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-rw-r--r--src/lua/lstrlib.c621
1 files changed, 0 insertions, 621 deletions
diff --git a/src/lua/lstrlib.c b/src/lua/lstrlib.c
deleted file mode 100644
index 051eccf7..00000000
--- a/src/lua/lstrlib.c
+++ /dev/null
@@ -1,621 +0,0 @@
-/*
-** $Id: lstrlib.c,v 1.3 2001/11/26 23:00:26 darkgod Exp $
-** Standard library for string operations and pattern-matching
-** See Copyright Notice in lua.h
-*/
-
-
-#include <ctype.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-
-
-static int str_len (lua_State *L) {
- size_t l;
- luaL_check_lstr(L, 1, &l);
- lua_pushnumber(L, l);
- return 1;
-}
-
-
-static long posrelat (long pos, size_t len) {
- /* relative string position: negative means back from end */
- return (pos>=0) ? pos : (long)len+pos+1;
-}
-
-
-static int str_sub (lua_State *L) {
- size_t l;
- const char *s = luaL_check_lstr(L, 1, &l);
- long start = posrelat(luaL_check_long(L, 2), l);
- long end = posrelat(luaL_opt_long(L, 3, -1), l);
- if (start < 1) start = 1;
- if (end > (long)l) end = l;
- if (start <= end)
- lua_pushlstring(L, s+start-1, end-start+1);
- else lua_pushstring(L, "");
- return 1;
-}
-
-
-static int str_lower (lua_State *L) {
- size_t l;
- size_t i;
- luaL_Buffer b;
- const char *s = luaL_check_lstr(L, 1, &l);
- luaL_buffinit(L, &b);
- for (i=0; i<l; i++)
- luaL_putchar(&b, tolower((unsigned char)(s[i])));
- luaL_pushresult(&b);
- return 1;
-}
-
-
-static int str_upper (lua_State *L) {
- size_t l;
- size_t i;
- luaL_Buffer b;
- const char *s = luaL_check_lstr(L, 1, &l);
- luaL_buffinit(L, &b);
- for (i=0; i<l; i++)
- luaL_putchar(&b, toupper((unsigned char)(s[i])));
- luaL_pushresult(&b);
- return 1;
-}
-
-static int str_rep (lua_State *L) {
- size_t l;
- luaL_Buffer b;
- const char *s = luaL_check_lstr(L, 1, &l);
- int n = luaL_check_int(L, 2);
- luaL_buffinit(L, &b);
- while (n-- > 0)
- luaL_addlstring(&b, s, l);
- luaL_pushresult(&b);
- return 1;
-}
-
-
-static int str_byte (lua_State *L) {
- size_t l;
- const char *s = luaL_check_lstr(L, 1, &l);
- long pos = posrelat(luaL_opt_long(L, 2, 1), l);
- luaL_arg_check(L, 0<pos && (size_t)pos<=l, 2, "out of range");
- lua_pushnumber(L, (unsigned char)s[pos-1]);
- return 1;
-}
-
-
-static int str_char (lua_State *L) {
- int n = lua_gettop(L); /* number of arguments */
- int i;
- luaL_Buffer b;
- luaL_buffinit(L, &b);
- for (i=1; i<=n; i++) {
- int c = luaL_check_int(L, i);
- luaL_arg_check(L, (unsigned char)c == c, i, "invalid value");
- luaL_putchar(&b, (unsigned char)c);
- }
- luaL_pushresult(&b);
- return 1;
-}
-
-
-
-/*
-** {======================================================
-** PATTERN MATCHING
-** =======================================================
-*/
-
-#ifndef MAX_CAPTURES
-#define MAX_CAPTURES 32 /* arbitrary limit */
-#endif
-
-
-struct Capture {
- const char *src_end; /* end ('\0') of source string */
- int level; /* total number of captures (finished or unfinished) */
- struct {
- const char *init;
- long len; /* -1 signals unfinished capture */
- } capture[MAX_CAPTURES];
-};
-
-
-#define ESC '%'
-#define SPECIALS "^$*+?.([%-"
-
-
-static int check_capture (lua_State *L, int l, struct Capture *cap) {
- l -= '1';
- if (!(0 <= l && l < cap->level && cap->capture[l].len != -1))
