jpeg pushed a commit to branch master.
http://git.enlightenment.org/core/efl.git/commit/?id=7d84c19bec7482a9f470c29ffa9390cb5b38adc7
commit 7d84c19bec7482a9f470c29ffa9390cb5b38adc7
Author: Srivardhan Hebbar <sri.heb...@samsung.com>
Date: Mon Dec 7 18:41:53 2015 +0900
eina: Adding API for base64 decode.
Summary:
Added eina_str_base64_decode API.
Signed-off-by: Srivardhan Hebbar <sri.heb...@samsung.com>
Reviewers: cedric, jpeg
Reviewed By: jpeg
Subscribers: jpeg
Differential Revision: https://phab.enlightenment.org/D3381
@feature
---
src/lib/eina/eina_str.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++
src/lib/eina/eina_str.h | 13 +++++++++
2 files changed, 89 insertions(+)
diff --git a/src/lib/eina/eina_str.c b/src/lib/eina/eina_str.c
index 4ff23e9..8685297 100644
--- a/src/lib/eina/eina_str.c
+++ b/src/lib/eina/eina_str.c
@@ -299,6 +299,11 @@ eina_str_split_full_helper(const char *str,
return str_array;
}
+static inline Eina_Bool is_base64(unsigned char c)
+{
+ return (isalnum(c) || (c == '+') || (c == '/'));
+}
+
/**
* @endcond
*/
@@ -779,3 +784,74 @@ eina_str_base64_encode(const unsigned char *src, unsigned
int len)
return dest;
}
+
+EAPI
+unsigned char *eina_str_base64_decode(const char * src, int *decoded_str_len)
+{
+ unsigned char inarr[4], outarr[3];
+ int i = 0, j = 0, k = 0, l = 0;
+ int len;
+ unsigned char *dest;
+
+ if (!src)
+ goto error;
+
+ len = strlen(src);
+ /* The encoded string length should be a multiple of 4. Else it is not a
+ * valid encoded string.
+ */
+ if (len % 4)
+ goto error;
+
+ /* This is the max size the destination string can have.
+ */
+ dest = (unsigned char *)malloc(sizeof(unsigned char) * ((len * 3 / 4) + 1));
+ if (!dest)
+ goto error;
+
+ while (len-- && ( src[k] != '=') && is_base64(src[k]))
+ {
+ inarr[i++] = src[k++];
+ if (i ==4)
+ {
+ for (i = 0; i <4; i++)
+ inarr[i] = strchr(base64_table,(int) inarr[i]) - base64_table;
+
+ outarr[0] = (inarr[0] << 2) + ((inarr[1] & 0x30) >> 4);
+ outarr[1] = ((inarr[1] & 0xf) << 4) + ((inarr[2] & 0x3c) >> 2);
+ outarr[2] = ((inarr[2] & 0x3) << 6) + inarr[3];
+
+ for (i = 0; (i < 3); i++)
+ dest[l++] = outarr[i];
+ i = 0;
+ }
+ }
+
+ if (i)
+ {
+ for (j = i; j <4; j++)
+ inarr[j] = 0;
+
+ for (j = 0; j <4; j++)
+ inarr[j] = strchr(base64_table, (int) inarr[j]) - base64_table;
+
+ outarr[0] = (inarr[0] << 2) + ((inarr[1] & 0x30) >> 4);
+ outarr[1] = ((inarr[1] & 0xf) << 4) + ((inarr[2] & 0x3c) >> 2);
+ outarr[2] = ((inarr[2] & 0x3) << 6) + inarr[3];
+
+ for (j = 0; (j < i - 1); j++)
+ dest[l++] = outarr[j];
+ }
+
+ /* This is to prevent the applications from crashing. */
+ dest[l] = '\0';
+
+ if (decoded_str_len)
+ *decoded_str_len = l;
+ return dest;
+
+error:
+ if (decoded_str_len)
+ *decoded_str_len = 0;
+ return NULL;
+}
diff --git a/src/lib/eina/eina_str.h b/src/lib/eina/eina_str.h
index c47ddb4..3caba1f 100644
--- a/src/lib/eina/eina_str.h
+++ b/src/lib/eina/eina_str.h
@@ -395,6 +395,19 @@ EAPI char *eina_strftime(const char *format, const struct
tm *tm);
*/
EAPI char *eina_str_base64_encode(const unsigned char *src, unsigned int len);
+/**
+ * @brief base64 decoding function.
+ * @param src The string to be decoded.
+ * @param decoded_str_len The length of the decoded string.
+ * @return the base64 decoded string.
+ *
+ * This will create a NULL terminated string which is base64 decode of the src.
+ * The caller has to free the returned string using free().
+ *
+ * @since 1.17.0
+ */
+EAPI unsigned char * eina_str_base64_decode(const char * src, int
*decoded_str_len);
+
#include "eina_inline_str.x"
/**
--
