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