILE *, const char *, va_list);
│ cosmopolitan § standard i/o » optimizations ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
#define getc(f) fgetc(f)
#define putc(c, f) fputc(c, f)
#define getc(f) fgetc(f)
#define getwc(f) fgetwc(f)
#define putc(c, f) fputc(c, f)
#define putwc(c, f) fputwc(c, f)
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
#define printf(FMT, ...) (printf)(PFLINK(FMT), ##__VA_ARGS__)