echo: add --trim option

app/echo.c

@@ -49,6 +49,9 @@ struct zsv_echo_data {
       const char *sql;
     } sqlite3;
   } o;
+
+  unsigned char trim_white:1;
+  unsigned char _:7;
 };
 
 /**
@@ -86,15 +89,19 @@ static void zsv_echo_row(void *hook) {
   if(VERY_UNLIKELY(data->row_ix == 0)) { // header
     for(size_t i = 0, j = zsv_cell_count(data->parser); i < j; i++) {
       struct zsv_cell cell = zsv_get_cell(data->parser, i);
+      if(UNLIKELY(data->trim_white))
+        cell.str = (unsigned char *)zsv_strtrim(cell.str, &cell.len);
       zsv_writer_cell(data->csv_writer, i == 0, cell.str, cell.len, cell.quoted);
     }
   } else {
     for(size_t i = 0, j = zsv_cell_count(data->parser); i < j; i++) {
-      if(data->overwrite.row_ix == data->row_ix && data->overwrite.col_ix == i) {
+      if(VERY_UNLIKELY(data->overwrite.row_ix == data->row_ix && data->overwrite.col_ix == i)) {
         zsv_writer_cell(data->csv_writer, i == 0, data->overwrite.str, data->overwrite.len, 1);
         zsv_echo_get_next_overwrite(data);
       } else {
         struct zsv_cell cell = zsv_get_cell(data->parser, i);
+        if(UNLIKELY(data->trim_white))
+          cell.str = (unsigned char *)zsv_strtrim(cell.str, &cell.len);
         zsv_writer_cell(data->csv_writer, i == 0, cell.str, cell.len, cell.quoted);
       }
     }
@@ -111,6 +118,7 @@ const char *zsv_echo_usage_msg[] = {
   "",
   "Options:",
   "  -b                  : output with BOM",
+  "  --trim              : trim whitespace",
   "  --overwrite <source>: overwrite cells using given source. Source may be:",
   "                        - sqlite3://<filename>[?sql=<query>]",
   "                          ex: sqlite3://overwrites.db?sql=select row, column, value from overwrites order by row, column",
@@ -206,6 +214,8 @@ int ZSV_MAIN_FUNC(ZSV_COMMAND)(int argc, const char *argv[], struct zsv_opts *op
     const char *arg = argv[arg_i];
     if(!strcmp(arg, "-b"))
       writer_opts.with_bom = 1;
+    else if(!strcmp(arg, "--trim"))
+      data.trim_white = 1;
     else if(!strcmp(arg, "--overwrite")) {
       if(arg_i+1 >= argc) {
         fprintf(stderr, "Option %s requires a value\n", arg);

app/test/Makefile

@@ -100,7 +100,7 @@ test: ${TESTS}
 test-prop:
 	EXE=${BUILD_DIR}/bin/zsv_prop${EXE} make -C prop test
 
-test-echo : test-echo1 test-echo-overwrite test-echo-eol test-echo-overwrite-csv test-echo-chars
+test-echo : test-echo1 test-echo-overwrite test-echo-eol test-echo-overwrite-csv test-echo-chars test-echo-trim
 
 test-echo1: ${BUILD_DIR}/bin/zsv_echo${EXE}
 	@${TEST_INIT}
@@ -114,6 +114,11 @@ test-echo-eol-%: ${BUILD_DIR}/bin/zsv_echo${EXE}
 	@${PREFIX} $< ${TEST_DATA_DIR}/test/no-eol-$*.csv ${REDIRECT} ${TMP_DIR}/[email protected]
 	@${CMP} ${TMP_DIR}/[email protected] expected/[email protected] && ${TEST_PASS} || ${TEST_FAIL}
 
+test-echo-trim: ${BUILD_DIR}/bin/zsv_echo${EXE}
+	@${TEST_INIT}
+	@${PREFIX} $< ${TEST_DATA_DIR}/test/echo-trim.csv ${REDIRECT} ${TMP_DIR}/[email protected]
+	@${CMP} ${TMP_DIR}/[email protected] expected/[email protected] && ${TEST_PASS} || ${TEST_FAIL}
+
 test-echo-chars: ${BUILD_DIR}/bin/zsv_echo${EXE}
 	@${TEST_INIT}
 	@${PREFIX} echo '東京都' | $< -u '?' ${REDIRECT} ${TMP_DIR}/[email protected]

app/test/expected/test-echo-trim.out

@@ -0,0 +1,2 @@
+ hi, there
+ how ,are,  you,?  

data/test/echo-trim.csv

@@ -0,0 +1,2 @@
+ hi, there
+ how ,are,  you,?