- lua_error(L, "invalid capture index");
- return l;
-}
-
-
-static int capture_to_close (lua_State *L, struct Capture *cap) {
- int level = cap->level;
- for (level--; level>=0; level--)
- if (cap->capture[level].len == -1) return level;
- lua_error(L, "invalid pattern capture");
- return 0; /* to avoid warnings */
-}
-
-
-const char *luaI_classend (lua_State *L, const char *p) {
- switch (*p++) {
- case ESC:
- if (*p == '\0') lua_error(L, "malformed pattern (ends with `%')");
- return p+1;
- case '[':
- if (*p == '^') p++;
- do { /* look for a ']' */
- if (*p == '\0') lua_error(L, "malformed pattern (missing `]')");
- if (*(p++) == ESC && *p != '\0') p++; /* skip escapes (e.g. '%]') */
- } while (*p != ']');
- return p+1;
- default:
- return p;
- }
-}
-
-
-static int match_class (int c, int cl) {
- int res;
- switch (tolower(cl)) {
- case 'a' : res = isalpha(c); break;
- case 'c' : res = iscntrl(c); break;
- case 'd' : res = isdigit(c); break;
- case 'l' : res = islower(c); break;
- case 'p' : res = ispunct(c); break;
- case 's' : res = isspace(c); break;
- case 'u' : res = isupper(c); break;
- case 'w' : res = isalnum(c); break;
- case 'x' : res = isxdigit(c); break;
- case 'z' : res = (c == '\0'); break;
- default: return (cl == c);
- }
- return (islower(cl) ? res : !res);
-}
-
-
-
-static int matchbracketclass (int c, const char *p, const char *endclass) {
- int sig = 1;
- if (*(p+1) == '^') {
- sig = 0;
- p++; /* skip the '^' */
- }
- while (++p < endclass) {
- if (*p == ESC) {
- p++;
- if (match_class(c, (unsigned char)*p))
- return sig;
- }
- else if ((*(p+1) == '-') && (p+2 < endclass)) {
- p+=2;
- if ((int)(unsigned char)*(p-2) <= c && c <= (int)(unsigned char)*p)
- return sig;
- }
- else if ((int)(unsigned char)*p == c) return sig;
- }
- return !sig;
-}
-
-
-
-int luaI_singlematch (int c, const char *p, const char *ep) {
- switch (*p) {
- case '.': /* matches any char */
- return 1;
- case ESC:
- return match_class(c, (unsigned char)*(p+1));
- case '[':
- return matchbracketclass(c, p, ep-1);
- default:
- return ((unsigned char)*p == c);
- }
-}
-
-
-static const char *match (lua_State *L, const char *s, const char *p,
- struct Capture *cap);
-
-
-static const char *matchbalance (lua_State *L, const char *s, const char *p,
- struct Capture *cap) {
- if (*p == 0 || *(p+1) == 0)
- lua_error(L, "unbalanced pattern");
- if (*s != *p) return NULL;
- else {
- int b = *p;
- int e = *(p+1);
- int cont = 1;
- while (++s < cap->src_end) {
- if (*s == e) {
- if (--cont == 0) return s+1;
- }
- else if (*s == b) cont++;
- }
- }
- return NULL; /* string ends out of balance */
-}
-
-
-static const char *max_expand (lua_State *L, const char *s, const char *p,
- const char *ep, struct Capture *cap) {
- long i = 0; /* counts maximum expand for item */
- while ((s+i)<cap->src_end && luaI_singlematch((unsigned char)*(s+i), p, ep))
- i++;
- /* keeps trying to match with the maximum repetitions */
- while (i>=0) {
- const char *res = match(L, (s+i), ep+1, cap);
- if (res) return res;
- i--; /* else didn't match; reduce 1 repetition to try again */
- }
- return NULL;
-}
-
-
-static const char *min_expand (lua_State *L, const char *s, const char *p,
- const char *ep, struct Capture *cap) {
- for (;;) {
- const char *res = match(L, s, ep+1, cap);
