LCOV - code coverage report
Current view: top level - libs/mem/src - mem_write_zero_terminator.c (source / functions) Coverage Total Hit
Test: coverage.info Lines: 68.2 % 22 15
Test Date: 2026-07-12 01:01:34 Functions: 100.0 % 1 1
Branches: 50.0 % 18 9

             Branch data     Line data    Source code
       1                 :             : #include "mem_internal.h"
       2                 :             : #include <string.h>
       3                 :             : 
       4                 :             : /**
       5                 :             :  * @brief Overwrite one logical element with a zero terminator
       6                 :             :  *
       7                 :             :  * Writes a zero-valued element at @p terminator_index using the descriptor's
       8                 :             :  * configured element width. The helper performs only the minimal descriptor
       9                 :             :  * checks needed to reject impossible writes while remaining reusable across
      10                 :             :  * string helpers inside the library
      11                 :             :  *
      12                 :             :  * @param memory_structure Descriptor whose buffer receives the terminator
      13                 :             :  * @param terminator_index Logical element index where the terminator is written
      14                 :             :  * @return `SUCCESS` on success; `FAILURE` otherwise
      15                 :             :  */
      16                 :       70458 : Return mem_write_zero_terminator(
      17                 :             :         memory       *memory_structure,
      18                 :             :         const size_t terminator_index)
      19                 :             : {
      20                 :             :         /* Status returned by this function through provide()
      21                 :             :            Default value assumes successful completion */
      22                 :       70458 :         Return status = SUCCESS;
      23                 :       70458 :         size_t terminator_offset = 0;
      24                 :       70458 :         size_t required_bytes = 0;
      25                 :             : 
      26   [ +  -  -  + ]:       70458 :         if(memory_structure == NULL || memory_structure->single_element_size == 0)
      27                 :             :         {
      28                 :           0 :                 report("Memory management; Invalid descriptor for zero terminator write");
      29                 :           0 :                 status = FAILURE;
      30                 :             :         }
      31                 :             : 
      32   [ +  -  -  + ]:       70458 :         if((TRIUMPH & status) && memory_structure->data == NULL)
      33                 :             :         {
      34                 :           0 :                 report("Memory management; Data pointer is NULL during zero terminator write");
      35                 :           0 :                 status = FAILURE;
      36                 :             :         }
      37                 :             : 
      38         [ +  - ]:       70458 :         if(TRIUMPH & status)
      39                 :             :         {
      40                 :       70458 :                 run(mem_guarded_byte_size(memory_structure,terminator_index,&terminator_offset));
      41                 :       70458 :                 run(mem_guarded_add(terminator_offset,memory_structure->single_element_size,&required_bytes));
      42                 :             : 
      43         [ -  + ]:       70458 :                 if(CRITICAL & status)
      44                 :             :                 {
      45                 :           0 :                         report("Memory management; Zero terminator write overflows descriptor bounds");
      46                 :             :                 }
      47                 :             :         }
      48                 :             : 
      49   [ +  -  -  + ]:       70458 :         if((TRIUMPH & status) && required_bytes > memory_structure->actually_allocated_bytes)
      50                 :             :         {
      51                 :           0 :                 report("Memory management; Zero terminator write exceeds reserved capacity");
      52                 :           0 :                 status = FAILURE;
      53                 :             :         }
      54                 :             : 
      55         [ +  - ]:       70458 :         if(TRIUMPH & status)
      56                 :             :         {
      57                 :       70458 :                 memset((unsigned char *)memory_structure->data + terminator_offset,0,memory_structure->single_element_size);
      58                 :       70458 :                 telemetry_string_terminator_writes();
      59                 :             :         }
      60                 :             : 
      61                 :       70458 :         provide(status);
      62                 :             : }
        

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