git.m6w6.name Git - m6w6/ext-psi/blob - src/parser.re

   1 #include <stddef.h>
   2 #include <stdio.h>
   3 #include <assert.h>
   4 #include <errno.h>
   5 #include <string.h>
   6
   7 #include "parser.h"
   8 #include "parser_proc.h"
   9
  10 void *PSI_ParserProcAlloc(void*(unsigned long));
  11 void PSI_ParserProcFree(void*, void(*)(void*));
  12 void PSI_ParserProc(void *, token_t, PSI_Token *, PSI_Parser *);
  13 void PSI_ParserProcTrace(FILE *, const char*);
  14
  15 PSI_Parser *PSI_ParserInit(PSI_Parser *P, const char *filename, psi_error_cb error, unsigned flags)
  16 {
  17         FILE *fp;
  18
  19         fp = fopen(filename, "r");
  20
  21         if (!fp) {
  22                 if (!(flags & PSI_PARSER_SILENT)) {
  23                         error(NULL, NULL, PSI_WARNING, "Could not open '%s' for reading: %s",
  24                                         filename, strerror(errno));
  25                 }
  26                 return NULL;
  27         }
  28
  29         if (!P) {
  30                 P = malloc(sizeof(*P));
  31         }
  32         memset(P, 0, sizeof(*P));
  33
  34         P->psi.file.fn = strdup(filename);
  35         P->fp = fp;
  36         P->col = 1;
  37         P->line = 1;
  38         P->error = error;
  39         P->flags = flags;
  40
  41         P->proc = PSI_ParserProcAlloc(malloc);
  42         if (flags & PSI_PARSER_DEBUG) {
  43                 PSI_ParserProcTrace(stderr, "PSI> ");
  44         }
  45
  46         PSI_ParserFill(P, 0);
  47
  48         return P;
  49 }
  50
  51 size_t PSI_ParserFill(PSI_Parser *P, size_t n)
  52 {
  53         if (P->flags & PSI_PARSER_DEBUG) {
  54                 fprintf(stderr, "PSI> Fill: n=%zu\n", n);
  55         }
  56         if (!n) {
  57                 P->cur = P->tok = P->lim = P->mrk = P->buf;
  58                 P->eof = NULL;
  59         }
  60
  61         if (!P->eof) {
  62                 size_t consumed = P->tok - P->buf;
  63                 size_t reserved = P->lim - P->tok;
  64                 size_t available = BSIZE - reserved;
  65                 size_t didread;
  66
  67                 if (consumed) {
  68                         memmove(P->buf, P->tok, reserved);
  69                         P->tok -= consumed;
  70                         P->cur -= consumed;
  71                         P->lim -= consumed;
  72                         P->mrk -= consumed;
  73                 }
  74
  75                 didread = fread(P->lim, 1, available, P->fp);
  76                 P->lim += didread;
  77                 if (didread < available) {
  78                         P->eof = P->lim;
  79                 }
  80
  81                 if (P->flags & PSI_PARSER_DEBUG) {
  82                         fprintf(stderr, "PSI> Fill: consumed=%zu reserved=%zu available=%zu didread=%zu\n",
  83                                 consumed, reserved, available, didread);
  84                 }
  85         }
  86         if (P->flags & PSI_PARSER_DEBUG) {
  87                 fprintf(stderr, "PSI> Fill: avail=%zu\n", P->lim - P->cur);
  88         }
  89         return P->lim - P->cur;
  90 }
  91
  92 void PSI_ParserParse(PSI_Parser *P, PSI_Token *T)
  93 {
  94         if (T) {
  95                 PSI_ParserProc(P->proc, T->type, T, P);
  96         } else {
  97                 PSI_ParserProc(P->proc, 0, NULL, P);
