diff options
Diffstat (limited to 'src/liolib.c')
| -rw-r--r-- | src/liolib.c | 119 |
1 files changed, 61 insertions, 58 deletions
diff --git a/src/liolib.c b/src/liolib.c index 2c6202af..d1605024 100644 --- a/src/liolib.c +++ b/src/liolib.c @@ -1,5 +1,5 @@ /* -** $Id: liolib.c,v 2.114 2013/06/07 19:01:35 roberto Exp $ +** $Id: liolib.c,v 2.120 2014/03/19 18:57:42 roberto Exp $ ** Standard I/O (and system) library ** See Copyright Notice in lua.h */ @@ -29,14 +29,14 @@ #include "lualib.h" -#if !defined(lua_checkmode) +#if !defined(l_checkmode) /* ** Check whether 'mode' matches '[rwa]%+?b?'. ** Change this macro to accept other modes for 'fopen' besides ** the standard ones. */ -#define lua_checkmode(mode) \ +#define l_checkmode(mode) \ (*mode != '\0' && strchr("rwa", *(mode++)) != NULL && \ (*mode != '+' || ++mode) && /* skip if char is '+' */ \ (*mode != 'b' || ++mode) && /* skip if char is 'b' */ \ @@ -46,45 +46,61 @@ /* ** {====================================================== -** lua_popen spawns a new process connected to the current +** l_popen spawns a new process connected to the current ** one through the file streams. ** ======================================================= */ -#if !defined(lua_popen) /* { */ +#if !defined(l_popen) /* { */ -#if defined(LUA_USE_POPEN) /* { */ +#if defined(LUA_USE_POSIX) /* { */ -#define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m)) -#define lua_pclose(L,file) ((void)L, pclose(file)) +#define l_popen(L,c,m) (fflush(NULL), popen(c,m)) +#define l_pclose(L,file) (pclose(file)) #elif defined(LUA_WIN) /* }{ */ -#define lua_popen(L,c,m) ((void)L, _popen(c,m)) -#define lua_pclose(L,file) ((void)L, _pclose(file)) - +#define l_popen(L,c,m) (_popen(c,m)) +#define l_pclose(L,file) (_pclose(file)) #else /* }{ */ -#define lua_popen(L,c,m) ((void)((void)c, m), \ - luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0) -#define lua_pclose(L,file) ((void)((void)L, file), -1) - +/* ANSI definitions */ +#define l_popen(L,c,m) \ + ((void)((void)c, m), \ + luaL_error(L, LUA_QL("popen") " not supported"), \ + (FILE*)0) +#define l_pclose(L,file) ((void)L, (void)file, -1) #endif /* } */ -#endif /* } */ +#endif /* } */ /* }====================================================== */ +#if !defined(l_getc) /* { */ + +#if defined(LUA_USE_POSIX) +#define l_getc(f) getc_unlocked(f) +#define l_lockfile(f) flockfile(f) +#define l_unlockfile(f) funlockfile(f) +#else +#define l_getc(f) getc(f) +#define l_lockfile(f) ((void)0) +#define l_unlockfile(f) ((void)0) +#endif + +#endif /* } */ + + /* ** {====================================================== -** lua_fseek: configuration for longer offsets +** l_fseek: configuration for longer offsets ** ======================================================= */ -#if !defined(lua_fseek) && !defined(LUA_ANSI) /* { */ +#if !defined(l_fseek) /* { */ #if defined(LUA_USE_POSIX) /* { */ @@ -94,22 +110,22 @@ #elif defined(LUA_WIN) && !defined(_CRTIMP_TYPEINFO) \ && defined(_MSC_VER) && (_MSC_VER >= 1400) /* }{ */ -/* Windows (but not DDK) and Visual C++ 2005 or higher */ +/* Windows (but not DDK) and Visual C++ 2005 or higher */ #define l_fseek(f,o,w) _fseeki64(f,o,w) #define l_ftell(f) _ftelli64(f) #define l_seeknum __int64 -#endif /* } */ - -#endif /* } */ - +#else /* }{ */ -#if !defined(l_fseek) /* default definitions */ +/* ANSI definitions */ #define l_fseek(f,o,w) fseek(f,o,w) #define l_ftell(f) ftell(f) #define l_seeknum long -#endif + +#endif /* } */ + +#endif /* } */ /* }====================================================== */ @@ -228,7 +244,7 @@ static int io_open (lua_State *L) { const char *mode = luaL_optstring(L, 2, "r"); LStream *p = newfile(L); const char *md = mode; /* to traverse/check mode */ - luaL_argcheck(L, lua_checkmode(md), 2, "invalid mode"); + luaL_argcheck(L, l_checkmode(md), 2, "invalid mode"); p->f = fopen(filename, mode); return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1; } @@ -239,7 +255,7 @@ static int io_open (lua_State *L) { */ static int io_pclose (lua_State *L) { LStream *p = tolstream(L); - return luaL_execresult(L, lua_pclose(L, p->f)); + return luaL_execresult(L, l_pclose(L, p->f)); } @@ -247,7 +263,7 @@ static int io_popen (lua_State *L) { const char *filename = luaL_checkstring(L, 1); const char *mode = luaL_optstring(L, 2, "r"); LStream *p = newprefile(L); - p->f = lua_popen(L, filename, mode); + p->f = l_popen(L, filename, mode); p->closef = &io_pclose; return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1; } @@ -375,7 +391,7 @@ static int read_number (lua_State *L, FILE *f) { static int test_eof (lua_State *L, FILE *f) { int c = getc(f); - ungetc(c, f); + ungetc(c, f); /* no-op when c == EOF */ lua_pushlstring(L, NULL, 0); return (c != EOF); } @@ -383,40 +399,27 @@ static int test_eof (lua_State *L, FILE *f) { static int read_line (lua_State *L, FILE *f, int chop) { luaL_Buffer b; + int c; luaL_buffinit(L, &b); - for (;;) { - size_t l; - char *p = luaL_prepbuffer(&b); - if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) { /* eof? */ - luaL_pushresult(&b); /* close buffer */ - return (lua_rawlen(L, -1) > 0); /* check whether read something */ - } - l = strlen(p); - if (l == 0 || p[l-1] != '\n') - luaL_addsize(&b, l); - else { - luaL_addsize(&b, l - chop); /* chop 'eol' if needed */ - luaL_pushresult(&b); /* close buffer */ - return 1; /* read at least an `eol' */ - } - } + l_lockfile(f); + while ((c = l_getc(f)) != EOF && c != '\n') + luaL_addchar(&b, c); + l_unlockfile(f); + if (!chop && c == '\n') luaL_addchar(&b, c); + luaL_pushresult(&b); /* close buffer */ + return (c == '\n' || lua_rawlen(L, -1) > 0); } -#define MAX_SIZE_T (~(size_t)0) - static void read_all (lua_State *L, FILE *f) { - size_t rlen = LUAL_BUFFERSIZE; /* how much to read in each cycle */ + size_t nr; luaL_Buffer b; luaL_buffinit(L, &b); - for (;;) { - char *p = luaL_prepbuffsize(&b, rlen); - size_t nr = fread(p, sizeof(char), rlen, f); + do { /* read file in chunks of LUAL_BUFFERSIZE bytes */ + char *p = luaL_prepbuffsize(&b, LUAL_BUFFERSIZE); + nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f); luaL_addsize(&b, nr); - if (nr < rlen) break; /* eof? */ - else if (rlen <= (MAX_SIZE_T / 4)) /* avoid buffers too large */ - rlen *= 2; /* double buffer size at each iteration */ - } + } while (nr == LUAL_BUFFERSIZE); luaL_pushresult(&b); /* close buffer */ } @@ -566,15 +569,15 @@ static int f_seek (lua_State *L) { static const char *const modenames[] = {"set", "cur", "end", NULL}; FILE *f = tofile(L); int op = luaL_checkoption(L, 2, "cur", modenames); - lua_Number p3 = luaL_optnumber(L, 3, 0); + lua_Integer p3 = luaL_optinteger(L, 3, 0); l_seeknum offset = (l_seeknum)p3; - luaL_argcheck(L, (lua_Number)offset == p3, 3, + luaL_argcheck(L, (lua_Integer)offset == p3, 3, "not an integer in proper range"); op = l_fseek(f, offset, mode[op]); if (op) return luaL_fileresult(L, 0, NULL); /* error */ else { - lua_pushnumber(L, (lua_Number)l_ftell(f)); + lua_pushinteger(L, (lua_Integer)l_ftell(f)); return 1; } } |