prosody
e210afc9296a
util-src/ringbuffer.c

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util-src/ringbuffer.c @ 10785:e210afc9296a

mod_carbons: Don't copy messages that should not be copied The return statements were lost in d95e083931d1
author Kim Alvefur <zash@zash.se>
date Mon, 27 Apr 2020 14:43:54 +0200
parent 10480:94cacf9fd0ae
child 10898:c6465fb3c839
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
2 #include <stdlib.h>
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
3 #include <unistd.h>
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
4 #include <string.h>
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
5 #include <stdio.h>
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
6
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
7 #include <lua.h>
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
8 #include <lauxlib.h>
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
9
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
10 typedef struct {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
11 size_t rpos; /* read position */
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
12 size_t wpos; /* write position */
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
13 size_t alen; /* allocated size */
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
14 size_t blen; /* current content size */
7828
b4a08a514ebc util.ringbuffer: Allocate buffer itself as part of userdata (simpler, single allocation, no need for __gc)
Kim Alvefur <zash@zash.se>
parents: 7827
diff changeset
15 char buffer[];
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
16 } ringbuffer;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
17
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
18 static void writechar(ringbuffer *b, char c) {
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
19 b->blen++;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
20 b->buffer[(b->wpos++) % b->alen] = c;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
21 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
22
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
23 /* make sure position counters stay within the allocation */
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
24 static void modpos(ringbuffer *b) {
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
25 b->rpos = b->rpos % b->alen;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
26 b->wpos = b->wpos % b->alen;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
27 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
28
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
29 static int find(ringbuffer *b, const char *s, size_t l) {
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
30 size_t i, j;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
31 int m;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
32
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
33 if(b->rpos == b->wpos) { /* empty */
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
34 return 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
35 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
36
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
37 /* look for a matching first byte */
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
38 for(i = 0; i <= b->blen - l; i++) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
39 if(b->buffer[(b->rpos + i) % b->alen] == *s) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
40 m = 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
41
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
42 /* check if the following byte also match */
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
43 for(j = 1; j < l; j++)
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
44 if(b->buffer[(b->rpos + i + j) % b->alen] != s[j]) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
45 m = 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
46 break;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
47 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
48
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
49 if(m) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
50 return i + l;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
51 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
52 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
53 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
54
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
55 return 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
56 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
57
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
58 /*
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
59 * Find first position of a substring in buffer
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
60 * (buffer, string) -> number
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
61 */
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
62 static int rb_find(lua_State *L) {
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
63 size_t l, m;
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
64 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
65 const char *s = luaL_checklstring(L, 2, &l);
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
66 m = find(b, s, l);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
67
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
68 if(m > 0) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
69 lua_pushinteger(L, m);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
70 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
71 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
72
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
73 return 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
74 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
75
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
76 /*
8544
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
77 * Move read position forward without returning the data
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
78 * (buffer, number) -> boolean
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
79 */
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
80 static int rb_discard(lua_State *L) {
8544
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
81 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
82 size_t r = luaL_checkinteger(L, 2);
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
83
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
84 if(r > b->blen) {
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
85 lua_pushboolean(L, 0);
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
86 return 1;
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
87 }
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
88
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
89 b->blen -= r;
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
90 b->rpos += r;
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
91 modpos(b);
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
92
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
93 lua_pushboolean(L, 1);
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
94 return 1;
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
95 }
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
96
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
97 /*
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
98 * Read bytes from buffer
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
99 * (buffer, number, boolean?) -> string
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
100 */
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
101 static int rb_read(lua_State *L) {
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
102 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
7941
8067828e7e40 util.ringbuffer: Change types of length related variables to size_t [-Wsign-compare]
Kim Alvefur <zash@zash.se>
parents: 7889
diff changeset
103 size_t r = luaL_checkinteger(L, 2);
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
104 int peek = lua_toboolean(L, 3);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
105
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
106 if(r > b->blen) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
107 lua_pushnil(L);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
108 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
109 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
110
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
111 if((b->rpos + r) > b->alen) {
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
112 /* Substring wraps around to the beginning of the buffer */
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
113 lua_pushlstring(L, &b->buffer[b->rpos], b->alen - b->rpos);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
114 lua_pushlstring(L, b->buffer, r - (b->alen - b->rpos));
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
115 lua_concat(L, 2);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
116 } else {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
117 lua_pushlstring(L, &b->buffer[b->rpos], r);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
118 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
119
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
120 if(!peek) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
121 b->blen -= r;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
122 b->rpos += r;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
123 modpos(b);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
124 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
125
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
126 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
128
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
129 /*
8735
856a40ec4a0a util.ringbuffer: Fix typo in comment [codespell]
Kim Alvefur <zash@zash.se>
parents: 8544
diff changeset
130 * Read buffer until first occurrence of a substring
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
131 * (buffer, string) -> string
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
132 */
