[U-Boot] [PATCH V4 09/11] tools: add parse_helper file

Liu Hui-R64343
2012-11-28T10:48:31Z

>-----Original Message-----
>From: Troy Kisky [mailto:troy.kisky at boundarydevices.com]
>Sent: Wednesday, November 28, 2012 9:32 AM
>To: sbabic at denx.de
>Cc: dirk.behme at googlemail.com; u-boot at lists.denx.de; Liu Hui-R64343;
>festevam at gmail.com; Troy Kisky
>Subject: [PATCH V4 09/11] tools: add parse_helper file
>
>This file can help you parse
>configuration files.

One line is enough. :)

>
>Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Acked-by: Jason Liu <r64343@freescale.com>

>---
> tools/Makefile | 2 +
> tools/parse_helper.c | 173
>++++++++++++++++++++++++++++++++++++++++++++++++++
> tools/parse_helper.h | 28 ++++++++
> 3 files changed, 203 insertions(+)
> create mode 100644 tools/parse_helper.c create mode 100644
>tools/parse_helper.h
>
>diff --git a/tools/Makefile b/tools/Makefile index 686840a..db3b247 100644
>--- a/tools/Makefile
>+++ b/tools/Makefile
>@@ -94,6 +94,7 @@ NOPED_OBJ_FILES-y += aisimage.o NOPED_OBJ_FILES-y
>+= kwbimage.o NOPED_OBJ_FILES-y += pblimage.o NOPED_OBJ_FILES-y +=
>imximage.o
>+NOPED_OBJ_FILES-y += parse_helper.o
> NOPED_OBJ_FILES-y += omapimage.o
> NOPED_OBJ_FILES-y += mkenvimage.o
> NOPED_OBJ_FILES-y += mkimage.o
>@@ -208,6 +209,7 @@ $(obj)mkimage$(SFX): $(obj)aisimage.o \
> $(obj)fit_image.o \
> $(obj)image.o \
> $(obj)imximage.o \
>+ $(obj)parse_helper.o \
> $(obj)kwbimage.o \
> $(obj)pblimage.o \
> $(obj)md5.o \
>diff --git a/tools/parse_helper.c b/tools/parse_helper.c new file mode 100644
>index 0000000..0a5c5f6
>--- /dev/null
>+++ b/tools/parse_helper.c
>@@ -0,0 +1,173 @@
>+/*
>+ * (C) Copyright 20012 Boundary Devices Inc,
>+troy.kisky at boundarydevices.com
>+ *
>+ * Licensed under the GPL-2 or later.
>+ */
>+
>+/* Required to obtain the getline prototype from stdio.h */ #define
>+_GNU_SOURCE
>+
>+#include "mkimage.h"
>+#include <image.h>
>+#include "parse_helper.h"
>+
>+int ph_open(struct parse_helper *ph, char *filename) {
>+ ph->line = NULL;
>+ ph->len = 0;
>+ ph->fd = fopen(filename, "r");
>+ ph->lineno = 0;
>+ ph->cmd_started = 0;
>+ ph->filename = filename;
>+ ph->p = NULL;
>+ return (!ph->fd) ? -1 : 0;
>+}
>+
>+void ph_close(struct parse_helper *ph)
>+{
>+ fclose(ph->fd);
>+ ph->fd = NULL;
>+}
>+
>+int ph_skip_separators(struct parse_helper *ph) {
>+ int line_no = ph->lineno;
>+ char *p = ph->p;
>+
>+ for (;;) {
>+ char c;
>+ if (!p) {
>+ if (getline(&ph->line, &ph->len, ph->fd) <= 0)
>+ return -1;
>+ ph->lineno++;
>+ p = ph->line;
>+ if (ph->cmd_started) {
>+ fprintf(stderr, "warning: continuing command
>on"
>+ " next line, line %s[%d](%s)\n",
>+ ph->filename, ph->lineno, p);
>+ }
>+ }
>+ c = *p;
>+ if ((c == ' ') || (c == '\t')) {
>+ p++;
>+ continue;
>+ }
>+ /* Drop all text starting with '#' as comments */
>+ if ((c == '#') || (c == '\r') || (c == '\n')
>+ || !c) {
>+ p = NULL;
>+ continue;
>+ }
>+ if (c == ';') {
>+ if (ph->cmd_started) {
>+ fprintf(stderr, "Error: command not "
>+ "finished:%s[%d](%s)\n",
