1 files changed, 277 insertions, 0 deletions
diff --git a/src/utils/strings.c b/src/utils/strings.c
new file mode 100644
index 0000000..b3a19cc
--- /dev/null
+++ b/src/utils/strings.c
@@ -0,0 +1,277 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2014-2015 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file COPYING.
+ */
+
+#include <ctype.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "utils.h"
+
+
+char*
+b_strdup(const char *s)
+{
+    if (s == NULL)
+        return NULL;
+    size_t l = strlen(s);
+    char *tmp = malloc(l + 1);
+    if (tmp == NULL)
+        return NULL;
+    memcpy(tmp, s, l + 1);
+    return tmp;
+}
+
+
+char*
+b_strndup(const char *s, size_t n)
+{
+    if (s == NULL)
+        return NULL;
+    size_t l = strnlen(s, n);
+    char *tmp = malloc(l + 1);
+    if (tmp == NULL)
+        return NULL;
+    memcpy(tmp, s, l);
+    tmp[l] = '\0';
+    return tmp;
+}
+
+
+char*
+b_strdup_vprintf(const char *format, va_list ap)
+{
+    va_list ap2;
+    va_copy(ap2, ap);
+    int l = vsnprintf(NULL, 0, format, ap2);
+    va_end(ap2);
+    if (l < 0)
+        return NULL;
+    char *tmp = malloc(l + 1);
+    if (!tmp)
+        return NULL;
+    int l2 = vsnprintf(tmp, l + 1, format, ap);
+    if (l2 < 0)
+        return NULL;
+    return tmp;
+}
+
+
+char*
+b_strdup_printf(const char *format, ...)
+{
+    va_list ap;
+    va_start(ap, format);
+    char *tmp = b_strdup_vprintf(format, ap);
+    va_end(ap);
+    return tmp;
+}
+
+
+bool
+b_str_starts_with(const char *str, const char *prefix)
+{
+    int str_l = strlen(str);
+    int str_lp = strlen(prefix);
+    if (str_lp > str_l)
+        return false;
+    return strncmp(str, prefix, str_lp) == 0;
+}
+
+
+bool
+b_str_ends_with(const char *str, const char *suffix)
+{
+    int str_l = strlen(str);
+    int str_ls = strlen(suffix);
+    if (str_ls > str_l)
+        return false;
+    return strcmp(str + str_l - str_ls, suffix) == 0;
+}
+
+
+char*
+b_str_strip(char *str)
+{
+    if (str == NULL)
+        return str;
+    int i;
+    size_t str_len = strlen(str);
+    for (i = str_len - 1; i >= 0; i--) {
+        if (!isspace(str[i])) {
+            str[i + 1] = '\0';
+            break;
+        }
+    }
+    str_len = strlen(str);
+    for (i = 0; i < str_len; i++) {
+        if (!isspace(str[i])) {
+            str = str + i;
+            break;
+        }
+    }
+    return str;
+}
+
+
+char**
+b_str_split(const char *str, char c, unsigned int max_pieces)
+{
+    if (!str)
+        return NULL;
+    char **rv = malloc(sizeof(char*));
+    unsigned int i, start = 0, count = 0;
+    for (i = 0; i < strlen(str) + 1; i++) {
+        if (str[0] == '\0')
+            break;
+        if ((str[i] == c && (!max_pieces || count + 1 < max_pieces)) || str[i] == '\0') {
+            rv = realloc(rv, (count + 1) * sizeof(char*));
+            rv[count] = malloc(i - start + 1);
+            memcpy(rv[count], str + start, i - start);
+            rv[count++][i - start] = '\0';
+            start = i + 1;
+        }
+    }
+    rv = realloc(rv, (count + 1) * sizeof(char*));
+    rv[count] = NULL;
+    return rv;
+}
+
+
+char*
+b_str_replace(const char *str, const char search, const char *replace)
+{
+    char **pieces = b_str_split(str, search, 0);
+    if (pieces == NULL)
+        return NULL;
+    char* rv = b_strv_join((const char**) pieces, replace);
+    b_strv_free(pieces);
+    return rv;
+}
+
+
+void
+b_strv_free(char **strv)
+{
+    if (strv == NULL)
+        return;
+    unsigned int i;
+    for (i = 0; strv[i] != NULL; i++)
+        free(strv[i]);
+    free(strv);
+}
+
+
+char*
+b_strv_join(const char **strv, const char *separator)
+{
+    if (strv == NULL)
+        return NULL;
+    unsigned int i = 0;
+    b_string_t *str = b_string_new();
+    for (i = 0; strv[i] != NULL; i++) {
+        str = b_string_append(str, strv[i]);
+        if (strv[i+1] != NULL)
+            str = b_string_append(str, separator);
+    }
+    return b_string_free(str, false);
+}
+
+
+unsigned int
+b_strv_length(char **strv)
+{
+    if (!strv)
+        return 0;
+    unsigned int i;
+    for (i = 0; strv[i] != NULL; i++);
+    return i;
+}
+
+
+b_string_t*
+b_string_new(void)
+{
+    b_string_t* rv = malloc(sizeof(b_string_t));
+    rv->str = NULL;
+    rv->len = 0;
+    rv->allocated_len = 0;
+
+    // initialize with empty string
+    rv = b_string_append(rv, "");
+
+    return rv;
+}
+
+
+char*
+b_string_free(b_string_t *str, bool free_str)
+{
+    char *rv = NULL;
+    if (free_str)
+        free(str->str);
+    else
+        rv = str->str;
+    free(str);
+    return rv;
+}
+
+
+b_string_t*
+b_string_append_len(b_string_t *str, const char *suffix, size_t len)
+{
+    if (suffix == NULL)
+        return str;
+    size_t old_len = str->len;
+    str->len += len;
+    if (str->len + 1 > str->allocated_len) {
+        str->allocated_len = (((str->len + 1) / B_STRING_CHUNK_SIZE) + 1) * B_STRING_CHUNK_SIZE;
+        str->str = realloc(str->str, str->allocated_len);
+    }
+    memcpy(str->str + old_len, suffix, len);
+    str->str[str->len] = '\0';
+    return str;
+}
+
+
+b_string_t*
+b_string_append(b_string_t *str, const char *suffix)
+{
+    if (suffix == NULL)
+        return str;
+    return b_string_append_len(str, suffix, strlen(suffix));
+}
+
+
+b_string_t*
+b_string_append_c(b_string_t *str, char c)
+{
+    size_t old_len = str->len;
+    str->len += 1;
+    if (str->len + 1 > str->allocated_len) {
+        str->allocated_len = (((str->len + 1) / B_STRING_CHUNK_SIZE) + 1) * B_STRING_CHUNK_SIZE;
+        str->str = realloc(str->str, str->allocated_len);
+    }
+    str->str[old_len] = c;
+    str->str[str->len] = '\0';
+    return str;
+}
+
+
+b_string_t*
+b_string_append_printf(b_string_t *str, const char *format, ...)
+{
+    va_list ap;
+    va_start(ap, format);
+    char *tmp = b_strdup_vprintf(format, ap);
+    va_end(ap);
+    str = b_string_append(str, tmp);
+    free(tmp);
+    return str;
+}