- if (res != NULL)
- return res;
- else if (s<cap->src_end && luaI_singlematch((unsigned char)*s, p, ep))
- s++; /* try with one more repetition */
- else return NULL;
- }
-}
-
-
-static const char *start_capture (lua_State *L, const char *s, const char *p,
- struct Capture *cap) {
- const char *res;
- int level = cap->level;
- if (level >= MAX_CAPTURES) lua_error(L, "too many captures");
- cap->capture[level].init = s;
- cap->capture[level].len = -1;
- cap->level = level+1;
- if ((res=match(L, s, p+1, cap)) == NULL) /* match failed? */
- cap->level--; /* undo capture */
- return res;
-}
-
-
-static const char *end_capture (lua_State *L, const char *s, const char *p,
- struct Capture *cap) {
- int l = capture_to_close(L, cap);
- const char *res;
- cap->capture[l].len = s - cap->capture[l].init; /* close capture */
- if ((res = match(L, s, p+1, cap)) == NULL) /* match failed? */
- cap->capture[l].len = -1; /* undo capture */
- return res;
-}
-
-
-static const char *match_capture (lua_State *L, const char *s, int level,
- struct Capture *cap) {
- int l = check_capture(L, level, cap);
- size_t len = cap->capture[l].len;
- if ((size_t)(cap->src_end-s) >= len &&
- memcmp(cap->capture[l].init, s, len) == 0)
- return s+len;
- else return NULL;
-}
-
-
-static const char *match (lua_State *L, const char *s, const char *p,
- struct Capture *cap) {
- init: /* using goto's to optimize tail recursion */
- switch (*p) {
- case '(': /* start capture */
- return start_capture(L, s, p, cap);
- case ')': /* end capture */
- return end_capture(L, s, p, cap);
- case ESC: /* may be %[0-9] or %b */
- if (isdigit((unsigned char)(*(p+1)))) { /* capture? */
- s = match_capture(L, s, *(p+1), cap);
- if (s == NULL) return NULL;
- p+=2; goto init; /* else return match(L, s, p+2, cap) */
- }
- else if (*(p+1) == 'b') { /* balanced string? */
- s = matchbalance(L, s, p+2, cap);
- if (s == NULL) return NULL;
- p+=4; goto init; /* else return match(L, s, p+4, cap); */
- }
- else goto dflt; /* case default */
- case '\0': /* end of pattern */
- return s; /* match succeeded */
- case '$':
- if (*(p+1) == '\0') /* is the '$' the last char in pattern? */
- return (s == cap->src_end) ? s : NULL; /* check end of string */
- else goto dflt;
- default: dflt: { /* it is a pattern item */
- const char *ep = luaI_classend(L, p); /* points to what is next */
- int m = s<cap->src_end && luaI_singlematch((unsigned char)*s, p, ep);
- switch (*ep) {
- case '?': { /* optional */
- const char *res;
- if (m && ((res=match(L, s+1, ep+1, cap)) != NULL))
- return res;
- p=ep+1; goto init; /* else return match(L, s, ep+1, cap); */
- }
- case '*': /* 0 or more repetitions */
- return max_expand(L, s, p, ep, cap);
- case '+': /* 1 or more repetitions */
- return (m ? max_expand(L, s+1, p, ep, cap) : NULL);
- case '-': /* 0 or more repetitions (minimum) */
- return min_expand(L, s, p, ep, cap);
- default:
- if (!m) return NULL;
- s++; p=ep; goto init; /* else return match(L, s+1, ep, cap); */
- }
- }
- }
-}
-
-
-
-static const char *lmemfind (const char *s1, size_t l1,
- const char *s2, size_t l2) {
- if (l2 == 0) return s1; /* empty strings are everywhere */
- else if (l2 > l1) return NULL; /* avoids a negative `l1' */
- else {
- const char *init; /* to search for a `*s2' inside `s1' */