  98         }
  99 }
 100
 101 void PSI_ParserDtor(PSI_Parser *P)
 102 {
 103         PSI_ParserProcFree(P->proc, free);
 104
 105         if (P->fp) {
 106                 fclose(P->fp);
 107         }
 108
 109         PSI_DataDtor((PSI_Data *) P);
 110
 111         memset(P, 0, sizeof(*P));
 112 }
 113
 114 void PSI_ParserFree(PSI_Parser **P)
 115 {
 116         if (*P) {
 117                 PSI_ParserDtor(*P);
 118                 free(*P);
 119                 *P = NULL;
 120         }
 121 }
 122
 123 /*!max:re2c*/
 124 #define BSIZE 256
 125
 126 #if BSIZE < YYMAXFILL
 127 # error BSIZE must be greater than YYMAXFILL
 128 #endif
 129
 130 #define RETURN(t) do { \
 131         P->num = t; \
 132         if (P->flags & PSI_PARSER_DEBUG) { \
 133                 fprintf(stderr, "PSI> TOKEN: %d %.*s (EOF=%d %s:%u:%u)\n", \
 134                                 P->num, (int) (P->cur-P->tok), P->tok, P->num == PSI_T_EOF, \
 135                                 P->psi.file.fn, P->line, P->col); \
 136         } \
 137         return t; \
 138 } while(1)
 139
 140 #define ADDCOLS \
 141         P->col += P->cur - P->tok
 142
 143 #define NEWLINE(label) \
 144         P->col = 1; \
 145         ++P->line; \
 146         goto label
 147
 148 token_t PSI_ParserScan(PSI_Parser *P)
 149 {
 150         for (;;) {
 151                 ADDCOLS;
 152         nextline:
 153                 P->tok = P->cur;
 154                 /*!re2c
 155                 re2c:indent:top = 2;
 156                 re2c:define:YYCTYPE = "unsigned char";
 157                 re2c:define:YYCURSOR = P->cur;
 158                 re2c:define:YYLIMIT = P->lim;
 159                 re2c:define:YYMARKER = P->mrk;
 160                 re2c:define:YYFILL = "{ if (!PSI_ParserFill(P,@@)) RETURN(PSI_T_EOF); }";
 161                 re2c:yyfill:parameter = 0;
 162
 163                 B = [^a-zA-Z0-9_];
 164                 W = [a-zA-Z0-9_];
 165                 NAME = [a-zA-Z_]W*;
 166                 NSNAME = (NAME)? ("\\" NAME)+;
 167                 DOLLAR_NAME = '$' NAME;
 168                 QUOTED_STRING = "\"" ([^\"])+ "\"";
 169                 NUMBER = [+-]? [0-9]* "."? [0-9]+ ([eE] [+-]? [0-9]+)?;
 170
 171                 "/*" { goto comment; }
 172                 ("#"|"//") .* "\n" { NEWLINE(nextline); }
 173                 "(" {RETURN(PSI_T_LPAREN);}
 174                 ")" {RETURN(PSI_T_RPAREN);}
 175                 ";" {RETURN(PSI_T_EOS);}
 176                 "," {RETURN(PSI_T_COMMA);}
 177                 ":" {RETURN(PSI_T_COLON);}
 178                 "{" {RETURN(PSI_T_LBRACE);}
 179                 "}" {RETURN(PSI_T_RBRACE);}
 180                 "[" {RETURN(PSI_T_LBRACKET);}
 181                 "]" {RETURN(PSI_T_RBRACKET);}
 182                 "=" {RETURN(PSI_T_EQUALS);}
 183                 "*" {RETURN(PSI_T_ASTERISK);}
 184                 "&" {RETURN(PSI_T_AMPERSAND);}
 185                 "+" {RETURN(PSI_T_PLUS);}
 186                 "-" {RETURN(PSI_T_MINUS);}
 187                 "/" {RETURN(PSI_T_SLASH);}
 188                 "..." {RETURN(PSI_T_ELLIPSIS);}
 189                 [\r\n] { NEWLINE(nextline); }
 190                 [\t ]+ { continue; }
 191                 'TRUE' {RETURN(PSI_T_TRUE);}
 192                 'FALSE' {RETURN(PSI_T_FALSE);}
 193                 'NULL' {RETURN(PSI_T_NULL);}
