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authorYabin Cui <yabinc@google.com>2016-01-28 00:05:57 +0100
committerGerrit Code Review <noreply-gerritcodereview@google.com>2016-01-28 00:05:57 +0100
commitd379b4410b6f7c7f08751709d08ba6f819acf69d (patch)
tree66c56ba40c468d304896d3760b64c1e322436853 /edify/lexer.ll
parentMerge "Change BCB to perform synchronous writes." (diff)
parentedify: accept long string literal. (diff)
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Diffstat (limited to '')
-rw-r--r--edify/lexer.ll24
1 files changed, 11 insertions, 13 deletions
diff --git a/edify/lexer.ll b/edify/lexer.ll
index fb2933bee..b764d1699 100644
--- a/edify/lexer.ll
+++ b/edify/lexer.ll
@@ -16,6 +16,7 @@
*/
#include <string.h>
+#include <string>
#include "expr.h"
#include "yydefs.h"
@@ -25,9 +26,7 @@ int gLine = 1;
int gColumn = 1;
int gPos = 0;
-// TODO: enforce MAX_STRING_LEN during lexing
-char string_buffer[MAX_STRING_LEN];
-char* string_pos;
+std::string string_buffer;
#define ADVANCE do {yylloc.start=gPos; yylloc.end=gPos+yyleng; \
gColumn+=yyleng; gPos+=yyleng;} while(0)
@@ -43,7 +42,7 @@ char* string_pos;
\" {
BEGIN(STR);
- string_pos = string_buffer;
+ string_buffer.clear();
yylloc.start = gPos;
++gColumn;
++gPos;
@@ -54,36 +53,35 @@ char* string_pos;
++gColumn;
++gPos;
BEGIN(INITIAL);
- *string_pos = '\0';
- yylval.str = strdup(string_buffer);
+ yylval.str = strdup(string_buffer.c_str());
yylloc.end = gPos;
return STRING;
}
- \\n { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\n'; }
- \\t { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\t'; }
- \\\" { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\"'; }
- \\\\ { gColumn += yyleng; gPos += yyleng; *string_pos++ = '\\'; }
+ \\n { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\n'); }
+ \\t { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\t'); }
+ \\\" { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\"'); }
+ \\\\ { gColumn += yyleng; gPos += yyleng; string_buffer.push_back('\\'); }
\\x[0-9a-fA-F]{2} {
gColumn += yyleng;
gPos += yyleng;
int val;
sscanf(yytext+2, "%x", &val);
- *string_pos++ = val;
+ string_buffer.push_back(static_cast<char>(val));
}
\n {
++gLine;
++gPos;
gColumn = 1;
- *string_pos++ = yytext[0];
+ string_buffer.push_back(yytext[0]);
}
. {
++gColumn;
++gPos;
- *string_pos++ = yytext[0];
+ string_buffer.push_back(yytext[0]);
}
}