- l2--; /* 1st char will be checked by `memchr' */
- l1 = l1-l2; /* `s2' cannot be found after that */
- while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {
- init++; /* 1st char is already checked */
- if (memcmp(init, s2+1, l2) == 0)
- return init-1;
- else { /* correct `l1' and `s1' to try again */
- l1 -= init-s1;
- s1 = init;
- }
- }
- return NULL; /* not found */
- }
-}
-
-
-static int push_captures (lua_State *L, struct Capture *cap) {
- int i;
- luaL_checkstack(L, cap->level, "too many captures");
- for (i=0; i<cap->level; i++) {
- int l = cap->capture[i].len;
- if (l == -1) lua_error(L, "unfinished capture");
- lua_pushlstring(L, cap->capture[i].init, l);
- }
- return cap->level; /* number of strings pushed */
-}
-
-
-static int str_find (lua_State *L) {
- size_t l1, l2;
- const char *s = luaL_check_lstr(L, 1, &l1);
- const char *p = luaL_check_lstr(L, 2, &l2);
- long init = posrelat(luaL_opt_long(L, 3, 1), l1) - 1;
- struct Capture cap;
- luaL_arg_check(L, 0 <= init && (size_t)init <= l1, 3, "out of range");
- if (lua_gettop(L) > 3 || /* extra argument? */
- strpbrk(p, SPECIALS) == NULL) { /* or no special characters? */
- const char *s2 = lmemfind(s+init, l1-init, p, l2);
- if (s2) {
- lua_pushnumber(L, s2-s+1);
- lua_pushnumber(L, s2-s+l2);
- return 2;
- }
- }
- else {
- int anchor = (*p == '^') ? (p++, 1) : 0;
- const char *s1=s+init;
- cap.src_end = s+l1;
- do {
- const char *res;
- cap.level = 0;
- if ((res=match(L, s1, p, &cap)) != NULL) {
- lua_pushnumber(L, s1-s+1); /* start */
- lua_pushnumber(L, res-s); /* end */
- return push_captures(L, &cap) + 2;
- }
- } while (s1++<cap.src_end && !anchor);
- }
- lua_pushnil(L); /* not found */
- return 1;
-}
-
-
-static void add_s (lua_State *L, luaL_Buffer *b, struct Capture *cap) {
- if (lua_isstring(L, 3)) {
- const char *news = lua_tostring(L, 3);
- size_t l = lua_strlen(L, 3);
- size_t i;
- for (i=0; i<l; i++) {
- if (news[i] != ESC)
- luaL_putchar(b, news[i]);
- else {
- i++; /* skip ESC */
- if (!isdigit((unsigned char)news[i]))
- luaL_putchar(b, news[i]);
- else {
- int level = check_capture(L, news[i], cap);
- luaL_addlstring(b, cap->capture[level].init, cap->capture[level].len);
- }
- }
- }
- }
- else { /* is a function */
- int n;
- lua_pushvalue(L, 3);
- n = push_captures(L, cap);
- lua_rawcall(L, n, 1);
- if (lua_isstring(L, -1))
- luaL_addvalue(b); /* add return to accumulated result */
- else
- lua_pop(L, 1); /* function result is not a string: pop it */
- }
-}
-
-
-static int str_gsub (lua_State *L) {
- size_t srcl;
- const char *src = luaL_check_lstr(L, 1, &srcl);
- const char *p = luaL_check_string(L, 2);
- int max_s = luaL_opt_int(L, 4, srcl+1);
- int anchor = (*p == '^') ? (p++, 1) : 0;
- int n = 0;
- struct Capture cap;
- luaL_Buffer b;
- luaL_arg_check(L,
- lua_gettop(L) >= 3 && (lua_isstring(L, 3) || lua_isfunction(L, 3)),
- 3, "string or function expected");
- luaL_buffinit(L, &b);
- cap.src_end = src+srcl;
- while (n < max_s) {
- const char *e;
- cap.level = 0;
- e = match(L, src, p, &cap);
- if (e) {
- n++;
- add_s(L, &b, &cap);
- }
- if (e && e>src) /* non empty match? */
- src = e; /* skip it */
- else if (src < cap.src_end)
- luaL_putchar(&b, *src++);
- else break;
- if (anchor) break;
- }
