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November 17, 2021 22:00
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Split an STL string without using STL just because
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| #include <string> | |
| #include "stdio.h" | |
| #include "string.h" | |
| int _get_first_string_chunk( | |
| const char *in, | |
| char *out_buffer, | |
| int buffer_length, | |
| char delimiter, | |
| int *out_size, | |
| int *out_leading_delimiters | |
| ) { | |
| int i = 0; | |
| bool leading_delimiter = true; | |
| int leading_delimiter_offset = i; | |
| while (in[i] != '\0') { | |
| if (in[i] == delimiter && !leading_delimiter) { | |
| if (buffer_length < i) { | |
| std::cout << "CRASH EXPECTED ERROR: _get_first_string_chunk: buffer_length < i" << std::endl; | |
| } | |
| strncpy(out_buffer, in+leading_delimiter_offset, i - leading_delimiter_offset); | |
| out_buffer[i] = '\0'; | |
| *out_size = i - leading_delimiter_offset; | |
| *out_leading_delimiters = leading_delimiter_offset; | |
| return i - leading_delimiter_offset; | |
| } else if(in[i] != delimiter && leading_delimiter) { | |
| leading_delimiter = false; | |
| leading_delimiter_offset = i; | |
| } | |
| i += 1; | |
| } | |
| strncpy(out_buffer, in+leading_delimiter_offset, i - leading_delimiter_offset); | |
| out_buffer[i] = '\0'; | |
| *out_size = i - leading_delimiter_offset; | |
| *out_leading_delimiters = leading_delimiter_offset; | |
| return i - leading_delimiter_offset; | |
| } | |
| void split_string(std::string in, std::vector<std::string> *chunks, char delimiter) { | |
| char buffer[100]; | |
| char *in_ptr = (char*) in.c_str(); | |
| int chunk_len; | |
| int leading_delimiters; | |
| while(_get_first_string_chunk(in_ptr, buffer, 100, delimiter, &chunk_len, &leading_delimiters) != 0) { | |
| std::string chunk; | |
| for (int i=0; i<chunk_len; i++) { | |
| chunk += buffer[i]; | |
| } | |
| chunks->push_back(chunk); | |
| in_ptr += chunk_len + leading_delimiters; | |
| } | |
| } |
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