>+ ph->filename, ph->lineno, p);
>+ exit(EXIT_FAILURE);
>+ }
>+ p++;
>+ continue;
>+ }
>+ if (!ph->cmd_started && line_no == ph->lineno) {
>+ fprintf(stderr, "Error: extra data at end "
>+ "of line %s[%d](%s)\n",
>+ ph->filename, ph->lineno, p);
>+ exit(EXIT_FAILURE);
>+ }
>+ ph->p = p;
>+ return 0;
>+ }
>+}
>+
>+int ph_skip_comma(struct parse_helper *ph) {
>+ char *p = ph->p;
>+
>+ for (;;) {
>+ char c = *p++;
>+ if ((c == '#') || (c == '\r') || (c == '\n') || !c)
>+ return 0;
>+ if (c == ',') {
>+ ph->p = p;
>+ ph_skip_separators(ph);
>+ return 1;
>+ }
>+ if ((c != ' ') && (c == '\t'))
>+ return 0;
>+ }
>+}
>+
>+int ph_get_value(struct parse_helper *ph, uint32_t *pval) {
>+ char *endptr;
>+ uint32_t value;
>+
>+ if (ph_skip_separators(ph))
>+ return -1;
>+ errno = 0;
>+ value = strtoul(ph->p, &endptr, 16);
>+ if (errno || (ph->p == endptr))
>+ return -1;
>+ *pval = value;
>+ ph->p = endptr;
>+ return 0;
>+}
>+
>+/*
>+ * Comma separator optional
>+ * Input:
>+ * ph - input source
>+ * data - array to fill in
>+ * cnt - exact number of elements to parse
>+ * Return: number of elements parsed, or error */ int
>+ph_get_array(struct parse_helper *ph, uint32_t *data, int cnt) {
>+ int i = 0;
>+
>+ for (;;) {
>+ int ret = ph_get_value(ph, &data[i++]);
>+ if (ret)
>+ return ret;
>+ if (i >= cnt)
>+ break;
>+ ph_skip_comma(ph); /* comma is optional */
>+ }
>+ return i;
>+}
>+
>+static char *grab_token(char *dest, int size, char *src) {
>+ while (size) {
>+ char c = *src;
>+ if ((c == ' ') || (c == '\t') || (c == '\r') || (c == '\n')
>+ || (c == '#') || !c)
>+ break;
>+ *dest++ = c;
>+ size--;
>+ src++;
>+ }
>+ if (!size)
>+ return NULL;
>+ *dest = 0;
>+ return src;
>+}
>+
>+int ph_get_table_entry_id(struct parse_helper *ph,
>+ const table_entry_t *table, const char *table_name) {
>+ int val;
>+ char token[16];
>+ char *p;
>+
>+ if (ph_skip_separators(ph))
>+ return -1;
>+ p = grab_token(token, sizeof(token), ph->p);
>+ if (!p)
>+ return -1;
>+ val = get_table_entry_id(table, table_name, token);
>+ if (val != -1)
>+ ph->p = p;
>+ return val;
>+}
>+
>diff --git a/tools/parse_helper.h b/tools/parse_helper.h new file mode
>100644 index 0000000..1ff98a3
>--- /dev/null
>+++ b/tools/parse_helper.h
>@@ -0,0 +1,28 @@
>+/*
>+ * (C) Copyright 20012 Boundary Devices Inc,
>+troy.kisky at boundarydevices.com
>+ *
>+ * Licensed under the GPL-2 or later.
>+ */
>+
>+#ifndef _PARSE_HELPER_H_
>+#define _PARSE_HELPER_H_
>+
>+struct parse_helper {
>+ char *line;
>+ size_t len;
>+ FILE *fd;
>+ int lineno;
>+ char cmd_started;
>+ char *filename;
>+ char *p;
>+};
>+
>+int ph_open(struct parse_helper *ph, char *filename); void
>+ph_close(struct parse_helper *ph); int ph_skip_separators(struct
>+parse_helper *ph); int ph_skip_comma(struct parse_helper *ph); int
>+ph_get_value(struct parse_helper *ph, uint32_t *pval); int
>+ph_get_array(struct parse_helper *ph, uint32_t *data, int cnt); int
>+ph_get_table_entry_id(struct parse_helper *ph,
>+ const table_entry_t *table, const char *table_name); #endif
>--
>1.7.9.5
>