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Side by Side Diff: fusl/src/stdio/open_memstream.c

Issue 1714623002: [fusl] clang-format fusl (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: headers too Created 4 years, 10 months ago
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1 #include "stdio_impl.h" 1 #include "stdio_impl.h"
2 #include <errno.h> 2 #include <errno.h>
3 #include <limits.h> 3 #include <limits.h>
4 #include <string.h> 4 #include <string.h>
5 5
6 struct cookie { 6 struct cookie {
7 » char **bufp; 7 char** bufp;
8 » size_t *sizep; 8 size_t* sizep;
9 » size_t pos; 9 size_t pos;
10 » char *buf; 10 char* buf;
11 » size_t len; 11 size_t len;
12 » size_t space; 12 size_t space;
13 }; 13 };
14 14
15 static off_t ms_seek(FILE *f, off_t off, int whence) 15 static off_t ms_seek(FILE* f, off_t off, int whence) {
16 { 16 ssize_t base;
17 » ssize_t base; 17 struct cookie* c = f->cookie;
18 » struct cookie *c = f->cookie; 18 if (whence > 2U) {
19 » if (whence>2U) { 19 fail:
20 fail: 20 errno = EINVAL;
21 » » errno = EINVAL; 21 return -1;
22 » » return -1; 22 }
23 » } 23 base = (size_t[3]){0, c->pos, c->len}[whence];
24 » base = (size_t [3]){0, c->pos, c->len}[whence]; 24 if (off < -base || off > SSIZE_MAX - base)
25 » if (off < -base || off > SSIZE_MAX-base) goto fail; 25 goto fail;
26 » return c->pos = base+off; 26 return c->pos = base + off;
27 } 27 }
28 28
29 static size_t ms_write(FILE *f, const unsigned char *buf, size_t len) 29 static size_t ms_write(FILE* f, const unsigned char* buf, size_t len) {
30 { 30 struct cookie* c = f->cookie;
31 » struct cookie *c = f->cookie; 31 size_t len2 = f->wpos - f->wbase;
32 » size_t len2 = f->wpos - f->wbase; 32 char* newbuf;
33 » char *newbuf; 33 if (len2) {
34 » if (len2) { 34 f->wpos = f->wbase;
35 » » f->wpos = f->wbase; 35 if (ms_write(f, f->wbase, len2) < len2)
36 » » if (ms_write(f, f->wbase, len2) < len2) return 0; 36 return 0;
37 » } 37 }
38 » if (len + c->pos >= c->space) { 38 if (len + c->pos >= c->space) {
39 » » len2 = 2*c->space+1 | c->pos+len+1; 39 len2 = 2 * c->space + 1 | c->pos + len + 1;
40 » » newbuf = realloc(c->buf, len2); 40 newbuf = realloc(c->buf, len2);
41 » » if (!newbuf) return 0; 41 if (!newbuf)
42 » » *c->bufp = c->buf = newbuf; 42 return 0;
43 » » memset(c->buf + c->space, 0, len2 - c->space); 43 *c->bufp = c->buf = newbuf;
44 » » c->space = len2; 44 memset(c->buf + c->space, 0, len2 - c->space);
45 » } 45 c->space = len2;
46 » memcpy(c->buf+c->pos, buf, len); 46 }
47 » c->pos += len; 47 memcpy(c->buf + c->pos, buf, len);
48 » if (c->pos >= c->len) c->len = c->pos; 48 c->pos += len;
49 » *c->sizep = c->pos; 49 if (c->pos >= c->len)
50 » return len; 50 c->len = c->pos;
51 *c->sizep = c->pos;
52 return len;
51 } 53 }
52 54
53 static int ms_close(FILE *f) 55 static int ms_close(FILE* f) {
54 { 56 return 0;
55 » return 0;
56 } 57 }
57 58
58 FILE *open_memstream(char **bufp, size_t *sizep) 59 FILE* open_memstream(char** bufp, size_t* sizep) {
59 { 60 FILE* f;
60 » FILE *f; 61 struct cookie* c;
61 » struct cookie *c; 62 char* buf;
62 » char *buf;
63 63
64 » if (!(f=malloc(sizeof *f + sizeof *c + BUFSIZ))) return 0; 64 if (!(f = malloc(sizeof *f + sizeof *c + BUFSIZ)))
65 » if (!(buf=malloc(sizeof *buf))) { 65 return 0;
66 » » free(f); 66 if (!(buf = malloc(sizeof *buf))) {
67 » » return 0; 67 free(f);
68 » } 68 return 0;
69 » memset(f, 0, sizeof *f + sizeof *c); 69 }
70 » f->cookie = c = (void *)(f+1); 70 memset(f, 0, sizeof *f + sizeof *c);
71 f->cookie = c = (void*)(f + 1);
71 72
72 » c->bufp = bufp; 73 c->bufp = bufp;
73 » c->sizep = sizep; 74 c->sizep = sizep;
74 » c->pos = c->len = c->space = *sizep = 0; 75 c->pos = c->len = c->space = *sizep = 0;
75 » c->buf = *bufp = buf; 76 c->buf = *bufp = buf;
76 » *buf = 0; 77 *buf = 0;
77 78
78 » f->flags = F_NORD; 79 f->flags = F_NORD;
79 » f->fd = -1; 80 f->fd = -1;
80 » f->buf = (void *)(c+1); 81 f->buf = (void*)(c + 1);
81 » f->buf_size = BUFSIZ; 82 f->buf_size = BUFSIZ;
82 » f->lbf = EOF; 83 f->lbf = EOF;
83 » f->write = ms_write; 84 f->write = ms_write;
84 » f->seek = ms_seek; 85 f->seek = ms_seek;
85 » f->close = ms_close; 86 f->close = ms_close;
86 87
87 » if (!libc.threaded) f->lock = -1; 88 if (!libc.threaded)
89 f->lock = -1;
88 90
89 » return __ofl_add(f); 91 return __ofl_add(f);
90 } 92 }
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