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00034 #include "asterisk.h"
00035
00036 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 263906 $")
00037
00038 #include "asterisk/strings.h"
00039 #include "asterisk/pbx.h"
00040
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00048
00049
00050
00051 #if (defined(MALLOC_DEBUG) && !defined(STANDALONE))
00052 int __ast_debug_str_helper(struct ast_str **buf, ssize_t max_len,
00053 int append, const char *fmt, va_list ap, const char *file, int lineno, const char *function)
00054 #else
00055 int __ast_str_helper(struct ast_str **buf, ssize_t max_len,
00056 int append, const char *fmt, va_list ap)
00057 #endif
00058 {
00059 int res, need;
00060 int offset = (append && (*buf)->__AST_STR_LEN) ? (*buf)->__AST_STR_USED : 0;
00061 va_list aq;
00062
00063 do {
00064 if (max_len < 0) {
00065 max_len = (*buf)->__AST_STR_LEN;
00066 }
00067
00068
00069
00070
00071 va_copy(aq, ap);
00072 res = vsnprintf((*buf)->__AST_STR_STR + offset, (*buf)->__AST_STR_LEN - offset, fmt, aq);
00073
00074 need = res + offset + 1;
00075
00076
00077
00078
00079 if (need > (*buf)->__AST_STR_LEN && (max_len == 0 || (*buf)->__AST_STR_LEN < max_len) ) {
00080 int len = (int)(*buf)->__AST_STR_LEN;
00081 if (max_len && max_len < need) {
00082 need = max_len;
00083 } else if (max_len == 0) {
00084 need += 16 + need / 4;
00085 }
00086 if (0) {
00087 ast_verbose("extend from %d to %d\n", len, need);
00088 }
00089 if (
00090 #if (defined(MALLOC_DEBUG) && !defined(STANDALONE))
00091 _ast_str_make_space(buf, need, file, lineno, function)
00092 #else
00093 ast_str_make_space(buf, need)
00094 #endif
00095 ) {
00096 ast_verbose("failed to extend from %d to %d\n", len, need);
00097 va_end(aq);
00098 return AST_DYNSTR_BUILD_FAILED;
00099 }
00100 (*buf)->__AST_STR_STR[offset] = '\0';
00101
00102
00103 va_end(aq);
00104 continue;
00105 }
00106 va_end(aq);
00107 break;
00108 } while (1);
00109
00110 (*buf)->__AST_STR_USED = (res + offset > (*buf)->__AST_STR_LEN) ? (*buf)->__AST_STR_LEN - 1 : res + offset;
00111
00112 return res;
00113 }
00114
00115 void ast_str_substitute_variables(struct ast_str **buf, size_t maxlen, struct ast_channel *chan, const char *template)
00116 {
00117 int first = 1;
00118 do {
00119 ast_str_make_space(buf, maxlen ? maxlen :
00120 (first ? strlen(template) * 2 : (*buf)->__AST_STR_LEN * 2));
00121 pbx_substitute_variables_helper_full(chan, NULL, template, (*buf)->__AST_STR_STR, (*buf)->__AST_STR_LEN - 1, &((*buf)->__AST_STR_USED));
00122 first = 0;
00123 } while (maxlen == 0 && (*buf)->__AST_STR_LEN - 5 < (*buf)->__AST_STR_USED);
00124 }
00125
00126 char *__ast_str_helper2(struct ast_str **buf, ssize_t maxlen, const char *src, size_t maxsrc, int append, int escapecommas)
00127 {
00128 int dynamic = 0;
00129 char *ptr = append ? &((*buf)->__AST_STR_STR[(*buf)->__AST_STR_USED]) : (*buf)->__AST_STR_STR;
00130
00131 if (maxlen < 1) {
00132 if (maxlen == 0) {
00133 dynamic = 1;
00134 }
00135 maxlen = (*buf)->__AST_STR_LEN;
00136 }
00137
00138 while (*src && maxsrc && maxlen && (!escapecommas || (maxlen - 1))) {
00139 if (escapecommas && (*src == '\\' || *src == ',')) {
00140 *ptr++ = '\\';
00141 maxlen--;
00142 (*buf)->__AST_STR_USED++;
00143 }
00144 *ptr++ = *src++;
00145 maxsrc--;
00146 maxlen--;
00147 (*buf)->__AST_STR_USED++;
00148
00149 if ((ptr >= (*buf)->__AST_STR_STR + (*buf)->__AST_STR_LEN - 3) ||
00150 (dynamic && (!maxlen || (escapecommas && !(maxlen - 1))))) {
00151 char *oldbase = (*buf)->__AST_STR_STR;
00152 size_t old = (*buf)->__AST_STR_LEN;
00153 if (ast_str_make_space(buf, (*buf)->__AST_STR_LEN * 2)) {
00154
00155 break;
00156 }
00157
00158 maxlen = old;
00159
00160 ptr += (*buf)->__AST_STR_STR - oldbase;
00161 }
00162 }
00163 if (__builtin_expect(!maxlen, 0)) {
00164 ptr--;
00165 }
00166 *ptr = '\0';
00167 return (*buf)->__AST_STR_STR;
00168 }
00169