/*------------------------------------------------------------------------- * * keywords.c * lexical token lookup for reserved words in postgres embedded SQL * *------------------------------------------------------------------------- */ #include "postgres_fe.h" #include <ctype.h> #include "extern.h" #include "preproc.h" /* * List of (keyword-name, keyword-token-value) pairs. * * !!WARNING!!: This list must be sorted, because binary * search is used to locate entries. */ static ScanKeyword ScanKeywords[] = { /* name value */ {"VARCHAR", VARCHAR}, {"auto", S_AUTO}, {"bool", SQL_BOOL}, {"char", CHAR_P}, {"const", S_CONST}, {"double", DOUBLE}, {"enum", SQL_ENUM}, {"extern", S_EXTERN}, {"float", FLOAT_P}, {"int", INT}, {"long", SQL_LONG}, {"register", S_REGISTER}, {"short", SQL_SHORT}, {"signed", SQL_SIGNED}, {"static", S_STATIC}, {"struct", SQL_STRUCT}, {"typedef", S_TYPEDEF}, {"union", UNION}, {"unsigned", SQL_UNSIGNED}, {"varchar", VARCHAR}, {"volatile", S_VOLATILE}, }; ScanKeyword * ScanCKeywordLookup(char *text) { ScanKeyword *low = &ScanKeywords[0]; ScanKeyword *high = endof(ScanKeywords) - 1; ScanKeyword *middle; int difference; while (low <= high) { middle = low + (high - low) / 2; difference = strcmp(middle->name, text); if (difference == 0) return middle; else if (difference < 0) low = middle + 1; else high = middle - 1; } return NULL; }