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
133 static int rb_readuntil(lua_State *L) {
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
134 size_t l, m;
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
135 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
136 const char *s = luaL_checklstring(L, 2, &l);
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
137 m = find(b, s, l);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
138
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
139 if(m > 0) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
140 lua_settop(L, 1);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
141 lua_pushinteger(L, m);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
142 return rb_read(L);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
143 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
144
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
145 return 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
146 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
147
8543
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
148 /*
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
149 * Write bytes into the buffer
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
150 * (buffer, string) -> integer
0e1d8f2f02bf util.ringbuffer: Add various comments
Kim Alvefur <zash@zash.se>
parents: 7969
diff changeset
151 */
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
152 static int rb_write(lua_State *L) {
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
153 size_t l, w = 0;
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
154 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
155 const char *s = luaL_checklstring(L, 2, &l);
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
156
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
157 /* Does `l` bytes fit? */
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
158 if((l + b->blen) > b->alen) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
159 lua_pushnil(L);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
160 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
161 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
162
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
163 while(l-- > 0) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
164 writechar(b, *s++);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
165 w++;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
166 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
167
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
168 modpos(b);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
169
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
170 lua_pushinteger(L, w);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
171
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
172 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
173 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
174
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
175 static int rb_tostring(lua_State *L) {
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
176 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
7888
74187ee6ed55 util.ringbuffer: Remove address of buffer itself from __tostring since is now in the same struct
Kim Alvefur <zash@zash.se>
parents: 7835
diff changeset
177 lua_pushfstring(L, "ringbuffer: %p %d/%d", b, b->blen, b->alen);
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
178 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
179 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
180
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
181 static int rb_length(lua_State *L) {
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
182 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
183 lua_pushinteger(L, b->blen);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
184 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
185 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
186
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
187 static int rb_size(lua_State *L) {
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
188 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
189 lua_pushinteger(L, b->alen);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
190 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
191 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
192
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
193 static int rb_free(lua_State *L) {
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
194 ringbuffer *b = luaL_checkudata(L, 1, "ringbuffer_mt");
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
195 lua_pushinteger(L, b->alen - b->blen);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
196 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
197 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
198
10480
94cacf9fd0ae util.*.c: Add static qualifiers everywhere
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents: 8735
diff changeset
199 static int rb_new(lua_State *L) {
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
200 size_t size = luaL_optinteger(L, 1, sysconf(_SC_PAGESIZE));
7828
b4a08a514ebc util.ringbuffer: Allocate buffer itself as part of userdata (simpler, single allocation, no need for __gc)
Kim Alvefur <zash@zash.se>
parents: 7827
diff changeset
201 ringbuffer *b = lua_newuserdata(L, sizeof(ringbuffer) + size);
b4a08a514ebc util.ringbuffer: Allocate buffer itself as part of userdata (simpler, single allocation, no need for __gc)
Kim Alvefur <zash@zash.se>
parents: 7827
diff changeset
202
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
203 b->rpos = 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
204 b->wpos = 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
205 b->alen = size;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
206 b->blen = 0;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
207
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
208 luaL_getmetatable(L, "ringbuffer_mt");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
209 lua_setmetatable(L, -2);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
210
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
211 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
212 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
213
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
214 int luaopen_util_ringbuffer(lua_State *L) {
7818
54669df178c2 util-src: Make C modules assert that the Lua runtime matches what it was compiled for
Kim Alvefur <zash@zash.se>
parents: 7117
diff changeset
215 #if (LUA_VERSION_NUM > 501)
54669df178c2 util-src: Make C modules assert that the Lua runtime matches what it was compiled for
Kim Alvefur <zash@zash.se>
parents: 7117
diff changeset
216 luaL_checkversion(L);
54669df178c2 util-src: Make C modules assert that the Lua runtime matches what it was compiled for
Kim Alvefur <zash@zash.se>
parents: 7117
diff changeset
217 #endif
7889
b8d694646597 util-src/*.c: Attach pointer * to name instead of type
Kim Alvefur <zash@zash.se>
parents: 7888
diff changeset
218
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
219 if(luaL_newmetatable(L, "ringbuffer_mt")) {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
220 lua_pushcfunction(L, rb_tostring);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
221 lua_setfield(L, -2, "__tostring");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
222 lua_pushcfunction(L, rb_length);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
223 lua_setfield(L, -2, "__len");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
224
7969
1c6a07606309 util-src: Specify size of various tables to be allocated
Kim Alvefur <zash@zash.se>
parents: 7941
diff changeset
225 lua_createtable(L, 0, 7); /* __index */
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
226 {
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
227 lua_pushcfunction(L, rb_find);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
228 lua_setfield(L, -2, "find");
8544
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
229 lua_pushcfunction(L, rb_discard);
e7214441523b util.ringbuffer: Add method for discarding buffered data without returning it to lua
Kim Alvefur <zash@zash.se>
parents: 8543
diff changeset
230 lua_setfield(L, -2, "discard");
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
231 lua_pushcfunction(L, rb_read);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
232 lua_setfield(L, -2, "read");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
233 lua_pushcfunction(L, rb_readuntil);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
234 lua_setfield(L, -2, "readuntil");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
235 lua_pushcfunction(L, rb_write);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
236 lua_setfield(L, -2, "write");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
237 lua_pushcfunction(L, rb_size);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
238 lua_setfield(L, -2, "size");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
239 lua_pushcfunction(L, rb_length);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
240 lua_setfield(L, -2, "length");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
241 lua_pushcfunction(L, rb_free);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
242 lua_setfield(L, -2, "free");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
243 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
244 lua_setfield(L, -2, "__index");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
245 }
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
246
7969
1c6a07606309 util-src: Specify size of various tables to be allocated
Kim Alvefur <zash@zash.se>
parents: 7941
diff changeset
247 lua_createtable(L, 0, 1);
7117
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
248 lua_pushcfunction(L, rb_new);
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
249 lua_setfield(L, -2, "new");
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
250 return 1;
2b4432cc9c29 Add util.ringbuffer, a ringbuffer with a file handle like interface
Kim Alvefur <zash@zash.se>
parents:
diff changeset
251 }