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/*-------------------------------------------------------------------------
*
* keywords.c
* lexical token lookup for reserved words in postgres embedded SQL
*
*-------------------------------------------------------------------------
*/
#include <ctype.h>
#include <string.h>
#include "postgres.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", S_VARCHAR},
{"auto", S_AUTO},
{"bool", S_BOOL},
{"char", S_CHAR},
{"const", S_CONST},
{"double", S_DOUBLE},
{"enum", S_ENUM},
{"extern", S_EXTERN},
{"float", S_FLOAT},
{"int", S_INT},
{"long", S_LONG},
{"register", S_REGISTER},
{"short", S_SHORT},
{"signed", S_SIGNED},
{"static", S_STATIC},
{"struct", S_STRUCT},
{"union", S_UNION},
{"unsigned", S_UNSIGNED},
{"varchar", S_VARCHAR},
};
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;
}
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