 194                 'MIXED' {RETURN(PSI_T_MIXED);}
 195                 'CALLABLE' {RETURN(PSI_T_CALLABLE);}
 196                 'VOID' {RETURN(PSI_T_VOID);}
 197                 'BOOL' {RETURN(PSI_T_BOOL);}
 198                 'CHAR' {RETURN(PSI_T_CHAR);}
 199                 'SHORT' {RETURN(PSI_T_SHORT);}
 200                 'INT' {RETURN(PSI_T_INT);}
 201                 'LONG' {RETURN(PSI_T_LONG);}
 202                 'FLOAT' {RETURN(PSI_T_FLOAT);}
 203                 'DOUBLE' {RETURN(PSI_T_DOUBLE);}
 204                 'INT8_T' {RETURN(PSI_T_INT8);}
 205                 'UINT8_T' {RETURN(PSI_T_UINT8);}
 206                 'INT16_T' {RETURN(PSI_T_INT16);}
 207                 'UINT16_T' {RETURN(PSI_T_UINT16);}
 208                 'INT32_T' {RETURN(PSI_T_INT32);}
 209                 'UINT32_T' {RETURN(PSI_T_UINT32);}
 210                 'INT64_T' {RETURN(PSI_T_INT64);}
 211                 'UINT64_T' {RETURN(PSI_T_UINT64);}
 212                 'UNSIGNED' {RETURN(PSI_T_UNSIGNED);}
 213                 'SIGNED' {RETURN(PSI_T_SIGNED);}
 214                 'STRING' {RETURN(PSI_T_STRING);}
 215                 'ARRAY' {RETURN(PSI_T_ARRAY);}
 216                 'OBJECT' {RETURN(PSI_T_OBJECT);}
 217                 'FUNCTION' {RETURN(PSI_T_FUNCTION);}
 218                 'TYPEDEF' {RETURN(PSI_T_TYPEDEF);}
 219                 'STRUCT' {RETURN(PSI_T_STRUCT);}
 220                 'UNION' {RETURN(PSI_T_UNION);}
 221                 'ENUM' {RETURN(PSI_T_ENUM);}
 222                 'CONST' {RETURN(PSI_T_CONST);}
 223                 'LIB' {RETURN(PSI_T_LIB);}
 224                 'LET' {RETURN(PSI_T_LET);}
 225                 'SET' {RETURN(PSI_T_SET);}
 226                 'RETURN' {RETURN(PSI_T_RETURN);}
 227                 'FREE' {RETURN(PSI_T_FREE);}
 228                 'TEMP' {RETURN(PSI_T_TEMP);}
 229                 'STRLEN' {RETURN(PSI_T_STRLEN);}
 230                 'STRVAL' {RETURN(PSI_T_STRVAL);}
 231                 'PATHVAL' {RETURN(PSI_T_PATHVAL);}
 232                 'INTVAL' {RETURN(PSI_T_INTVAL);}
 233                 'FLOATVAL' {RETURN(PSI_T_FLOATVAL);}
 234                 'BOOLVAL' {RETURN(PSI_T_BOOLVAL);}
 235                 'ARRVAL' {RETURN(PSI_T_ARRVAL);}
 236                 'OBJVAL' {RETURN(PSI_T_OBJVAL);}
 237                 'CBVAL' {RETURN(PSI_T_CBVAL);}
 238                 'CALLOC' {RETURN(PSI_T_CALLOC);}
 239                 'TO_OBJECT' {RETURN(PSI_T_TO_OBJECT);}
 240                 'TO_ARRAY' {RETURN(PSI_T_TO_ARRAY);}
 241                 'TO_STRING' {RETURN(PSI_T_TO_STRING);}
 242                 'TO_INT' {RETURN(PSI_T_TO_INT);}
 243                 'TO_FLOAT' {RETURN(PSI_T_TO_FLOAT);}
 244                 'TO_BOOL' {RETURN(PSI_T_TO_BOOL);}
 245                 NUMBER {RETURN(PSI_T_NUMBER);}
 246                 NAME {RETURN(PSI_T_NAME);}
 247                 NSNAME {RETURN(PSI_T_NSNAME);}
 248                 DOLLAR_NAME {RETURN(PSI_T_DOLLAR_NAME);}
 249                 QUOTED_STRING {RETURN(PSI_T_QUOTED_STRING);}
 250                 [^] {break;}
 251                 */
 252
 253         comment:
 254                 P->tok = P->cur;
 255                 /*!re2c
 256                 "\n" { NEWLINE(comment); }
 257                 "*" "/" { continue; }
 258                 [^] { goto comment; }
 259                 */
 260         }
 261         return -1;
 262 }