- luaL_addlstring(&b, src, cap.src_end-src);
- luaL_pushresult(&b);
- lua_pushnumber(L, n); /* number of substitutions */
- return 2;
-}
-
-/* }====================================================== */
-
-
-static void luaI_addquoted (lua_State *L, luaL_Buffer *b, int arg) {
- size_t l;
- const char *s = luaL_check_lstr(L, arg, &l);
- luaL_putchar(b, '"');
- while (l--) {
- switch (*s) {
- case '"': case '\\': case '\n':
- luaL_putchar(b, '\\');
- luaL_putchar(b, *s);
- break;
- case '\0': luaL_addlstring(b, "\\000", 4); break;
- default: luaL_putchar(b, *s);
- }
- s++;
- }
- luaL_putchar(b, '"');
-}
-
-/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
-#define MAX_ITEM 512
-/* maximum size of each format specification (such as '%-099.99d') */
-#define MAX_FORMAT 20
-
-static int str_format (lua_State *L) {
- int arg = 1;
- const char *strfrmt = luaL_check_string(L, arg);
- luaL_Buffer b;
- luaL_buffinit(L, &b);
- while (*strfrmt) {
- if (*strfrmt != '%')
- luaL_putchar(&b, *strfrmt++);
- else if (*++strfrmt == '%')
- luaL_putchar(&b, *strfrmt++); /* %% */
- else { /* format item */
- struct Capture cap;
- char form[MAX_FORMAT]; /* to store the format ('%...') */
- char buff[MAX_ITEM]; /* to store the formatted item */
- const char *initf = strfrmt;
- form[0] = '%';
- if (isdigit((unsigned char)*initf) && *(initf+1) == '$') {
- arg = *initf - '0';
- initf += 2; /* skip the 'n$' */
- }
- arg++;
- cap.src_end = strfrmt+strlen(strfrmt)+1;
- cap.level = 0;
- strfrmt = match(L, initf, "[-+ #0]*(%d*)%.?(%d*)", &cap);
- if (cap.capture[0].len > 2 || cap.capture[1].len > 2 || /* < 100? */
- strfrmt-initf > MAX_FORMAT-2)
- lua_error(L, "invalid format (width or precision too long)");
- strncpy(form+1, initf, strfrmt-initf+1); /* +1 to include conversion */
- form[strfrmt-initf+2] = 0;
- switch (*strfrmt++) {
- case 'c': case 'd': case 'i':
- sprintf(buff, form, luaL_check_int(L, arg));
- break;
- case 'o': case 'u': case 'x': case 'X':
- sprintf(buff, form, (unsigned int)luaL_check_number(L, arg));
- break;
- case 'e': case 'E': case 'f': case 'g': case 'G':
- sprintf(buff, form, luaL_check_number(L, arg));
- break;
- case 'q':
- luaI_addquoted(L, &b, arg);
- continue; /* skip the "addsize" at the end */
- case 's': {
- size_t l;
- const char *s = luaL_check_lstr(L, arg, &l);
- if (cap.capture[1].len == 0 && l >= 100) {
- /* no precision and string is too long to be formatted;
- keep original string */
- lua_pushvalue(L, arg);
- luaL_addvalue(&b);
- continue; /* skip the "addsize" at the end */
- }
- else {
- sprintf(buff, form, s);
- break;
- }
- }
- default: /* also treat cases 'pnLlh' */
- lua_error(L, "invalid option in `format'");
- }
- luaL_addlstring(&b, buff, strlen(buff));
- }
- }
- luaL_pushresult(&b);
- return 1;
-}
-
-
-static const struct luaL_reg strlib[] = {
-{"strlen", str_len},
-{"strsub", str_sub},
-{"strlower", str_lower},
-{"strupper", str_upper},
-{"strchar", str_char},
-{"strrep", str_rep},
-{"ascii", str_byte}, /* for compatibility with 3.0 and earlier */
-{"strbyte", str_byte},
-{"format", str_format},
-{"strfind", str_find},
-{"gsub", str_gsub}
-};
-
-
-/*
-** Open string library
-*/
-LUALIB_API void lua_strlibopen (lua_State *L) {
- luaL_openl(L, strlib);
-}
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