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136 lines
2.7 KiB
C
136 lines
2.7 KiB
C
// clang-format off
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/*
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* $Id: lua.c 443 2006-05-30 04:37:13Z darren $
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*
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* Copyright (c) 2000-2001, Max Ischenko <mfi@ukr.net>.
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*
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* This source code is released for free distribution under the terms of the
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* GNU General Public License.
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*
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* This module contains functions for generating tags for Lua language.
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*/
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/*
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* INCLUDE FILES
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*/
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#include "third_party/ctags/general.h" /* must always come first */
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#include "libc/mem/alg.h"
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#include "libc/str/str.h"
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#include "third_party/ctags/options.h"
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#include "third_party/ctags/parse.h"
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#include "third_party/ctags/read.h"
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#include "third_party/ctags/vstring.h"
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/*
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* DATA DEFINITIONS
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*/
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typedef enum {
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K_FUNCTION
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} luaKind;
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static kindOption LuaKinds [] = {
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{ TRUE, 'f', "function", "functions" }
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};
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/*
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* FUNCTION DEFINITIONS
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*/
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/* for debugging purposes */
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static void __unused print_string (char *p, char *q)
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{
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for ( ; p != q; p++)
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fprintf (errout, "%c", *p);
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fprintf (errout, "\n");
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}
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/*
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* Helper function.
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* Returns 1 if line looks like a line of Lua code.
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*
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* TODO: Recognize UNIX bang notation.
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* (Lua treat first line as a comment if it starts with #!)
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*
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*/
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static boolean is_a_code_line (const unsigned char *line)
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{
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boolean result;
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const unsigned char *p = line;
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while (isspace ((int) *p))
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p++;
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if (p [0] == '\0')
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result = FALSE;
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else if (p [0] == '-' && p [1] == '-')
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result = FALSE;
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else
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result = TRUE;
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return result;
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}
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static void extract_name (const char *begin, const char *end, vString *name)
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{
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if (begin != NULL && end != NULL && begin < end)
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{
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const char *cp;
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while (isspace ((int) *begin))
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begin++;
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while (isspace ((int) *end))
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end--;
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if (begin < end)
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{
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for (cp = begin ; cp != end; cp++)
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vStringPut (name, (int) *cp);
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vStringTerminate (name);
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makeSimpleTag (name, LuaKinds, K_FUNCTION);
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vStringClear (name);
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}
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}
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}
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static void findLuaTags (void)
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{
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vString *name = vStringNew ();
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const unsigned char *line;
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while ((line = fileReadLine ()) != NULL)
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{
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const char *p, *q;
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if (! is_a_code_line (line))
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continue;
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p = (const char*) strstr ((const char*) line, "function");
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if (p == NULL)
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continue;
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q = strchr ((const char*) line, '=');
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if (q == NULL) {
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p = p + 9; /* skip the `function' word */
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q = strchr ((const char*) p, '(');
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extract_name (p, q, name);
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} else {
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p = (const char*) &line[0];
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extract_name (p, q, name);
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}
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}
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vStringDelete (name);
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}
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extern parserDefinition* LuaParser (void)
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{
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static const char* const extensions [] = { "lua", NULL };
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parserDefinition* def = parserNew ("Lua");
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def->kinds = LuaKinds;
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def->kindCount = KIND_COUNT (LuaKinds);
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def->extensions = extensions;
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def->parser = findLuaTags;
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return def;
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}
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/* vi:set tabstop=4 shiftwidth=4: */
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